DE102021214144A1 - seat adjustment device - Google Patents

Abstract

The invention relates to a pretensioning element (7) for a pair of rails (3) of a longitudinal seat adjustment device (2), comprising at least one rolling element (6, 61), a bearing area (72) on which the rolling element (6, 61) is rotatably mounted, and a spring area (73) which is provided to resiliently support the bearing area (72) and the rolling element (6, 61) on a rail (31, 32) of the pair of rails (3), the bearing area (72) and the spring area (73 ) are formed in one piece. The invention also relates to a longitudinal seat adjustment device (2) with such a pretensioning element (7).

Description

The invention relates to a pretensioning element for a pair of rails of a longitudinal seat adjustment device. Furthermore, the invention relates to a longitudinal seat adjustment device for a seat, in particular a vehicle seat, with at least one pair of rails and a pretensioning element.

A longitudinal seat adjustment device generally comprises two pairs of rails which are arranged at a distance from one another and are each made up of two rails, an upper rail which is allocated to the seat and a lower rail which is allocated to the floor of a vehicle. The longitudinal seat adjustment device also includes at least one spring-loaded, movable, plate-shaped locking part, which is held on the upper rail and, in a locking position, blocks a movement of the upper rail in the lower rail. The lower rail can have openings, while the upper rail is provided with openings and the locking part has projections on its two opposite longitudinal sides, which can be moved into the openings and openings by a spring in the locking position. Such a longitudinal seat adjustment device is known, for example, from the European patent EP 1 227 950 B1 known.

Pairs of rails with an upper rail and a lower rail are known from the prior art, with rollers being arranged between them in order to roll the upper rail onto the lower rail or vice versa. The rollers are conventionally rotatably mounted on bearing bolts on the top rail or bottom rail.

The object of the present invention is to specify a new type of prestressing element that is simple and space-saving in design and has few parts, and to specify an improved longitudinal seat adjustment device compared to the prior art, which is simple in structure and has few parts.

With regard to the prestressing element, the object is achieved according to the invention by the features of claim 1 . With regard to the longitudinal seat adjustment device, the object is achieved according to the invention by the features of claim 8 .

The pretensioning element according to the invention comprises at least one rolling element, at least one bearing area on which the at least one rolling element is rotatably mounted, and at least one spring area which is provided to resiliently support the bearing area and the rolling element on one rail of the pair of rails, the bearing area and the spring area are formed in one piece.

In other words, the bearing area and the spring area are made in one piece. For example, the bearing area and the spring area are made of one, in particular the same, spring material. For example, the bearing area and the spring area are formed from one, in particular the same, sheet metal part, for example bent or stamped. The spring area is formed into a spiral spring or leaf spring.

The advantages achieved with the invention consist in particular in the fact that such a one-piece prestressing element enables simple clearance between the lower rail, for example a guide rail, and the upper rail, for example a rail runner. In particular, the movable upper rail, also called the rail runner, is moved in the lower rail, also called the guide rail, under spring pretension.

By means of the prestressing element according to the invention, fewer parts that have to be installed separately are required. The prestressing element combines a mounting and holding of the at least one rolling element on the upper rail and/or lower rail and spring prestressing to eliminate play between the rolling element and the rail on which the rolling element rolls. In doing so, freedom from play is ensured by using as few parts as possible.

The prestressing element according to the invention is designed to be easy to manufacture and install. Furthermore, the pretensioning element according to the invention is designed to save space.

The pretensioning element, in particular its bearing area and spring area, is/are formed from a sheet metal part or spring material, for example spring steel, for example stamped, pressed and/or bent.

For this purpose, in a simple embodiment, the pretensioning element is designed as a multifunctional component, which is designed at the same time as a carrier plate, spring and bearing for rolling elements. For this purpose, for example, the prestressing element is formed from a carrier plate, which is or is shaped accordingly, in particular bent, so that interfaces for bearing bolts and roller attachment and a flat area are formed as a leaf spring.

By means of the trained leaf spring, which is supported within the top rail, the appropriate preload is generated to eliminate play position between the rails of the respective pair of rails. In other words, the invention enables a movable top rail or rail runner with spring-loaded rollers to the bottom rail or guide rail to avoid unwanted free play in the bottom rail or in the guide rail.

For example, several, for example two, rolling elements are rotatably mounted on the pretensioning element. For this purpose, the prestressing element has a plurality of bearing areas, in particular two bearing areas. The storage areas are arranged parallel and spaced apart from one another. The prestressing is transmitted to the rolling elements on the prestressing element via the prestressed spring, in particular the leaf spring, and the bearing areas, for example by means of bearing bolts.

For example, the pretensioning element is a combined clamping element and tensioning element.

In a further embodiment, the pretensioning element comprises a carrier area which is formed in one piece with the bearing area and the spring area and which is arranged between the bearing area and the spring area and connects them to one another. Storage area, carrier area and spring area are formed from a sheet metal part or spring material, for example spring steel, for example stamped, pressed and/or bent.

In a further embodiment, the spring area is arranged at a longitudinal end of the carrier area and protrudes from it at a predetermined angle.

In a further embodiment, the bearing area is arranged on a lateral side of the carrier area and protrudes essentially perpendicularly from it.

In a further embodiment, the bearing area and the spring area are arranged on the carrier area in such a way that they protrude in the same direction from a plane defined by the carrier area. Accordingly, the carrier area forms the mount both for the spring area and for the bearing area. The carrier area is designed as a connection area, for example. The bearing area forms a bearing for the at least one rolling element. The spring area is intended to prestress the bearing area in the direction away from the carrier area in the assembled state, in particular in the direction of the bottom rail on which the rolling element rolls.

In a further embodiment, the spring area is designed as a clip spring, punch spring or leaf spring. For example, the spring area is designed as a bending spring.

In a further embodiment, the rolling element is attached to the bearing area by means of a bearing bolt.

In a further embodiment, the storage area comprises at least one holding element for receiving a fastening element arranged on one of the rails. In the mounted state, the retaining element is in snap-in engagement with the fastening element. This ensures that the pretensioning element is positioned and held in and/or on one of the rails. The holding element is hook-shaped, for example.

The object is also achieved according to the invention with a longitudinal seat adjustment device for a seat, in particular a vehicle seat, which comprises at least one pair of rails with an upper rail and a lower rail, which can be moved relative to one another, and a pretensioning element. The pretensioning element comprises at least one rolling element, at least one bearing area on which the at least one rolling element is rotatably mounted, and at least one spring area which is provided to resiliently support the bearing area and the rolling element on one of the rails of the pair of rails, the bearing area and the spring area are formed in one piece. In the assembled state, the pretensioning element is arranged between the upper rail and the lower rail in such a way that the upper rail and the lower rail are pretensioned relative to one another and are movably arranged.

The object is also achieved according to the invention with a longitudinal seat adjustment device which comprises at least two pairs of rails arranged at a distance from one another and at least one locking element, the pairs of rails each being formed from an upper rail and a lower rail which can be moved relative to one another, and the at least one locking element being spring-loaded and is movably supported on the upper rail and in a locking position blocks movement of the upper rail in the lower rail, and wherein the upper rail and the lower rail are biased towards one another by means of a biasing element arranged between them and are movably arranged.

In a further embodiment, the upper rail comprises at least one recess on its upper side, from which the at least one rolling element protrudes at least in sections in order to roll on the lower rail. The pretensioning element is held on and/or in the upper rail. By biasing and mounting the rolling element on and / or in the head rail in the direction of Bottom rail, on which the rolling element rolls, a wear-independent freedom from play in a direction of movement between bottom rail and top rail is ensured.

In a further embodiment, the pretensioning element is arranged on the upper rail in such a way that the spring area is supported with its end section protruding from the carrier area on the upper side of the upper rail and resiliently pretensions the bearing area and the rolling element rotatably mounted on it in the direction of the upper side.

In a further embodiment, the prestressing element is arranged on and/or in the upper rail in such a way that the rotatably mounted rolling element is resiliently prestressed in the direction of a contact surface or rolling surface of the lower rail. For example, the rolling element is arranged in the upper rail in such a way that it contacts a rolling surface of the lower rail through recesses in the upper rail. The spring area can be supported with its end section protruding from the support area on the upper rail and resiliently prestress the rolling element against the contact surface or rolling surface. In this embodiment further rolling elements can be provided, which are passed through the upper side of the upper rail. The upper rolling elements are rotatably mounted in a fixed position with the upper rail.

The advantages achieved with the invention consist in particular in the fact that such an inner and in particular one-piece prestressing element enables simple clearance between the lower rail, for example a guide rail, and the upper rail, for example a rail runner. In particular, the movable upper rail, also called the rail runner, is moved in the lower rail, also called the guide rail, under spring pretension.

By means of the formed leaf spring, which is supported between the upper rail and the lower rail, the appropriate pretension is generated in order to achieve clearance between the rails of the respective pair of rails. In other words, the invention enables a movable top rail or rail runner with spring-loaded rollers to the bottom rail or guide rail to avoid unwanted free play in the bottom rail or in the guide rail.

• 1 schematisch in perspektivischer Darstellung einen Sitz, insbesondere einen Fahrzeugsitz, mit einer Sitzlängsverstelleinrichtung umfassend zwei Schienenpaare,
• 2 schematisch eine Schnittdarstellung durch ein Schienenpaar im Bereich eines Verriegelungselements,
• 3 schematisch eine Schnittdarstellung durch ein weiteres alternatives Schienenpaar im Bereich eines Verriegelungselements,
• 4 schematisch eine perspektivische Darstellung einer Oberseite einer Oberschiene,
• 5 schematisch eine perspektivische Darstellung einer Unterseite der Oberschiene,
• 6 schematisch eine perspektivische Darstellung einer Oberseite eines Vorspannelements, und
• 7 schematisch eine perspektivische Darstellung einer Unterseite des Vorspannelements.

Embodiments of the invention are explained in more detail with reference to drawings. show:

• 1 a schematic perspective view of a seat, in particular a vehicle seat, with a longitudinal seat adjustment device comprising two pairs of rails,
• 2 a schematic sectional view through a pair of rails in the area of a locking element,
• 3 a schematic sectional view through another alternative pair of rails in the area of a locking element,
• 4 schematically a perspective representation of an upper side of a top rail,
• 5 a schematic perspective view of an underside of the upper rail,
• 6 schematically a perspective representation of an upper side of a pretensioning element, and
• 7 schematically shows a perspective view of an underside of the prestressing element.

Corresponding parts are provided with the same reference symbols in all figures.

1 shows a schematic perspective view of a seat 1, in particular a vehicle seat, with a longitudinal seat adjustment device 2. The seat 1 is arranged by means of the longitudinal seat adjustment device 2, for example on a vehicle body, not shown in detail.

An Indian 1 Schematically illustrated vehicle seat 1 is described below using three mutually perpendicular spatial directions. In the case of a vehicle seat 1 installed in the vehicle, a longitudinal direction X runs largely horizontally and preferably parallel to a longitudinal direction of the vehicle, which corresponds to the usual direction of travel of the vehicle. A transverse direction Y running perpendicular to the longitudinal direction X is also aligned horizontally in the vehicle and runs parallel to a vehicle transverse direction. A vertical direction Z runs perpendicularly to the longitudinal direction X and perpendicularly to the transverse direction Y. In the case of a vehicle seat 1 installed in the vehicle, the vertical direction Z preferably runs parallel to a vertical axis of the vehicle.

The position information and directional information used, such as front, rear, up and down, refer to a viewing direction of an occupant seated in the vehicle seat 1 in a normal seating position, with the vehicle seat 1 installed in the vehicle, in a usage position suitable for passenger transport with the backrest upright and how is usually aligned in the direction of travel. However, the vehicle seat 1 can can also be installed or moved in a different orientation, for example against the direction of travel.

The longitudinal seat adjustment device 2 comprises, for example, two pairs of rails 3 which are arranged at a distance from one another. The respective pair of rails 3 includes an upper rail 31, also called rail runner or seat rail, and a lower rail 32, also called guide rail or bottom rail. The upper rail 31 is arranged on the lower rail 32 so that it can be longitudinally adjusted between a front end position and a rear end position. This adjustability allows a longitudinal adjustment of the position of the seat 1, the front end position of the upper rail 31 being assigned the foremost position of the seat 1 and the rear end position of the upper rail 31 being assigned the rearmost position of the seat 1.

The longitudinal seat adjustment device 2 also includes at least one locking element 4. Each pair of rails 3 can include an associated locking element 4, as is described below with reference to FIG 2 until 5 is described in more detail.

2 shows a schematic sectional view through one of the pairs of rails 3 in the area of the associated locking element 4.

3 shows a schematic sectional view through another alternative pair of rails 3 in the area of the associated locking element 4. The two pairs of rails 3 are constructed essentially the same.

The embodiments according to 2 and 3 differ in the type of actuating element 9 for the locking element 4.

In 2 and 3 the actuating element 9 is shown in the non-actuated position. According to 2 the actuating element 9 protrudes into a through opening 36 of the upper rail 31 in the non-actuated position. According to 3 the actuating element 9 protrudes through the through-opening 36 in the non-actuated position.

The locking element 4 is in the 2 and 3 each shown in a locked position S1.

The at least one locking element 4 is spring-loaded and movably supported, in particular rotatably, supported on the upper rail 31 . There is an in 4 shown return element 11 is provided, in particular a return spring. The reset element 11 is held at one end on the upper rail 31 and at the other end on the locking element 4 . The locking element 4 locks in the locking position S1, as in 2 shown, a movement of the upper rail 31 in the lower rail 32. When unlocking the return element 11 is tensioned. When the unlocking force ceases, the restoring element 11 relaxes, so that the locking element 4 is automatically returned to the locking position S1 by means of the restoring element 11 . The restoring element 11 is designed in such a way that it presses the locking element 4 into the locking position S1. In other words: the locking element 4 is spring-loaded into the locking position S1, in particular pressed, so that the upper rail 31 and the lower rail 32 are arranged without play in relation to one another.

The lower rail 32 is provided with a number of openings 33 and the upper rail 31 with a number of openings 34 in order to block the movement of the upper rail 31 in relation to the lower rail 32 in order to prevent the seat from being displaced. Projections 41, in particular tooth-shaped projections 41, of the locking element 4 engage in these openings 33, in particular slit-shaped passage openings, and openings 34, in particular slit-shaped or comb-like openings, in the locking position S1, so that a movement between the upper rail 31 and lower rail 32 is blocked.

The upper rail 31 is formed from a U-shaped sheet metal profile. The bottom rail 32 is formed from a pressed aluminum profile, for example. For example, the upper rail 31 can be formed as a bent steel profile with welded steel formed parts, for example the welded blocking element 98 . The profiles can be designed in such a way that the ends 35 of the upper rail 31 and the lower rail 32 which are free in cross-section engage in one another, as a result of which the upper rail 31 is largely fixed in the Z-axis direction.

In the mounted position of the upper rail 31 on the lower rail 32 , these delimit a cavity 5 inside the longitudinal seat adjustment device 2 .

The fixed bottom rail 32 has a substantially U-shaped cross section with a bottom wall 321 and side walls 322 erected from the bottom wall 321 upward. Ends 323 of the side walls 322 are directed inwards, in particular bent, and each form an upper support wall. The ends 323 are arranged substantially parallel to the bottom wall 321 . Between the ends 323 is a space, such as a later-described leg portion 37 formed to carry out at the Top rail 31 fixed seat connection. The free ends 323 of the side walls 322 form internal rolling surfaces 324 for first, in particular upper, rolling elements 61 described later, which are arranged on the movable upper rail 31 and hold the upper rail 31 on the lower rail 32 in a movable manner. The bottom wall 321 can have lower inner rolling surfaces 325 on which further second, in particular lower, rolling elements 62 can be rolled.

The upper rail 31 is formed in a U-shape and is arranged in the lower rail 32 upside down. An upper side 38 of the upper rail 31 is arranged at a distance from the ends 323 of the side walls 322 of the lower rail 32 in the assembled state. In order to ensure this distance, the first rolling elements 61, which contact the rolling surfaces 324 and roll on them, are held on the upper rail 31 in a spring-biased manner.

The head rail 31 includes two side walls 312 depending downwardly from a top wall 311 (with respect to the inverted arrangement of the U-shaped head rail 31). The side walls 312 are each arranged in a space between the ends 323 of the side walls 322 of the bottom rail 32 and the bottom wall 321 thereof. The upper rail 31, in particular its upper wall 311, is held at a distance from the bottom wall 321 of the lower rail 32 and movably by the lower second rolling elements 62.

The lower second rolling elements 62 are, for example, main support rollers or main support rollers. The upper first rolling elements 61 are, for example, secondary rollers, in particular secondary support rollers.

A longitudinal adjustment of the seat 1 relative to the vehicle floor takes place via a longitudinal displacement of the upper rail 31 relative to the lower rail 32. The upper rail 31 and the lower rail 32 are only in certain guide areas on the rolling elements 6, in particular the first and second rolling elements 61, 62, with each other Contact. During normal operation, at least one or more of these upper first rolling elements 61 fix the upper rail 31 in a spring-biased manner relative to the lower rail 32 when the seat is adjusted longitudinally 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 bearing via the lower second rolling elements 62 and are therefore arranged at a distance from one another without play.

A prestressing element 7 , which is arranged within the upper rail 31 , is provided for spring prestressing of the upper rail 31 in relation to the lower rail 32 via the at least one upper first rolling element 61 . In particular, the pretensioning element 7 is arranged in the cavity 5 .

The pretensioning element 7 enables a simple release of play between the lower rail 32 and the upper rail 31 even during a longitudinal adjustment of the seat 1. The movable upper rail 31 is moved in the lower rail 32 under spring pretension.

For this purpose, the prestressing element 7 is designed as a multifunctional component, which is simultaneously designed as a support, spring and bearing for at least one or more of the rolling elements 6 , in particular the first rolling elements 61 . The prestressing element 7 is in particular a profile element, a shaped sheet metal part or a stamped sheet metal part. The biasing element 7 is in the 6 and 7 shown in detail.

For example, the pretensioning element 7 comprises a carrier area 71 which is formed from a carrier plate. The support area 71 is shaped, in particular curved, in such a way that a bearing area 72 and a spring area 73 are formed. The spring area 73 is designed as a leaf spring. The bearing area 72 is designed to receive a bearing pin 60 for a first rolling element 61 or two first rolling elements 61 (as illustrated).

The pretensioning element 7 thus comprises a carrier area 71, two bearing areas 72 for receiving or holding and mounting the rolling elements 6 and a spring area 73 for resiliently supporting and prestressing the pretensioning element 7, in particular its bearing areas 72. The carrier area 71 is between the bearing areas 72 and the spring area 73 arranged and connects these areas together. The carrier area 71 is formed in one piece with the bearing areas 72 and the spring area 73 . Support area 71, bearing areas 72 and spring area 73 are formed from one piece, in particular the same piece.

The carrier area 71 has, for example, two longitudinal ends 711 and two lateral sides 712 connecting them. The bearing areas 72 are each arranged on one of the lateral sides 712 of the carrier area 71 . The bearing areas 72 protrude essentially perpendicularly from the carrier area 71 . In cross section, the support area 71 and the bearing areas 72 form a U-shape. The spring area 73 is arranged at one of the longitudinal ends 711 of the carrier area 71 . The spring portion 73 protrudes from the support portion 71 at a predetermined angle. The angle is, for example, 20° to 45°. In particular, the spring area 73 extends in the direction of longitudinal extension of the prestressing element 7. The spring area 73 can be, for example, as a sheet be spring with an internal hole, for example in the form of a slot. The spring area 73 can be bent several times.

The spring area 73 has a free end section 731 . In the installed state, the pretensioning element 7 is arranged on the upper rail 31 in such a way that the spring area 73 is supported with its end section 731 protruding from the carrier area 71 on an underside 39 of the upper wall 311 of the upper rail 31 and the bearing areas 72 and the rotatably mounted rolling elements 61 in Direction of the rolling surfaces 324 presses, in particular resiliently biased.

By means of the prestressing element 7, which is supported via the first rolling elements 61 on the lower rail 32 and via the spring area 73 on the upper rail 31, the corresponding pretension is generated in order to achieve clearance clearance between the rails 31, 32 of the respective pair of rails 3. In other words: the invention enables a movable upper rail 31 with at least one or more spring-biased first rolling element(s) 61 towards the lower rail 32 in order to avoid free play in the lower rail 32 or in the guide rail.

The bearing areas 72 and the spring area 73 are arranged on the carrier area 71 in such a way that they protrude from a plane defined by the carrier area 71 in the same direction. In the mounted state, the bearing areas 72 and the spring area 73 project upwards from the carrier area 71 .

For example, the first rolling elements 61 are rotatably mounted on the pretensioning element 7 and are arranged on the lower rail 32, in particular the guide rail, in a spring-pretensioned manner. The spring area 73 of the pretensioning element 7 supported on the upper rail 31 (rail runner) transmits the pretension to the bearing area 72 and via this to the first rolling element(s) 61, which is/are resiliently pretensioned on the lower rail 32 in the locking position S1 are arranged / is and / or roll in the unlocked or release position resiliently biased / rolls.

In addition, the longitudinal seat adjustment device 2 for the longitudinal adjustment of the seat 1 comprises sliding rollers or sliding cylinders as at least one second rolling element 62 .

Depending on the arrangement of the pretensioning element 7 , the first rolling elements 61 (as shown) or the second rolling elements 62 (not shown) can be arranged on the upper rail 31 in a resiliently pretensioned manner and roll resiliently on the lower rail 32 . Thus, either the upper rolling elements 61 are fixed and the lower rolling elements 62 are cushioned by means of the pretensioning element 7 or vice versa.

For fastening the lower rail 32 to the vehicle body, for example a vehicle floor, a fastening bolt 8 is provided, which is passed through a through hole of a floor portion of the lower rail 32 to be fixed to the vehicle body.

For longitudinal adjustment of the seat 1, the longitudinal seat adjustment device 2 also includes an actuating element 9.

The upper rail 31 has a through opening 36 through which the actuating element 9 can be actuated.

In the exemplary embodiment, the actuating element 9 is designed as an actuating lever, in particular a rotary lever, which is rotatably mounted on the upper rail 31 . The actuating element 9 comprises at least one actuating area 91 and a coupling area 92. The actuating area 91 is designed as an actuating arm or actuating projection.

In the embodiment after 2 the actuation area 91 protrudes in the locking position S1 through the through opening 36 and beyond the upper rail 31 and into the open leg area 37 of the U-shaped lower rail 32, so that the actuation area 91 can be actuated to unlock the locking element 4.

In the alternate embodiment 3 the actuating area 91 of the actuating element 9 protrudes into the through-opening 36 and can be actuated from above through the open leg area 37 of the U-shaped lower rail 32 to unlock the locking element 4 .

The coupling area 92 is designed to correspond to the contact area of the locking element 4 . The coupling area 92 comprises at least one hook-shaped projection 93 and a control cam 94.

For example, the locking element 4 comprises an engagement opening 42 in which the hook-shaped projection 93 of the coupling area 92 engages. The control cam 94 bears against an upper side of the locking element 4, which is in particular plate-shaped.

To unlock the locking element 4, the actuating element 9 is actuated, wherein the Actuating area 91 is actuated in the direction of through-opening 36 and into it, in particular in accordance with arrow P1, in order to be pivoted about an actuating axis BA in accordance with arrow P2, so that control cam 94, which is in engagement with locking element 4, initially pushes the plate-shaped locking element 4 tilts down or rotates according to arrow P31. In doing so and by further actuation of the actuation area 91 into the cavity 5, the hook-shaped projection 93 moves into the engagement opening 42 until the hook-shaped projection 93 encompasses the locking element 4 and, with further actuation, its projections 41 completely out of the openings 33 of the lower rail 32 according to the arrow P32 pulls out. As a result, the locking element 4 with its in particular tooth-like projections 41 disengages from the comb-shaped or slot-shaped openings 33 of the lower rail 32, so that a release position (not shown) is made possible and the upper rail 31 can be moved, in particular longitudinally adjusted, relative to the lower rail 32.

4 shows a schematic perspective representation of an upper side 38 of the upper rail 31.

The actuation area 91 of the actuation element 9 protrudes into the passage opening 36 . The tooth-shaped projections 41 of the locking element 4 are in the locking position S1 and protrude through the openings 33 in the upper rail 31 .

Fastening elements 10 can be provided on the upper rail 31 at the front. The fastening elements 10 can be designed differently depending on the type of seat attachment. In the embodiment shown after 4 the fastening elements 10 are designed as claw fasteners, each of which comprises a receiving opening 101 into which claws of the seat 1, not shown in detail, engage in a holding manner. Alternatively, the fastening element 10 can be designed to fasten the seat 1 to the upper rail 31 by means of a screw connection or a welded connection. The respective fastening element 10 is fastened to the upper rail 31 in a force-fitting, form-fitting and/or cohesive manner. For example, the respective fastening element 10 is fastened to the upper rail 31 by means of a welded connection 102 .

For spring-loaded roller guidance, the top rail 31 has recesses 381 on its upper side 38 (shown in Fig 4 ), from which at least the first rolling elements 61 protrude in order to be attached to the lower rail 32, as in FIG 2 and 3 shown to roll. The first rolling elements 61 are resiliently prestressed and movably arranged on the lower rail 32 by means of the prestressing element 7 and roll resiliently on the contact surface 324 of the lower rail 32 .

In addition, the top rail 31 can include further recesses 382 on its upper side 38, into which the second rolling elements 62 at least protrude and run “freely”.

In addition, the upper rail 31 has at least one further recess 383 in the area of the locking element 4, in which one end of a restoring element 11 is held.

Further recesses 384 serve to accommodate a rotary bearing 95 for the actuating element 9.

5 shows a schematic perspective view of an underside 39 of the upper rail 31.

The restoring element 11, in particular a spring, such as a wire spring or clip spring, is held in a receptacle 43 on the locking element 4 at the other end.

As shown in this view, the locking element 4 can include two engagement openings 42 . Corresponding to this, the actuating element 9 then has two hook-shaped projections 93 which are in engagement with these engagement openings 42 .

In this case, the longitudinal seat adjustment device 2 comprises two second rolling elements 62 which are each arranged at one end of the upper rail 31 . The second rolling elements 62, in particular the sliding elements for the longitudinal adjustment of the seat 1, are designed, for example, as rolling cylinders or spools. The second rolling elements 62 have a fixed axle which is fixed to the head rail 31 and on which the second rolling elements 62 rotate.

In addition, the longitudinal seat adjustment device 2 comprises two prestressing elements 7 which are each arranged between one of the second rolling elements 62 and the central locking element 4 .

The support area 71 of the respective prestressing element 7 is flat and flat.

The respective spring area 73 is designed as a clip spring or punch spring.

At the respective biasing element 7 are each a pair of first rolling elements 61 dre stored. These include the respective biasing element 7 in the associated bearing area 72, the bearing pin 60, which in the 6 and 7 are shown.

The pivot bearing 95 of the actuating element 9 comprises a stationary axle 96. The pivot bearing 95 is attached to the upper rail 31 on the inside, in particular welded by means of a weld seam 97.

The pivot bearing 95 is designed, for example, as a rod-shaped molded part for supporting and storing the pivotable actuating element 9 .

The pivot bearing 95 can simultaneously form a stop element or blocking element 98 , in particular a horizontal stop or transverse stop, for the locking element 4 . Alternatively, the pivot bearing 95 and the blocking element 98 can be designed as separate components. The blocking element 98 is fastened on the inside to the upper rail 31 , in particular connected to the upper rail 31 by means of the welded seam 97 in a materially bonded manner.

Undesirable movements of the locking element 4 out of the locking position S1 are limited or blocked by means of the blocking element 98 .

Blocking element 98 can be used to at least limit or completely block a horizontal movement or transverse movement of locking element 4, for example due to mechanical stresses on locking element 4, in particular in the event of excitations or vibrations in the horizontal or transverse direction Y (Y-axis direction), for example due to an accident. The blocking element 98 is arranged and designed in such a way that the locking element 4 remains in the locking position S1 despite possible undesired horizontal movements or transverse movements. Thus, the longitudinal seat adjustment device 2 is blocked and the seat 1 is fixed in its adjusted longitudinal position.

The pivot bearing 95 and the blocking element 98 can be designed as one component or as separate components. In a possible embodiment, the blocking element 98 is designed as a molded component with a flat stop surface 99 .

6 schematically shows a perspective representation of an upper side 74 of the pretensioning element 7 and 7 shows a schematic perspective view of an underside 75 of the pretensioning element 7.

The first rolling elements 61 are mounted rotatably in the bearing area 72 on the pretensioning element 7 by means of bearing bolts 60 .

The prestressing element 7 comprises two holding elements 76 for attachment to the upper rail 31. The holding elements 76 are hook-shaped and are held in a manner not shown in detail in hook openings in the upper rail 31 in a positive and/or non-positive manner, in particular hooked. In the embodiment according to 4 and 5 these hook openings are covered by the fastening element 10 .

In a further development, the holding elements 76 are provided to receive a fastening element 200 arranged on and/or in the upper rail 31 . In the mounted state, the retaining elements 76 are in snap-in engagement with the fastening element 200 . This ensures that the pretensioning element 7 is positioned and held in and/or on the upper rail 31 . The fastening element 200 is, for example, a fastening bolt or fastening pin. The fastening element 200 is arranged between the side walls 312 of the upper rail 31 and is connected to them, for example, in a materially, non-positively and/or form-fitting manner, for example by welding, gluing or riveting.

reference list

1

Seat

2

seat adjustment device

3

pair of rails

31

top rail

311

wall

312

Side wall

32

bottom rail

321

bottom wall

322

Side wall

323

End

324, 325

rolling surface

33

breakthrough

34

opening

35

free end

36

passage opening

37

thigh area

38

top of the top rail

381 to 384

recess

39

underside of the top rail

4

locking element

41

head Start

42

intervention opening

43

recording

5

cavity

6

rolling element

60

bearing pin

61

first rolling element

62

second rolling element

7

biasing element

71

carrier area

711

longitudinal end

712

lateral side

72

storage area

73

spring range

731

end section

74

top

75

bottom

76

holding element

8th

mounting bolts

9

actuator

91

operating range

92

coupling area

93

hooked projection

94

control cam

95

pivot bearing

96

axis

97

Weld

98

blocking element

99

stop surface

10

fastener

101

intake opening

102

welded joint

11

return element

200

fastener

B.A

actuation axis

P1, P2, P31, P32

arrows

S1

locked position

X

X-axis direction, longitudinal direction

Y

Y axis direction, transverse direction

Z

Z axis direction, vertical direction

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 1227950 B1 [0002]

Claims (10)

Prestressing element (7) for a pair of rails (3) of a longitudinal seat adjustment device (2), with at least - a rolling element (6, 61), and - a bearing area (72) for rotatably supporting the rolling element (6, 61) and a spring area (73), the spring area (73) being provided, the bearing area (72) and the rolling element (6, 61) on a rail (31 , 32) of the pair of rails (3) to be resiliently supported, - wherein the bearing area (72) and the spring area (73) are formed in one piece. Biasing element (7) after claim 1 , comprising a with the bearing area (72) and the spring area (73) integrally formed carrier area (71) which is arranged between the bearing area (72) and the spring area (73) and connects them to each other. Biasing element (7) after claim 2 wherein the spring portion (73) is disposed at one longitudinal end (711) of the support portion (71) and protrudes at a predetermined angle therefrom. Biasing element (7) after claim 2 or 3 , The bearing area (72) being arranged on a lateral side (712) of the carrier area (71) and protruding substantially perpendicularly therefrom. Biasing element (7) according to one of claims 2 until 4 , wherein the bearing area (72) and the spring area (73) are arranged on the carrier area (71) in such a way that they protrude from a plane defined by the carrier area (71) in the same direction. Prestressing element (7) according to one of the preceding claims, wherein the spring area (73) is designed as a clip spring, punch spring or leaf spring. A biasing member (7) as claimed in any preceding claim, wherein the rolling member (6, 61) is secured to the bearing portion (72) by a bearing pin (60). Longitudinal seat adjustment device (2) for a seat (1), in particular a vehicle seat, comprising at least one pair of rails (3) with an upper rail (31) and a lower rail (32) which can be moved relative to one another, and a pretensioning element (7) according to one of the The preceding claims, wherein the upper rail (31) and the lower rail (32) are prestressed towards one another and movably arranged by means of the prestressing element (7) arranged between them. Longitudinal seat adjustment device (2). claim 8 , wherein the upper rail (31) comprises at least one recess (381) on its upper wall (311), from which the at least one rolling element (6, 61) protrudes at least in sections in order to roll on the lower rail (32). Longitudinal seat adjustment device (2). claim 8 or 9 , wherein the prestressing element (7) is arranged on the upper rail (31) in such a way that the spring area (73) is supported with its end section (731) protruding from the carrier area (71) on the upper wall (311) of the upper rail (31) and resiliently prestresses the bearing area (72) and the rolling element (6, 61) rotatably mounted thereon in the direction of the upper wall (311).

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