Vehicle seat with frame threaded connection

Abstract

The invention relates to a vehicle seat (1) comprising a seat part (2) and a vehicle seat base (3) having a lower part (11) and an upper part (12), the height of which can be adjusted relative to the lower part, the upper part (12) having an upper frame (16) for supporting the seat part (2) or the lower part having a lower frame (17) for fixing the vehicle seat (1) to a vehicle body, characterized in that the upper part (12) has an upper frame (16) for supporting the seat part (2) or the lower part has a lower frame (17) for fixing the vehicle seat (1) to the vehicle body. At least one of the upper frame (16) and the lower frame (17) comprises a first frame part and a second frame part which are connected to each other by at least one connecting device (23), where the at least one connecting device (23) connects the add-on assembly (41) to the respective upper frame (16) and / or lower frame (17).

Description

Technical Field

[0001] The invention relates to a vehicle seat comprising a seat part and a vehicle seat base, the vehicle seat base having a lower part and a height-adjustable upper part, wherein the upper part comprises an upper frame for supporting the seat part or the lower part comprises a lower frame for attaching the vehicle seat to a vehicle body, wherein at least one of the upper frame and the lower frame comprises a first frame part and a second frame part which are connected to each other by at least one connecting device, wherein the at least one connecting device attaches an additional component to the respective upper frame and / or lower frame. Background Art

[0002] In motor vehicles, particularly commercial vehicles like tractors and trucks, seats are designed for maximum comfort due to their heavy use. Compared to seats in passenger cars, these vehicles feature suspension in the vehicle seat base, in addition to the vehicle's suspension. Spring movement or general height adjustability is achieved via a scissor frame, positioned between two frames. The lower frame is typically attached to the vehicle's main body, while the upper frame has attachments for at least one rail. These rails allow the seat to be adjusted along the direction of travel. Until now, these mountings have been welded or bolted to one side of the frame. When loads are applied by the seat structure or passengers, this transverse arrangement results in forces being applied to the mountings. These forces must be transferred unfavorably to the frame and shear frame via the transverse mountings. Furthermore, installing these mountings requires additional work steps.

[0003] The present invention provides a vehicle seat which eliminates the above-mentioned disadvantages of the prior art and improves the vehicle seat in terms of mechanics, manufacturing and design. Summary of the Invention

[0004] The vehicle seat comprises a seat part and a vehicle seat base, the vehicle seat base having a lower part and a height-adjustable upper part, wherein the upper part has an upper frame for supporting the seat part, or the lower part has a lower frame for fastening the vehicle seat to the vehicle body, wherein at least one of the upper frame and the lower frame comprises a first frame part and a second frame part which are connected to each other by at least one connecting device, wherein the at least one connecting device fastens additional components to the respective upper frame and / or lower frame.

[0005] Like a vehicle seat, the seat portion may have a backrest and headrest in addition to a seat cushion. Furthermore, the seat portion may include armrests. The backrest may extend in the seat's height direction Z, and the seat cushion may extend within a plane spanned by the seat's longitudinal direction X and width direction Y. The height direction Z, longitudinal direction X, and width direction Y form a Cartesian coordinate system. The seat cushion and backrest are typically arranged to rotate about an axis of rotation parallel to the seat's width direction Y, so they do not always need to be arranged along the X, Y, or Z axes.

[0006] According to the present invention, a vehicle seat base enables the height of the seat portion to be adjusted relative to the vehicle body. To this end, the vehicle seat base comprises a lower portion attached to the vehicle body and an upper portion supporting the seat portion. Preferably, the upper and lower portions are connected to each other in a height-adjustable manner.

[0007] According to a preferred embodiment, the upper part and the lower part are connected to each other via a scissor frame. Typically, the scissor frame includes at least a first scissor arm and a second scissor arm, wherein the two scissor arms are connected to each other so as to rotate about a common pivot axis. Preferably, the first scissor arm is connected to the lower part via a fixed bearing and to the upper part via a floating bearing, and the second scissor arm is connected to the upper part via a fixed bearing and to the lower part via a floating bearing. Alternatively, the two scissor arms may be connected to the upper part via a fixed bearing and to the lower part via a floating bearing, or to the lower part via a fixed bearing and to the upper part via a floating bearing.

[0008] Preferably, the scissor frame includes a spring element. The spring element may be connected to the first scissor arm and the second scissor arm. Alternatively, the spring element may be connected to one of the scissor arms and the upper or lower portion. Alternatively, the spring element may be connected to both the upper and lower portions. The spring element may inhibit movement between the upper and lower portions. Such a spring element may, for example, be an air spring, whereby the spring stiffness can be varied by internal or external pressure.

[0009] According to another embodiment, the upper part and the lower part are connected to each other in a height-adjustable manner via a spring element. Alternatively, the upper part and the lower part can be connected to each other in a height-adjustable manner via a spindle, a frame or a telescopic rod.

[0010] According to the invention, the upper or lower part has a frame. The frame of the upper part carries the seat part, thereby connecting the vehicle seat base to the seat part. The frame of the lower part is attached to the vehicle body, thereby connecting the vehicle seat base to the vehicle body.

[0011] Because forming a frame in one piece is very costly, the frame according to the present invention comprises a first frame part and a second frame part. However, since the frame serves as a load-bearing component for a vehicle seat, particularly a commercial vehicle, it must meet high strength and rigidity requirements. Therefore, it is necessary to connect the first and second frame parts to each other in accordance with these requirements. To this end, the present invention provides at least one connecting device.

[0012] According to a particularly preferred embodiment, the frame comprises at least four frame parts arranged in a rectangular shape, the frame being arranged in its main extension plane perpendicular to the height direction Z of the seat.

[0013] According to a preferred embodiment, the four sides of the rectangle are formed by four frame parts. Advantageously, at least two frame parts are of equal length.

[0014] In normal state, the height direction Z of the seat is parallel to the gravity F g To ensure that one side of the frame is not loaded by loads, for example by the seat part it supports, the frame is arranged in its main extension plane (ie the plane spanned by the sides of the frame) perpendicular to the height direction Z of the seat.

[0015] According to a particularly preferred embodiment, the frame has two main struts arranged parallel to each other, each main strut having a central web, an upper web and a lower web, the central web being arranged between the upper web and the lower web, the main struts being U-shaped or double T-shaped in a cross section perpendicular to their main extension axis, wherein at least two openings in each of the two main struts having a U-shaped or double T-shaped cross section are opposite to each other in their end regions, the frame having at least two transverse struts, which in each case connect the two main struts to one another in the end regions of their main extension axes, wherein the main struts are designed to guide at least one sliding element, such as a roller, a slider or a carriage.

[0016] For reasons of weight and cost, it is disadvantageous to form the frame components from solid material. Instead, the use of hollow tubes in frame construction has proven to be more efficient, as they offer similar mechanical properties in terms of bending, tension, compression and torsional stiffness, while using much less material. Struts with a U-shaped or double-T-shaped cross-section perpendicular to their main extension axis also offer good mechanical properties. Such struts have a central web and upper and lower webs. The central web is connected to the upper and lower webs by material bonding or is molded or manufactured as a single piece from one part. On the other hand, the upper and lower webs are not connected to each other. Preferably, the upper and lower webs are arranged parallel to each other, with the central web perpendicular to them. These struts are also known as U-profiles, double-T profiles or double-T beams, depending on their cross-section.

[0017] According to another embodiment, the main support can be designed as a square tube or a round tube, and each tube has at least one opening in the end region of its main extension axis.

[0018] According to a preferred embodiment, two parallel main struts are arranged with their main extension axes parallel to the longitudinal direction X of the seat, and two cross struts are arranged with their main extension axes parallel to the width direction Y of the seat. Preferably, each cross strut is connected to a main strut in the end region of its respective main extension axis. Alternatively or additionally, at least one cross strut may connect the two main struts in the central region of its main extension axis.

[0019] Preferably, the opening in the main strut is used to accommodate a sliding element of the scissor arm and / or an attachment to the scissor arm. Alternatively or additionally, the opening is used to accommodate an attachment to the spring element.

[0020] The upper and lower webs are preferably arranged in their main extension planes perpendicular to the seat height direction Z. Preferably, the upper and / or lower webs have a running surface for at least one sliding element. The at least one sliding element can then be moved along the main extension axis of the webs. Alternatively, it is also conceivable that the central web has a running surface for the at least one sliding element. The at least one sliding element is preferably a roller. Sliders or carriages, or combinations thereof, are also conceivable. An additional rail designed to guide the at least one sliding element can also be attached to the main support.

[0021] Preferably, the main struts form one of the first or second frame components and the cross struts form the other of these two components.

[0022] According to a preferred embodiment, the frame has a connecting device in each of the four end regions of the main struts. More preferably, the frame has at least one additional connecting device between the end regions of each main strut. Thus, the frame preferably has a total of at least six, more preferably at least eight, connecting devices. The connecting devices are also preferably arranged in two rows of four, parallel to the longitudinal direction X.

[0023] According to a particularly preferred embodiment, the connecting device comprises at least one threaded connection, wherein the frame has at least one channel opening through the two frame parts, wherein the channel extends parallel to the height direction Z of the seat and at least one threaded connection is arranged in the channel, which connects the two frame parts to each other in a non-positive manner.

[0024] Preferably, at least one connecting device connects the first frame component, the second frame component, and the additional component in a non-rigid manner. However, it is also conceivable that the connection is a rigid connection, a material bond, or a combination of the three. Alternatively, two of the three components may be connected using one connection method, while the last component may be connected using another connection method. For example, the two frame components may be connected using a non-rigid connection, while the additional component is connected to the connecting device using a material bond.

[0025] Preferably, the two frame parts or the main struts and the cross struts have a channel in which a threaded connection is arranged. To this end, at least one of the two frame parts or the main struts or the cross struts can have an internal thread into which a screw is screwed. Alternatively or additionally, the additional component can have an internal thread into which the screw is screwed. Preferably, the channel extends parallel to the height direction Z of the seat. Preferably, the channel passes through the main struts and the cross struts. It is also preferred that the channel passes through the additional component. According to one embodiment, the channel has the same shape and the same diameter everywhere. Preferably, the shape is a cylinder, the main extension of which extends in the height direction Z of the seat. It is also conceivable that the shape has two different diameters and / or two different shapes.

[0026] Preferably, the first and second frame parts are U-shaped in a cross-section perpendicular to their main extension axes, with the second frame part being lower in height direction Z than the first frame part. More preferably, the second frame part, which is lower in height than the first frame part, is inserted into the end region of the first frame part in an end region, with the first frame part at least partially surrounding the second frame part. Preferably, the channel is arranged in the end region where the first frame part at least partially surrounds the second frame part, with the channel being completely radially surrounded by the frame parts in height direction Z. Preferably, the main struts are inserted into the cross struts.

[0027] According to a particularly preferred embodiment, at least one bushing is inserted into the channel parallel to the height direction Z of the seat, wherein the bushing has a collar at a first end, the collar being larger than the diameter of the channel, the bushing having a second internal thread, into which a first screw engages from a second end opposite the collar, wherein the first screw and the bushing connect at least two frame parts to each other in a non-rigid manner.

[0028] Preferably, the bushing has the shape of a channel and a smaller diameter than the channel. However, it is also conceivable that the bushing has a different shape than the channel. Preferably, the bushing is hollow cylindrical and has an inner surface and a collar perpendicular to its main extension axis, the inner surface having an internal thread parallel to its main extension axis, whereby the diameter of the collar is greater than the diameter of the channel in one of the frame parts. The collar prevents the bushing from sliding through the channel and, in combination with a screw, allows the two frame parts to be connected in a non-rigid manner. Preferably, the outer surface of the bushing is free of threads. Since the bushing is used to fix at least one screw, it can also be called a nut. According to one embodiment, the internal thread extends over the entire length of the bushing. Alternatively, the internal thread can be arranged in sections on the inner surface of the bushing, wherein at least two sections of the bushing have internal threads and one section does not.

[0029] The first screw preferably has an externally threaded shank and a screw head. The screw head preferably has a diameter greater than the diameter of the passageway opposite the collar of the bushing. Additionally or alternatively, a washer having a diameter greater than the diameter of the passageway may be positioned between the first screw and the passageway, such that it faces the collar of the bushing. Additionally or alternatively, a washer having a diameter greater than the diameter of the passageway may be positioned between the bushing and the passageway, such that it faces the collar of the bushing.

[0030] Preferably, the first and second frame parts or the main and cross struts are connected to each other in a non-rigid and positive fit, the positive fit being formed by the collar of the bushing and the head of the screw.The screw and bushing are connected to each other in a non-rigid manner.

[0031] Alternatively, the first screw can also be designed without a head, and the positive fit and / or non-positive fit can be formed by a nut which is screwed onto the screw from the side which is not screwed into the bushing.

[0032] According to one embodiment, the bushing has an external thread. In this case, the bushing is longer than the passage through the first and second frame parts. The external thread is then placed on the end of the bushing opposite the collar. A nut, whose diameter is greater than the diameter of the passage, is screwed onto the externally threaded end, which protrudes beyond one end of the passage when the bushing is placed in the passage. The nut and bushing, in this case, can be described as threaded inserts, forming a non-rigid connection between the two frame parts.

[0033] According to a particularly preferred embodiment, at least one channel is an elongated hole.

[0034] The slotted hole allows the bushing to have a certain amount of play due to the expansion of the slotted hole, which can compensate for component tolerances of the main strut and cross strut.

[0035] According to a particularly preferred embodiment, the additional component is screwed onto the bushing from a first end having a collar by means of a second screw.

[0036] Preferably, viewed in the height direction Z, the collar of the bushing is arranged above the frame in the case of an upper part of the vehicle seat substructure and below the frame in the case of a lower part of the vehicle seat substructure.

[0037] According to a preferred embodiment, the first screw penetrates the bushing to at least one-third and at most two-thirds of the total length of the bushing. Preferably, the second screw is screwed into the bushing from the side not occupied by the first screw. The second screw can be screwed into the bushing to at least one-quarter and at most one-third of the total length of the bushing. Preferably, the second screw has a screw shank and a screw head. Particularly preferably, the additional component has a channel that is larger than the diameter of the second screw. Preferably, the second screw passes through the channel of the additional component and is screwed into the bushing. The screw head forms a rigid fit between the additional component and the second screw. Alternatively or additionally, a washer and / or a nut can form a rigid fit between the second screw and the additional component. The additional component can also have a thread, whereby the additional component and the second screw are connected to each other in a non-rigid manner.

[0038] Preferably, the additional component rests partially, particularly preferably completely, on the collar of the bushing. Alternatively, the collar of the bushing may rest partially, preferably completely, on the component. Of course, it is also conceivable that the additional component is connected to several bushings via several threaded connections. In this case, the additional component is preferably partially, particularly preferably completely, located on all collars of the bushing.

[0039] According to a preferred embodiment, the at least one connecting means comprises a first screw, a second screw, and a nut. Preferably, both the first screw and the second screw are non-rigidly connected to the nut. Furthermore, the first screw and the nut preferably non-rigidly connect the first frame part to the second frame part, and the second screw and the nut preferably non-rigidly connect the additional component to at least one of the two frame parts.

[0040] According to a particularly preferred embodiment, at least one spacer separates the upper web from the lower web. The spacer at least partially circumferentially delimits the at least one channel.

[0041] The spacer prevents the average distance between the upper and lower webs from being reduced due to forces exerted on at least one of the webs by the threaded connection arranged between the webs. Preferably, the spacer is in the form of a hollow cylindrical sleeve, the height of which corresponds to the distance between the upper and lower struts. This sleeve is arranged within the main strut or frame member in such a way that it at least partially surrounds the channel, and the bushing is inserted into the sleeve or spacer.

[0042] According to a particularly preferred embodiment, at least one spacer forms part of a transverse strut.

[0043] The fact that at least one spacer forms part of the transverse strut ensures that the spacer is securely fixed in place and cannot slip. Furthermore, no special considerations need to be given to the alignment of the spacer during installation. To this end, a portion of the transverse strut can be molded or formed into a semicircular, preferably circular, shape. This semicircular or circular component then corresponds to the aforementioned sleeve. The spacer is particularly preferably rectangular with open sides.

[0044] According to a particularly preferred embodiment, the additional component is at least one accessory for the seat shell arranged above the frame.

[0045] According to a particularly preferred embodiment, the additional component is at least one seat rail or slide arranged above or below the frame.

[0046] According to a preferred embodiment, the additional component is a pivot axis, wherein the seat part is arranged to be rotatable about the pivot axis. More preferably, the additional component is the vehicle body or a mounting plate arranged on the vehicle body. Preferably, the additional component is a support or beam of a rocker, wherein the seat part is rotatable relative to the vehicle seat base about an inclination axis parallel to the width direction Y of the vehicle seat.

[0047] Preferably, the additional component supports the seat portion.

[0048] According to a particularly preferred embodiment, the connecting device simultaneously fixes the additional component and connects the frame parts in a non-rigid manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Other objects, advantages and usefulness of the present invention can be found in the following description in conjunction with the accompanying drawings.

[0050] Figure 1 is an isometric view of a prior art vehicle seat base;

[0051] Figure 2 is an overall view of a vehicle seat according to the present invention;

[0052] Figure 3 is an isometric view of a vehicle seat base according to the present invention;

[0053] Figure 4 It is an isometric view of the frame;

[0054] Figure 5a is a portion of the cross section through the frame along the YZ plane;

[0055] Figure 5b is a portion of the section through the frame along the YZ plane, with attached components;

[0056] Figure 6 It is an isometric view of the cross strut;

[0057] Figure 7 4 is a cross-sectional view of a vehicle seat base along the XZ plane according to the present invention. DETAILED DESCRIPTION

[0058] Figure 1 The vehicle seat base 2 of the prior art is shown. The vehicle seat base 2 has an upper part 10 with an upper frame 16 and a lower part 11 with a lower frame 17. A carrier assembly is welded to the upper frame 16. The fixing screws 46 for the slide rails 8 are arranged in the carrier assembly close to the upper frame 16.

[0059] Figure 2 A vehicle seat 1 according to the present invention is shown. X is the longitudinal direction of the seat, Y is the width of the seat, and Z is the height of the seat. The vehicle seat comprises a seat portion 2 and a vehicle seat base 3 arranged below the seat portion 2 in the height direction Z, supporting the seat portion 2. In addition to a seat cushion 4 extending parallel to the XY plane, the seat portion 2 also comprises a backrest component 5 extending in the height direction Z, with an adjacent headrest 6 and two armrests 7 attached to the sides of the backrest and extending parallel to the seat cushion. Several controls are provided for adjusting the seat, including seat height adjustment, seat length adjustment, seat cushion depth and tilt adjustment, backrest tilt adjustment, backrest extension, lumbar support adjustment, and armrest height and tilt adjustment. These adjustments can be used to change the orientation and / or position of nearly all of the aforementioned components in a given space. Slide rails 8 are mounted on the vehicle seat base 3 to adjust the seat portion 2 in the longitudinal direction X.

[0060] Figure 3 The vehicle seat base 3 is shown. The vehicle seat base 3 is divided into an upper portion 10 and a lower portion 11. A scissor frame 12 is arranged between the upper portion 10 and the lower portion 11. The scissor frame consists of two scissor arms. The first scissor arm 13 and the second scissor arm 14 have a rectangular cross-section, with the second scissor arm 14 being smaller in width than the first scissor arm 13. The first scissor arm 13 and the second scissor arm 14 are arranged crosswise, with the second scissor arm 14 positioned inside the first scissor arm. Parallel to the width direction Y, the first scissor arm 13 and the second scissor arm 14 are rotatably connected to each other along their widths about a pivot axis 15. The upper portion 10 also has an upper frame 16 for connecting the upper portion 10 to the scissor frame 12, while the lower portion 11 has a lower frame 17 for connecting the lower portion 11 to the scissor frame 12. The first scissor arm 13 is connected to the upper frame 16 via a fixed bearing 18 and to the lower frame 17 via a floating bearing 19. The second scissor arm 14 is connected to the upper frame 16 via a floating bearing 19 and to the lower frame 17 via a fixed bearing. In order to be able to adjust the distance between the upper frame 16 and the lower frame 17 , an air spring (not shown here) is arranged between the first scissor arm 13 and the lower frame 7 .

[0061] Figure 4 The upper frame 16 is shown. The upper frame 16 has two main struts 20 extending parallel to each other in the longitudinal direction X. Two cross struts 21 extending in the width direction Y are arranged perpendicular to the main struts 20. The main struts 20 are connected to the cross struts 21 at both end regions 22 of their main extension axis. This connection is achieved by a total of four connecting devices 23. The main struts 20 and cross struts 21 are arranged in a rectangular shape. To stabilize the rectangular shape, the front of the cross struts 21 has a projection 24 extending along the main axis of the main struts 20. Each projection 24 is connected to one of the main struts 20 in a central region 25 via a connecting device 23. In addition, each main strut 20 has another connecting device 23 in its central region, while these connecting devices 23 do not connect the main struts 20 to the cross struts 21.

[0062] Figure 5a and Figure 5b A cross-sectional view of the connecting elements of the upper frame 16 along the YZ plane is shown. In this cross-sectional view, the main strut 20 is shown as a U-shape, comprising a central web 26 forming the outer side of the upper frame 16, an upper web 27 forming the upper side of the upper frame 16, and a lower web 28 forming the lower side of the upper frame 16. Sliding elements in the form of rollers 29 are arranged within the space of the main strut 20 enclosed by the central web 26, the upper web 27, the lower web 28, and a stop 31. The underside of the upper web 27 forms a running surface 30 for the rollers 29, on which the rollers 29 can run in the longitudinal direction X. The stop 31 prevents the rollers 29 from jumping off the running surface 30. The rollers 29 and the main strut 20 form the floating bearing 19 for the first and second scissor arms 13 and 14. The cross strut 21 partially surrounds the main strut 20, i.e., it is arranged partially above and partially below the main strut 20. A passage 32, in the form of an elongated hole 33 punched from the main strut 20 and transverse strut 21, extends through the main strut 20 and transverse strut 21. A threaded bushing 34 is inserted into the elongated hole 33 from above. The bushing 34 has a collar 35 in the form of a flange, which prevents the bushing 34 from slipping through the elongated hole 33. The bushing 34 is only approximately two-thirds the length of the elongated hole 33, allowing it to be inserted into the elongated hole 33 but not pass through it. Furthermore, the bushing 34 has a continuous internal thread, which is divided into a first internal thread 36 and a second internal thread 37. The first internal thread 36 covers the lower end of the bushing 34, while the second internal thread 37 covers the upper end of the bushing 34. A first screw 38 is screwed into the first internal thread 36 from the underside of the upper frame 16. The first screw 38 also has a first screw head 39, the diameter of which is larger than that of the elongated hole 33, preventing the first screw 38 from slipping through the elongated hole 33.

[0063] When the first screw 38 is tightened onto the bushing 34, the collar 35 compresses from above, and the first screw head 39 compresses the cross strut 21 from below, compressing the cross strut in the height direction Z. If the cross strut 21 is further compressed, it contacts and compresses the main strut 20. To ensure a sufficiently non-rigid connection between the main strut 20 and the cross strut 21 without excessive deformation, a portion of the cross strut is formed as a spacer 40. The spacer 40 encompasses the shape of the elongated hole 33 and forms a stop for the contraction of the first screw 38 and bushing 34. An additional component 41, in the form of a slide rail 8, is placed on the collar 35. As a result, the slide rail 8 does not contact the frame, but only the collar 35 of the bushing 34, through which it is fastened to the upper frame 16. To secure the slide rail 8 to the bushing 34, a second screw 42 with a second screw head 43 is inserted from above into the bushing 34 through a second, punched-out channel 44 of the slide rail and screwed into the second internal thread 37. In this way, the slide rail 8 is non-rigidly connected to the bushing 34 and thus to the main strut 20 and the cross strut 21. The bushing 34 is arranged so that its collar 35 is directly above the running surface 30 of the roller 29. As a result, the load on the bushing 34 is directly transmitted via the upper web 27 to the roller 29 and thus to the scissor frame 12.

[0064] Figure 6 An isometric view of a cross strut 21 is shown. The elongated holes 33 at each of the two end regions 22 and the spacers 40 surrounding the elongated holes are shown. The cross strut 21 forms a U-shaped profile similar to the main strut 20. The elongated holes 33 have a rectangular base, which is surrounded by the spacers 40 in a U-shape. The bushing 34, not shown here, has a cubic area below its collar 35. The dimensions of the cube correspond to the diameter of the elongated hole 33. This cubic area does not completely fill the elongated hole 33, but prevents the bushing 34 from twisting relative to the elongated hole when inserted into the elongated hole 33. The spacers 40 are also smaller than the main strut 20 because they are inserted into the main strut 20. On the other hand, the height of the cross strut 21 is greater than that of the main strut 20 because the cross strut 21 surrounds the main strut 20.

[0065] Figure 7A cross section through the vehicle seat base 3 along the XZ plane is shown. Four connecting devices 23 are clearly arranged in the upper frame 16. These connecting devices 23 connect the two frame components in each end region 22 via a first screw 38 and a bushing 34. The slide rail 8 rests on a collar 35 of the bushing 34 and is screwed to the bushing 34 via a second screw 42. The other two connecting devices are arranged in the central region 25. The two connecting devices 23 in the central region 25 do not have any second screws 42. The slide rail 8 rests only on the collar 35 of one of the two bushings 34 in the central region 25. The other connecting device 23, on the other hand, does not contact the slide rail 8. Therefore, the connecting devices 23 in the central region 25 only connect the main strut 20 and the cross strut 21 and do not secure the slide rail 8. If necessary, such as in the case of high loads, the connecting devices 23 in the central region 25 can also be used to secure the slide rail 8. The scissor frame 12 is arranged between the upper part 10 and the lower part 11. Visible here are two fixed bearings 18 and a floating bearing 19 comprising two rollers 29. The rollers 29 run on the running surfaces 30 of the lower frame 17 and the upper frame 16. The connecting device 23 of the central region 25 is arranged in the path of the running surface 30 of the upper frame 16. To prevent the rollers 29 and the connecting device 23 from collapsing, a stop is provided between the rollers 29 and the connecting device 23 within the main support 20 formed by the central web 26, the upper web 27, and the lower web 28. The stop consists of individual rods connected to each other in a truss-like manner. When the stop and the roller 29 meet, the stop deforms, thereby suppressing the movement of the roller 29 until the stop reaches its maximum deformation. The stop then forms a stop for the roller 29.

[0066] Reference Signs List 1 vehicle seat, 2 seat parts, 3 vehicle seat bases, 4 seat cushions, 5 backrest parts, 6 headrests, 7 armrests, 8 slide rails, 10 upper part, 11 lower part, 12 Scissor frames, 13 First scissor arm, 14 Second scissor arm, 15 pivot axis, 16 upper frame, 17 lower frame, 18 fixed bearing, 19 floating bearing, 20 main pillars, 21 horizontal pillars, 22 end regions, 23 connecting device, 24 bulge, 25 Central Area, 26 center web, 27 Upper abdominal plate, 28 lower web, 29 rollers, 30 running surfaces, 31 Restrictions, 32 channels, 33 long holes, 34 bushings, 35 collar, 36 first internal thread, 37 Second internal thread, 38 First screw, 39 First screw head, 40 spacers, 41 add-ons, 42 Second screw, 43 Second screw head, 44 Second channel, 46 fixing screws.

Claims

1. A vehicle seat (1) comprising a seat part (2) and a vehicle seat base (3), the vehicle seat base (3) having a lower part (11) and an upper part (12) which is height-adjustable relative to the lower part (11), wherein the upper part (12) has an upper frame (16) for supporting the seat part (2) or the lower part (13) has a lower frame (17) for fastening the vehicle seat (1) to a vehicle body, It is characterized by: At least one of the upper frame (16) and the lower frame (17) comprises a first frame part and a second frame part connected to each other by at least one connecting device (23), the connecting device (23) connecting an additional component (41) to the respective upper frame (16) and / or lower frame (17).

2. The vehicle seat (1) according to claim 1, It is characterized by At least one of the upper frame (16) and the lower frame (17) is composed of at least four rectangularly arranged frame parts, and at least one of the upper frame (16) and the lower frame (17) is arranged in its main extension plane perpendicular to the height direction (Z) of the vehicle seat (1).

3. The vehicle seat (1) according to claim 2, It is characterized by At least one of the upper frame (16) and the lower frame (17) has two main struts (20) arranged parallel to each other, each of the main struts having a central web (26), an upper web (27) and a lower web (28), wherein the central web (26) is arranged between the upper web (27) and the lower web (28), the main struts (20) being U-shaped or double T-shaped in a cross section perpendicular to their main extension axis, wherein at least two openings of the U-shaped or double T-shaped cross section in each main strut (20) are opposite to each other in the end region (22), and at least one of the upper frame (16) and the lower frame (17) has at least two transverse struts (21), which in each case connect two main struts (20) to each other in the end region (22) of their main extension axis, wherein the main struts (20) are designed to guide at least one sliding element.

4. The vehicle seat (1) according to claim 3, It is characterized by The connecting device (23) comprises at least one threaded connection, wherein at least one of the upper frame (16) and the lower frame (17) has at least one channel (32) passing through the first frame part and the second frame part, wherein the channel (32) extends parallel to the height direction (Z) of the vehicle seat (1), the at least one threaded connection being arranged in the channel (32), and the at least one threaded connection connecting the first frame part and the second frame part to each other in a non-rigid manner.

5. The vehicle seat (1) according to claim 4, It is characterized by At least one bushing (34) is inserted into the channel (32) parallel to the height direction (Z) of the vehicle seat (1), the bushing (34) having a collar (35) at a first end that is larger than the diameter of the channel (32), the bushing (34) having a first internal thread (36), a first screw (38) engaging in the first internal thread from a second end opposite to the collar (35), the first screw (38) and the bushing (34) connecting the first frame part and the second frame part to each other in a non-rigid manner.

6. The vehicle seat (1) according to claim 4, It is characterized by The passage (32) is a long hole (33).

7. The vehicle seat (1) according to claim 5, It is characterized by The additional component (41) is screwed onto the bushing (34) from the first end having the collar (35) by means of a second screw (42).

8. The vehicle seat (1) according to any one of claims 4 to 7, It is characterized by At least one spacer (40) separates the upper web (27) and the lower web (28), and the spacer (40) at least partially circumferentially bounds the passage (32).

9. The vehicle seat (1) according to claim 8, It is characterized by The spacer (40) forms part of the transverse strut (21).

10. The vehicle seat (1) according to claim 1, It is characterized by The additional component (41) is at least one accessory for a seat shell arranged above the upper frame (16).

11. The vehicle seat (1) according to claim 1, It is characterized by The additional component (41) is at least one slide rail (8) or slideway arranged above the upper frame (16) or below the lower frame (17).

12. The vehicle seat (1) according to claim 1, It is characterized by The connecting device (23) simultaneously secures the additional component (41) and connects the first frame part and the second frame part in a non-rigid manner.

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