Vehicle seat having frame screw connection

Abstract

To provide a vehicle seat including a seat part and a vehicle seat base (3) having a lower part (11) and an upper part (12) which enables height adjustment relative to the lower part.SOLUTION: The invention relates to a vehicle seat. In the vehicle seat, an upper part (12) of the vehicle seat has a frame (16) for supporting a seat part or a lower part has a frame (17) for fastening the vehicle seat to a vehicle body. The frame includes a first frame part and a second frame part which are connected to each other by at least one connection means. The at least one connection means attaches an additional component to the frame.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat comprising a seat part and a vehicle seat base having a lower part and a height-adjustable upper part, wherein the upper part comprises a frame for supporting the seat part or the lower part comprises a frame for attaching the vehicle seat to a body, the frame comprising a first frame part and a second frame part connected to each other by at least one connecting means, the at least one connecting means attaching additional components to the frame. [Background technology]

[0002] In automobiles, especially commercial vehicles such as tractors or tank trucks, vehicle seats are designed for maximum comfort due to their intensive use. In contrast to passenger car seats, these seats have a suspension system at the vehicle seat base in addition to the vehicle suspension. A scissor frame located between two frames allows for spring movement or general height adjustability. The lower frame is typically attached to the vehicle body, while the upper frame has attachments for at least one slide rail. These slide rails allow the seat to be adjusted along the direction of travel. Until now, such attachments have been welded or bolted to the side of the frame. This lateral arrangement results in forces being applied to the attachments when the seat structure or occupant is loaded. These forces are inevitably transmitted to the frame and shear frame in an undesirable manner via the lateral attachments. Furthermore, securing the attachments requires additional work steps. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention provides a vehicle seat that eliminates the aforementioned shortcomings of the prior art and improves vehicle seats in terms of mechanics, manufacturing and design. [Means for solving the problem]

[0004] The vehicle seat comprises a seat portion and a vehicle seat base having a lower portion and a height-adjustable upper portion, the upper portion having a frame for supporting the seat portion or the lower portion having a frame for fastening the vehicle seat to the body, the frame comprising a first frame portion and a second frame portion connected to each other by at least one connecting means, the at least one connecting means fastening additional components to the frame.

[0005] Similar to a vehicle seat, the seat portion may also have a backrest and a headrest in addition to the seat cushion. Furthermore, the seat portion may also include armrests. The backrest may extend in a height direction Z of the seat, and the seat cushion may extend in a plane spanned by a longitudinal direction X of the seat and a width direction Y of the seat. The height direction Z, the longitudinal direction X, and the 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 width direction Y of the seat, and are therefore not necessarily aligned along X, Y, or Z.

[0006] According to the present invention, the vehicle seat base allows the height of the seat portion to be adjusted relative to the vehicle body. For this purpose, 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 so as to be height-adjustable.

[0007] According to a preferred embodiment, the upper and lower parts are connected to each other by a scissor frame. Typically, the scissor frame includes at least a first scissor arm and a second scissor arm, which are connected to each other so as to be rotatable 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, both scissor arms may be connected to the upper part via fixed bearings and to the lower part via floating bearings, respectively, or may be connected to the lower part via fixed bearings and to the upper part via floating bearings, respectively.

[0008] Preferably, the scissor frame includes a spring element. The spring element can be connected to the first and second scissor arms. Alternatively, the spring element can be connected to one of the scissor arms and the top or bottom. Alternatively, the spring element can be connected to the top and bottom. The spring element can damp movement between the top and bottom. Such a spring element can be, for example, an air spring, in which case the spring stiffness can be changed by internal or external pressure.

[0009] According to a further embodiment, the upper and lower parts are connected to each other in a height-adjustable manner via spring elements. Alternatively, the upper and lower parts can be connected to each other in a height-adjustable manner via spindles, racks or telescopic rods.

[0010] According to the present invention, the upper or lower portion has a frame, the upper frame supports the seat portion and thus connects the vehicle seat base to the seat portion, and the lower frame is attached to the body and thus connects the vehicle seat base to the body.

[0011]

[0006] Because forming a frame as a single unit would be very costly, the frame according to the present invention comprises a first frame section and a second frame section. However, since the frame must meet high requirements in terms of strength and rigidity for use as a load-bearing section of a vehicle seat, particularly a commercial vehicle, the first frame section and the second frame section must be connected to each other in accordance with these requirements. For this purpose, the present invention provides at least one connecting means.

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

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

[0014] In the normal state, the seat height direction Z is affected by the gravity force F g To ensure that the frame is not biased to one side by loads, for example by the seat it supports, the frame is arranged perpendicular to the height direction Z of the seat in its main plane of extension, i.e. in the plane spanned by the sides of the frame.

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

[0016] For weight and cost reasons, it is not preferable to construct the frame from solid material. Instead, using hollow tubes for frame construction has proven more effective, providing similar mechanical properties in terms of bending, tension, compression, and torsional stiffness while using significantly less material. Struts with U-shaped or double T-shaped cross sections perpendicular to their main axis of extension 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 a material bond, or is molded from a single piece or fabricated integrally. Meanwhile, 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. Depending on their cross sections, these struts are also known as U-sections, double T-sections, or double T-beams.

[0017] According to a further embodiment, the above-mentioned main struts can be designed as square or round tubes, each of which has at least one opening in the end region of its main axis of extension.

[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 sheet, and two cross struts are arranged with their main extension axes parallel to the transverse direction Y of the sheet. Preferably, the cross struts are connected to the main struts respectively in the end regions of their respective main extension axes. Alternatively or additionally, at least one cross strut can connect two main struts in the central area of ​​their main extension axes.

[0019] Preferably, the opening in the main strut serves to accommodate a sliding element of the scissor arm and / or a mounting for the scissor arm. Alternatively or additionally, the opening serves to accommodate a mounting for the spring element.

[0020] Preferably, the upper and lower webs are arranged with their main extension plane perpendicular to the height axis Z of the seat. 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 move along the main extension axis of the web. Alternatively, it is also conceivable that the central web has a running surface for 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 strut.

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

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

[0023] According to a particularly preferred embodiment, the connection means comprises at least one screw connection, the frame has at least one passage opening passing through two of the frame parts, the passage extending parallel to the height direction Z of the seat, and the at least one screw connection being arranged in the passage connecting the two frame parts to one another non-positively.

[0024] Preferably, at least one connecting means connects the first frame part, the second frame part, and the additional component in a non-positive manner. However, it is also conceivable that the connection may be positive, a material bond, or a combination of the three. Two of the three parts may be connected by one type of connection, and the final component may be attached to them by a different type of connection. For example, the two frame parts may be connected by a non-positive connection, and the additional component may be connected to the connecting means by a material bond.

[0025] Preferably, the two frame sections or the main strut and the cross strut have a passage in which the screw connection is arranged. For this purpose, at least one of the two frame sections or the main strut or the cross strut can have an internal thread into which the screw is screwed. Alternatively or additionally, the additional component can have an internal thread into which the screw is screwed. Preferably, the passage extends parallel to the height direction Z of the seat. Preferably, the passage extends through the main strut and the cross strut. It is also preferable for the passage to extend through the additional component. According to one embodiment, the passage has the same shape and the same diameter everywhere. Preferably, the shape is a cylinder with a main extension extending along the height direction Z of the seat. It is also conceivable for the shape to have 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 axis, and the second frame part has a lower height in the height direction Z than the first frame part. More preferably, the second frame part, having a lower height than the first frame part, is inserted into the end region of the first frame part in the end region, and the first frame part at least partially surrounds the second frame part. Preferably, the passage is arranged in the end region where the first frame part at least partially surrounds the second frame part, and the passage is completely surrounded radially by the frame parts in the 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 a passage parallel to the height direction Z of the seat, the bushing having a collar at a first end larger than the diameter of the passage, the bushing having a second internal thread that engages with a first screw from a second end opposite the collar, the first screw and the bushing non-positively connecting the at least two frame parts to each other.

[0028] Preferably, the bushing has the same shape as the passage and a smaller diameter than the passage. However, it is also conceivable that the bushing has a different shape than the passage. Preferably, the bushing is hollow cylindrical, has an inner surface with an internal thread parallel to its main axis of extension, and a collar perpendicular to its main axis of extension, in which case the collar has a larger diameter than the passage in one of the frame parts. This collar can prevent the bushing from slipping into the passage and, in combination with the screw, can non-positively connect the two frame parts. Preferably, the outer surface of the bushing does not have a thread. Because the bushing functions to retain at least one screw, it is also referred to as 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 multiple sections on the inner surface of the bushing, in which case the bushing has at least two sections with internal threads and one section without internal threads.

[0029] Preferably, the first screw has a screw shank with external threads and a screw head. The diameter of the screw head is also preferably larger than the passage facing the collar of the bushing. Additionally or alternatively, a washer having a larger diameter than the passage can be disposed between the first screw and the passage, and in this case, the washer is located on the opposite side of the collar of the bushing. Additionally or alternatively, a washer having a larger diameter than the passage, located opposite the head of the first screw, can also be disposed between the bushing and the passage.

[0030] Preferably, the first and second frame sections or main struts and cross struts are connected to one another with a non-positive and positive fit, the positive fit being formed by the collar of the bushing and the head of the screw, the screw and the bushing being connected to one another non-positively.

[0031] Alternatively, the first screw can be designed without a head, and the positive and / or non-positive fit can be formed by a nut that is screwed onto the screw from the side that is not threaded 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 with a diameter larger than the diameter of the passage has an external thread and is screwed onto the end that protrudes beyond one end of the passage when the bushing is placed in the passage. The nut and bushing can be described as a threaded insert in this case, creating a non-positive connection between the two frame parts.

[0033] According to a particularly preferred embodiment, at least one passage is a slot.

[0034] The slots allow the bushings to be positioned with a certain amount of play due to the expansion of the slots, which can compensate for component tolerances of the main and cross struts.

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

[0036] Preferably, the collar of the bushing is arranged above the frame when the seat is at the upper part of the vehicle seat base, and below the frame when the seat is at the lower part, as viewed from the height direction Z.

[0037] According to a preferred embodiment, the first screw penetrates the bushing over at least one-third to two-thirds of its total length. Preferably, the second screw is threaded into the bushing from the side not occupied by the first screw. The second screw can be threaded into the bushing over at least one-quarter to one-third of its total length. Preferably, the second screw has a screw shank and a screw head. Particularly preferably, the additional component has a passage larger than the diameter of the second screw. Preferably, the second screw passes through the passage of the additional component and is threaded into the bushing. The screw head forms a positive fit between the additional component and the second screw. Alternatively or additionally, a washer and / or a nut can form a positive 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 non-positively connected to each other.

[0038] Preferably, the additional component rests partially, particularly preferably completely, on the collar of the bushing. It is also possible for the collar of the bushing to rest partially, preferably completely, on the component. Of course, it is also conceivable that the additional component is connected to several bushings by several threaded connections. In such a case, the additional component preferably rests partially on all collars of the bushings, particularly preferably completely on all collars of the bushings.

[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-positively connected to the nut. Furthermore, it is preferred that the first screw and the nut non-positively connect the first frame part and the second frame part, and the second screw and the nut non-positively connect at least one of the two frame parts to the additional component.

[0040] According to a particularly preferred embodiment, at least one spacer separates the upper and lower webs, the spacer at least partially circumferentially limiting at least one passageway.

[0041] The spacer prevents a reduction in the average distance between the upper and lower webs due to a force exerted on at least one of the webs by a threaded connection disposed 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. The sleeve is disposed within the main strut or frame section so as to at least partially enclose the passage when the bushing is inserted into the sleeve or spacer.

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

[0043] The fact that at least one spacer forms part of the crossing strut ensures that the spacer stays firmly in place and cannot slip. Furthermore, special considerations regarding the alignment of the spacer during installation are not required. To this end, a portion of the crossing strut can be molded or formed into a semicircular, preferably circular, shape. This semicircular or circular portion corresponds to the aforementioned sleeve. It is particularly preferred that the spacer be rectangular in shape with open sides.

[0044] According to a particularly preferred embodiment, the additional component is at least one attachment for a 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, and the seat portion is arranged to be rotatable about the pivot axis. More preferably, the additional component is a vehicle body or a mounting plate arranged on the body. Preferably, the additional component is a stand or beam of a rocker, and the seat portion is rotatable relative to the vehicle seat base about a tilt 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 connection means simultaneously secure the additional component and non-positively connect the frame parts.

[0049] Further objects, advantages and utilities of the present invention can be found in the following description taken in conjunction with the drawings. [Brief explanation of the drawings]

[0050] [Figure 1] FIG. 1 is an isometric view of a vehicle seat base from the prior art. [Figure 2] 1 is an overall view of a vehicle seat according to the present invention; [Figure 3] 1 is an isometric view of a vehicle seat base according to the present invention; [Figure 4] FIG. 1 is an isometric view of the frame. [Figure 5a] This is a portion of a cross section through the frame along the YZ plane. [Figure 5b] 1 is a portion of a cross section through the frame along the YZ plane with additional components. [Figure 6] FIG. 1 is an isometric view of a cross strut. [Figure 7] 1 is a cross section along the XZ plane through the vehicle seat base according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0051] 1 shows a prior art vehicle seat base 3. The vehicle seat base 3 has an upper portion 10 with an upper frame 16 and a lower portion 11 with a lower frame 17. A load-bearing component 47 is welded to the upper frame 16. Fixing screws 46 for the slide rails 8 are located on the load-bearing component 47 next to the upper frame 16.

[0052] FIG. 2 shows a vehicle seat 1 according to the present invention. X is the longitudinal direction of the seat, Y is the width direction of the seat, and Z is the height direction of the seat. The vehicle seat includes a seat portion 2 and a vehicle seat base 3 that is positioned below and supports the seat portion 2 in the height direction Z. In addition to a seat cushion 4 extending parallel to the XY plane, the seat portion 2 includes a back portion 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 almost any orientation and / or position of the aforementioned parts in space. A slide rail 8 is mounted on the vehicle seat base 3 for adjusting the seat portion 2 in the longitudinal direction X.

[0053] FIG. 3 shows a vehicle seat base 3. The vehicle seat base 3 is divided into an upper section 10 and a lower section 11. A scissor frame 12 is disposed between the upper section 10 and the lower section 11. The scissor frame consists of two scissor arms 13, 14. The first scissor arm 13 and the second scissor arm 14 have a rectangular cross section, and the second scissor arm 14 has a smaller width than the first scissor arm 13. The first scissor arm 13 and the second scissor arm 14 are disposed crosswise, and the second scissor arm 14 is disposed inside the first scissor arm. The scissor arms 13, 14 are rotatably connected to each other about a pivot axis 15 along their widths, parallel to the width direction Y. The upper section 10 also has an upper frame 16 for connecting the upper section 10 to the scissor frame 12, and the lower section 11 has a lower frame 17 for connecting the lower section 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. An air spring (not shown here) is arranged between the first scissor arm and the lower frame 17 so that the distance between the upper frame 16 and the lower frame 17 can be adjusted.

[0054] FIG. 4 shows an upper frame 16. 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 thereto. The main struts 20 are connected to the cross struts 21 at both end regions 22 of their main axes of extension. The connection is made by a total of four connection means 23. The main struts 20 and the cross struts 21 are arranged in a rectangular shape. To stabilize the rectangular shape, the front portions of the cross struts 21 have bulges 24 extending along the main axes of the main struts 20. Each bulge 24 is connected to one of the main struts 20 in a central area 25 by a connection means 23. Furthermore, each main strut 20 has additional connection means 23 in its central area; these connection means 23 do not connect the main strut 20 to the cross struts 21.

[0055] 5a and 5b show cross-sectional views of the connecting elements of the upper frame 16 along the YZ section. In this cross-sectional view, the main struts 20 exhibit a U-shape, with 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 underside of the upper frame 16. A sliding element 29 in the form of a roller 29 is arranged in the space of the main strut 20 bounded by the webs 26, 27, and 28 and the limiting portion 31. The underside of the upper web 27 forms a running surface 30 for the roller 29, on which it can run in the longitudinal direction X, being prevented from jumping out of the running surface 30 by the limiting portion 31. The roller 29 and the main strut 20 form the floating bearing 19 for the scissor arms 13, 14. The cross struts 21 partially surround the main strut 20, i.e., are arranged partially above and below the main strut 20. A passage 32 in the form of a slot 33 punched in the struts 20, 21 extends through both struts 20, 21. A bushing 34 in the form of a threaded bushing 34 is inserted into this slot 33 from above. The threaded bushing 34 has a collar 35 in the form of a flange, which prevents the threaded bushing 34 from sliding into the slot 33. The threaded bushing 34 also extends only about two-thirds the length of the slot 33, so that it can be inserted into the slot 33 but not all the way through. Furthermore, the threaded bushing 34 has a continuous internal thread that can be divided into a first internal thread 36 and a second internal thread 37, with the first internal thread 36 covering the lower end of the threaded bushing 34 and the second internal thread 37 covering the upper end of the threaded bushing 34. A first screw 38 is threaded 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 with a larger diameter than the slot 33 , which prevents the first screw 38 from slipping into the slot 33 .

[0056] When the first screw 38 is tightened into the threaded bushing 34, the collar 35 presses from above and the first screw head 39 presses from below against the cross strut 21, compressing it along the height direction Z. If the cross strut 21 is further compressed, it will come into contact with the main strut 20, compressing the main strut 20 as well. To ensure a sufficiently non-positive connection between the main strut 20 and the cross strut 21 without excessive deformation, a portion of the cross strut is shaped as a spacer 40. The spacer 40 surrounds the shape of the slot 33 and stops the contraction of the first screw 38 and the threaded bushing 34. An additional component 41 in the form of a slide rail 8 rests on the collar 35. The slide rail 8 therefore does not contact the frame, but only the collar 35 of the threaded bushing 34, thereby fastening the slide rail 8 to the upper frame 16. To fasten the slide rail 8 to the threaded bushing 34, a second screw 42 having a second screw head 43 is inserted from above through a second lead hole 44 punched in the slide rail and into the threaded bushing 34 and screwed into the second internal thread 37. In this way, the slide rail 8 is non-positively connected to the threaded bushing 34 and therefore to the main strut 20 and the cross strut 21. The threaded bushing 34 is positioned so that its collar 35 is located directly above the running surface 30 of the roller 29. As a result, the load on the threaded bushing 34 is transmitted via the upper web 27 to the roller 29 and therefore directly to the scissor frame 12.

[0057] FIG. 6 shows an isometric view of the cross strut 21. The slots 33 and spacers 40 surrounding the slots are shown in each of the two end regions 22. The cross strut 21 forms a U-shaped profile similar to the main strut 20. The slots 33 have a rectangular base and are surrounded by the spacers 40. The threaded bushings 34, not shown here, have a rectangular area below their collars 35 that corresponds in size to the diameter of the slots 33. As a result, the rectangular area does not completely fill the slots 33, but prevents the threaded bushings 34 from twisting relative to the slots 33 when inserted into the slots 33. The spacers 40 are also smaller than the main struts 20 so that the spacers 40 are inserted into the main struts 20. Meanwhile, the height of the cross struts 21 is greater than that of the main struts 20 so that the cross struts 21 surround the main struts 20.

[0058] FIG. 7 shows a cross section of the vehicle seat base 3 along the XZ plane. Four connection means 23 are visibly arranged in the upper frame 16. In each of the end regions 22, the connection means 23 connect the two frame parts with a first screw 38 and a bushing 34. The slide rail 8 rests on the collar 35 of the bushing 34 and is screwed into the bushing 34 with a second screw 42. Two further connection means are arranged in the central area 25. The two connection means 23 in the central area 25 do not have a second screw 42. The slide rail 8 rests only on the collar 35 of one of the two bushings 34 in the central area 25. The other connection means 23, on the other hand, does not come into contact with the slide rail 8. Therefore, the connection means 23 in the central area 25 only connects the main strut 20 and the cross strut 21, without fastening the slide rail 8. If necessary, for example, in the case of heavy loads, the slide rail 8 can also be fastened using the connecting means 23 in the central area 25. The scissor frame 12 is located between the upper and lower frames 10 and 11. Two fixed bearings 18 and a floating bearing 19 with two rollers 29 can be seen here. The rollers 29 run on the running surfaces 30 of the upper and lower frames 16 and 17. The connecting means 23 in the central area 25 is located in the path of the running surface 30 of the upper frame 16. To prevent the rollers 29 from colliding with the connecting elements 23, a stopper 45 is located between them, inside the main strut 20 formed by the webs 26, 27, and 28. The stopper 45 consists of individual rods connected to each other in a truss-like manner. When the stopper 45 and the roller 29 meet, it deforms, thus damping the movement of the roller 29 until it reaches its maximum deformation. The stopper 45 then stops the roller 29. [Explanation of symbols]

[0059] 1: Vehicle seat 2: Seat section 3: Vehicle seat base 4: Seat cushion 5: Back 6: Headrest 7: Armrest 8: Adjustment rail 9: Adjustment slide 10: Top 11: Bottom 12:Scissor frame 13: First scissor arm 14: Second scissor arm 15: Pivoting axis 16: Upper frame 17: Lower frame 18: Fixed bearing 19: Floating bearing 20: Main strut 21: Cross brace 22: End area 23: Fixture 24: Bulge 25: Central Area 26: Center bar 27: Upper bridge 28: Bottom bar 29: Displacement element 30: Running surface 31: Restriction section 32: Passage 33: Slot hole 34: Bushing 35: Color 36: First female thread 37: Second female thread 38: First screw 39: First screw head 40: Spacer 41: Additional components 42: Second screw 43: Second screw head 44: Second Passage 45: Stopper 46: Fixing screw 47: Supporting components 48: Opening

Claims

1. A vehicle seat (1) comprising a seat portion (2) and a vehicle seat base (3) having a lower portion (11) and an upper portion (12) height-adjustable relative to the lower portion (11), wherein the upper portion (12) has a frame (16) for supporting the seat portion (2) or the lower portion has a frame (17) for fastening the vehicle seat (1) to a vehicle body, and the frames (16, 17) comprise a first frame portion (20) and a second frame portion (21) connected to each other by at least one connecting means (23), 1. A vehicle seat (1) comprising a frame (16, 17) comprising a first frame portion (20) and a second frame portion (21) connected to each other by at least one connection means (23), wherein the frame (16, 17) comprises a first frame portion (20) and a second frame portion (21) connected to each other by at least one connection means (23), and wherein the at least one connection means (23) attaches an additional component (41) to the frame (16, 17).

2. 2. The vehicle seat (1) according to claim 1, characterized in that the frame (16, 17) consists of at least four frame parts arranged in a rectangular shape, the frames (16, 17) being arranged with their main extension plane perpendicular to the height direction (Z) of the vehicle seat (1).

3. The frame (16, 17) has two main struts (20) arranged parallel to each other, each having a central web (26), an upper web (27), and a lower web (28), the central web (26) being arranged between the upper web (27) and the lower web (28), the main struts (20) being U-shaped or double T-shaped in cross section perpendicular to their main extension axis, and at least two openings in each of the two main struts (20) having a U-shaped or double T-shaped cross section.

3. The vehicle seat (1) according to claim 2, characterized in that the cross struts (48) are located opposite each other in the end regions (22) of the main struts (20), the frame (16, 17) has at least two cross struts (21) connecting the two main struts (20) to each other in each case in the end regions (22) of their main extension axes, and the main struts (20) are designed to guide at least one sliding element (29), such as a roller, slider or carriage.

4. 4. The vehicle seat (1) according to claim 3, characterized in that the connecting means (23) comprise at least one screw connection, the frame (16, 17) has at least one passage (32) passing through two of the frame parts (20, 21), the passage (32) extending parallel to the height direction (Z) of the seat (1), and the at least one screw connection is arranged in the passage (32) and connects the two frame parts (20, 21) to each other non-positively.

5. 5. The vehicle seat (1) according to claim 4, characterized in that at least one bushing (34) is inserted into the passage (32) parallel to the height direction (Z) of the seat (1), the bushing (34) has a collar (35) at a first end which is larger than the diameter of the passage (32), the bushing (34) has a first internal thread (36, 37) which engages with a first thread (38) from a second end opposite the collar (35), the first thread (38) and the bushing (34) non-positively connecting at least two frame parts (20, 21) to each other.

6. 5. Vehicle seat (1) according to claim 4, characterized in that said at least one passage (32) is an elongated hole (33).

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

8. 8. The vehicle seat (1) according to claim 4, wherein at least one spacer (40) separates the upper web (27) and the lower web (28), the spacer (40) at least partially constraining the at least one passage (32) in a circumferential direction.

9. 9. Vehicle seat (1) according to claim 8, characterized in that said at least one spacer (40) forms part of said cross strut (21).

10. 2. Vehicle seat (1) according to claim 1, characterized in that the additional component (41) is at least one attachment for a seat shell arranged above the frame (16).

11. 2. The vehicle seat (1) according to claim 1, characterized in that the additional component (41) is at least one seat rail (8) or slide (9) arranged above or below the frame (16, 17).

12. 2. Vehicle seat (1) according to claim 1, characterized in that the connection means (23) simultaneously fasten the additional component (41) and non-positively connect the frame parts (20, 21).

Images