Bottom rail, rail pair and seat longitudinal adjustment device

Abstract

Lower rail (32) for a pair of rails (3) of a seat longitudinal adjustment device (2), comprising at least two side walls (322) and a web (321) connecting the side walls (322), wherein at least one of the side walls (322) has a receiving profile (6, 60, 600) for receiving and guiding a connecting cable (5) or cable bundle or cable housing along a longitudinal extension of the lower rail (32), wherein the side wall (322) has at least one locking surface (61 to 63) and the receiving profile (6, 60, 600) is designed as a guide channel or guide groove between the locking surface (61 to 63) and the side wall (322), wherein the web (321) has lower inner rolling surfaces (325) on which adjustment elements (41) of an upper rail (31) can roll, wherein a lower locking surface (62, 63) is formed by one of the rolling surfaces (325) is formed.

Description

[0001] The invention relates to a lower rail for a pair of rails of a seat longitudinal adjustment device, for example of a vehicle seat. Furthermore, the invention relates to a pair of rails with such a rail and a seat longitudinal adjustment device with such a pair of rails.

[0002] A seat longitudinal adjustment device generally comprises two pairs of rails spaced apart from each other, each pair consisting of two rails: an upper rail associated with the seat and a lower rail associated with the vehicle floor. The seat longitudinal adjustment device can be electrically adjustable. For this purpose, the device includes, for example, an adjustment unit and a drive unit for electrically driving the adjustment unit, with the drive unit being powered via at least one connecting cable. For long adjustment ranges, the connecting cable must be able to move securely and with low friction along a rail profile.

[0003] A seat longitudinal adjustment device with a separate energy supply chain, which is mounted on a rail, is known from EP 3 907 102 A1.

[0004] A seat longitudinal adjustment device equipped with a power supply is known from DE 10 2019 216 592 B3.

[0005] Furthermore, the use of sliding contacts in rail profiles is known from the prior art. A power supply to a rail runner of a rail pair is provided via the sliding contacts.

[0006] The object of the present invention is to provide an improved lower rail for a pair of rails of a seat longitudinal adjustment device, in which a connecting cable and / or a cable arrangement, for example a cable bundle or cable housing, can be guided securely and without friction. Furthermore, it is an object of the present invention to provide an improved pair of rails and an improved seat longitudinal adjustment device compared to the prior art.

[0007] With regard to the lower rail, the problem is solved according to the invention with a lower rail having the features of claim 1. With regard to the rail pair, the problem is solved according to the invention with a rail pair having the features of claim 13. With regard to the seat longitudinal adjustment device, the problem is solved according to the invention with a seat longitudinal adjustment device having the features of claim 14.

[0008] The bottom rail according to the invention, for example a floor rail, for a pair of rails of a seat longitudinal adjustment device of a seat, in particular a vehicle seat, is for example essentially U-shaped, wherein the rail has at least two side walls and a web connecting the side walls, wherein at least one of the side walls has a receiving profile for receiving and guiding a connecting cable or cable bundle or cable housing along the longitudinal extent of the rail.

[0009] For long adjustment ranges, the connecting cable, cable bundle, or cable housing must be able to move securely and with low friction along a rail profile. The rail according to the invention provides a largely friction-free and secure guidance of the connecting cable, or of a cable harness or cable string consisting of several connecting cables.

[0010] The rail according to the invention also makes it possible to guide the connecting cable over comparatively long adjustment ranges. A pair of rails comprising the rail according to the invention can, for example, be designed to cover several rows of seats in a vehicle. A movable rail, for example a so-called rail runner and / or top rail, of the rail pair can, for example, travel an adjustment range of at least 1,300 mm. It is ensured that the movable rail is supplied with power over the entire length of the rail pair.

[0011] The rail according to the invention is a vehicle-mounted underrail, also called a floor rail. The movable rail, also called a rail runner, is relatively movable relative to the underrail. The rail runner is coupled, for example, to a seat, in particular a vehicle seat. Safety components, such as airbags, controllable seat belt tensioners and / or seat belt warning devices, or other safety-relevant functional components, are arranged in and / or on the seat. By means of the underrail according to the invention with its mounting profile, a power supply to the seat is ensured independently of any adjustment and / or position of the seat or the movable rail along the underrail. The connecting cable, cable bundle, or cable housing can therefore be safely guided through the underrail to the movable rail and coupled to the seat.

[0012] The receiving profile is, for example, designed as a dovetail profile. Alternatively, the receiving profile can be designed as a hollow body, in particular a hollow strip. The hollow body or hollow strip can have a frustoconical cross-section. Alternatively, the receiving profile is trough-shaped, for example in the form of a groove or channel. The receiving profile is, for example, a profile strip integrated into the rail. The receiving profile is, for example, essentially C-shaped, U-shaped, or J-shaped in cross-section. To save material and reduce manufacturing steps, the receiving profile is open on one side, in particular on a side facing an interior of the rail. The receiving profile is connected to the interior.

[0013] Alternatively, the recording profile can of course be a completely closed profile.

[0014] In another embodiment, the receiving profile extends section by section over the longitudinal extent of the rail or over its entire length. The receiving profile can be designed as a cable guide integrated into the rail, with ends open towards the rail's end faces, intended for the insertion of a cable, cable bundle, cable housing, or multiple cables. The receiving profile extends, for example, at least partially over the total height of the side wall.

[0015] In another embodiment, the connecting cable, cable bundle, or cable housing is held in the rail by means of the receiving profile by means of a force-fit connection. For example, the connecting cable, cable bundle, or cable housing is held in the rail by means of a clamping action using the receiving profile. The connecting cable, cable bundle, or cable housing can have a substantially round or flat cross-section. The shape of the receiving profile corresponds to a shape of the connecting cable, cable bundle, or cable housing.

[0016] In another embodiment, the connecting cable, cable bundle or cable housing is held in the rail in a form-fitting manner by means of the receiving profile.

[0017] For example, a hollow tube or hollow strip is formed onto an inner surface of the side wall. In another embodiment, the receiving profile is designed in the form of an integrated, formed or injection-molded guide groove.

[0018] Alternatively, the mounting profile can be designed as a separate profile element, which is held to an inner side wall by a material-fit, form-fit, and / or force-fit connection. An existing rail or a rail that has already been manufactured can be equipped with a separate profile element designed as a mounting profile. The profile element is, for example, a hollow tube, a hollow strip, a profile groove, or a profile channel.

[0019] For example, the separate mounting profile or cable guide and the inner side wall are designed such that they are positively and detachably connected to each other by means of a tongue-and-groove joint or a tenon joint, in particular a dovetail joint. For example, the separate mounting profile or cable guide can be inserted or slid into a guide groove in the inner side wall in the longitudinal direction. The separate mounting profile or cable guide has a plug-in profile or tenon profile, in particular in the form of a dovetail, that corresponds to the guide groove in the inner side wall.

[0020] In another embodiment, the receiving profile is integrated into the side wall in the form of a longitudinal guide groove and is formed integrally with it. For example, the receiving profile is essentially U-shaped or trough-shaped in cross-section.

[0021] The advantages achieved with the invention lie particularly in the fact that a cable receptacle and cable guide are integrated into the rail, for example a floor rail, in such a way that no additional retaining elements or fasteners are required to fix a connecting cable or cable assembly to the rail. Furthermore, the integrated receptacle profile in the rail prevents the connecting cable or cable assembly from rattling or twisting within the rail profile or the rail pair. In addition, it prevents the connecting cable or cable assembly from coming into unwanted friction with other components of the rail pair during longitudinal seat adjustment. The receptacle profile allows the connecting cable to run or be guided through the rail with minimal friction.

[0022] Another advantage is that the connecting cable is securely guided and held in the rail, thus reducing vibrations. This largely prevents the connecting cable or cable assembly from breaking.

[0023] The rail is a floor rail, also called a guide rail or bottom rail, in which the web forms a rail bottom or bottom wall, and the side walls project upwards from the web. The side walls extend oppositely, and in particular parallel to each other, along the longitudinal dimension of the rail. Alternatively, the rail is designed as a seat rail, also called a top rail or rail runner.

[0024] The mounting profile is located internally on at least one side wall. This means that the mounting profile is positioned in a receiving space formed between the side walls, for example, a cavity or interior space.

[0025] The mounting profile and the corresponding side wall are formed as a single piece. In particular, the rail is formed as a single piece. For example, the rail is a stamped and bent part.

[0026] In another embodiment, the rail is formed, for example, from an aluminum profile or sheet metal profile, in particular from an extruded aluminum profile.

[0027] In another embodiment, the side wall is shaped such that it forms at least the receiving profile and additionally a receiving space, also called an interior, for an internal rail, for example, a top rail. The receiving profile points towards the receiving space or the interior of the rail. For example, the dovetail-shaped or trough-shaped receiving profile is formed by an inner surface of the corresponding side wall. The receiving profile is, for example, designed as an inner wall profile of the side wall.

[0028] In another embodiment, the receiving profile is provided with a wear-resistant and / or low-friction coating and / or flocking.

[0029] In one embodiment of the invention, at least one rolling surface for an adjustment element is provided in the interior of the rail. The receiving profile is arranged, for example, laterally offset from the rolling surface when viewed in the transverse direction of the rail. The rolling surface extends section by section over a longitudinal portion of the rail or over the entire length of the rail.

[0030] In one embodiment according to the invention, at least one locking surface or clamping surface is arranged in the area of ​​the receiving profile, wherein the locking surface or clamping surface is designed to support the connecting cable, cable bundle, or cable housing in the transverse direction of the rail. The locking surface or clamping surface is integrally formed, molded, injection-molded, or separately attached to an inner surface of the side wall. The connecting cable, cable bundle, or cable housing is held, clamped, and in particular, clamped by means of the locking surface. The locking surface is, for example, formed integrally with the receiving profile and / or the side wall and / or the entire rail. The locking surface is, for example, designed as a locking lug or a locking hook and projects from the side wall, in particular from the inner surface of the side wall. Viewed in the transverse direction of the rail, the locking surface is arranged laterally offset from the receiving profile.The resting surface extends, for example, in sections over a longitudinal dimension of the rail or over the entire length of the rail.

[0031] The object is further solved according to the invention with a pair of rails for a seat longitudinal adjustment device for a seat, in particular a vehicle seat, wherein the pair of rails comprises at least two rails which are movable relative to each other, wherein at least one of the rails is essentially U-shaped and has at least two side walls and a web connecting the side walls, wherein at least one of the side walls has a receiving profile, in particular a dovetail-shaped receiving profile, for receiving and guiding a cable along the longitudinal extent of the rail.

[0032] Furthermore, the object of the invention is achieved by a seat longitudinal adjustment device for a seat, in particular a vehicle seat, wherein the seat longitudinal adjustment device comprises at least one pair of rails and an electrically operated adjustment unit, wherein the pair of rails comprises at least two rails which are movable relative to each other, wherein at least one of the rails is essentially U-shaped and has at least two side walls and a web connecting the side walls, wherein at least one of the side walls has a receiving profile, in particular a dovetail-shaped receiving profile, in which a connecting cable is arranged and connects the adjustment unit, for example its drive unit and / or adjustment elements, to a power source.

[0033] In another embodiment, the connecting cable has a shape corresponding to the shape of the receiving profile. For example, a cable profile is arranged and guided in the receiving profile in a form-fitting manner to a large extent.

[0034] In another embodiment, the cable profile has a dovetail shape. The cable profile is surrounded by an aluminum profile of the receiving profile. The cable profile is thus held within the receiving profile, which is designed as an aluminum profile.

[0035] In another embodiment, the cable profile is provided on its outer surface with a wear-resistant and / or low-friction coating and / or flocking. For example, the connecting cable is flocked to reduce friction between the receiving profile and the cable profile and to compensate for tolerances. This ensures, to a large extent, that the cable is guided without play or rattle.

[0036] In another embodiment, the pair of rails includes a cable winding device. The cable winding device is, for example, designed in the form of a storage cassette or cable cassette. The cable winding device is designed to wind or unwind the connecting cable in the lower rail when the upper rail is adjusted. The connecting cable is thus stowed and / or stored in a cassette outside the corresponding rail and / or the pair of rails.

[0037] In a further embodiment, the seat longitudinal adjustment device according to the invention comprises at least two pairs of rails arranged at a distance from one another, each pair of rails consisting of an upper rail and a lower rail, which are movable relative to each other. The upper rail is designed as a movable rail element. Depending on the design of the seat longitudinal adjustment device, the upper rail can alternatively be fixed and the lower rail the previously movable rail element. In this case, the upper rail or rail runner has a significantly shorter length than the lower rail or guide rail. For example, the lower rail, which is fixed, has a length of several meters, in particular 1.5 m to 2.5 m, for example 2 m. The upper rail or rail runner has a short length of less than 1 m.

[0038] In another embodiment, the seat longitudinal adjustment device for adjusting the seat longitudinally comprises, for example, roller elements and / or sliding rollers or sliding cylinders, which are mounted on the upper rail and roll along the lower rail. The roller elements are, for example, part of the adjustment unit. The roller elements are, for example, electrically driven, and in particular, movable.

[0039] Exemplary embodiments of the invention are explained in more detail with reference to the drawings. These show: Fig. 1. Schematic view in perspective of a seat, in particular a vehicle seat, with a seat longitudinal adjustment device comprising two pairs of rails, Fig. 2 schematically a sectional view through a pair of rails of the seat longitudinal adjustment device, Fig. 3 schematically in sectional view a rail of the rail pair, wherein the rail has a receiving profile for receiving and guiding a cable, cable bundle or cable housing, Fig. 4 schematically in sectional view another embodiment of a rail of the rail pair, wherein the rail has a receiving profile for receiving and guiding a cable, cable bundle or cable housing, and Fig. Figures 5A to 5C schematically show in sectional views another embodiment of a pair of rails, wherein one of the rails of the pair of rails has a receiving profile for receiving and guiding a cable, cable bundle or cable housing.

[0040] Corresponding parts are marked with the same reference symbols in all figures.

[0041] Fig. Figure 1 shows a schematic perspective view of a seat 1, in particular a vehicle seat, with a seat longitudinal adjustment device 2.

[0042] The seat 1 is arranged, for example, on a vehicle body (not shown in detail) by means of the seat longitudinal adjustment device 2.

[0043] One in the Fig. A schematically represented vehicle seat 1 is described below using three mutually perpendicular spatial directions. A longitudinal direction X, in a vehicle seat 1 installed in a vehicle, runs largely horizontally and preferably parallel to a longitudinal direction of the vehicle, which corresponds to the vehicle's usual direction of travel. A transverse direction Y, perpendicular to the longitudinal direction X, is also horizontally oriented in the vehicle and runs parallel to a transverse direction of the vehicle. A vertical direction Z runs perpendicular to the longitudinal direction X and perpendicular to the transverse direction Y. In a vehicle seat 1 installed in a vehicle, the vertical direction Z preferably runs parallel to a vertical axis of the vehicle.

[0044] The positional and directional terms used, such as front, rear, top, and bottom, refer to the viewing direction of an occupant seated in vehicle seat 1 in a normal seating position, with vehicle seat 1 installed in the vehicle in a suitable position for passenger transport, with the backrest upright and oriented in the direction of travel as usual. However, vehicle seat 1 can also be installed or moved in a different orientation, for example, facing the rear of the vehicle.

[0045] The seat longitudinal adjustment device 2 comprises, for example, two pairs of rails 3 arranged at a distance from each other. Each pair of rails 3 comprises two rails 31, 32, which are movable relative to each other. For example, each pair of rails 3 comprises a rail 31 designed as a seat rail and a rail 32 designed as a floor rail. Rail 32 is a lower rail, also called a guide rail. Rail 31 is, for example, an upper rail, also called a rail runner. For clarity in the following description, rail 31 will be referred to as the upper rail 31 and rail 32 as the lower rail 32.

[0046] The upper rail 31 is arranged longitudinally adjustable on the lower rail 32 between a front end position and a rear end position. This adjustability allows for longitudinal adjustment of the seat 1's position, with the front end position of the upper rail 31 corresponding to the frontmost position of the seat 1 and the rear end position of the upper rail 31 corresponding to the rearmost position of the seat 1.

[0047] The seat longitudinal adjustment device 2 includes, for example, a locking element (not shown in detail). Each pair of rails 3 can include a corresponding locking element.

[0048] The seat longitudinal adjustment device 2 comprises at least one adjustment unit 4 for longitudinal adjustment of the seat 1.

[0049] In a training course, seat 1 is equipped with, for example, a number of safety components 10. Safety components 10 include, for example, airbags, seat belt tensioners (e.g., pyrotechnically actuated seat belt tensioners), and / or seat belt warning devices.

[0050] Fig. Figure 2 schematically shows a cross-sectional view through a pair of rails 3 of the seat longitudinal adjustment device 2.

[0051] The seat longitudinal adjustment device 2 comprises at least one adjustment unit 4 for longitudinal adjustment of the seat 1. The adjustment unit 4 includes, for example, at least two roller elements 41, such as sliding rollers or sliding cylinders. Furthermore, the adjustment unit 4 includes, for example, a drive unit (not shown) that drives the adjustment elements 41, such as a motor. Alternatively, the adjustment unit 4 can be operated manually. The longitudinal adjustment of the seat 1 can, for example, be performed manually.

[0052] The upper rail 31 and the lower rail 32 are each U-shaped. The upper rail 31 is U-shaped and arranged inverted within the lower rail 32. In the assembled position of the upper rail 31 against the lower rail 32, they define a cavity 33 inside the seat longitudinal adjustment device 2.

[0053] The fixed lower rail 32 has a substantially U-shaped cross-section, comprising a web 321, hereinafter referred to as the bottom wall 321 or rail bottom, and two side walls 322. The side walls 322 extend upwards from the bottom wall 321 and are parallel to each other. The ends 323 of the side walls 322 are directed inwards, in particular curved, and each form an upper support wall. The ends 323 are arranged substantially parallel to the bottom wall 321. A space, for example a leg area, is formed between the ends 323 for the passage of a seat connection attached to the upper rail 31. The thus free ends 323 of the side walls 322 form internal rolling surfaces 324, for example contact surfaces, for the adjusting elements 41, which are arranged on the movable upper rail 31 and hold the upper rail 31 movably on the lower rail 32.The floor wall 321 can have lower internal, in particular inclined, rolling surfaces 325 on which further adjustment elements 41 can be rolled.

[0054] For example, the lower adjusting elements 41 are main support rollers or main support cylinders, sliding rollers or sliding cylinders. The upper adjusting elements 41 are, for example, secondary rollers, in particular secondary support rollers or secondary support cylinders, sliding rollers or sliding cylinders.

[0055] The upper rail 31 has a U-shaped cross-section and is arranged inverted within the lower rail 32. In the assembled state, the upper surface of the upper rail 31 is spaced apart from the ends 323 of the side walls 322 of the lower rail 32. To ensure this spacing, the upper adjustment elements 41, which contact and roll on the rolling surfaces 324, are held spring-loaded on the upper rail 31.

[0056] The upper rail 31 comprises two side walls 312 projecting downwards from an upper wall 311 (in relation to the inverted arrangement of the U-shaped upper rail 31). The upper wall 311 is, for example, designed as a web 311. The side walls 312 are each arranged in a space, for example a cavity or receiving space 326, between the ends 323 of the side walls 322 of the lower rail 32 and its bottom wall 321. By means of the lower adjustment elements 41, the upper rail 31, in particular its upper wall 311 and side walls 312, is spaced apart from the bottom wall 321 of the lower rail 32 and movably held therein. The lower rail 32 thus forms the receiving space 326 for the upper rail 31 and the adjustment unit 4 between its two side walls 322.

[0057] Longitudinal adjustment of the seat 1 relative to the vehicle floor is achieved by longitudinally displacing the upper rail 31 relative to the lower rail 32. The upper rail 31 and the lower rail 32 are only in contact with each other in specific guide areas via the adjustment elements 41. Due to at least one or more of these adjustment elements 41, for example in the form of roller elements, the upper rail 31 is spring-loaded relative to the lower rail 32 during normal operation when the seat is longitudinally adjusted in the Z-axis direction and is movable in the X-axis direction. In the remaining area, the lower rail 32 and the upper rail 31 are spring-loaded due to the mounting via the adjustment elements 41 and are thus arranged without play at a distance from each other.

[0058] To supply power to the adjustment unit 4 and / or the safety components 10 and / or the upper rail 31 and / or the seat 1, the seat longitudinal adjustment device 2 is connected to a vehicle-side power source (not shown), for example, an on-board electrical system, or to another power source, in particular a power supply unit. Power is supplied via a connecting cable 5, for example, a power cable.

[0059] For the secure guidance and retention of the connecting cable 5 in the rail pair 3, the lower rail 32 includes a receiving profile 6. The receiving profile 6 is formed by one of the side walls 322. In a further embodiment, each of the side walls 322 includes a receiving profile 6. The connecting cable 5 can be configured as a cable bundle with or without a cable housing.

[0060] The receiving profile 6 is designed as a dovetail profile. The receiving profile 6 extends section by section over the longitudinal extent of the lower rail 32 or over the entire length of the lower rail 32.

[0061] In other words, the corresponding side wall 322 includes a dovetail profile or is dovetail-shaped.

[0062] The receiving profile 6 is designed in the form of a recess or groove. The receiving profile 6 forms a cavity in which the connecting cable 5 is or can be arranged. The receiving profile 6 is formed by an inner surface of the side wall 322. Alternatively, the receiving profile 6 can be a separate part that is attached to the corresponding side wall 322.

[0063] The corresponding side wall 322 or the receiving profile 6 includes an inwardly projecting locking surface 61. The locking surface 61 forms, for example, a clamping surface. The locking surface 61 is designed, for example, as a locking lug or locking hook. The locking surface 61 projects obliquely downwards and inwards into the receiving space 326. The locking surface 61 is arranged, for example, in a bending area between the corresponding side wall 322 and the inwardly bent end 323 of the lower rail 32. The upper locking surface 61 is formed, for example, in a connection area between the rolling surface 324 and the receiving profile 6. A lower locking surface 62 is formed by the inclined rolling surface 325. For example, the locking surface 62 is formed in a connection area between the rolling surface 325 and the receiving profile 6. This limits the connecting cable 5 at the top and bottom.The connecting cable 5 is clamped or tensioned in the receiving profile 6 by means of the locking surface 62. The connecting cable 5 is positively engaged in the receiving profile 6, in particular held or tensioned there. The connecting cable 5 is frictionally engaged in the receiving profile 6, in particular held or tensioned there. Both side walls 322 can be formed with a receiving profile 6. For example, both side walls 322 are identical.

[0064] In the fully assembled state of the seat longitudinal adjustment device 2, the connecting cable 5 is arranged between the side wall 322 of the lower rail 32 and a side wall 312 of the upper rail 31. The connecting cable 5 is largely protected from external influences.

[0065] The connecting cable 5 has a shape corresponding to the shape of the receiving profile 6. For example, the connecting cable 5 is held and guided in the receiving profile 6 in a form-fitting manner to a large extent.

[0066] A cable profile 51 of the connecting cable 5 has a dovetail shape. The cable profile 51 is surrounded by an aluminum profile of the receiving profile 6. The cable profile 51 is thus received in the receiving profile 6, which is designed as an aluminum profile.

[0067] The cable profile 51, for example, is provided on its outer surface with a wear-resistant and / or low-friction coating 52 and / or flocking 53. For example, the connecting cable 5 is flocked to reduce friction between the receiving profile 6 and the cable profile 51 and to compensate for tolerances. This ensures, to a large extent, that the connecting cable 5 is guided without play or rattle.

[0068] Fig. Figure 3 schematically shows a cross-sectional view of a lower rail 32 of the rail pair 3, wherein the lower rail 32 comprises an integrated receiving profile 6 in which a connecting cable 5 is arranged or can be arranged. The receiving profile 6 extends over the entire height of an inner wall of the lower rail 32. The receiving profile 6 has an upper locking surface 61 and a lower locking surface 62, which are arranged laterally offset from the receiving profile 6, in particular in the direction of the receiving space 326. The connecting cable 5 can be clamped or tensioned in the receiving profile 6 by means of the locking surfaces 61, 62.

[0069] Fig. Figure 4 schematically shows another embodiment of a lower rail 32 of the rail pair 3, wherein the lower rail 32 comprises an integrated receiving profile 60 in which a connecting cable 5 is arranged or can be arranged.

[0070] The receiving profile 60 shown here is designed in the form of a guide groove or guide recess. For example, the receiving profile 60 has a cross-section that is essentially U-shaped or trough-shaped. The receiving profile 60 is arranged in a lower section of the side wall 322. The receiving profile 60 is open at the top.

[0071] The corresponding side wall 322 or the receiving profile 60 comprises at least one locking surface 63, which projects, for example, from the bottom wall 321 or in the area of ​​the rolling surface 325. The locking surface 63 forms, for example, a clamping surface. The locking surface 63 is designed, for example, as a locking lug or locking hook. The locking surface 63 extends essentially parallel to the side wall 322. The receiving profile 60 is designed, for example, as a guide channel or guide groove between the locking surface 63 and the side wall 322. This separates the connecting cable 5 from the receiving space 326 for receiving the upper rail 31 and provides lateral support when the cable is mounted or when it is held in the receiving profile 60. The receiving profile 60 extends over the entire height of an inner wall of the lower rail 32. The receiving profile 60 can accommodate connecting cables 5, cable bundles, or cable housings of various designs.In the illustrated embodiment, the connecting cable 5, viewed in the vertical direction of the lower rail 32, is arranged and held in the lower section of the receiving profile 60. The receiving profile 60 has at least the lower locking surface 62, which is arranged laterally offset from the receiving profile 60, in particular in the direction of the receiving space 326. The locking surface 63 is arranged between the receiving profile 60 and the rolling surface 325.

[0072] Fig. Figures 5A to 5C schematically show in sectional views another embodiment of a rail pair 3, wherein the lower rail 32 of the rail pair 3 has a receiving profile 600 for receiving and guiding a connecting cable 5, cable bundle or cable housing. Fig. 5A a rail pair 3 in mounted and operational condition, Fig. 5B only the lower rail 32 with an inserted connecting cable 5 and Fig. 5C the bottom rail 32 without connecting cable 5.

[0073] The upper rail 31 and the lower rail 32 are each U-shaped. The upper rail 31 is U-shaped and arranged inverted within the lower rail 32. In the assembled position of the upper rail 31 against the lower rail 32, they define a cavity 33 inside the seat longitudinal adjustment device 2. In the illustrated embodiment, the upper rail 31 includes a cover 7 that protects the cavity 33 from external influences.

[0074] The fixed lower rail 32 comprises a bottom wall 321 and two side walls 322. The side walls 322 extend upwards from the bottom wall 321 and are parallel to each other. The ends 323 of the side walls 322 are directed inwards, in particular curved, and each form an upper support wall. The ends 323 are arranged substantially parallel to the bottom wall 321. The free ends 323 of the side walls 322 form internal rolling surfaces 324, for example, contact surfaces, for the adjusting elements 41, which are arranged on the movable upper rail 31 and hold the upper rail 31 movably on the lower rail 32. The bottom wall 321 can have lower internal, in particular inclined, rolling surfaces 325 on which further adjusting elements 41 can roll.

[0075] For example, the lower adjusting elements 41 are main support rollers or main support cylinders, sliding rollers or sliding cylinders. The upper adjusting elements 41 are, for example, secondary rollers, in particular secondary support rollers or secondary support cylinders, sliding rollers or sliding cylinders.

[0076] The upper rail 31 comprises two side walls 312 projecting downwards from an upper wall 311 (in relation to the inverted arrangement of the U-shaped upper rail 31). The side walls 312 are each arranged in a space, for example a cavity or receiving space 326, between the ends 323 of the side walls 322 of the lower rail 32 and its bottom wall 321. By means of the lower adjustment elements 41, the upper rail 31, in particular its upper wall 311 and side walls 312, is spaced apart from the bottom wall 321 of the lower rail 32 and movably held against it. The lower rail 32 thus forms the receiving space 326 for the upper rail 31 and the adjustment unit 4 between its two side walls 322.

[0077] Longitudinal adjustment of the seat 1 relative to the vehicle floor is achieved by longitudinal displacement of the upper rail 31 relative to the lower rail 32. By means of at least one or more of these adjustment elements 41, for example in the form of roller elements, the upper rail 31 is spring-loaded relative to the lower rail 32 during normal operation when the seat is longitudinally adjusted in the Z-axis direction and is movable in the X-axis direction. In the remaining range, the lower rail 32 and the upper rail 31 are spring-loaded due to the mounting via the adjustment elements 41 and are thus arranged without play at a distance from each other.

[0078] To supply power to the adjustment unit 4, it is connected to a vehicle-side power source (not shown in detail), for example, the vehicle's electrical system. Power is supplied via at least one connecting cable 5, for example, a power cable.

[0079] For the secure guidance and retention of the connecting cable 5 in the rail pair 3, the lower rail 32 includes a receiving profile 600. The receiving profile 600 is formed by one of the side walls 322. In a further embodiment, each of the side walls 322 includes a receiving profile 600. The connecting cable 5 can be configured as a cable bundle with or without a cable housing.

[0080] The receiving profile 600 is C-shaped. The receiving profile 600 extends section by section over the longitudinal extent of the lower rail 32 or over the entire length of the lower rail 32. The receiving profile 600 is formed as a guide groove formed by the side wall 322. The receiving profile 600 is formed, for example, by a concave recess formed in the side wall 322. The receiving profile 600 is suitable, for example, for receiving and guiding round cables, round cable bundles, or round cable housings. The receiving profile 600 is formed in the form of a recess or groove. The receiving profile 600 forms a cavity in which the connecting cable 5 is or can be arranged. The receiving profile 600 is formed by an inner surface of the side wall 322. Alternatively, the receiving profile 600 can be a separate part that is attached to the corresponding side wall 322.In the illustrated embodiment, the receiving profile 600 is arranged in a lower section of the side wall 322 when viewed in the vertical direction of the lower rail 32.

[0081] A lower locking surface 62 is formed by the inclined rolling surface 325. For example, the locking surface 62 is formed in a connection area between the rolling surface 325 and the receiving profile 600. This limits the connecting cable 5 downwards and laterally. The connecting cable 5 is positively locked in the receiving profile 600 by means of the locking surface 62. In a further embodiment, the connecting cable 5 can be clamped or clamped by means of the locking surface 62. Both side walls 322 can be formed with a receiving profile 600. For example, both side walls 322 are identical.

[0082] In the fully assembled state of the seat longitudinal adjustment device 2, the connecting cable 5 is arranged between the side wall 322 of the lower rail 32 and a side wall 312 of the upper rail 31. The connecting cable 5 is largely protected from external influences.

[0083] The connecting cable 5 has a shape corresponding to the shape of the receiving profile 600. For example, the connecting cable 5 is held and guided in the receiving profile 600 in a form-fitting manner to a large extent. The receiving profile 600 can be provided with a wear-resistant and / or low-friction coating 8 and / or flocking 9. Reference symbol list 1 seat 2 Seat longitudinal adjustment device 3 pairs of rails 31 Rail, for example top rail 311 Bridge, especially upper wall 312 Side wall 32 rails, for example bottom rails 321 Bridge, especially bottom wall 322 Side wall 323 End 324, 325 Rolling surface 326 Recording Room 33 Cavity 4 Adjustment unit 41 Adjustment element 5 connecting cables 51 Cable profile 52 coating 53 flocking 6, 60, 600 Recording profile 61, 62, 63 Rest area 7 Cover 8 coating 9 flocking 10 Security Components X Longitudinal direction Y transverse direction Z Vertical direction

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