CN117751049A - Slider for a pair of seat tracks and vehicle seat - Google Patents

Abstract

The invention relates to a slider (1) for a pair of rails (3) of a longitudinal adjustment mechanism (4), comprising a base (1.1) having a lower sliding surface (1.2) and an upper sliding surface (1.3), at least the upper sliding surface (1.3) having alternating contact areas (K1, K2) along its longitudinal extent and/or a portion of the upper sliding surface having one contact area (K1, K2) each. The invention also relates to a pair of rails (3) and to a vehicle seat (10) having two pairs of seat rails (3).

Description

Slider for a pair of seat tracks and vehicle seat

Technical Field

The present invention relates to a slider for a pair of seat rails, and a pair of seat rails and a vehicle seat.

Background

The prior art includes seat track systems that use balls to support a longitudinal adjustment mechanism for longitudinal adjustment of one track profile relative to another track profile. Here, the balls have a low longitudinal displacement force due to a low rolling friction. The disadvantage here is that the rolling of the balls changes their longitudinal position relative to the rail profile during the longitudinal adjustment. The longer the longitudinal adjustment stroke, the greater the rolling stroke. The margin of the rolling travel must be left and this reduces the possible bearing pitch of the balls. As a result, the adjustment travel cannot exceed 350mm.

Another disadvantage is known as "brinelling", i.e. the entry of the balls into the track material under high load. As a result, the balls may leave an impression in the track of the track profile. During subsequent adjustments, the occupant may feel these indentations from uneven displacement forces. Moreover, after a long time of unchanged seat position, the force required for the first adjustment process may increase significantly, and this is perceived as inconvenient.

For example, DE 10 2016 217 945.4 discloses a slider which is designed to be fixed to the lower rail and is therefore considerably longer than the upper rail profile. Furthermore, balls are mounted in the upper track to ensure that the displacement force of the track does not rise too much due to tolerances.

WO 2016/059108 A1 discloses a sliding element as a separate component, which consists of two parts and different materials. During assembly, this leads to the problem that the individual sliding elements may be damaged during assembly of the rail system.

Disclosure of Invention

Problem(s)

The problem addressed by the present invention is to provide an improved slider for a sliding mechanism for a pair of seat tracks in which plastic deformation of the mechanism ("brinell indentation") is largely avoided. Furthermore, it is an object of the present invention to provide a pair of seat rails with improved sliders, such as sliding bearings, and a vehicle seat with an improved pair of seat rails.

With regard to the slider, this problem is solved according to the invention by the features specified in claim 1. With respect to a pair of rails, this problem is solved according to the invention by the features specified in claim 9. With regard to the vehicle seat, this problem is solved according to the invention by the features specified in claim 12.

Solution scheme

The slider according to the invention comprises at least one base portion having a lower sliding surface and an upper sliding surface, wherein at least the upper sliding surface has respective alternating and/or zoned contact areas along its longitudinal extent.

The slider may be arranged in a track formed between two tracks, for example a lower and an upper track, in particular a floor track and a seat track.

In this case, the slider may contact the rail in the lower track through the lower sliding surface and may contact the rail in the upper track through the upper sliding surface. The lower track and the upper track may extend in a longitudinal direction of the track. The lower track and the upper track may be connected to each other.

The lower sliding surface may have a rigid design at least in a certain area or areas. Additionally or alternatively, the lower sliding surface may have contact areas arranged in an alternating manner. At least the upper sliding surface has alternating contact areas. In the upper track, the contact areas alternately contact the upper track and the lower track.

Due to the fact that the contact areas are arranged alternately or in an alternating manner, they may be elastic. Whereby tolerances can be compensated for. For example, the upper sliding surface may have a first, e.g. upper, contact area and a second, e.g. lower, contact area. Their arrangement alternates in the longitudinal direction of the track.

In order to ensure a preload of the contact area even during the service life and during temperature fluctuations, additional spring elements can be introduced. The spring element may be formed, for example, from a flat strip of spring steel wire or sheet steel.

The advantage achieved by the invention lies in particular in the fact that the sliding mechanism is formed without balls and thus plastic deformation is reliably avoided. Furthermore, the structure of the sliding mechanism is particularly simple and inexpensive. Such a sliding mechanism in the form of a slider allows for a large support length and is easy to assemble. Furthermore, this is possible for long adjustment strokes of the seat rail.

One of the sliding surfaces may be designed to have a rigid design and the other sliding surface may be designed to be different in rigidity and/or flexibility between different areas.

The sliding mechanism is formed by a slide block, which comprises at least one base part extending substantially in the longitudinal direction and having a lower sliding surface and an upper sliding surface in the vertical direction, wherein the lower sliding surface has a rigid design and the upper sliding surface is designed to be different in rigidity and/or flexibility between different areas.

Due to the different rigidity and/or elasticity of the upper sliding surface, the slider may be contacted by the upper rail or the lower rail of the pair of seat rails in a partitioned manner in the upper track of the pair of seat rails, in particular in an alternating manner or alternately.

The different rigidities and/or elasticity are achieved by the shape and configuration of the upper sliding surface.

For example, the upper sliding surface may have regions of different materials and/or regions of different shapes.

In another embodiment, the base part and the sliding surface are designed as a one-piece sliding body, sliding bearing or sliding mechanism.

In another embodiment, the lower sliding surface is designed at least in some areas as a solid body area and/or in the form of a profile. The lower sliding surface forms a rigid, in particular stable and strong, support surface for the slider. The lower sliding surface, seen in cross section, forms a substantially circular, oval or fully spherical surface, e.g. a circular or spherical surface, at least in a certain or certain sections. The lower sliding surface is arranged to contact and support the rail profiles of a pair of rails in a plurality of areas. Solid body areas represent, for example, surfaces filled with a material, in particular a low friction plastic, such as Polyoxymethylene (POM). Alternatively or in addition, the lower sliding surface may additionally be designed as a hollow body in a certain or certain areas.

In another embodiment, the lower sliding surface has a segmented design and includes a plurality of recesses spaced apart from one another. The recess is for example a cutting area and/or a punching area. The recess is used for saving material. For example, a slide with a greatly reduced weight is thereby produced.

In another embodiment, the lower sliding surface has two contact areas at least in the first sliding section. For example, the contact area extends along the longitudinal extent of the lower sliding surface. If the lower sliding surface comprises recesses, the sections between the recesses form sliding sections. The sliding section forms a solid body region and/or a region in the form of a profile. The sliding section or sections have a completely circular design. The sliding section may also comprise a plurality of contact areas formed by circumferences.

The sliding section is formed of, for example, a cylindrical section. The at least two contact areas are defined by lateral surfaces of the respective sliding sections or segments.

In another embodiment, the upper sliding surface is designed to be at least partially solid in one or some areas. The upper sliding surface forms a semi-circular surface when viewed in cross section. Solid body areas represent, for example, surfaces filled with a material, in particular a low friction plastic, such as Polyoxymethylene (POM). For example, the upper sliding surface comprises at least one sliding section, which is designed as a semicircular or crescent or hemispherical or semi-cylindrical surface when seen in cross-section. Alternatively or in addition, the upper sliding surface may additionally be designed as a partially hollow body in a certain area or areas.

In another embodiment, the upper sliding surface has only one contact area along its longitudinal extent in an alternating and/or zoned manner. The alternating contact areas of the slider with the upper track or the lower track give the sliding surface elasticity. Whereby tolerances can be compensated for. The contact region is formed by a rounded or curved surface of the sliding section, which is designed to be semicircular and in particular shaped. In an alternating manner and/or zoned, the upper sliding surface includes a generally upwardly oriented contact region and a generally downwardly oriented contact region. For example, the upper sliding surface comprises at least two contact areas arranged 180 ° offset relative to each other.

The sliding block acts here as a sliding bearing, which can withstand high loads without being damaged by brinell indentations, which can occur, for example, in the case of high loads on rolling bearings.

The slider according to the invention is designed as a separate component of a rail system that can be used in a number of ways. The slide is a profile element, in particular a C-shaped profile element.

The contact area of the upper sliding surface is formed by a partially formed solid body area. In particular, the contact area is formed by the outer circumferential surface of a semicircular solid body area.

In another embodiment, the slider comprises two slider bars arranged one above the other in the vertical direction. The slider bars each form a sliding surface. The slider bar extends in the direction of the longitudinal extent. The slider bars are connected to each other, for example, via a base portion, which forms a middle section or a central connection section. The support of the upper rail on the slider bar or its sliding surface reduces friction between the upper rail and the slider compared to a large area support of the upper rail on the slider.

In another embodiment, the slider bar and the base portion are of unitary design. For example, the slider bar and the base portion are made of one piece and/or material, in particular of the same piece and/or material. The slide is injection molded, for example. The upper slider bar includes alternating contact areas. For example, the upper slider bar includes a plurality of semicircular sliding sections.

In another embodiment, the upper sliding surface is provided with an additional spring element at least in a certain or some areas. Thereby, a preloading of the relevant contact area can be ensured even during service life and during temperature fluctuations. The spring element may be formed by a spring wire or a spring steel sheet, for example a flat strip of spring steel sheet in particular.

This problem is solved according to the invention by the fact that for a pair of seat rails for a longitudinal adjustment mechanism, the pair of rails comprises at least two rail profiles as described above and at least one slider.

For another pair of seat rails, the problem is solved according to the invention by the fact that the pair of rails comprises at least two rail profiles and one or two sliders, wherein the respective slider comprises at least one base portion having a lower sliding surface and an upper sliding surface, wherein one of the sliding surfaces has contact areas along its longitudinal extent, which contact areas are arranged in an alternating and/or zoned manner, each being assigned to one of the two rail profiles and contacting one of the two rail profiles. As a result, a sliding surface, such as an upper sliding surface, is largely of flexible and/or resilient design. The contact area is formed by the sliding section. Unlike conventional spherical rolling elements, the sliding section or contact area supports or contacts two rail profiles. The sliding section or contact area is designed as a semicircle or hemisphere and can be moved in a substantially flexible and/or elastic manner in a direction not contacting the rail profile. In the assembled state, one contact region is in contact with the associated rail profile and at a distance from the other rail profile.

One of the rail profiles is movably coupled to the other rail profile via two slides and is adjustable relative to the other rail profile. The sliding surfaces are each arranged in an upper and a lower track.

In a further embodiment of the pair of rails, the lower sliding surface has two contact areas, each contacting one of the two rail profiles, in particular contacting them simultaneously.

In a first embodiment, the length of the respective slider may extend along the total length of the upper track profile. Alternatively, the respective slide can be designed to be shorter than the upper rail profile. In the case of the upper rail profile, which is formed over its entire length, the respective slide is fixed relative to the upper rail profile, in particular fixed to prevent adjustment, and is only longitudinally movable relative to the lower rail. Such an embodiment has a maximum support length, wherein the lower track profile also surrounds the upper track profile in the foremost and rearmost longitudinal setting profiles. If the slider is shorter than the upper rail profile, a relative movement can take place between the slider and the upper rail profile. As a result, the length of the lower rail or lower rail profile can be made shorter, since the upper rail or upper rail profile can be moved out of the lower rail or lower rail profile.

The alternating contact areas of the upper sliding surface may also have an insertion bevel to allow for simple assembly of a pair of seat tracks.

The vehicle seat according to the invention comprises two of the above-mentioned pairs of seat rails, which are arranged in particular parallel to one another, wherein the respective upper rail profile is firmly connected to one seat part of the vehicle seat.

Reference numerals

Illustrative embodiments of the invention are explained in more detail by the accompanying drawings. In the drawings:

figure 1 shows a perspective view of an adjustable vehicle seat with a longitudinal adjuster,

figures 2 and 3 each schematically show a perspective view of a slider for a pair of seat tracks,

figure 4 shows a schematic side view of a slider,

figures 5 to 8 show various cross-sectional views of the slider according to figure 2,

figure 9 schematically shows a top plan view of the slider,

figure 10 shows a schematic cross-section of the upper sliding region of the slider,

fig. 11 shows schematically an exploded view of a pair of seat rails, having two rail profiles and two sliders arranged between the latter,

figures 12 to 17 show various schematic views of an upper rail profile with a laterally arranged slider,

fig. 18 to 23 show various schematic views of a pair of seat rails, having upper and lower rail profiles and two sliders arranged between the latter,

fig. 24 to 29 show various schematic views of a longitudinal adjustment mechanism with a pair of seat rails with an upper rail profile and a lower rail profile and two slides arranged between the latter, and an actuation drive

Fig. 30 to 33 show various schematic views of a pair of seat rails with two sliders, which are fixed or can be fixed on an upper rail profile.

Detailed Description

In all the figures, mutually corresponding parts have the same reference numerals.

The vehicle seat 10 schematically shown in fig. 1 is described hereinafter using three spatial directions extending perpendicularly to each other. In the case where the vehicle seat 10 is mounted in a vehicle, the longitudinal direction x extends mainly horizontally and is preferably parallel to the vehicle longitudinal direction corresponding to the normal running direction of the vehicle. The transverse direction y extending perpendicular to the longitudinal direction x is likewise aligned horizontally in the vehicle and extends parallel to the vehicle transverse direction. The vertical direction z extends perpendicular to the longitudinal direction x and perpendicular to the transverse direction y. With the vehicle seat 10 installed in a vehicle, the vertical direction z extends parallel to the vehicle vertical axis.

The position and direction indications used, such as front, rear, top and bottom, refer to the direction of view of a passenger sitting in the vehicle seat 10 in a normal seating position, wherein the vehicle seat 10 is in a position suitable for transporting a person when mounted in a vehicle, with an upright backrest 12, aligned in the direction of travel in a conventional manner. However, the vehicle seat 10 according to the invention can also be mounted in different alignments, for example transversely to the direction of travel.

The vehicle seat 10 has a seat portion 13 and a backrest 12, the inclination of which relative to the seat portion 13 is adjustable and which can be pivoted forward in the direction of the seat portion 13.

In order to make the vehicle seat 10 longitudinally movable and longitudinally adjustably attachable in the vehicle, the vehicle seat 10 has a longitudinal adjustment mechanism 14 (also simply referred to as a longitudinal adjuster).

The longitudinal adjustment mechanism 14 is used for longitudinal adjustment, i.e., adjustment of the longitudinal seat position of the vehicle seat 10. For this purpose, the longitudinal adjustment mechanism 14 has a pair of seat rails 3 on each side of the vehicle seat. One pair of seat rails 3 is arranged on the tunnel side, and the other pair of seat rails 3 is arranged on the rocker side of the vehicle. The two pairs of seat rails 3 of the longitudinal adjustment mechanism 14 extend parallel to each other. Each pair of seat rails 3 has an upper rail profile 3.1 (also called seat rail or upper rail) which can be connected to the vehicle seat 10 and a lower rail profile 3.2 (also called floor rail) which can be connected to the vehicle floor.

The seat rail or upper rail profile 3.1 is guided in such a way that it can move in the longitudinal direction x relative to the lower rail profile 3.2 or the floor rail 6.

Fig. 2 and 3 show perspective views of the slider 1, respectively. As described in more detail below, two sliders 1 are provided for each pair of rails 3.

The respective slider 1 comprises at least one base portion 1.1.

The base portion 1.1 extends substantially in the longitudinal direction x. The base part 1.1 comprises a lower sliding surface 1.2 and an upper sliding surface 1.3 in the vertical direction z.

The lower sliding surface 1.2 has a substantially rigid design. For example, the lower sliding surface 1.2 is designed as a solid body area and/or in the form of a profile. The lower sliding surface 1.2 may be designed as a solid body area or in some areas in the form of a profile. The lower sliding surface 1.2 extends in the longitudinal direction x to a large extent over the entire length of the base portion 1.1. Furthermore, the lower sliding surface 1.2 may be segmented and/or may have material recesses. Additionally or alternatively, the lower sliding surface 1.2 may have different sizes and/or shapes. For example, the lower sliding surface 1.2 may have a dimension, e.g. a reduced diameter, decreasing from one longitudinal end towards the center along the longitudinal extent, and may have a dimension, e.g. an increased diameter, increasing from the center to the opposite longitudinal end. A particularly light slider 1 can thereby be formed.

The upper sliding surface 1.3 is designed to be rigid and/or flexible between different areas.

The base part 1.1 and the lower and upper sliding surfaces 1.2,1.3 are designed as one piece, in particular as a shaped part, for example as an injection molded piece made of plastic, and form an integrated slide in the form of a slide block 1. In particular, the integrated slider 1 is formed of a low friction plastic material.

Such a slider 1 is designed without balls and thus plastic deformation is reliably avoided.

Fig. 4 shows a side view of one of the sliders 1.

For example, the lower sliding surface 1.2 may have a segmented design. For example, the lower sliding surface 1.2 comprises a plurality of spaced apart recesses 1.2.1. In this case, the length of the section of the lower sliding surface 1.2 in the longitudinal direction x is greater than the length of the recess 1.2.1 between the segments. The recess 1.2.1 serves to save material, thus making the slider 1 correspondingly lighter.

At least in the longitudinal end regions 1.3.1, the upper sliding surface 1.3 is designed to be different in rigidity and/or flexibility between the different regions, and the lower sliding surface 1.2 is segmented along the longitudinal direction x and may have different shapes and/or dimensions, as shown by way of example in fig. 5 to 8 by the sliding sections G1 to G4.

Figures 5 to 8 show in detail cross-sectional views A-A, B-B, C-C and D-D of figure 4.

Fig. 5 shows in a section A-A first sliding section G1 of the slide 1, which has the lower and upper sliding surfaces 1.2,1.3 as solid areas, in particular substantially solid circular areas, which have a substantially rigid design. The base part 1.1 and the lower and upper sliding surfaces 1.2,1.3 are made of a single material, in particular a low friction plastic such as Polyoxymethylene (POM).

In this case, the lower sliding surface 1.2 is designed in all sliding sections G1 to G4 in such a way that this lower sliding surface 1.2 always has two contact areas K1 and K2. The sliding section denoted G1 is in each case the end section of the lower sliding surface 1.2. All sliding sections G1 to G4 have a circular or spherical design in cross section.

In the first sliding section G1, the upper sliding surface 1.3 has two contact areas K1 and K2. The first sliding section G1 is an end section which has a circular or spherical design in cross section in order to be in contact with and/or to be supported on holding tabs 3.14 formed on the upper rail profile 3.1, as shown in fig. 30 to 32.

The upper sliding surface 1.3 has, in an alternating manner along its longitudinal extension, a contact region K1 (third sliding section G3, fig. 7) or K2 (second sliding section G2, fig. 6), two contact regions K1, K2 (first sliding section G1, fig. 5), or no contact region K1, K2 (fourth sliding section G4, fig. 8).

Fig. 6 shows in a sectional view B-B a second sliding section G2 of the slide 1, which has differently designed lower and upper sliding surfaces 1.2, 1.3.

The lower sliding surface 1.2 is designed as a solid body region, in particular a substantially rigid substantially solid circular region. The lower sliding surface 1.2 has two contact areas K1, K2.

The upper sliding surface 1.3 is designed partly as a solid area, in particular as a semicircular area. As a result, the upper sliding surface 1.3 has a lower stiffness and a correspondingly flexible, in particular movable or elastic, design.

The base part 1.1 and the lower and upper sliding surfaces 1.2,1.3 are made of a single material, in particular a low friction plastic.

In this second sliding section G2, the upper sliding surface 1.3 is additionally provided with at least one spring element 2. For example, the spring element 2 is arranged below the upper sliding surface 1.3. The outer upper sliding surface 1.3 made of plastic forms an outer contact area K2.

The spring element 2 is formed and arranged below the upper sliding surface 1.3 in order to provide an outwardly directed preloading force. In this way, a sufficiently large preload on the less rigid, in particular flexible, sliding region can be ensured for adequate contact of the outer contact region K2 even during the service life and during temperature fluctuations.

The spring element 2 may be formed by a spring wire or a spring steel sheet, for example a flat strip of spring steel sheet in particular. The spring element 2 extends over the entire second sliding section G2 or only over some areas of this second sliding section G2 in the upper sliding surface 1.3.

Fig. 7 shows in a sectional view C-C a third sliding section G3 of the slide 1, which has differently designed lower and upper sliding surfaces 1.2, 1.3.

The lower sliding surface 1.2 is designed as a profile area with a material recess 1.2.2, in particular a substantially H-shaped profile. Alternatively, the lower sliding surface 1.2 may have other shapes and/or dimensions that save material. For example, the lower sliding surface 1.2 may alternatively have a smaller diameter in the third sliding section G3 than in the first and second sliding sections G1, G2.

The upper sliding surface 1.3 is designed partly as a solid profile area, in particular as a semicircular area. As a result, the upper sliding surface 1.3 has a lower stiffness and a correspondingly flexible, in particular movable or elastic, design.

The base part 1.1 and the lower and upper sliding surfaces 1.2,1.3 are made of a single material, in particular a low friction plastic.

In this third sliding section G3, the upper sliding surface 1.3 is additionally provided with at least one spring element 2. For example, the spring element 2 is arranged above the upper sliding surface 1.3. The inner upper sliding surface 1.3 made of plastic forms an inner contact area K1.

The spring element 2 is designed and arranged above the upper sliding surface 1.3 in order to provide an inwardly directed preloading force. In this way, a sufficiently large preload on the less rigid, in particular flexible, sliding region can be ensured for adequate contact of the inner contact region K1 even during the service life and during temperature fluctuations.

The spring element 2 may be formed by a spring wire or a spring steel sheet, for example a flat strip of spring steel sheet in particular. The spring element 2 extends over the entire third sliding section G3 or only over some areas of this third sliding section G3 in the upper sliding surface 1.3.

Fig. 8 shows in a sectional view D-D a fourth sliding section G4 of the slide 1, which has differently designed lower and upper sliding surfaces 1.2, 1.3.

The lower sliding surface 1.2 is designed as a solid body region, in particular a substantially rigid substantially solid circular region.

The upper sliding surface 1.3 is designed partly as a profile area, in particular an I-shaped area. As a result, the upper sliding surface 1.3 has a lower stiffness and a correspondingly flexible, in particular movable or elastic, design.

The base part 1.1 and the lower and upper sliding surfaces 1.2,1.3 are made of a single material, in particular a low friction plastic.

In this fourth sliding section G4, the upper sliding surface 1.3 is additionally provided with at least one additional spring element 2. Thus, even during the service life and during temperature fluctuations, a preload on the less rigid, in particular flexible, sliding region can be ensured. The spring element 2 may be formed by a spring wire or a spring steel sheet, for example a flat strip of spring steel sheet in particular. The spring element 2 extends over a fourth sliding section G4 in the upper sliding surface 1.3.

Fig. 9 shows a top plan view of a slider 1 with four sliding sections G1 to G4 of the upper sliding surface 1.3. In this case, the slide sections G1 to G4 are provided at the end portions of the slider 1, respectively. In particular, the first sliding section G1 is located at the outer end of the slider 1, with two contact areas K1 and K2 in the lower and upper sliding surfaces 1.2 and 1.3, respectively, as shown in fig. 5.

The central sliding section G5 is purely for support and spacing. This central sliding section G5 may have contact areas K1, K2; alternatively, it may be configured to be non-contact in some areas. The outermost first sliding section G1 is intended for reliable contact and therefore has a complete surface area and correspondingly large dimensions and shape. The second to fourth sliding sections G2 to G4 arranged between the first sliding section G1 and the central sliding section G5 may have a reduced size, shape and/or surface area of a half or profile shape. In addition, the third and fourth sliding sections G3, G4 are provided with, for example, at least one spring element 2 or a plurality of spring elements 2 to provide a preload. The spring element 2 can extend over a plurality of sliding sections G3, G4. The spring element 2 is, for example, a spring wire or a spring steel sheet.

Fig. 10 shows a schematic sectional view EE through the upper sliding surface 1.3, wherein one slider 1 has a plurality of sliding sections G1 to G5. At the ends, the slide 1 has a corresponding first sliding section G1 which has a solid profile and no spring steel sheet provides two contact areas K1, K2—an inner contact area K1 and an outer contact area K2. Towards the inside, in each case there is an adjoining second sliding section G2 with an inner contact area K1. Adjacent to each of these inner second sliding sections G2 is a fourth sliding section G4 which is not in contact. The third sliding sections G3 with the outer contact area K2 are arranged between these fourth sliding sections G4.

The spring element 2 may extend over the entire length of the second, third and fourth sliding sections G2 to G4. The plastic material of the slide 1, in particular the solid body area or profile area of the upper sliding surface 1.3, can be arranged in an alternating manner on different sides of the spring element 2, in particular above and/or below the spring element 2 along the spring element 2. By this alternating arrangement of the plastic material with respect to the spring element 2, the inner contact region K1 and the outer contact region K2 and/or the two contact regions K1 and K2 are formed in an alternating manner.

Fig. 11 shows an exploded view of a pair of seat rails 3.

The pair of seat rails 3 comprises an upper rail profile 3.1 and a lower rail profile 3.2. The two rail profiles 3.1 and 3.2 are movably coupled to one another by two slides 1 of the type described above by way of example with reference to fig. 2 to 10.

In the exemplary embodiment shown, the upper rail profile 3.1 can be moved longitudinally relative to the lower rail profile 3.2 by means of the slide 1 and can be adjusted in the longitudinal direction x.

In the first embodiment, the length of the respective slider 1 can extend along the total length of the upper rail profile 3.1. Alternatively, the respective slide 1 can be designed to be shorter than the upper rail profile 3.1.

In the case where it is formed over the entire length of the upper rail profile 3.1, the respective slide 1 is fixed relative to the upper rail profile 3.1. For this purpose, the respective slide 1 is fastened or fixed to the upper rail profile 3.1 and can be moved together with the latter relative to the lower rail profile 3.2, in particular adjusted longitudinally.

Such an embodiment has a large support length, wherein the lower rail profile 3.2 also surrounds the upper rail profile 3.1 in the foremost and rearmost longitudinal setting profiles.

The pair of seat rails 3 is embodied at least approximately plane-symmetrically with respect to a plane of symmetry SE containing the longitudinal axis LA and perpendicular to the drawing plane of fig. 2.

The lower rail profile 3.2 has a lower rail bottom 3.21 and on each side of the symmetry plane SE has lower rail flanks 3.22 at an angle to the lower rail bottom 3.21 and lower rail end sections 3.23 angled inwardly (i.e. towards the symmetry plane SE) and rearwardly (i.e. towards the lower rail bottom 3.21) from the lower rail flanks 3.22.

The upper rail profile 3.1 has an upper rail middle section 3.11 and on each side of the symmetry plane SE an upper rail flank 3.12 at an angle to the upper rail middle section 3.11 and an upper rail end section 3.13 at an angle outwards (i.e. away from the symmetry plane SE) and upwards (i.e. away from the lower rail bottom 3.21) from the upper rail flank 3.12. The upper rail middle section 3.11 extends parallel to the lower rail bottom 3.21 above the lower rail profile 3.2. Each upper rail flank 3.12 has a region extending between the lower rail ends 3.23. Each upper track end section 3.13 protrudes at an angle to the lower track end section 3.23 into the region of space between the lower track flank 3.22 and the lower track end section.

The upper rail profile 3.1 and the lower rail profile 3.2 are each made of, for example, a metallic material.

The slider 1 described in detail above with reference to fig. 2 to 10 is placed laterally against the two outer upper rail end sections 3.13. During assembly of the pair of seat rails 3, the upper rail profile 3.1 and the lower rail profile 3.2 with the laterally applied slide blocks 1 are inserted into each other and pushed together.

Due to the difference in the rigidity and/or elasticity of the upper sliding surfaces 1.3, the slider 1 can be in contact with the upper rail profile 3.1 or the lower rail profile 3.2 in some areas in an upper track LO of a pair of seat rails 3 (said track being shown in more detail in fig. 18 to 20), in particular in an alternating manner or alternately, as is shown below by way of the various examples in fig. 12 to 29. By alternating the contact areas K1, K2, these contact areas can be embodied as elastic and spring-preloaded. Whereby tolerances can be compensated for.

Fig. 12 to 17 show various schematic views of an upper rail profile 3.1 with a laterally arranged slide 1.

Fig. 12 to 14 show sectional views of different sliding sections G2 and G3 of the slide 1, which are arranged transversely on the upper rail profile 3.1. In the sliding sections G2 and G3, the lower sliding surface 1.2 of the slider 1 always has an inner contact area K1 with respect to the upper rail profile 3.1. In contrast, the upper sliding surface 1.3 has an inner contact region K1 with respect to the upper rail profile 3.1 only in the third sliding section G3. In the second sliding section G2, the upper sliding surface 1.3 has only the outer contact region K2 with respect to the lower rail profile 3.2, as shown in fig. 18 and 19.

Fig. 15 to 17 show a longitudinal section through the upper rail profile 3.1 with the laterally arranged slide blocks 1 and the respective slide sections G1 to G5, a side view and a plan view from above the upper rail middle section 3.11.

Fig. 18 to 23 show different schematic views of a pair of seat rails 3 with upper and lower rail profiles 3.1,3.2 in the installed state, with two sliders 1 arranged between them, in various sectional views according to fig. 18 to 20, as well as longitudinal sectional, side and top views of the upper rail intermediate section 3.11 shown in fig. 21, 22 and 23, respectively.

In the second sliding section G2 according to fig. 18 and 19, the two sliding blocks 1 are in contact with the lower rail profile 3.2 in the upper and lower trajectories LO, LU via the outer contact region K2 by both the lower sliding surface 1.2 and the upper sliding surface 1.3. In this case, the upper sliding surface 1.3 has a spring preloaded design in order to provide the outer contact area K2 with the lower rail profile 3.2. For this purpose, the spring element 2 is arranged below the upper sliding surface 1.3. The slider 1 is in contact with the upper rail profile 3.1 only by its lower sliding surface 1.2 via the inner contact region K1.

In the third sliding section G3 according to fig. 20, the two sliding blocks 1 are in contact with the upper rail profile 3.1 in the upper track LO and the lower track LU via the inner contact region K1 by both the lower sliding surface 1.2 and the upper sliding surface 1.3. In this case, the upper sliding surface 1.3 has a spring preloaded design in order to provide the inner contact area K1 with the upper rail profile 3.1. For this purpose, the spring element 2 is arranged above the upper sliding surface 1.3. The slider 1 is in contact with the lower rail profile 3.2 only by its lower sliding surface 1.2 via the outer contact region K2.

Fig. 21 to 23 show an exemplary embodiment with a shorter upper rail profile 3.1 compared to a longer lower rail profile 3.2.

Fig. 24 to 29 show various schematic views of a longitudinal adjustment mechanism 4 with a pair of seat rails 3 with upper and lower rail profiles 3.1,3.2 and two sliders 1 arranged between the latter and an actuation drive 5.

Fig. 30 to 33 show various schematic views of an upper rail profile 3.1 of a pair of seat rails 3 with two sliders 1, which are fastened or can be fastened to the upper rail profile 3.1.

For this purpose, the upper rail profile 3.1 has an outwardly oriented holding tab 3.14 at its end, in particular at its end face, with which the upper sliding surface 1.3 of the slide 1 comes into stop contact in the longitudinal direction x. In this case, each upper rail end section 3.13 has an outwardly oriented holding tab 3.14 at both longitudinal ends when viewed in the longitudinal direction x, and thus each slider 1 is fastened transversely to the respective upper rail end section 3.13 between the two holding tabs 3.14 in the longitudinal direction x.

If the slide 1 is shorter than the upper rail profile 3.1, a relative movement with respect to the upper rail profile 3.1 is likewise possible. This allows the length of the lower track profile 3.2 to be shorter, since the upper track profile 3.1 can be moved out of the lower track profile 3.2.

The alternating contact areas K1, K2 may also have an insertion bevel in order to allow a simple assembly of a pair of seat rails 3.

List of reference numerals

1. Sliding block

1.1 Base portion

1.2 Lower sliding surface

1.2.1 Concave part

1.2.2 Material recess

1.3 Upper sliding surface

1.3.1 Longitudinal end regions

2. Spring element

3. A pair of seat rails

3.1 Upper rail section bar

3.11 Upper track middle section

3.12 Upper rail flank

3.13 Upper rail end section

3.14 Holding tab

3.2 Lower track section bar

3.21 Bottom of lower rail

3.22 Lower rail side wing

3.23 Lower track end section

4. Longitudinal adjusting mechanism

5. Actuating drive

10. Vehicle seat

12. Backrest for chair

13. Seat part

14. Longitudinal adjusting mechanism

A-A, B-B, C-C, D-D, E-E cross-sectional view

G1, G2, G3, G4 sliding sections

G5 Center sliding section

K1 Internal contact area

K2 External contact area

LA longitudinal axis

LO upper trace

LU lower track

Plane of SE symmetry

x longitudinal direction

y transverse direction

z vertical direction

Claims (12)

1. Slider (1) for a pair of rails (3) of a longitudinal adjustment mechanism (4), comprising at least one base portion (1.1) having a lower sliding surface (1.2) and an upper sliding surface (1.3), wherein at least the upper sliding surface (1.3) has respective alternating and/or partitioned contact areas (K1, K2) along its longitudinal extent.

2. Slider (1) according to claim 1, wherein one of the sliding surfaces (1.2, 1.3) has a rigid design and the other sliding surface (1.2, 1.3) is designed to be different in rigidity and/or flexibility between different areas.

3. Slider (1) according to claim 1 or 2, wherein the base part (1.1) and the sliding surface (1.2, 1.3) are designed as a one-piece slider.

4. Slider (1) according to one of the preceding claims, wherein the lower sliding surface (1.2) is designed at least in a certain or some areas as solid body area and/or in the form of a profile.

5. Slider (1) according to one of the preceding claims, wherein the lower sliding surface (1.2) has a segmented design and comprises a plurality of mutually spaced recesses (1.2.1).

6. Slider (1) according to one of the preceding claims, wherein the lower sliding surface (1.2) has two contact areas (K1, K2) at least in the first sliding section (G1).

7. Slider (1) according to one of the preceding claims, wherein the upper sliding surface (1.3) comprises, at least in a certain or certain areas, substantially semicircular sliding sections (G1 to G4).

8. Slider (1) according to one of the preceding claims, wherein the upper sliding surface (1.3) is provided with at least one spring element (2) at least in a certain or certain areas.

9. A pair of rails (3) for a longitudinal adjustment mechanism (14), comprising at least two rail profiles (3.1, 3.2) and at least one slider (1), which slider comprises at least one base part (1.1) having a lower sliding surface (1.2) and an upper sliding surface (1.3), wherein one of the sliding surfaces (1.2, 1.3) has contact areas (K1, K2) arranged in an alternating and/or zoned manner along its longitudinal extent, which contact areas are each assigned to one of the two rail profiles (3.1, 3.2) and contact one of the two rail profiles (3.1, 3.2).

10. A pair of rails (3) according to claim 9, wherein one of the rail profiles (3.1, 3.2) is movably coupled to the other rail profile (3.1, 3.2) via the slider (1) and is adjustable relative to the other rail profile (3.1, 3.2), wherein the sliding surfaces (1.2, 1.3) are arranged in an upper track (LO) and a lower track (LU), respectively.

11. A pair of rails (3) according to any of the claims 9 or 10, wherein the lower sliding surface (1.2) has two contact areas (K1, K2) which contact one of the two rail profiles (3.1, 3.2) respectively.

12. A vehicle seat (10) comprising two pairs of rails (3) according to one of claims 9 to 11.