DE4342959A1 - Vehicle seat with convertible upholstery sections - Google Patents

Abstract

The backrest cushion (13) of the vehicle seat is divided into a middle section (25) and two side cheeks (26) joined to the middle section. The side cheeks each have a shorter upper section and a longer lower section. The upper sections are formed from the upholstered swivel arms (27) of the head support (14), and the lower sections are made as upholstery shanks (28) movable to a position in front of the middle section. A child's air bag (56) is installed in the rear region of the head cushion (31) of the head support.

Description

The invention relates to a vehicle seat according to the Preamble of claim 1.

Vehicle seats with so-called integrated child safety seat have the advantage that they are on the one hand as usual Seating offer for normal sized people used and on the other hand, in just a few steps, into a safety seat can be converted for smaller children who the on the Seat with the child is at least equally good security offers, as usual, separate child seats that are currently available the back seat of passenger cars permanently installed become.

In a known vehicle seat of this type (WO 88/05733) has the child restraint next to that in one Headrest swivel headrest another one full bucket seat on the lower, rear End fixed on a swivel axis on the backrest is. The bucket seat that is in the use position with his The floor on the seat cushion of the seat cushion can move around the swivel axis can be folded back by about 90 °, being in an opening provided in the backrest so far that the bottom of the bucket seat is flush with  the front surface of the backrest cushion. The floor is with a corresponding padding that the recess completely closes and visually on the backrest upholstery adjusts so that the impression of a closed Backrest upholstery is created. In the use position of the Restraint device encloses the folded down Headrest sideways and in front of the child and prevents one The child falls out of the bucket seat. In addition, the child still secured with a harness.

In the case of such a bucket seat, the back part is also the one must ensure a head system for the child, necessarily always longer than the depth of the backrest, so that when the bucket seat is swung into the backrest the back part of the bucket seat through the backrest protrudes into the trunk and uses the space there impaired. In addition, the breakthrough in the Backrest an often undesirable connection to the Trunk created. The additional belt is for the child's safety is extremely beneficial but the child too immobile at the bucket seat, what the child, especially when driving long distances, in most Cases is felt to be unbearable.

The invention has for its object a vehicle seat of the type mentioned at the beginning, in which the simple child restraint to be handled by the child on all sides, So equally good in front, rear and side impact, protects and at the same time the child without affecting the Security leaves a certain freedom of movement and visibility, the one for the child even for longer journeys provides adequate seating comfort. In addition, the integrated child restraint system be suitable for different age groups and height,  although for larger children for whom the transition to normal use of the vehicle seat is imminent, a certain loss of comfort must be accepted.

The task for a vehicle seat is the one in the preamble of Claim 1 defined genus according to the invention the features in the characterizing part of claim 1 solved.

The vehicle seat according to the invention has the advantage that the Restraint system thanks to the fold-out side panels, the upper area of the padded swivel arms of the Headrest and in the lower area from the backrest extendable side pad legs are formed, the Child both in the lower body area and in the head area offers good lateral support. This side support is important for the safety of the child in the event of a side impact and also offers the possibility of leaning on a comfortable sleeping position, which in turn increases seating comfort benefits. In the event of a frontal impact, the child will go through the large catch frame, that of the head cushion and the Swivel arms of the headrest is restrained. This results in less stress for the child than when using belt systems. The complete absence of a belt gives the child a larger one Freedom of movement, which further improves seating comfort.

Due to the forced coupling of the swivel arms of the headrest and the lower part of the side cheeks Padded legs are quick and easy to use ensured because after the child has taken a seat on the seat the headrest only has to be swiveled in front of the child. This forced coupling of the headrest and upholstery leg but also makes it much easier for the child to get started the seat, because the side bolsters only fold out when that  Child has already taken a seat and the headrest down is pivoted.

The vehicle seat according to the invention can also be used as a rear seat foldable backrest can be used because of the high Position of the swivel axis of the headrest when the headrest is folded down the backrest in the footwell behind the front seats can occur.

By arranging all parts of the children's Restraint in the backrest is a retrofit of vehicles with the child restraint system cost-saving possible, since only the backrest on Vehicle seat must be replaced.

Advantageous embodiments of the invention Vehicle seat with appropriate training and Embodiments of the invention are in the further Claims specified.

According to a preferred embodiment of the invention, in the rear area of the head restraint A child's airbag housed the headrest cushion. This in the stirrup position of the headrest Frontal air bag automatically inflates prevents Throwing the child's upper body forward and with it Banging the child 's head on the safety catch, what in Extreme cases could lead to head injuries. At less delays like that from a possible Second impact or resulting from an emergency stop, and in which the airbag is not activated, the one of the Head cushion of the head restraint formed large-area safety gear take in the child with the greatest possible security.  

In a further embodiment of the invention Headrest in two swivel positions on the backrest releasably lockable, the one pivot position Head restraint position of the headrest and the other Swivel position the headrest position in the Restraint system. By restricting the Headrest swiveling to only two swivel positions becomes the sensor system that inflates the child's airbag only in the stirrup position of the headrest should trigger, technically significantly simplified.

According to an expedient embodiment of the invention the headrest of the headrest on the swivel arms adjustable in height, and in a plurality of Sliding positions releasably lockable. Through this Movability of the head cushion relative to the swivel arms the headrest can not only adjust the height of the head cushion adjusted the body size of the normal size seat user but also the safety catch for the child like that be set that this is still sufficient On the other hand, it has sufficient freedom of movement is.

In an expedient embodiment of the invention the locking of the headrest in both of them Swivel positions or the locking of the head cushion in one of his many displacement positions using spring force and their cancellation by manual operation, which preferably via a Bowden cable on the locking or Latching device works. This will also help with a crack the Bowden cable does not lock or latch canceled and security not reduced unnoticed. Of course it is possible instead of spring force the locking and locking by electrical,  electromagnetic, hydraulic or pneumatic Mechanisms. Will be between the head cushion and both swivel arms each have such a lock or Locking provided, so are the actuators coupled so that by manual operation one of the actuators both locks or Latches are released.

According to a preferred embodiment of the invention the forced coupling between the headrest and the Upholstery legs executed so that the pivoting movement of the Upholstery legs only after a defined swivel path Swivel arms of the headrest are used. This is especially for Vehicle seats with a foldable backrest are advantageous since it this makes it possible to fold the backrest Swivel the headrest so far that it is in the footwell can swivel in without the pad legs extend and load or fold the backrest prevent.

This forced coupling is particularly easy to do Realize swivel or carrier bracket if the Upholstery leg according to an advantageous embodiment of the Invention near its end facing the swing arms a pivot axis extending transversely to the seat depth on the Backrest are pivotally attached and at Swiveling the headrest upward Can perform pivoting movement. The empty swiveling path of the Headrest, d. H. the swivel path of the headrest without it connected pivoting movement of the upholstery legs achieved in that the hinge axis of each swivel arm Headrest assigned, fixed to the swivel arm Swivel bracket parallel to the swivel axis of the swivel arm runs and an arcuate slot in the swivel bracket  is provided in which on the associated cushion leg attached pin is slidably guided. The slot length is dimensioned so that the Swivel arm the pin for swiveling the Upholstery leg strikes the slot end.

In a preferred embodiment of the invention provided that the middle part of the backrest cushion a Has a cushion recess in which one is made up of two approximately the same size upholstery parts Cushion body lies flush with the backrest cushion. The lower upholstery is around one near its the seat cushion facing lower end arranged across the seat depth aligned pivot axis swivels on the backrest held. Both upholstery parts are on your in the Upholstery recess inset along the back Butt edges articulated so that they are 180 ° are hinged on top of each other. Through this constructive The child restraint can take measures different ages and body sizes to be needed. For small children (up to about 5 years) the cushion body is folded out of the cushion recess, so that the lower cushion part on the seat cushion of the Seat cushion comes to rest. Then the upper pad part folded down by 180 ° onto the lower upholstery. The way folded upholstered body forms the seat for the child, which is placed so that head pads and swivel arms in the stirrup position of the headrest in the correct one Body area of the smaller child. In the back area of the child results from the folded out Upholstered body a distinctive shell contour that the child in the event of a side impact, even better lateral support the head area offers what especially for small children what is important is their head in relation to the body  is difficult. This seating aid can be used as long as as long as the upper area of the backrest still Can take over the headrest position for the child. Larger Children (up to about 12 years) sit directly on the seat cushion of the seat cushion. The distinctive shell contour of the Upholstery is then no longer available, which at older children are no longer necessary.

According to an expedient embodiment of the invention is on the end of the upper part facing away from the lower upholstery part Upholstered part a safety hook for attaching the Upholstered body arranged in the cushion recess. This Safety hook prevents the upholstery body from slipping during normal use of the vehicle seat.

In an expedient embodiment of the invention provided that at the bottom of the cushion recess washable sheet is inserted, which after swiveling the lower Upholstery part on the seat cushion of the seat cushion and Fold down the upper part of the upholstery to the back of the lower cushion part over the top of the upper Upholstery part is pulled and the latter completely covers. This washable and exchangeable sheet protects the Upholstered body against all types of dirt.

The invention is based on one shown in the drawing Embodiment described in more detail below. It demonstrate:

Fig. 1 is a schematic illustration of a vehicle seat having a child restraint in a side view,

Fig. 2 is a front view of the backrest of a constructive embodiment of the vehicle seat with a child restraint device,

Fig. 3 is a side view of the seat back in Fig. 2,

Fig. 4 shows a section along the line IV-IV in Fig. 2,

Fig. 5 is a section along the line VV in Fig. 2,

Fig. 6 shows a section along the line VI-VI in Fig. 3,

Fig. 7 is a section along the line VII-VII in Fig. 3,

Fig. 8 is a section along the line VILI-VIII in Fig. 2,

Fig. 9 shows a section along the line IX-IX in Fig. 2.

The vehicle seat schematically outlined in FIG. 1 in a known manner has a seat cushion 10 with seat cushion 11 and a backrest 12 with backrest cushion 13 . The backrest 12 is preferably pivotable on the seat cushion 10 about a pivot axis extending transversely to the seat depth, so that it can be pivoted for the purpose of enlarging the luggage space, the backrest cushion 13 being placed on the seat cushion 11 . The backrest 12 carries a height-adjustable headrest 14 . A restraint device 15 for a child carried on the seat is integrated in the vehicle seat, which is formed from parts of the backrest 12 and can be swung out of it when in use. Part of this retaining means 15 is a child front and side U-shaped enclosing catch bracket 16 which is pivotally supported on the backrest 12 14 of the headrest 14 and the supporting device is formed, for which purpose the head support and is pivoted in front of the seated child, such as this is indicated schematically by arrow 17 in Fig. 1. The restraint device 15 also includes two cushion legs 28 which can be swung out laterally from the backrest cushion 13 and a cushion body 20 which can be folded out of the backrest cushion 13 and has the two cushion parts 21 , 22 which are folded open onto one another. The pivotability of the upholstery legs 28 and the upholstery parts 21 , 22 is again indicated by arrows 19 or 23 and 24 . In Fig. 1, the unfolded, in the use position child restraint 15 is shown hatched for better clarity. Details of the structural design of the restraint device 15 on the vehicle seat are explained below with reference to the structural design shown in FIGS. 2-9 in various views and sectional views.

As can be seen from the front view of the backrest 12 shown in the area of a child-restraint device 15 in FIG. 2, the backrest cushion 13 is divided into a central part 25 and two laterally and symmetrically adjacent, with the central part 25 approximately flush side bolsters 26 . One side cheek 26 is composed of a shorter upper cheek part and a longer lower cheek part, the upper cheek parts being formed by appropriately padded swivel arms 27 of the headrest 14 and the lower, longer cheek parts being formed by the padded legs 28 . The pivot arms 27 of the headrest 14 are each pivotally attached to the backrest 12 about a pivot axis 29 extending transversely to the seat depth and the cushion legs 28 about a pivot axis 30 running parallel thereto. The pivot axis 29 of the pivot arms 27 is close to the lower end of the pivot arms 27 facing the cushion legs 28 and the pivot axis 30 of the cushion legs 28 is close to the upper end of the cushion legs 28 facing the pivot arms 27 (cf. also FIG. 1). A head cushion 31 is fastened between the two swivel arms 27 and is displaceable relative to the swivel arms 27 , so that there is a possibility of height adjustment for the headrest 14 . For this purpose, as is illustrated in FIG. 4, the head cushion 31 is laterally attached to two guide rods 32 , and the guide rods 32 are slidably guided in a guide shaft 33 formed in each swivel arm 27 . The guide rods 32 are hollow, and in at least one guide rod 32 a latching device 34 is disposed, with which the guide rod 32 can be locked in a plurality of different height positions of the head restraint 14 on the guide shaft 33rd For this purpose, the guide shaft 33 has a latching hole strip 35 and the latching device 34 has a latching hook 36 which is pivotably mounted in the guide rod 32 and can engage under the spring force of a latching spring 37 in one of the latching holes in the latching hole bar 35 . The locking device 34 is unlocked via a Bowden cable 38 , which is connected to an actuation button 39 . The actuation button 39 is accessible laterally on the head cushion 31 . When the actuation button 39 is pressed in, the latching hook 36 is pivoted counter to the spring force of the latching spring 37 , counterclockwise in FIG. 4, and is thereby lifted out of the latching perforated strip 35 . The guide rod 32 can now be moved relative to the guide shaft 33 . If on each guide shaft 33 such a locking hole strip 35 and in each guide rod 32 such a locking device 34 with locking hook 36 , which can be pivoted via a Bowden cable 38 by an actuating button 39 , the locking devices 34 are coupled to one another in such a way that the actuation one of the two actuation buttons 39 simultaneously removes both latches between the guide rods 32 and the guide shafts 33 .

The headrest 14 , which is held with its two pivot arms 27 about the pivot axis 29 on the backrest 12 , is releasably locked in two pivot positions on the backrest 12 . The one pivot position of the headrest 14 shown in FIGS. 2-5 corresponds to the head restraint position thereof, and the other pivot position of the headrest 14 , which is hatched in FIG. 1, corresponds to the safety bar position in which the headrest 14 is the U-shaped safety bracket mentioned above 16 of the restraint device 15 forms. In both swivel positions, the headrest 14 is fixed to the backrest 12 by means of at least one locking device 40 which is effective between at least one swivel arm 27 of the headrest 14 and the backrest 12 . The locking device 40 is shown in detail in FIGS. 6-8. As can be seen from FIG. 7, the locking device 40 has a locking hook 41 articulated on the swivel arm 27 , the hinge axis 42 of which is aligned parallel to the swivel axis 29 of the swivel arm 27 . As shown in FIG. 8, the locking hook 41 is loaded by a leg spring 43 which, in a pivoted position of the headrest 14, the locking hook 41 into a locking hole 44 or 45 (reduced in FIG. 9) in a sheet metal frame 46 of the backrest 12 swings in. The sheet metal frame 46 of the backrest 12 can be seen in broken lines in FIG. 3 and is shown in sections in FIGS. 7 and 9. The sheet metal frame 46 also receives the swivel axes 29 and 30 of the swivel arms 27 and upholstery legs 28 . A Bowden cable 47 , which is guided to an actuating unit 48 , engages on the locking hook 41 to unlock it ( FIGS. 3 and 6). The actuation unit 48 is integrated in the swivel arm 27 and ends flush with the cushion of the swivel arm 27 with an actuation plate 49 . The actuating plate 49 is fastened to a rocker 50 which is held pivotably about an axis 51 . The Bowden cable 47 is attached to the rocker 50 . If manual pressure is exerted on the actuating plate 49 , the rocker 50 swivels clockwise in FIG. 6, the Bowden cable 47 being pulled. As a result, the locking hook 41 is pivoted clockwise in FIG. 7 and lifts out of the locking hole 44 . The lock between the swivel arm 27 and the backrest 12 is released and the headrest 14 can be pivoted from its head restraint position into its stirrup position and vice versa, in which the locking hook 41 automatically engages in the associated locking hole 45 or 44 under the force of the leg spring 43 and the headrest 14 locked again reliably. If, as described above, a locking device 40 is provided between each swivel arm 27 and the backrest 12 , the actuation units 48 are connected in such a way that the actuation of one of the two actuation plates 49 in the swivel arms 27 releases the locking of both swivel arms 27 .

To simplify the handling of the child restraint device 15 , the headrest 14 is forcibly coupled to the two cushion legs 28 in such a way that pivoting the headrest 14 out of its head restraint position (FIGS . 2-5) into its safety bar position (hatched in FIG. 1) is upward directional pivoting movement of the two cushion legs 28 about their pivot axis 30 and conversely, a pivoting movement of the headrest 14 into its head restraint position leads to a pivoting back of the cushion legs 28 . The forced coupling is designed so that when the headrest 14 is pivoted, the pivoting of the cushion legs 28 from the backrest cushion contour only begins after a pivoting path of the pivot arms 27 . For the positive coupling of the pivoting movement of the headrest 14 and the pivoting movement of the pivoting arms 27 , as shown in FIG. 9, a catch or pivoting bracket 52 is articulated on each pivoting arm 27 of the headrest 14 , the axis 53 of which is aligned parallel to the pivoting axis 29 of the pivoting arm 27 . The swivel bracket 52 has an arcuate slot 54 , in which a pin 55 attached to the associated cushion leg 28 is slidably guided. The length of the slot 54 is such that after a defined empty pivoting path of the pivot arm 28, the pin 55 strikes the end of the slot and now, when the headrest 14 is pivoted further, the cushion leg 28 in FIGS. 3 and 4 pivots counterclockwise about the pivot axis 29 . When the headrest 14 falls into its safety catch position, in which it is automatically locked on the backrest 12 , the headrest 14 , which now fulfills the function of the safety catch 16 , and the two upholstery legs 28 assume the positions shown hatched in FIG. 1. The cushion legs 28 provide good lateral support for the child in the lower body area, the swivel arms 27 provide good lateral support for the child in the head area, and the wide and large-area head cushion 31 protects the child in the event of a frontal impact in the chest area. As shown in FIGS. 1 and 5, in the head restraint position of the headrest rear area of the head cushion 31, a child airbag 56 is accommodated, which automatically inflates when the vehicle experiences high decelerations, such as occur in the event of a frontal impact, and prevents the head of the Hits the child's head cushion 31 . If the vehicle decelerates to a lesser extent, as occurs from a possible second collision or during full braking, the airbag 56 is not activated and the head cushion 31 is sufficient to intercept the child without injury.

The restraint device 15 described above can be used for larger children up to approx. 12 years who are seated on the seat cushion 11 of the seat cushion 10 and are supported and intercepted in the correct body areas by the cushion legs 28 and the headrest 14 acting as a U-shaped safety catch 16 . In order to be able to use the restraint device 15 also for smaller children up to about 5 years old, as can be seen from FIGS . 2 and 5, a cushion recess 57 is provided in the middle part 25 of the backrest cushion 13 , in which the cushion body 20 with its upper cushion part 21 and the approximately equally long lower cushion part 22 , flush with the backrest cushion 13 , lies. The lower cushion part 22 is held on the backrest 12 so as to be pivotable about a pivot axis 58 oriented transversely to the seat depth. The pivot axis 58 is arranged near the lower end of the lower cushion part 22 facing the seat cushion 10 on its rear side. The two upholstery parts 21 , 22 are articulated on their rear side lying in the upholstery recess 57 along their abutting rear edges in such a way that they can be folded apart by 180 °. The end of the upper upholstery part 21 facing away from the lower upholstery part 22 is fastened to the backrest upholstery 13 by means of a securing hook 59 , so that slipping of the upholstery body 10 in the upholstery recess 57 is prevented. As hatched in Fig. 1, to carry the toddler up to 5 years on the vehicle seat, the cushion body 20 is pivoted out of the cushion recess 57 so that the lower cushion part 22 rests on the seat cushion 11 of the seat cushion 10 . Then the upper cushion part 21 is opened onto the back of the lower cushion part 22 . To protect the folded-out upholstery body 20 against dirt, there is a washable sheet 60 at the base of the upholstery recess 57 between it and the upholstery body 20 , which is now spread over the surface of the upper upholstery part 21 which is opened on the lower upholstery part 22 so that it covers the upper upholstery part 21 completely covers and thus effectively prevents contamination of the upper cushion part 21 by the child. For washing, the sheet 60 is designed to be removable from the cushion recess 57 . The depth of the cushion recess 57 and the two cushion parts 21 , 22 is chosen so that the seat aid formed by the two folded cushion parts 21 , 22 provides a toddler with such a booster seat that the safety catch 16 surrounds the child in the correct areas of the body. Due to the cushion body 20 folded out of the cushion recess 57 , a pronounced shell contour results in the back area of the toddler, as a result of which the lateral support is significantly improved, especially for smaller children.

Claims (16)

1.Vehicle seat with a seat cushion carrying a seat cushion and a backrest having a backrest cushion, with a restraint device which can be moved out of the seat contour and formed from parts of the seat for a child carried on the seat and with a height-adjustable headrest consisting of two which can be pivoted on the backrest Swivel arms and a head cushion fastened between them, which after pivoting out of a head restraint position suitable for adults above the backrest forms a U-shaped safety catch of the restraint device, characterized in that the backrest cushion ( 13 ) into a middle part ( 25 ) and two thereon laterally adjacent, with the middle part ( 25 ) flush side cheeks ( 26 ) is divided, each composed of a shorter upper cheek part and a longer lower cheek part, that the upper cheek parts from the correspondingly padded swivel arms ( 27 ) of the headrest ( 14 ) are formed in such a way that the lower cheek parts are formed by upholstered legs ( 28 ) which are movably held on the backrest ( 12 ) in such a way that they protrude outward beyond the surface of the central part ( 25 ) are, and that the headrest ( 14 ) and the upholstery legs ( 28 ) are positively coupled to one another in such a way that the pivoting movement of the headrest ( 14 ) causes an extension or retraction movement of the upholstery legs ( 28 ). 2. Seat according to claim 1, characterized in that a child's airbag ( 56 ) is accommodated in the rear region of the head cushion ( 31 ) of the headrest ( 14 ) in the head restraint position. 3. Seat according to claim 1 or 2, characterized in that the headrest ( 14 ) in two pivot positions on the backrest ( 12 ) is releasably lockable, of which one pivot position, the head restraint position of the headrest ( 14 ) and the other pivot position, the stirrup position Headrest ( 14 ) in the restraint ( 15 ) sets. 4. Seat according to one of claims 1-3, characterized in that the head cushion ( 31 ) of the headrest ( 14 ) between the swivel arms ( 27 ) slidably attached and releasably locked in a plurality of displacement positions. 5. Seat according to claim 3 or 4, characterized in that the locking or latching causes by means of spring force and can be canceled manually by actuating an actuating member (actuating button 39 , actuating plate 49 ). 6. Seat according to claim 5, characterized in that for locking the headrest ( 14 ) on at least one swivel arm ( 27 ) a locking hook ( 41 ) is provided which in each of the two pivot positions of the headrest ( 14 ) with a locking hole ( 44, 45 ) interacts in the backrest ( 12 ). 7. Seat according to claim 6, characterized in that the locking hook ( 41 ) is articulated on the swivel arm ( 27 ), its hinge axis ( 42 ) being aligned parallel to the swivel axis ( 29 ) of the swivel arm ( 27 ), that the locking hook ( 41 ) is loaded by a leg spring ( 43 ) and that for lifting the locking hook ( 41 ) from the locking hole ( 44 , 45 ) on the locking hook ( 41 ) a Bowden cable ( 47 ) engages, which is arranged with a on the swivel arm ( 27 ), preferably one over an actuating plate ( 49 ) having a pivotable rocker ( 50 ), manual actuating unit ( 48 ) is connected. 8. Seat according to one of claims 4-7, characterized in that the head cushion ( 31 ) is fastened to two guide rods ( 32 ), that the guide rods ( 32 ) in a respective in each swivel arm ( 27 ) formed guide shaft ( 33 ) slidably are guided and that the locking of the headrest ( 14 ) is effected by at least one locking device ( 34 ) effective between a guide rod ( 32 ) and a guide shaft ( 33 ). 9. Seat according to claim 8, characterized in that the guide rods ( 32 ) are hollow and that the at least one latching device ( 34 ) has a latching hook ( 36 ) which is arranged pivotably in the guide rod ( 32 ) and which is connected to an associated guide shaft ( 33 ) arranged locking hole strip ( 35 ) interacts. 10. Seat according to claim 9, characterized in that the latching hook ( 36 ) is held by a latching spring ( 37 ) in engagement with the latching hole strip ( 35 ) and that for lifting the latching hook ( 36 ) from the latching hole strip ( 35 ) a Bowden cable ( 38 ) engages on the locking hook ( 36 ), which is connected to an actuating button ( 39 ) which is accessible from the side on the head cushion ( 31 ). 11. Seat according to one of claims 1-10, characterized in that the upholstery legs ( 28 ) near their pivot arms ( 27 ) facing end about a transverse to the seat depth pivot axis ( 29 ) on the backrest ( 12 ) are pivotally attached and perform an upward swiveling movement when swiveling the headrest ( 14 ). 12. Seat according to claim 11, characterized in that the positive coupling between the headrest ( 14 ) and upholstery legs ( 28 ) is carried out so that when pivoting the headrest ( 14 ) into its catch bracket position, the pivoting movement (empty swivel path) of the upholstery legs ( 28 ) only after uses a predetermined swivel path of the swivel arms ( 27 ). 13. Seat according to claim 12, characterized in that on each swivel arm ( 27 ) of the headrest ( 14 ) a swivel bracket ( 52 ) is articulated, the hinge axis ( 53 ) parallel to the swivel axis ( 29 ) of the swivel arm ( 27 ) that in Swivel bracket ( 52 ) an arcuate slot ( 54 ) is provided, in which a pin ( 55 ) attached to the associated upholstery leg ( 28 ) is displaceably guided, and that the slot length is dimensioned such that after the empty swivel path of the swivel arm ( 27 ) the pin ( 55 ) for pivoting the cushion leg ( 28 ) at the slot end. 14. Seat according to one of claims 1-13, characterized in that the central part ( 25 ) of the backrest cushion ( 12 ) has a cushion recess ( 57 ) in which an upper and an approximately equal lower cushion part ( 21 , 22 ) together translated cushion body (20) is flush rests with the backrest cushion (13), that the lower upholstered member (22) disposed about a facing near its said seat cushion (10) lower end, oriented transversely to the seat depth pivot axis (58) pivotally mounted on the backrest (12 ) is held and that the two upholstery parts ( 21 , 22 ) are articulated on their rear side lying in the upholstery recess ( 57 ) in such a way that they can be folded open by 180 °. 15. Seat according to claim 14, characterized in that at the end of the upper cushion part ( 21 ) facing away from the lower cushion part ( 22 ) a securing hook ( 59 ) for fastening the cushion body ( 20 ) lying in the cushion recess ( 57 ) in the cushion recess ( 57 ) is arranged. 16. Seat according to claim 14 or 15, characterized in that at the bottom of the cushion recess ( 57 ) there is a preferably washable sheet ( 60 ) which, after pivoting out the cushion body ( 20 ) from the cushion recess ( 57 ) over the top or front of the upper cushion part ( 21 ) is pullable and covers the latter completely.