EP2222499A1

EP2222499A1 - Seat and joint cartridge for such a seat

Info

Publication number: EP2222499A1
Application number: EP08851994A
Authority: EP
Inventors: Christian FRÖHLICH; Marcel Magermans
Original assignee: Reha Group Automotive Gmbh&co KG
Current assignee: Reha Group Automotive Gmbh&co KG
Priority date: 2007-11-21
Filing date: 2008-11-20
Publication date: 2010-09-01
Also published as: DE202007016357U1; WO2009065885A1

Abstract

A seat (1), which is designed as a motor vehicle seat, for example, comprises an underframe (2), a seat cushion frame (8), which is supported on the underframe (2), having a seat cushion (4) disposed thereon, and a backrest (3), which is connected to the underframe (2). The seat cushion frame (8) is connected in an articulated way on the underframe (2). Due to the articulated attachment, the seat cushion frame (8) with the seat cushion (4) thereof can be moved for use as an exit and entry aid, starting from a main position, such as the driving position of the seat cushion frame (2) in a first movement section in the direction away from the backrest (3), before it can be pivoted subsequently in a further movement section with respect to the underframe (2). A joint cartridge (27) for installation in a seat designed as a motor vehicle seat, for example, between the underframe thereof and the seat cushion frame thereof, for retrofitting the motor vehicle seat into such a seat having an exit and entry aid, comprises a bottom part (28), which can be attached to the underframe of the motor vehicle seat, and a seat cushion frame holder (30), which can be attached to the seat cushion frame. The seat cushion frame holder (30) is attached in an articulated way to the bottom part (28) and can be moved, starting from the driving position of seat cushion frame holder (30) with respect to the bottom part (28) in a first movement section in the direction toward the front end of the joint cartridge (27) with respect to the bottom part (28), before the seat cushion frame holder (30) can subsequently be pivoted in a further movement section with respect to the bottom part (28) transversely to the longitudinal extension of the joint cartridge (27) with respect to the bottom part (28).

Description

Seat and articulated cassette for such a seat

The invention relates to a seat, such as a motor vehicle seat with a base frame, a seat cushion frame supported on the base frame with a seat cushion arranged thereon and a backrest connected to the base frame, wherein the seat cushion frame is articulated to the base frame. Furthermore, the invention relates to a joint cassette, preferably for installation in a motor vehicle seat for converting the motor vehicle seat into one with an exit and boarding aid.

Motor vehicle seats have a base, which is typically held in a pair of rails and adjustable in the longitudinal direction of the vehicle. A backrest is articulated to the underframe and a seat cushion frame with a seat cushion arranged thereon is fastened. Typically, the seat cushion in a motor vehicle seat engages under the lower end of the backrest.

To assist in getting off and / or getting in, motor vehicle seats have become known which have exit or entry aids. From US 5 636 884 A, such a seat is known. The motor vehicle seat described in this document is arranged on a carrier unit. The carrier unit itself is displaceable in transverse to the longitudinal extent of the vehicle guide rails to bring the seat closer to the vehicle door opening to facilitate entry and exit. The carrier unit comprises a hinge, by means of which the seat is pivotable about a vertical pivot axis, so that the front side of the seat for facilitated getting in and out points in the direction of the motor vehicle door. In addition, the carrier unit has a lifting fitting, with which the seat can be raised and lowered slightly. It is envisaged that is arranged on this fitting the seat for getting in and out in its lowered position. The arrangement described in this document comprises a motor vehicle seat and a carrier unit and can be used only in vehicles with a larger interior, in particular in vehicles with a sliding door, since then this motor vehicle seat adjacent to the sliding door door can be arranged.

From DE 10 2004 014 421 A1 a stand-up aid has become known. This stand-up is part of a motor vehicle seat. In this car seat, a stand-up aid is incorporated in the seat frame or seat cushion. The stand-up as part of the seat cushion is tiltable about an axis located in its front end horizontal extension, with the result that the backrest facing completion of this seat cushion segment can be raised. In addition, the vehicle seat as a whole can be pivoted about a vertical axis by a few degrees so that the front of the seat can be pivoted in the direction of the vehicle door. While the vehicle seat described in this document with its stand-up aid and its pivotability can basically be used in any motor vehicle, the help provided by this seat for getting in and out is in many cases not sufficient.

Common to the discussed prior art is that these seats are those which differ from standard built-in seats in terms of their appearance in appearance.

Based on this discussed prior art, the invention is therefore the object of developing an aforementioned generic seat in such a way that this does not differ in its sitting position or only slightly different from seats in the vehicle series and in which at least the essential elements of the seat Series can be used.

This object is achieved according to the invention by an input called seat, in which by the articulated connection of Sitzpolsterah- men with his seat cushion for use as exit or entry aid starting from a basic position, such as the driving position of the seat cushion frame in a first movement section in the direction can be moved away from the backrest before it can then be pivoted in a further movement section relative to the underframe.

In this example, designed as a motor vehicle seat is the entire seat cushion frame together with seat cushion hinged to the base. The articulated connection of the seat cushion frame to the base frame is designed in such a manner that the seat cushion frame is in addition to seat cushion against the base frame both in the direction of the backrest away and against the base frame pivotally. The movement of the seat cushion frame from the backrest and the pivotability thereof serves the purpose of bringing the seat cushion as a whole closer to the entry area of the motor vehicle. The base and the hinged to the base backrest, however, remain in their original position. The undercarriage thus remains in its bottom guides and this is adjustable in the longitudinal direction of the vehicle to determine the seating position.

Since the entire seat cushion frame is moved in this seat, can be used to build this seat, the seat cushion frame together with seat cushion of a motor vehicle seat according to mass production. The same applies to the underframe and the backrest. Only the connection of the seat cushion frame to the base takes place with the interposition of joints, which are responsible for the articulated connection of the seat cushion frame to the base frame.

According to a preferred embodiment, a joint cassette is used to build a seat, especially such a vehicle seat between the seat cushion frame and the base. This has a frame side fixed lower part. The lower part of the joint cassette carries the elements required for the mobility of the seat cushion frame. A seat cushion frame holder serves to connect the articulated cassette to the seat cushion frame. This is connected to the lower part with the joints necessary for movability being interposed. To construct a seat, it is therefore only necessary to release the seat cushion frame from the underframe in a motor vehicle seat from the series, to fasten the articulated cassette to the underframe and then to connect the seat cushion frame to the articulated cassette. Such a hinge cartridge can be readily formed such that in a conception of a motor vehicle seat this in his sitting position no external difference between a with - A -

a motor vehicle seat equipped with such a joint cartridge and one which is equipped without such a joint cartridge. For this reason too, the interior design of a motor vehicle is not disturbed by such a motor vehicle seat. In a refinement of such a motor vehicle seat, it is provided that the seat cushion frame can not only be moved away from the backrest relative to the underframe, but can also be raised relative to the undercarriage. This is desirable for many types of vehicle to bring the seat cushion frame in a sufficient height, so that for pivoting the Sitzpolsterah- men this can also be pivoted across the B-pillar away. Moreover, the lifting of the seat cushion frame facilitates disembarkation, since the person using such a motor vehicle seat is raised in the process of disembarking. The same applies in the opposite case for boarding, since then a person sitting on such a motor vehicle seat with raised seat cushion frame and thus with raised seat cushion has to lower far less to get into contact with the seat cushion. The entry and exit from a motor vehicle with such a motor vehicle seat can be further assisted if, in addition, the seat cushion frame is tiltable in such a way that it tilts towards its front end, whereby the rear area of the seat cushion frame, on which Finally, the weight of a person sitting on it rests, is raised. The tilting axis is located, based on the length of the seat cushion, preferably in the region of the front third of the seat cushion. With such an arrangement of the tilting axis, the seat cushion is tilted downward in its front area in accordance with the tilting movement, while the other seating area areas are raised. A person using this vehicle seat therefore does not need to be lifted over the front end of the seat cushion.

In providing a joint cartridge for realizing the articulated chain between the undercarriage and the seat cushion frame may be provided to connect to the lower part of such a hinge cartridge formed from at least one, suitably two wishbone pairs handlebar system for realizing the lifting movement and the movement of the seat cushion frame away from the backrest. The wishbones of such a handlebar system are articulated around a horizontally arranged Nete pivot axis hinged to the bottom of the occasional cassette. The spaced therefrom second hinge points of the control arms are connected to a joint cassette associated upper part. The upper part in turn carries a pivoting part, which is preferably pivotable about a vertically oriented pivot axis relative to the upper part. The pivot axis is arranged eccentrically to the seating surface provided by the seat cushion, so that by the pivoting movement of the pivot plate to which the seat cushion frame is connected, this can be moved further toward the door opening. In the event that the seat cushion frame is provided tiltable to further support an entry and exit, the seat cushion frame is connected to a horizontal pivot axis to the upper part.

According to a further exemplary embodiment for realizing the invention, an electromotive drive unit is used to bring about the movement sequence of the seat cushion frame. According to one embodiment of such a configuration sits on the drive shaft of the drive unit, a drive pinion for driving a rack. The rack is curved in two planes according to the movements to be performed, for enabling the first moving section in the running direction and for realizing the pivoting movement of the seat cushion frame across the running direction. Connected to the rack is the seat cushion frame, either directly or with the interposition of an upper part, in the event that the Sitzpolsterrah- men to be tilted in a final movement section to its front end. In the latter case, the drive unit is associated with a second rack, whose induced by a drive pinion movement is converted into a pushing movement for tilting the seat cushion frame with the interposition of a crossbar. It can be provided that both racks are in engagement with one and the same drive pinion or that a pinion for each rack is provided on the drive shaft. In such an embodiment, the seat cushion frame is pivotally connected about its tilt axis to an upper part, which is engaged by the first rack.

Such an embodiment using an electromotive drive unit can also be realized by means of a joint cassette, in order to be able to retrofit a motor vehicle seat originating from series production without further ado for equipping it with an exit and entry aid.

The invention is described below with reference to an embodiment with reference to the accompanying figures. Show it:

1 is a perspective view of a motor vehicle seat with its seat frame in the sitting position,

Fig. 2 is a longitudinal sectional view of the motor vehicle seat of

FIG. 1,

2 shows a longitudinal sectional illustration of the motor vehicle seat of FIG. 2 with its seat cushion frame in a first position adjusted relative to the sitting position, FIG.

4 shows the motor vehicle seat of FIG. 1 with its seat cushion in a second position adjusted relative to the sitting position, FIG.

Fig. 5: the motor vehicle seat of Figure 4 with the swung out

Seat cushion frame in its intended for entry and exit tilted position of its seat cushion frame,

6a-6e show a schematically illustrated articulated cassette with which the seat cushion frame is connected to the undercarriage of the motor vehicle seat in different positions of the seat cushion frame connected to the articulated cassette with respect to the underframe.

7 shows a joint cassette in a perspective simplified view of a motor vehicle seat with individual elements in the driving position,

Fig. 8: a partially Asked representation of the joint cassette of

FIG. 7, FIG. 9 shows the articulated cassette of FIG. 7 after adjustment of the seat cushion frame starting from the driving position into an entry or exit aid position, FIG.

10 is a schematic, partially sectioned view of the

Articulated cassette of Figure 9,

FIG. 11 shows the joint cassette of FIG. 7 after passing through a further movement section of the seat cushion frame, in which the movement section of the seat cushion frame has been pivoted relative to the position shown in FIG. 9, and FIG

FIG. 12 shows the articulated cassette of FIG. 11 with the seat cushion frame displaced into its tilted position after the pivoting movement has been carried out.

A motor vehicle seat 1 has a lower frame 2 and a back rest 3, which is not shown in detail on the lower frame 2 is articulated. Furthermore, the motor vehicle seat 1 has a seat cushion 4 which is arranged on a seat cushion frame, which is not recognizable in FIG. The undercarriage 2 has two side cheeks 5, 5 ', of which one side cheek 5 can be seen in FIG. Each side wall 5, 5 'engages on the underside in an integrated into the bottom of a motor vehicle guide rail 6, 6' a. The guide rails 6, 6 'extend in the longitudinal direction of the motor vehicle. In these, the motor vehicle seat 1 is adjustable with respect to its sitting position in the longitudinal direction of the motor vehicle. The undercarriage 2 is held locked in a conventional manner according to the adjusted seat position relative to the guide rail 6, 6 '. A lever 7 serves to release the lock when the position of the motor vehicle seat 1 within the guide rails 6, 6 'to be changed.

The structure of the motor vehicle seat 1, as far as this is required for the description of the invention, is apparent from the longitudinal sectional views of Figures 2 and 3. The seat cushion 4 engages in the in the figures 1 and 2 shown sitting position of the vehicle seat 1 with its rear end under the backrest 3. The seat cushion 4 is arranged on a seat cushion frame 8. The seat cushion frame 8 is connected to the underframe 2 with the interposition of a joint cassette designated overall by the reference numeral 9. Thus, the seat cushion frame 8 is supported on the undercarriage 2 via the hinge cartridge 9. The two side walls 5, 5 'of the underframe 2, wherein in Figure 2, the side cheek 5' can be seen, are connected by cross braces 10, 1 1 with each other.

The articulated cassette 9 has an open box-like lower part 12 which, at its end facing the backrest 3, has a offset 13 which rests with its cranked section 14 on the upper side of the transverse crab 10. The lower part 12 is fixedly connected to the base 2. In the illustrated embodiment, the lower part 12 is screwed to the side walls 5, 5 'of the undercarriage 2. Such an attachment point 15 can be seen in FIG. On the front side, the lower part 12 of the joint cartridge 9 is also connected by means of screws 16 to the crossbar 1 1. To the lower part 12 is hinged an upper part 17 as a further part of the joint cassette 9. The articulated connection between the lower part 12 and the upper part 17 is effected by two wishbone pairs, of which in FIG. 2 a pair of wishbones, formed by the control arm 18 and the control arm 19, can be seen. The further wishbone pair is arranged parallel to the figures 2 and 3 recognizable transverse handlebar pair. The wishbones 18, 19 are, as can be seen more clearly in Figure 3, connected at one end to side cheeks 20 of the lower part 12. The pivot axes, with which the wishbones 18, 19 are connected to the lower part 12 are marked in Figure 3 with S ₁ , S ₂ . The second joint points of the transverse links 18, 19 spaced from the pivot axes Si, S ₂ are connected to the upper part 17. These pivot axes bear the reference symbols S ₃ and S ₄ . Thus, the two wishbones 18, 19 together with the lower part 12 and the upper part 17 a trained in the manner of a parallel link arm system. This serves the purpose, starting from the sitting position, of moving the upper part 17 and the finally attached seat cushion frame 8 together with the seat cushion 4 away from the backrest 3 and at the same time lifting it relative to the lower frame 2. Moving away the seat cushion 4 of the backrest 3 is necessary so that the seat cushion 4, can be lifted from the backrest 3 unhindered. At the same time the seat cushion 4 is moved away from side cheeks 21 of the backrest 3 by such a movement, so that it is easier for a person sitting on the seat cushion 4 person to get out of the vehicle seat 1.

While Figure 2 shows the seat cushion frame 8 together with seat cushion 4 in the sitting position and with an inclination of the seat (indicated by the inclination of the upper part 17), it is clear from Figure 3 that the inclination of the upper part 17 after lifting it from the lower part 12 is horizontal or runs approximately horizontally. In order to achieve this, the distance of the pivot axes S ₂ , S _{4 of} the rear armature closer wishbone 19 from each other is smaller than the distance of the pivot axes Si, S _{3 of} the backrest distant wishbone 18 from each other.

The upper part 17 of the articulated cassette 9 carries a pivoting device 22 with which a pivot plate 23 is connected to the upper part 17. The pivot plate 23 may be part of the seat cushion frame 8. In any case, the seat cushion frame 8 is connected to the pivot plate 23. The pivoting device 22 is located in the rear in the direction of travel right quarter of the seat cushion frame 8. This has the consequence that in a pivoting movement of the pivot plate 23 together with seat cushion frame 8 and seat cushion 4, the seat cushion 4, as shown in Figure 4, is pivoted in the direction to exit , Since the seat cushion frame 8 is raised in relation to the seat position, the seat cushion frame 8 or the swivel plate 23 with the seat cushion frame 8 can easily be guided over the B pillar of the motor vehicle. In this position, a seated on the seat cushion 4 person on this comfortable, as ergonomically ter performed by the side cheeks of Sitzpols- ter, while still standing with their feet on the floor on which the motor vehicle is standing, can still stand , Starting from this position, the person then only needs to get up, and without having to carry out a necessary rotational movement of the body, without or as far as possible. By raising the seat cushion 4 in relation to the sitting position of the motor vehicle seat 1, the height to be overcome for rising is lower and therefore getting up is facilitated. Conversely, this also applies to sitting down on the seat 1 in this position. The motor vehicle seat 1 of the described embodiment has a further feature. This is shown in FIG. The seat cushion frame 8 is tiltable relative to the pivot plate 23 about a pivot axis located in the front area of the seat cushion frame 8 - the pivot axis 24 (compare FIGS. 2, 3). Due to the tilting movement, a person sitting on the motor vehicle seat 1 is pushed out of the seat. The pivot axis 24 is located in the front third of the seat cushion 4, based on its longitudinal extent. When the seat cushion frame 8 or the seat cushion 4 pivot about the pivot axis 24, the front end 25 of the seat cushion 4 lowers, while at the same time seen from the pivot axis 24 to the backrest 3 and the rear end of the seat cushion 4th subsequent areas are raised.

From Figure 5, the connection of the rotary joint device 22 on the pivot plate 23 can be seen. This connection is identified by the reference numeral 26 in FIG. Clearly visible is the eccentric position and the consequent pivoting of the seat cushion frame 8 in the direction of the door opening of the motor vehicle.

The design of the hinge cassette 9 allows installation thereof in a motor vehicle seat 1 from mass production. Thus, all of the components of the motor vehicle seat 1 shown in the figures are those of series production. For the construction of the motor vehicle seat 1, it has only been necessary to release the seat cushion frame 8 together with the seat cushion 4 from the underframe 2 to which it was previously secured, to fasten the hinge cassette 9 to the underframe 2 and then to connect the seat cushion frame 8 to the pivoting frame 8. plate 23 to connect.

FIGS. 6a to 6e show, in a very schematic representation, the articulated cassette 9, specifically merely to illustrate the sequence of movement and the articulated connection of the individual elements to one another on this model shown in FIGS. The elements already described for the motor vehicle seat 1 are identified by the same reference numerals in the articulated cassette 9 of FIGS. 6a to 6e. FIG. 6a shows the articulated cassette 9 in a position of its elements, which they assume in the sitting position of the seat cushion frame 8 according to FIGS. 1 and 2. Recognizable from Figure 6a, the compact arrangement of the individual elements 12, 17, 23 of the hinge cassette 9 to each other in the sitting position of the seat cushion frame 8, which is designed in this model as a plate. The pivot axes of the control arms 18, 19 are also marked with the reference symbols Si - S ₄ .

FIG. 6b shows the swivel plate 23 and the upper part 17 carrying the seat cushion frame 8, which is located opposite the lower part 12 in its raised position. In Figure 6c, the pivot plate 23 is partially pivoted with the seat cushion frame 8 relative to the upper part 17; FIG. 6 d shows the fully pivoted-out pivot plate 23, which corresponds to the position of the position of the motor vehicle seat 1 in FIG. 4. By the pivotable articulation of the seat cushion frame 8 to the pivot plate 23 of the seat cushion frame 8 relative to the pivot plate 23, as shown in Figure 6e tiltable. The position of the elements of the articulated cassette 9 shown in FIG. 6e corresponds to the position of the motor vehicle seat of FIG. 5.

The described sequence of movements for converting the motor vehicle seat 1 from its sitting position (driving position) shown in FIG. 1 as basic position into its exit and entry position shown in FIG. 5 can be carried out manually, gas springs or other energy-storing spring elements being able to be used to assist in this conversion , The energy is stored in such movement-supporting parts in the course of the entry movement, whereby at the entrance these elements dampen the entry movement at the same time. Similarly, individual movements or even the entire sequence of motions can be driven by an electric motor.

In the sitting position of the motor vehicle seat 1, this is locked to the underframe 2 and / or the lower part 12 of the articulated cassette 9, so that mobility of the seat cushion frame 8 with the seat cushion 4 arranged thereon is blocked without releasing the lock. The sequence of movement of a motor vehicle seat, as described above with reference to FIGS. 6a to 6e, is carried out by an electric motor in the exemplary embodiment described below. Figure 7 shows a hinge cartridge 27. The hinge cartridge 27 is simplified in the figures and shown without hinge pins or other connectors. The articulated cassette 27 comprises a lower part 28, an upper part 29 and a seat cushion frame holder 30 hinged to the upper part 29. The lower part has connection means for connecting it to the underframe of a seat, in particular a motor vehicle seat. On the seat cushion frame holder 30, a seat cushion frame can be attached with seat cushion thereon. Thus, the hinge cartridge 27 is for installation in a motor vehicle seat between its base and its seat cushion frame for equipping the same with an exit and boarding assistance. The upper part 29 is hingedly connected to the lower part 28, with the interposition of a drive device indicated overall by the reference numeral 31. The seat cushion frame holder 30 is tiltable relative to the upper part 29, namely about a tilting axis K located in the region of the front end of the seat cushion frame holder 30. The upper part 29 is movable in the longitudinal direction relative to the lower part 28 and can be raised relative to the latter about a pivot axis 32 transverse to Longitudinal axis of the hinge cartridge 27 pivotally. The pivot axis 32 is arranged eccentrically with respect to the central longitudinal axis of the hinge cassette 27, and offset to the exit side.

The drive device 31 comprises an electromotive drive unit 33, which is embodied in the illustrated embodiment by two electric motors 34, 34.1. The electric motors 34, 34.1 drive a common drive shaft, on which a drive pinion 35 is seated. The use of two parallel operating electric motors 34, 34.1 has a favorable effect on the lowest possible height of the drive unit 33. The drive unit 33 and accordingly also the drive pinion 35 are part of the lower part 28.

With the interposition of a pair of arms spaced apart in the longitudinal axial direction of the joint cartridge 27, the upper part 29 is pivotally connected to the lower part 28. In this pair of handlebars acts it is ultimately a pair of handlebars, as shown in the schematic embodiment of Figures 6a to 6e, wherein, in contrast to the embodiment shown in Figures 6a to 6e, the links of this embodiment between the lateral terminations of the hinge cartridge 27 are arranged. In Figure 7, the head 37 of the rear arm L can be seen. In FIGS. 9 and 10, the rear link L of this link pair can be seen. The handlebars carry an output block 38, in which a pivot axis 32 forming the bolt 36 is fixed. By the bolt 36, the upper part 29 is connected by means of a transverse strut 39 to the drive block 38. Part of the output block 38 are two racks 40, 41, of which in Figure 1, only the outer rack 40 can be seen. The arrangement of the rack 41 can be seen in FIG. In the partially cutaway view of the articulated cassette 27 in FIG. 8, in the driving position (basic position) of the upper part, the engagement of the toothed rack 40 in the drive pinion 35 is shown. The rack 40 is worked in the illustrated embodiment as a sheet metal part, wherein this is curved in two planes. A first rack section Z ₁ is convexly curved in the direction of the teeth 7 of the rack 40. This rack section Z ₁ is used to move the upper part 29 with the output block 38 away from the lower part 28 in the direction of travel and for lifting the upper part 29 relative to the lower part 28. The rack section Z ₁ merges into a toothed rack Z curved toothed rack section Z ₂ , the center of curvature of this section with the pivot axis 32 is congruent or approximately congruent. Due to the pair of handlebars, the upper part 29 is limited in its lifting movement and its amount of movement in the direction of travel, so that upon reaching this stop, the upper part 29 can be pivoted in the direction of the vehicle door due to its pivotable connection to the drive block 38 via the bolt 36. Concentric or approximately concentric with the rack 40, the rack 41 is arranged in the illustrated embodiment. This is kinematically coupled to the movement of the rack 40 in a first movement section. About a certain, visible in Figure 2 route are both racks 40, 41 together with the drive pinion 35 into engagement. The toothed rack 41 is trailing over the possible amount of movement of the toothed rack 40 in its position shown in FIG. 8, and can continue to move after the toothed rack 40 has reached its end position. be moved without the rack 40 is moved. This serves to tilt the seat cushion frame holder 30. For this purpose, the seat cushion frame holder 30 is connected via an adjusting rod 42 to the rack 41. The control rod 42 itself engages the cross brace 43 of each side of the upper part 29 associated lever fitting 44, 44.1.

FIG. 9 shows the articulated cassette 27 after passing through its first movement section, in which the rack 40 has been moved by the drive pinion 35 via its first rack section Z ₁ . In the course of this movement, the upper part 29 has been raised with its output block 38 relative to the lower part 28 in the direction of travel forward and at the same time. FIG. 10 shows the position of the toothed rack 40 in this position of the articulated cassette in relation to the drive pinion 35.

The further drive movement, in which the output is moved via the rack 40 in a pivoting movement about the pivot axis 32 of the upper part 29, can be seen in Figure 1 1. From this representation, it is clear that in the raised position of the output block 38 and the upper part 29, the upper part 29 is additionally supported by a running on a support track 45 of the lower part 28 support roller 46. Thus, the upper part 29 is on top of the output block 38 and the support track 45.

Figure 1 1 shows the swung-out position of the upper part 29. In this position, it can be seen that the drive pinion 35 is no longer in engagement with the toothing Z of the toothed rack 40, and consequently no further pivotal movement of the upper part 29 is carried out in another left-handed drive. In this position, however, the rack 41 is still engaged with the drive pinion 35, so that in the course of a further drive of the same alone the rack 41 is moved. As a result of this movement, the adjusting rod 42 is moved toward the front end of the upper part 29 so that the seat cushion frame holder 30 is tilted about its tilting axis K via the lifting fittings 44, 44. Consequently, the seat cushion located on the seat cushion frame holder 30 is raised with its rear end, thereby facilitating the getting up of a person sitting thereon. Conversely, the same applies to a desired sitting down on a seat cushion frame holder 30. sensitive seat cushion.

The return movement of the seat cushion frame holder from the extended and tilted position shown in FIG. 12 into its driving position shown in FIG. 7 is effected by driving the drive pinion 35 in the reverse direction of rotation. Depending on the force provided by the drive unit 33, it may be desirable to support one or more of the above-described movements, in particular the Aufstellkippbewegung of the seat cushion frame holder 30 by means of a force storage element, for example a gas spring.

It becomes clear from the description of the above exemplary embodiment that the contour of the rack section Z _{1 is} the first movement section which a seat cushion frame connected to the seat cushion frame holder 30 defines starting from the driving position. In the illustrated embodiment, this rack portion Z _{1 is} curved, so that the vectorial portion of the movement regarding the lifting movement with increasing displacement amount is lower. Instead of a curved convex design of the rack portion Z ₁ , this may also be curved straight or concave. In the illustrated embodiment, however, the transition between the lifting translatory movement of the seat cushion frame holder into the pivoting movement by a rounded transition between the two rack sections Z ₁ and Z _{2 is} gentle for a user.

The invention has been described with reference to exemplary embodiments. Without departing from the scope of the present claims, numerous further embodiments for a person skilled in the art will make it possible to implement the invention without these having to be explained in detail. This includes, for example, the realization of the invention in other seats in which an entry and exit aid is desired. For example, the invention can be readily used in so-called stairlifts or to support the entry and exit of a person from a bathtub, just to name a few examples. Especially the conception of the articulated cassettes described allows the conversion or equipment of seats for a variety of applications for providing an entry and exit aid or a Sit down and stand up.

LIST OF REFERENCE NUMBERS

1 motor vehicle seat 34, 34.1 electric motor

2 Underframe 35 Drive pinion

3 backrest 36 bolts

4 seat cushion 37 head, 5 'side cheek 38 drive block, 6' guide rail 39 cross brace

7 lever 40 rack

8 seat cushion frame 41 rack

9 Joint cassette 42 Adjusting rod

10 cross brace 43 cross brace

11 Cross brace 44, 44.1 Lifting handle

12 lower part 45 support track

13 crank 46 support roller

14 Section of cranking L Handlebar

15 Fastening K Tilting axle

16 screw Si - S ₄ pivot axis

17 upper part Z toothing

18 wishbone Zi, Z ₂ rack section

19 wishbone

20 side cheek

21 side cheek

22 pivoting device

23 swivel plate

24 pivot axis

25 Front end of the seat cushion

26 connection

27 articulated cassette

28 lower part

29 top part

30 seat cushion frame holder

31 drive device

32 pivot axis

33 drive unit

Claims

claims

A seat, such as a motor vehicle seat with a base frame (2), a seat cushion frame (8) supported on the base frame (2) with a seat cushion (4) arranged thereon and a backrest (3) connected to the base frame (2), the seat cushion frame ( 8) is pivotally connected to the underframe (2), characterized in that by the articulated connection of the seat cushion frame (8) with its seat cushion (4) for use as exit and

Starting aid starting from a basic position, such as the driving position of the seat cushion frame (8) in a first movement portion in the direction of the backrest (3) is movable away before it is then pivotable in a further movement section relative to the lower frame (2).

2. Seat according to claim 1, characterized in that in the course of the first movement section of the seat cushion frame (8) relative to the lower frame (2) can be raised.

3. Seat according to claim 1 or 2, characterized in that the seat cushion frame (8) in its from the backrest (3) away and against the base frame (2) pivoted position towards the front seat cushion closure (25) is tilted out.

4. Seat according to claim 3, characterized in that the tilting axis (24) of the seat cushion frame (8), based on the length of the seat cushion (4) and starting from its front end (25) is arranged in its front third.

5. Seat according to one of claims 1 to 4, characterized in that the seat cushion frame (8) with the interposition of a between the base frame (2) and the seat cushion frame (8) arranged hinge cassette (9, 27) attached to the underframe (2). is closing.

6. Seat according to claim 5, characterized in that the joint cassette (9, 27) has a lower part (12, 28) fixed to the underframe (2), which lower part (12, 28) is a carrier for the elements used for the articulated connection of the seat cushion frame (8, 30).

7. Seat according to claim 6, characterized in that the hinge cassette (9) relative to the lower part (12) liftable and from the backrest (3) movable away upper part (17) identifies, in turn, a pivoting part (23) is articulated, wherein the pivot axis between the pivoting part (23) and the upper part (17) extends at right angles to the plane of the upper part (17), to which pivoting part (23) of the seat cushion frame (8) is connected.

8. Seat according to claim 4, characterized in that for articulated connection of the seat cushion frame (8) to the underframe (2) at least one wishbone pair (18, 19) comprehensive lifting fitting is provided, which wishbone (18, 19) in the seat longitudinal direction pivotally with its one end of the frame side and with its other end seat cushion frame side are articulated.

9. Seat according to claim 8, characterized in that the distance of the hinge points (S ₂ , S ₄ ) of the back-leaning wishbone (19) from each other is smaller than the distance of the hinge points (Si, S ₃ ) of the front, backrest-remote control arm (18). from each other.

10. Seat according to one of claims 1 to 9, characterized in that the seat frame (8) is locked in its sitting position, in particular on the underframe (2).

11. Seat according to one of claims 1 to 7, characterized in that the motor vehicle seat is associated with an electric motor drive unit for adjusting the seat cushion frame due to its articulated connection to the undercarriage.

12. Seat according to claim 1 1, characterized in that on the shaft of the drive unit (31) a drive pinion (35) sits and for adjusting the seat cushion frame (30) with respect to its first and a further movement section as a driven element with respect to their toothing in the direction and transverse to the direction of curved rack (40) is provided, which in turn to the seat cushion frame (30) or the seat cushion frame (30) carrying part (29) is connected, wherein the center of curvature of the Transversely to the direction of curved portion of the rack (40) of the pivot axis (32) of the seat cushion frame (30) in its further movement section corresponds to or is arranged in a near region around this.

13. Seat according to claim 12 in its back reference to one of claims 3 to 7, characterized in that as drive of the tilting movement of the seat cushion frame (30) a further rack (41) is driven by the drive pinion (35), which rack (41) via an actuating rod (42) and at least one

Fitting (44, 44.1) to the seat cushion frame (30) is connected, which in turn is pivotally connected to a of the first rack (40) movable upper part (29).

14. Seat according to claim 13, characterized in that the two toothed racks (40, 41) mounted concentrically to each other pivotally and over a part of their movement together or successively with the drive pinion (35) are engaged.

15. articulated cassette for installation in a motor vehicle seat between its underframe (2) and its seat cushion frame (8) for converting the motor vehicle seat (1) into one with an exit and boarding aid, comprising a to the underframe (2) of the motor vehicle seat (1) connectable lower part (12, 28) and to the seat cushion frame (8) connectable seat cushion frame holder (30), wherein the seat cushion frame holder (30) is pivotally connected to the lower part (12, 28) and starting from a basic position of seat cushion frame holder (30) relative to the Lower part (12, 28) in a first movement portion towards the front end of the hinge cassette (9, 27) relative to the lower part (12, 28) is movable before the seat cushion frame holder (30) subsequently in a further movement section relative to the lower part (12, 28) transversely to the longitudinal extension of the hinge cassette (9, 27) relative to the lower part (12, 28) is pivotable.

16. Joint cartridge according to claim 15, characterized in that it has a relative to the lower part (12, 28) liftable and according to the first movement portion movable part (17, 38) to which in turn a further part (23, 29) is articulated, wherein the pivot axis between the two parts (17, 23, 29, 38) extends at right angles to the plane of the upper part (17), to which pivoting part the seat cushion frame holder is connected.

17. An articulated cassette according to claim 15 or 16, characterized in that for the articulated connection of the Sitzpolsterrrahmen- holder (30) to the lower part (12, 28) at least one a wishbone pair (18, 19) comprehensive lever fitting is provided, which wishbone (18, 19) are pivotally mounted in the hinge cassette longitudinal direction with its one end sub-part side and with its other end seat cushion frame holder side.

18. Joint cartridge according to claim 17, characterized in that the distance of the hinge points (S ₂ , S ₄ ) of the Rücklehnennähe- ren wishbone (19) from each other is smaller than the distance of the hinge points (S ₁ , S ₃ ) of the front, backward remotely Querlen - kers (18) from each other.

19. Joint cartridge according to one of claims 15 to 18, characterized in that the joint cassette (27) is associated with a drive unit (31) for adjusting the seat cushion frame holder (30) due to its articulated connection to the lower part (28).

20. An articulated cassette according to claim 19, characterized in that on the shaft of the drive unit (31) a drive pinion (35) sits and for adjusting the seat cushion frame (30) with respect to its first and a further movement section as the output element with respect to their teeth in the running direction and is provided transversely to the direction of curved rack (40), the in turn to the seat cushion frame (30) or the seat cushion frame (30) carrying part (29) is connected, wherein the center of curvature of the curved transversely to the direction of the portion of the rack (40) of the pivot axis (32) of the Sitzpols- terrahmens (30) in its further movement section corresponds or is arranged in a near area around this.

21. joint cartridge according to claim 20, characterized in that as drive of the tilting movement of the seat cushion frame (30) a further rack (41) by the drive pinion (35) is driven, which rack (41) via an actuating rod (42) and at least one fitting (44, 44.1) to the seat cushion frame (30) is connected, which in turn is pivotally connected to a of the first rack (40) movable upper part (29).

22. An articulated cassette according to claim 21, characterized in that the two toothed racks (40, 41) mounted concentrically to each other pivotally and over a part of their movement together or successively with the drive pinion (35) are engaged.