MXPA97006527A - Component seat furniture or similar with a backup and seat adjustment acopl - Google Patents

Abstract

The present invention relates to a seat back component with attached backrest and seat adjustment comprising: a support chassis, a backrest adjustably fastened to the support chassis, a seat adjustably fastened to the support chassis, a connection mechanism between the supporting frame, the backrest and the seat, which comprises a means for synchronous adjustment of the backrest and the seat, in a manner that causes the backrest to execute a backward and downward tilt movement superimposed in relation to the supporting frame from a higher vertical seating position, towards a lower extended reclined position, and the seat performing a slight sliding and lifting motion superimposed from the seating position to the reclined position, wherein a pivot shaft is provided around which the backrest executes the movement of inclination backwards and downwards, as a movement essentially of pi Voting around the pivot axis, which is in front of the backrest and above the seat within an angle formed between the backrest and the seat, and wherein the pivot axis is a virtual axis that results from the connection mechanism comprising a plurality of connecting levers that produce the pivotal movement of the back

Description

COMPONENT SEAT FURNITURE OR SIMILAR WITH A COUPLED BACK AND SEAT ADJUSTMENT BACKGROUND OF THE INVENTION FIELD OF THE INVENTION The invention relates to a seat furniture component or the like, especially an upholstered furniture component with an attached backrest and seat fit. It also covers suitable reclining furniture, for example, an upholstered recliner with an adjustable height back or a corresponding hospital bed. Particularly, the invention relates to a furniture component with a support chassis, a backrest adjustably attached to the support chassis, a seat adjustably attached to the support chassis, an adjustment mechanism between the support chassis, the backrest and the seat, which achieves the synchronous adjustment of the backrest and the seat, the backrest by executing a superimposed backward tilt and a reduction movement from the highest straight position, i.e. the seating position, to the lowest extended position, i.e. the reclining position , in relation to the support chassis, the seat executing a slight movement from the seating position towards the reclining section, preferably a superimposed sliding and lifting movement, and preferably being provided with a restoring spring.

DESCRIPTION OF THE RELATED TECHNIQUE Various comfortable and variously complex furnishing components are known in the art (armchair, upholstered armchair, rocking chair, seats for truck, train and aircraft, reclining furniture with height adjustable rear part), especially upholstered furniture components, in which the adjustable Backrest and seat adjustment are coupled. For example, published International Application O / 25452 discloses a chair with a reclining backrest of the type to which the teachings of this invention are applicable and provides a good aspect of the prior art generally known. Firstly, in the seat furniture component described in the Applied Application WO 95/25452 (Figures 1 and 2), the backrest forms an angularly rigid unit with the seat, which is attached to a support frame in order to pivoting around an axle located under the seat, so that the backrest tilts back and down when tilted back towards the reclining position, while the rear end of the seat swings down and the front end tilts towards above. This is usually done against the force of a reset spring. Here, the angularly rigid connection of the backrest and seat adjustment is disruptive, and therefore, there is no extended position of the backrest and seat. In addition, it is disruptive since the front edge of the seat moves considerably upward in the reclining position, this is not particularly beneficial for the user's legs. An alternative construction of the seat furniture component shown in the application WO 95/25452 (Figures 3 and 4) is a relatively common one, wherein the support chassis is made of the frame type. The backrest is pivotally connected to the rear of the frame-like support chassis at a considerable distance above the connection point of the backrest to the rear edge of the seat. The rear edge of the seat in this way is supported by means of backing on the support chassis. On or near the front edge, the seat is guided in a sliding guide, which only has a slightly upward inclination, so that the front edge of the seat moves forward, but only slightly in the transition from the seat position. to the reclining position.

In the aforementioned system, a user can move relatively easily and without extending a large amount of force towards the different positions between the seating position and the reclining position by changing his body weight. Usually, it is necessary to use additional braking means to be able to maintain a certain desired position, or balance spring means. A disadvantage in the seat furniture component results from the pivoting connection of the backrest and the seat rigidly at the apex of the angle of the two components. The connection of the two components is structurally simple, but the two components generally carry upholstered supports. The upholstered eupficiee of the upholstered supports used by the user, are thus slightly above the seat and in front of the backrest and thus a little above and in front of the pivot axis between the backrest and the seat. This results in the fact that, in the transition from the seating position to the reclining position, the upholstered supports move away from each other; this results in a "shirt pulling effect", in which the user perceives a discomfort. Another problem which is itself the result of the aforementioned pivot connection, is that a "hole" is formed in the area of the pelvis / back at the vertex of the angle in the transition from the seating position to the position reclining. This "hole" is disruptive when it is too large, since the area of the pelvis / body can no longer be properly supported in the reclining position. Finally, the union of the seat to the front edge must be done carefully, * so that a greater pressure in the user's knees does not occur in the transition from the seat position to the reclining position. Attempts have been made in the prior art to eliminate this "sleeve pulling effect" by providing a connection mechanism between the backrest and the seat, in the area of the trailing edge or the lower edge, which places the shaft of the connection pivot between the backrest and the seat rigidly, where the surfaces of the two upholstered supports abut one another in the seating position. This is done through fins, which project from the respective frame on the edge side and which are joined to the pivot with each other only at their free ends (Figures 5 and 6 of WO 95/25452). Analysis of this known seat furniture component has shown that, as before, the "jacket pull effect" is noticeable when a relatively extended reclining position is desired. Also, the "hole" in the pelvic / back area is too big. Finally, the prior art embodiment results in a major elevation of the front edge of the seat. This may be acceptable for a seat with support for the feet, but this is not the case for a seat furniture component of the type under consideration, which generally has a support for the folding foot.

BRIEF DESCRIPTION OF THE INVENTION A primary object of the invention is to modalize and develop seat or similar movable components of the type described above with a backrest and seat adjustment, so that the "jacket pull effect" becomes as small as possible or is completely eliminated. The above object is achieved in a seat furniture component or the like, especially an upholstered furniture component with an attached backrest and aeration seat, having a support chassis, an adjustable backrest attached to the support chassis, a seat adjustably attached to the chassis of support, a mechanism of connection between the support frame, the backrest and the seat, which produces a synchronous adjustment of the backrest and the seat, the backrest executing a superimposed backward tilt and a reduction movement from the highest straight position , ie the seat position, towards the lowest extended position, ie the reclining position, relative to the support chassis, the seat executing a slight movement from the seat position towards the reclining poem, preferably a sliding movement and of lifting superimposed and preferably ee provides a replacement reeorte, the backrest executing a tilt towards back and a reduction movement through a movement essentially pivoting about a pivot axis, which is within the angle of the backrest and the seat opposite the backrest and above the seat. It has been analyzed that, in the seating position, it is inherent in this seat furniture component that an individual when sitting correctly is always rigidly in the same position on the seat with his hips. When exactly in this position, of course it depends on different influencing factors, for example, the weight of the upholstered item, the weight of the individual, his size of the body and development, woman or man. However, for the most part, it can be established that the fulcrum of the body of the ueuario will always be located in the relatively straight area above the seat and in front of the backrest. Proceeding from the above-explained analysis, it was then analyzed as a change in the length on the surface of the upholstered support on the backrest relative to the fulcrum of the user's hip which can be avoided in the transition from the seat to the reclining position. This change in length is the cause of the "shirt pulling effect" already explained. Of course, the user remains seated in the seat in the transition from the seating position to the reclining position, does not slide forward and backward, consequently, an effort must be made so that the user's back on the surface of the support Backrest upholstery does not change its position. Furthermore, it has been obtained that the desired result is achieved when the backrest executes, as a backward tilt and reduction movement, an essentially pivotal movement about the pivot axis, which is within the angle of the backrest and the seat, in front of the backrest and above the seat. This pivot axis is actually the pivot axis for the pivotal movement of the backrest, and not the pivot connection between the backrest and the seat provided in the prior art, which does not exist in the seat furniture component claimed in the invention. . Studies have shown that the pivot axis must be between 70 mm and 180 mm in front of the non-upholstered backrest and between 50 mm and 170 mm above the non-upholstered seat. In this way, the region of the location of the hip fulcrum of a normal user is reached, so that the pivot axis is, as desired, rigidly in the hip fulcrum of a normal user. It is also important that the pivot axis of the backrest be at a distance above or in front of the upholstered surfaces of the upholstered supports, even if, for very soft upholstered supports, optionally due to considerable shrinkage of the user's body, the pivot shaft is occasionally closer to the plane of the upholstered support without load. The teaching of the invention can be achieved in two different ways. The first possibility is that the backrest was attached to the pivot joints attached to the height of the pivot axis of the support chassis. But, structurally, this is not an optimal position since, therefore, the connection points must be physically formed on the support chassis, which are above the air and in front of the backrest. This requires a correspondingly volute support chassis, which, in turn, is not optimal for reasons of design freedom. A second optimum mode in which the connection mechanism produces pivotal movement of the backrest about a pivot axis, which is present virtually. With the connection mechanism, various possibilities can be obtained to effect the pivoting movement of the backrest without a pivot shaft being physically present and to have the preferential axis only virtually present. In this case, the busbar guides are themselves advisable as crankshaft guides. According to the teaching of this invention, it should be considered that the hip fulcrum of a user remains essentially unchanged relative to the seat in the transition from the air position to the reclining position (and vice versa), while, however , according to the teaching of the invention, the seat by itself may change slightly. Without the displacement of the seat, no force can be applied by the user to the structure through weight shifting for purposes of the backrest and seat fit adjustment. When the seat is displaced very slightly in the transition from the seating position to the reclining position, the pivot axis for the seatback can be considered as locally static. If the displacement of the seat is greater, the oscillating axis of the backrest must move by itself, according to the displacement of the seat. Further teaching that the adjustment mechanism be included in the separately sealable coupling frame is of special independent importance. With a correspondingly compact configuration of the adjustment mechanism, which can be achieved in accordance with the invention, this has a great advantage since this special coupling frame can be applied as a part that is sold independently. These and other objects, aspects and advantages of the present invention will be apparent from the following description taken in conjunction with the appended drawings in which, for purposes of illustration only, they show a single embodiment according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a highly schematic side view of a seat furniture component, the seating position shown by solid lines, and the reclining position by dotted line; Figure 2 shows the adjustment mechanism of the seat furniture component in a larger view (relative to Figure 1) in the seating position; Figure 3 is a plan view of the adjustment mechanism of Figure 2; Figure 4 shows a front elevation view of the adjustment mechanism of Figure 2, ie a view of the left part of Figure 2; Figure 5 shows a seat furniture component with upholstered supports illustrated by a dotted line, however without an external support chassis in the seating position; Figure 6 shows the seat furniture component of Figure 5 in a seat position slightly tilted backwards; Figure 7 shows the seat furniture component of Figure 5 in a slightly raised reclined position; and Figure 8 shows the seat furniture component of Figure 5 in the fully recumbent poem.

DETAILED DESCRIPTION OF THE PREFERRED MODALITY The air or furniture furniture component, which is shown in the drawings and which is schematically explained in relation to Figure 1, is generally, and in accordance with a preferred embodiment, an upholstered furniture component. However, this does not mean that, fundamentally, it can not be developed without an upholstered support, for example, as a furniture component of plastic or wood seats. As detailed in the above, the invention relates to movable seat components in the more general meaning of the term; therefore, any components with seat and back adjustably coupled for positional adjustment are encompassed.

Consequently, such seat furniture components can be, for example, armchairs, upholstered armchairs, rocking chairs, as well as truck, train and aircraft seats, sofas of two or three seats and optionally, also reclining furniture on which it is possible to sit, such as hospital beds that have an adjustable height backrest or corresponding upholstery recliners. Figure 1 shows, first of all, a seat furniture component, which has a backrest and seat fit coupled with a support frame 2 with which the seat furniture component is held on a floor 1 and with arms 3 strongly upholstered on the support chassis 2. The backrest 4 and the aerator 5, accordingly, are adjustably attached to the support chassis 2. Figure 1 shows the backrest seat position 4 and the seat 5 through solid lines, while that the reclining position of the backrest 4 and the seat 5 is represented in dotted lines. For a better understanding, reference should be made to Figure 2 and Figures 5 to 8, which show different positions. First, the seat furniture component has an adjustment mechanism 6 between the support frame 2, the backrest 4 and the seat 5, which achieve the synchronous adjustment of the backrest 4 and the seat 5.

The backrest 4 executes a backward movement of inclination and reduction superimposed relative to the support chassis 2 from a higher straight position, ie, the sitting position, towards the lower extended position, i.e. the reclining position . This is clearly illustrated in Figure 1 and otherwise described in detail in the prior art. The seat 5 executes only a slight movement from the seating position to the reclining position, especially a much lighter movement than the backrest 4 in the preferred embodiment shown, as is also known in the prior art, with a sliding superimposed movement and elevation. The movement of elevation of the seat 5, in the transition from the seating position to the reclining position, leads to the result that the displacement of the peeo of the ueno in the attempt to sit straight again in the air poem is used to compress the seat 5 downwards by the weight higher of the user and in this way again place the backrest 4, optionally supported by the reset spring. This does not work at all without any displacement of the seat 5 on this type of seat seating components with a backrest and seat adjustment coupled, which is obvious. The hip fulcrum 7 of the body of an average seat individual, shown in Figures 5 to 8, is logically in a certain position in front of the backrest 4 above the seat 5 when sitting correctly. As explained in the Background section of this description, the fulcrum of the hip 7 is displaced only a little or nothing in relation to the seat 5 in the tranceition of the seating position to the reclining position. As noted in the foregoing, a primary object of the present invention is to achieve a correspondingly small displacement in relation to the reefer 4 as well. Here, it is provided that the backrest 4 executes, as the movement of backward tilt and reduction, essentially a pivoting movement about the pivot axis S, which lies opposite the backrest 4 and above the seat 5 within the formed angle by the backrest 4 and the seat 5. The pivoting movement of the backrest 4 is illustrated by a double arrow, which shows the two possible directions of movement. In this embodiment, the pivot axis S coincides with the hip fulcrum 7. This is optimal according to the teaching of this invention. However, in reality since there are many different users, only an approximation of the hip fulcrum position 7 can be used for the position of the pivot axis S. Therefore, it is provided that the pivot axis S is between 70 mm and 180 mm in front of the non-upholstered backrest 4 and is between 50 mm and -170 mm above the non-upholstered seat 5. It has been explained in the foregoing that, for a more dramatic displacement of the seat 5, it is possible that the axis oscillating S, by itself, moves according to the displacement of the seat 5. This displacement is relatively minor compared with the displacement of the backrest 4, but it perfects the movement of the furniture furnishing component. In summary, the result is that the "shirt pull effect" mentioned in the foregoing, essentially, no longer occurs in this seating furniture component. At the same time, the displaceability of the backrest 4 and the seat 5 in the transition from the seat position to the reclining position, and vice versa, is possible with extraordinary ease, without a greater force gaeto. It has already been pointed out in the Background part of the description that there are two possibilities to implement the pivot axis S for the backrest 4. The first possibility does not explain in detail; it is applied to the latter that the backrest 4 is attached to the pivot joints joined at the height of the pivot shaft S to the support frame 2. This aspect is simple in structural terms, but has two major defects. In the first place, it is not possible to achieve a displacement capacity of the S axis according to the displacement of the seat, which is desirable to optimize teaching. Second, the oscillating seals, which then necessarily are present above the seat 5 on the support chassis 2, are disruptive. The support frame 2 then needs a size that limits the design freedom of the designer of the seat furniture component in an undesirable way. Therefore, in this embodiment, it is preferred that the connecting mechanism 6 executes the pivoting movement of the backrest 4 around the pivot axis S which, by itself, is only virtually present. The virtually present pivot axis S can be handled enormously freely through an appropriately skilful configuration of the connection mechanism 6. As already mentioned in the foregoing, the connection mechanism 6 can be configured in different and diverse ways. For the virtual implementation of the pivot axis, generally, a crankshaft guide makes a sense. This can be done in this case. A guest of another design solution is advisable. But, the embodiment shown implements a connection rod coupling since the connection mechanism 6, here, has a plurality of linker link bars. In particular, it is preferred, as explained using Figure 2, that the backrest 4 be connected through two back-up connection levers 8, 9 for a main connection lever 10 which, in turn, is attached to a pivot on the support frame 2..The backup connection levers 8, 9 together with the backrest 4 and the connection points 4a, 4b separate as well as the separate connection points 10a, 10b on the main connection rod 10, they can form an irregular rectangle. However, what is shown is characterized by the fact that the reefer connection levers 8, 9 with the backrest 4 and the main connection rod 10 form a parallelogram of the connection lever. Figures 5 to 8 show that special movement can be done with this form of parallelograms. Other effects can be obtained with a different constellation of connection point. In addition, in this embodiment, the seat 5 is attached to a connection lever attached to the support chassis 2 at a support chassis coupling point 13 on one side, especially on the main connection lever 10, and the other side to the support chassis 2 at the support chassis coupling point 17 at a distance from the main connection lever coupling point 11, through the seat connection lever 12. Preferably, it is provided that the connection line between the main connection lever coupling point 11 and the support chassis coupling point 13 of the main connection lever 10 runs only parallel to the seat connection lever 12. Eeta special configuration produces the movement of air 5, which is shown in Figures 5 to 8, so that seat 5 is raised only very lightly and pushed forward. The movement coupling of the backrest 4 and the seat 5 are presented not only through the main connection lever 10, but also through the seat 5 which is coupled to the back-up connection lever 9 through the connection lever linker 14. The linkage connecting lever 14 establishes an unambiguous session of the inclined position of the seat 5 to the backrest 4, which otherwise depends on how the individual is placed on the seat 5. In the embodiment, it is provided that the connection lever The linker 14 is attached to the air 5 at a diet from the main connection lever coupling point 11 and from the seat connection lever coupling point 15. The mode shown in Figure 2 illustrates that the lever coupling point connecting link 16 on air 5 is clearly above the main connection lever coupling point 11 and a considerable lateral diet from the seat connection lever coupling point 15, and also above it. Actually, a parallelogram of connecting lever is formed from the lower part of the right backup connecting lever 9, the main connecting lever 10, the connecting connecting lever 14 and the seat 5. Therefore, the seat 5 it is coupled to the backrest 4 through two coupled lever parallelograms. Figures 3 and 4 illustrate that in the embodiment, for reasons of absorption and transfer of force, individual or total connection levers are made as double connection levers. The views in Figures 3 and 4 also illustrate how different connection levers lie in different planes in symmetric pairs. The drawing does not show a replacement spring, which is known from the prior art, and which is implemented in the invention being integrated into the connection mechanism 6. It is especially preferable to integrate the coupling points of the support frame 13 and 17 in the support chassis mounting vehicle 18, which is made here of a mounting plate. This mounting plate 18 is also made as a double plate, as in FIG. 3 and 4 is indicated. The coupling point of support chassis 13, 17 is pushed so close to each other that an arrangement in a very close proximity can be achieved; this allows the concentration on the mounting plate 18.

As clearly shown in Figure 2 and Figures 5 to 8, it is provided that all backup coupling points are. integrated in the backrest mounting vehicle 19 and the actual backrest 4 is removably attached to the backrest mounting vehicle 19. Figure 2 shows only the mounting holes 19a for the backrest 4 on the backrest mounting vehicle 19, while Figures 5 to 8 show the backrest 4 mounted thereto. Corresponding applies to the seat 5; therefore, it is maintained that all the seat coupling points 20a are integrated into the seat mounting vehicle 20 and the actual seat 5 is removably attached to the seat mounting vehicle 20. The implementation of the backup mounting vehicle 19 and the air mounting vehicle 20 have a great advantage that the entire connecting mechanism 6 can be used as a universal component for fitting movable components, and, therefore, can be equipped with different backrests 4 and seat 5. Figures 5 to 8 show upholstered supports 21 on the backrest 4 and on the seat 5 by dotted lines. The modality illustrates that, as a result of the innovative construction, a particularly compact design has been obtained. It has been obtained that all the connecting levers and coupling points are close to the apex of the angle between the backrest 4 and the seat 5, specifically in the seating position, preferably over an area of 15 to 40 square cm. The drawing does not show that it is possible for the connecting mechanism 6 to be surrounded by a housing from which only the back-up mounting vehicle 19 and the seat mounting vehicle 20 are projected movably. The special importance of the integrated design of the connecting mechanisms 6 is that, in the seat furniture component of the invention, a greater advantage is obtained with respect to the known seating furniture components through the connection point of the backrest to the chassis of support where it is located, not above the point of connection of the reepaldo al aeiento, but below it. This is also done through a lever mechanism, a reinforcement joint connection achieving an additional superimposed inclination movement of the backrest. The same seat is attached to the pivot near its front edge on the support chassis at a considerable distance from the point of connection of the backrest to the frame of the support. Since this connection point is near the front edge of the seat, the front edge of the seat is raised less than in the known seat components of the prior art, when the seat component is moved from the seat position to the position reclining Finally, Figure 2 shows that the teaching of the invention is implemented in a coupling frame for a seat furniture component where all the support chassis coupling points 10, 17 are integrated in the support chassis mounting vehicle 18, and all the backup coupling points are integrated into the backup mounting vehicle 19, and all the air coupling points are integrated into the seat mounting vehicle 20. This coupling frame is improved through the housing. indicated above from which only the back mounting vehicle 19 and the seat mounting vehicle 20 are movably projected, and which is otherwise equipped with attachment means for attaching the internal support chassis mounting vehicle. to the support chassis 2. To finish, it should be noted that, normally, connection mechanisms 6 are attached to the chassis of support 2, one on the right and one on the left of the backrest 4 and the seat 5 for supporting the backrest 4 and the seat 5 with each other. Furthermore, it should be noted that the sliding and lifting movement of the front edge of the seat 5 can be achieved through a sliding sliding guide or also through a connecting lever displacement guide., as is well known in the prior art. While a single embodiment according to the present invention has been shown and described, it should be understood that the invention is not limited thereto, and is susceptible to numerous changes and modifications known to those skilled in the art. Therefore, this invention is not limited to the details shown and described therein, and includes all changes and modifications as encompassed by the scope of the appended claims.

Claims (20)

1. A seat furniture component with a coupled back and air adjustment, characterized in that it comprises: a support chassis; a backrest adjustably attached to the support chassis; a seat adjustably attached to the support chassis; a connection mechanism between the support chassis, the backrest and the seat, which produces a synchronous adjustment of the backrest and the seat, the backrest executing a backward inclination movement and superimposed reduction in relation to the support chassis from a position of straight higher seat, towards an extended low reclining poem, the seat performing a slight movement from the seating position to the reclining position; wherein a pivot axis is provided around which the backrest executes the backward tilt movement and the reduction, as an essentially pivotal movement about the pivot axis, which is opposite the backrest and above the seat within the angle formed between the backrest and the seat.

2. The seat furniture component according to claim 1, characterized in that the pivot axis is between 70-180 mm in front of a non-upholstered backrest and between 50-170 mm above a non-upholstered seat.

3. The seat furniture component according to claim 1, characterized in that the pivot axis, by itself, moves with a displacement of the seat.

4. The seat furniture component according to claim 1, characterized in that the backrest is joined to the support chassis through joint joints, which are at a height corresponding to that of the pivot axis.

5. The seat furniture component according to claim 1, characterized in that the pivot axis is a virtual axis that results from a connection mechanism which produces the pivotal movement of the backrest.

6. The seat furniture component according to claim 5, characterized in that the connection mechanism comprises a plurality of connection levers.

7. The seat furniture component according to claim 6, characterized in that the connection levers comprise two backup connection levers and a main connection lever; wherein the backrest is attached to the main connection lever through two backup connection levers; and wherein the main connecting lever is pivotally connected to the support chassis.

8. The seat furniture component according to claim 7, characterized in that the reefer connection levers together with the backrest and the main connection lever form a parallelogram of the connection lever.

9. The furniture furnishing component according to claim 7, characterized in that the aeration is attached to the main connection lever attached to the support chassis on one side, and on the other side to the support chassis at a distance from a coupling point of the main connection lever through a seat connection lever.

10. The seat furniture component according to claim 9, characterized in that a connection line between the main connection lever coupling point and the support chassis coupling point of the main connection lever runs rigidly parallel to the lever of seat connection.

11. The furniture furnishing component according to claim 6, characterized in that the aeration is connected to the backup connection lever through a linkage connecting lever.

12. The furniture furnishing component according to claim 11, characterized in that the linkage connecting lever is attached to the seat at a distance from the main connection lever coupling point and from a seat connection lever coupling point.

13. The seat furniture component according to claim 6, characterized in that at least some of the connecting levers are double connection levers.

14. The seat furniture component according to claim 1, characterized in that the support chassis is provided with a number of support chassis coupling points and all the support chassis coupling points are integrated into a vehicle mounting vehicle. support chassis.

15. The seat furniture component according to claim 1, characterized in that all the coupling points for the backrest are integrated into a backrest mounting vehicle to which the backrest is removably attached.

16. The seat furniture component according to claim 1, characterized in that all the coupling points for the seat are integrated in a seat mounting vehicle to which the seat is removably connected.

17. The seat furniture component according to claim 1, characterized in that all the connection levers and coupling points are close to ur. vertex of the angle between the seat and the seat.

18. The seat furniture component according to claim 17, characterized in that all the connecting levers and the coupling points, in the seating position, are located in an area of approximately 15 to 40 square cm.

19. The seat furniture component according to claim 18, characterized in that the pivot axis is between 70-180 mm in front of a non-upholstered backrest and between 50-170 mm above a non-upholstered seat.

20. A coupling frame for insertion between a cha? i 9 supporting a backrest and a seat of the seat furniture component having a backrest adjustment and coupled, the coupling frame is characterized in that it comprises: u connection length to produce a syncretic adjustment of the back and the air, so that the backrest executes a movement of inclination towards backwards and of reduction euperexposed from a poem of higher straight air towards an extended reclining position ri-slits towards the support chassis as an essentially pivot movement around of a pivot shaft, the c - =. 1 is opposite the backrest and above the seat within the angle formed between the backrest and the seat, while the seat executes a slight movement from the seating position towards the reclining position; a support chassis mounting vehicle that integrates all the coupling points of the support chassis; a backup mounting vehicle which integrates all the backup coupling points; and a seat mounting vehicle, which integrates all seat coupling points.