CN117677532A - Device for longitudinally adjusting a seat and seat - Google Patents

Abstract

The invention relates to a device (2) for longitudinally adjusting a seat, comprising at least: two spaced track pairs (3) and at least one locking element (4), wherein: the track pairs (3) are formed by an upper track (31) and a lower track (32) which are movable relative to each other, respectively; said at least one locking element (4) is mounted movably on the upper rail (31) in a spring-loaded manner and in a locked position (S1) blocks movement of the upper rail (31) in the lower rail (32) and in an unlocked position (S2) releases movement; and undesired movement of the locking element (4) out of the locking position (S1) is at least limited or blocked by a blocking element (98). The invention also relates to a seat (1) having such a device (2) for longitudinally adjusting the seat.

Description

Device for longitudinally adjusting a seat and seat

Technical Field

The invention relates to a device for longitudinally adjusting a seat, in particular a vehicle seat. The invention further relates to a seat, in particular a vehicle seat.

Background

The device for longitudinally adjusting a seat generally comprises two rail pairs which are arranged at a distance from one another and which are each composed of two rails, an upper rail assigned to the seat and a lower rail assigned to the bottom of the vehicle. The device for longitudinally adjusting the seat further comprises at least one spring-loaded movable plate-like locking member which is held on the upper rail and which in the locked position prevents movement of the upper rail in the lower rail. Here, the lower rail may have a hole, while the upper rail is provided with an opening, and the locking member carries on its two opposite longitudinal sides a projection which in the locked position is movable by a spring into both the opening and the hole. Such a device for longitudinally adjusting a seat is known, for example, from european patent EP1227950B 1.

Disclosure of Invention

The object of the invention is to provide an improved device for longitudinally adjusting a seat and a seat having an improved device for longitudinally adjusting a seat.

With respect to the device for longitudinally adjusting a seat, this object is achieved according to the invention with the features of claim 1.

In the case of a seat, this object is achieved according to the invention with the features of claim 15.

Advantageous further developments are the subject matter of the dependent claims.

According to the invention, this object is achieved by a device for longitudinally adjusting a seat, comprising at least two rail pairs and at least one locking element, which are arranged at a distance from each other, wherein the rail pairs are formed by an upper rail and a lower rail, respectively, which are movable relative to each other, and wherein the at least one locking element is spring-loaded and movably held on the upper rail and blocks a movement of the upper rail in the lower rail in a locked position and releases the movement in an unlocked position, and wherein an undesired movement of the locking element out of the locked position is limited or blocked by a blocking element.

The blocking element is preferably formed as an internal blocking element. In particular, the blocking element is arranged in a cavity formed between the upper rail and the lower rail. The blocking element is thereby arranged in a protected manner and ensures a locking position of the locking element in the locking position even under mechanical loading.

Such blocking or stopping elements ensure that in the locked position of the locking element, movements caused by mechanical loads (e.g. due to an accident, such as a rear end collision), in particular horizontal movements or lateral movements of the locking element out of the locked position, are at least limited or completely blocked. As a result, the locking element remains in its locked position, and thus the means for longitudinally adjusting the seat is blocked and the seat is in its set longitudinal position. In other words: the blocking element and the locking element form a double lock. Unlocking of the locking element can only be achieved by a rotational movement of the actuating element, in particular the unlocking lever. As long as the actuation element is not actuated, the locking element cannot be independently unlocked due to longitudinal loading or momentum.

The blocking element may be fastened to, for example, the upper rail. For example, the blocking element may be fastened to the upper rail while engaging therethrough. Such a fastening of the blocking element to the upper rail can in a simple manner enable the blocking element to be moved firmly together with the upper rail with an adjustment of the upper rail relative to the lower rail.

For example, the blocking element is arranged on the inner wall of the upper rail in such a way that an undesired movement of the locking element away from the locking position, in particular a horizontal movement or a lateral movement, is blocked or limited in such a way that the locking position of the locking element is fixed.

The locking element may additionally be formed partly inclined or arched or uneven, for example on the side facing the blocking element. The blocking element may be formed partially to be relatively inclined or relatively arched or relatively uneven on a side corresponding to the locking element facing the locking element. Such a configuration, which corresponds to the respective facing sides of the locking element and the blocking element, in particular the longitudinal sides, can additionally in a simple manner, in the presence of undesired mechanical loads on the upper rail in the longitudinal direction, enable the blocking element and the locking element to be wedged (wedging) so that the locking element is held firmly in the locking position. In particular, the locking element remains in the locked position in the event of an undesired excitation or impact in the longitudinal direction.

The upper rail is for example formed as a U-shaped profile with two longitudinal sides, one of which is provided with an opening for locking engagement by a locking element, wherein the longitudinal side with the opening is formed partly in a profiled manner. For example, the longitudinal sides of the upper rail are provided as crowned profiles or partly with elevations and/or depressions. Thereby, the distance between the longitudinal sides of the upper rail and the longitudinal sides of the lower rail can be easily adjusted, in particular enlarged, so that the locking function of the locking element can be improved.

Furthermore, the upper rail and the lower rail are arranged to be pretensioned relative to each other in the locked position by means of a spring-loaded locking element. A simple play-free position between the upper rail and the lower rail is achieved and dynamic control of the locking element is prevented by such a spring-loaded locking element. Furthermore, the locking element may also be formed as a double lock.

In particular, the locking element is arranged and configured in such a way that, in the unlocking situation, it is initially located in the region of the locking position, can be rotated into the intermediate position and can subsequently be adjusted from the intermediate position into the unlocking position, in particular can be moved or extracted linearly or arcuately.

For example, the locking element is held in a force-fitting manner, in particular in a friction-fitting manner, in the transverse direction in the locked position and can be moved in a limited manner in the vertical direction. In particular, the locking element blocks the upper rail and the lower rail in the longitudinal direction.

For unlocking the upper rail and the lower rail, the locking element in the locked position can initially be held in a force-fitting manner by a rotary movement and can be moved from the locked position into the unlocked position, in particular pivotably and withdrawable, by a combined rotary pulling movement or an arcuate movement.

The invention achieves the advantage, inter alia, that the locking element remains in its locking position even in the event of undesired mechanical loads, for example due to an accident. In particular, the locking element remains in the locked position in the event of an undesired excitation or impact in the horizontal or transverse direction.

Furthermore, even in the case of very large adjustment angles, component tolerances can be compensated for by the spring-loaded locking element, and mechanical loads can be at least reduced or avoided in the case of control of the locking element. In particular, in the case of high-frequency excitation, the locking element can only be controlled slightly out of the play-free position and then be stopped or blocked in the locking position, which is still sufficiently locked, by a stop element or blocking element, in particular a horizontal stop or a transverse stop. Dynamic control of the locking element is thus largely prevented. Furthermore, a simple play-free position between the lower rail (also referred to as guide rail) and the upper rail (also referred to as rail slide rail) can be achieved by means of a spring-loaded locking element. Furthermore, by using a combined movement of the rotary movement and the pulling movement, a simple clamping-locking function of the locking element can be ensured without additional components.

For example, the locking element is held in a pretensioned manner by a spring element. The spring element makes it possible to achieve a tensioning function. The blocking element enables the locking element to have a blocking function in the locked position. This means that in the case of undesired mechanical loads, the locking element is blocked in the locked position by the blocking element and is thus "snapped" or held. During unlocking of the locking element, in particular in the case of a desired unlocking movement out of the locking position, such a blocking function is circumvented by a combined rotary and pulling movement of the locking element and thus by the locking of the locking element, such that the rail pair is unlocked and the upper rail is movable, in particular adjustable, relative to the lower rail.

The locking element is formed as a horizontal lock and in this case locks the upper rail and the lower rail relative to each other in a simple manner with a play-free position. In other words: the upper rail and the lower rail are pretensioned relative to each other in the locked position by means of a spring-loaded locking element. For example, the locking element is formed as a locking plate from which a plurality of projections, in particular teeth, protrude laterally on at least one side, in particular the longitudinal side. Furthermore, the locking element may be formed as a double lock.

A further improvement provides an actuating element for the locking element, wherein the actuating element is arranged in an inner space formed between the upper rail and the lower rail. In particular, the actuating element is arranged in the upper rail. This arrangement of the actuating elements within the respective track pairs enables a particularly compact arrangement.

For example, the upper rail has a through opening through which the actuating element can be actuated.

On the other hand, it is provided that the actuating element is movably arranged on the upper rail, in particular rotatably mounted thereon. For example, the actuating element is formed as an actuating lever. By rotating the actuating element, the locking element in its locking position can be rotated into an intermediate position in order to be subsequently adjusted, in particular pulled, from this intermediate position into an unlocking position, for example moved linearly or arcuately.

The actuation element may further comprise at least one actuation region and a coupling region.

For example, the actuation area extends at least into or through the through opening. The actuation region can be actuated by a motor, in particular by an electric motor, or manually, by means of an unlocking device in a manner not shown in more detail.

The coupling region comprises, for example, at least one hook-shaped projection and a control cam. By means of a control cam of the actuating element, the locking element is adjustable by a combined rotary pulling movement between the locking position and the unlocking position. For example, in the locking position, the locking element can be rotated by means of a first rotational movement of the actuating element, so that the locking element is adjusted into free space for the linear movement. By means of the hook-shaped projection, the locking element can be moved, in particular withdrawn, linearly, in particular approximately linearly, from the locking position into the unlocking position upon further rotation of the actuating element.

The object is also achieved by a seat, in particular a vehicle seat, having a device for longitudinally adjusting the seat as described above.

In summary and in other words, the present invention provides a device for longitudinally adjusting a seat, which enables a simple play-free position between a rail (also called lower rail) and a rail slide (also called upper rail) by means of a locking element and prevents dynamic control of the locking element. The unlocking of the locking element is configured such that it initially rotates downwards and is then extracted from the teeth of the guide profile. In the case of high-frequency excitation, the locking element can only be controlled to leave slightly the play-free position and then be stopped by a lateral stop (also called blocking element) in a position which is still sufficiently locked.

Drawings

Exemplary embodiments of the present invention are explained in more detail based on the drawings. In the drawings:

fig. 1 schematically shows a perspective view of a seat, in particular a vehicle seat, with a device for longitudinally adjusting the seat, which device comprises two rail pairs,

figure 2 schematically shows a cross-sectional view of a rail pair in the region of a locking element according to a first exemplary embodiment of the invention,

Figure 3 schematically shows a cross-sectional view of a further alternative rail pair in the region of a locking element according to a second exemplary embodiment,

figure 4 schematically shows a perspective view of the upper side of the upper track,

figure 5 schematically shows a perspective view of the underside of the upper track,

figures 6 to 8 schematically show the unlocking sequence of the locking element,

fig. 9 schematically shows a cross-sectional view in the longitudinal direction of a device for longitudinally adjusting a seat according to a third exemplary embodiment, an

Fig. 10 to 12 schematically show the unlocking sequence of the locking element according to fig. 9.

Corresponding parts are provided with the same reference numerals throughout the figures.

Detailed Description

Fig. 1 shows schematically in perspective view a seat 1, in particular a vehicle seat, having a device for longitudinally adjusting the seat 2. The seat 1 is arranged, for example, on a vehicle chassis, not shown in more detail, by means of a device for longitudinally adjusting the seat 2.

The seat 1 shown schematically in fig. 1 is described hereinafter using three spatial directions extending perpendicularly to each other. In the case of a seat 1 installed in a vehicle, the longitudinal direction x extends substantially horizontally and preferably parallel to the longitudinal direction of the vehicle, which corresponds to the normal direction of travel of the vehicle. The transverse direction y extending perpendicular to the longitudinal direction x is likewise oriented horizontally in the vehicle and extends parallel to the transverse direction of the vehicle. The vertical direction z extends perpendicular to the longitudinal direction x and perpendicular to the transverse direction y. In the case of a seat 1 installed in a vehicle, the vertical direction z preferably extends parallel to the vertical axis of the vehicle.

The position and direction indications used, such as for example front, rear, top and bottom, relate to the viewing direction of an occupant sitting on the seat 1 in a normal sitting position, wherein the seat 1 is mounted in a vehicle in a position for transporting persons using the upright backrest 1.1 and is oriented in a conventional manner in the direction of travel. However, the seat 1 may also be mounted or moved in alternative orientations (e.g. opposite to the direction of travel).

The means for longitudinally adjusting the seat 2 comprise two pairs of rails 3, for example arranged at a distance from each other. Each track pair 3 comprises an upper track 31, also called track rail or seat track, and a lower track 32, also called guide track or base track. 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 the position of the seat 1 to be set longitudinally, with the front end position of the upper rail 31 being designated as the forward-most position of the seat 1 and the rear end position of the upper rail 31 being designated as the rearward-most position of the seat 1.

The device for longitudinally adjusting the seat 2 further comprises at least one locking element 4. Each track pair 3 may then comprise an associated locking element 4, as will be described in more detail below on the basis of fig. 2 to 12.

Fig. 2 schematically shows a section through one of the rail pairs 3 in the region of the associated locking element 4.

Fig. 3 schematically shows a sectional view through a further alternative rail pair 3 in the region of the associated locking element 4. The two track pairs 3 have substantially the same structure and correspond to each other in terms of structure and function, unless otherwise described below.

The two rail pairs 3 according to fig. 2 and 3 differ only in terms of the structure of the actuating element 9 for the locking element 4.

The corresponding locking element 4 is formed as a double lock. Within the meaning of the present invention, the term "double lock" is to be understood in particular such that the respective locking element 4 in the locking position S1 (shown in fig. 2 to 6 and 9, 10) on the one hand prevents a movement of the upper rail 31 (also called rail slide) relative to the lower rail 32 (also called guide rail) and on the other hand at least limits or blocks an undesired movement of the respective locking element 4 in the locking position S1 by means of the blocking element 98.

At least one locking element 4 is retained or held in a spring-loaded manner on and is movable, in particular rotatably mounted and movable, in particular adjustable by a combined rotation-pulling movement or arcuately movable, on the upper rail 31.

The blocking element 98 is arranged in a cavity 5 (shown in fig. 2 and 3) formed between the upper rail 31 and the lower rail 32. The blocking element 98 is in particular fastened to the upper rail 31. The blocking element 98 is preferably fastened to the upper rail 31 by material bonding, for example welding. Alternatively, the blocking element 98 may be connected to the upper track 31 in a form-fitting and/or force-fitting manner.

The locking element 4 is guided directly, for example only in the engagement hole or opening 34 of the upper rail 31, in particular during pivoting of the locking element 4 in the locking position S1. During an unlocking movement out of the locking position S1 into the unlocking position S2 (shown in fig. 8), the locking element 4 is unlocked in a controlled manner by means of a combined rotary pulling movement by means of the actuating element 9. The locking element 4 does not have a defined axis of rotation.

A return element 11, in particular a return spring, is furthermore provided, as shown in fig. 2 to 4. The resetting element 11 is held at one end 11.2 on the upper rail 31 and at the other end 11.1 on the locking element 4. The locking element 4 blocks the movement of the upper rail 31 in the lower rail 32 in the locking position S1 as shown in each case in fig. 2 and 3.

The reset element 11 is tensioned during unlocking. When the unlocking force is removed, the resetting element 11 relaxes, so that the locking element 4 automatically returns into the locking position S1 by means of the resetting element 11. The return element 11, in particular its spring force, is configured such that it pushes the locking element 4 into the locking position S1. In other words: the locking element 4 is spring-loaded adjusted, in particular pushed, into the locking position S1, so that the upper rail 31 and the lower rail 32 are arranged relative to one another in a play-free manner. In particular, the upper rail 31 and the lower rail 32 are pretensioned with respect to each other by means of the spring-loaded locking element 4 in the locking position S1.

In particular, the locking element 4 is arranged and configured such that it is rotatable during unlocking at least in the region in the locking position S1 and is subsequently adjustable from the locking position S1 into the unlocking position S2 (shown in fig. 8), in particular movable or extractable linearly or arcuately.

For example, the locking element 4 is held in a force-fitting manner, in particular in a friction-locking manner, in the transverse direction y in the locking position S1 and can be moved in a limited manner in the vertical direction z. In particular, the locking element 4 blocks the upper rail 31 and the lower rail 32 in the longitudinal direction x.

For unlocking the upper rail 31 and the lower rail 32, the respective locking element 4 in the locking position S1 according to fig. 2 or 3 is held from the initial force fit by a rotational movement about the axis of rotation in the longitudinal direction x, in particular is movable into the intermediate position S3 (as shown in fig. 7), and is movable, in particular is withdrawn, from the locking position S1 into the unlocking position S2 by a linear or arcuate movement.

In the unlocking position S2 shown in fig. 8, the locking element 4 releases the movement of the upper rail 31 relative to the lower rail 32. In this case, the locking element 4 is arranged and configured in such a way that, in the event of unlocking, it is initially rotatable in the region of the locking position S1 and can then be adjusted, in particular withdrawn, from the locking position S1 into the unlocking position S2 (also referred to as the release position).

The sequence of movements during unlocking is described in detail below on the basis of fig. 6 to 8. Thus, by using a combined movement of the rotational movement and the pulling movement of the locking element 4, a simple clamping-locking function can be ensured for the locking element 4 without additional components.

The locking element 4 is formed as a horizontal lock in the longitudinal direction x. Furthermore, the locking element 4 is held in frictional engagement on at least one of the rails 31, 32, in particular on the upper rail 31. A simple play-free position between the lower rail 32 and the upper rail 31 is achieved by means of the spring-loaded locking element 4.

The means for longitudinally adjusting the seat 2 additionally comprise a stop element or blocking element 98 which at least limits or blocks undesired movement of the locking element 4 out of the locking position S1. The blocking element 98 is formed, for example, as a profile body extending in the longitudinal direction x. The blocking element 98 is arranged in the upper rail 31 and is fastened, in particular welded, thereto. The blocking element 98 may additionally be formed as a support for the actuating element 9.

The blocking element 98 is arranged parallel to the locking element 4 in the upper rail 31. The blocking element 98 extends in the longitudinal direction x at least over the entire length of the locking element 4. The blocking element 98 may have a greater length than the locking element 4. The blocking element 98 has a correspondingly shaped stop surface 99 along the side directed towards the locking element 4. Thus preventing dynamic control of the locking element 4 out of its locking position S1. In particular, the forces which are undesirably introduced onto the locking element 4 are released onto the upper rail 31 via the blocking element 98 in the locking position S1. The blocking function of the locking element 4 in its locking position S1 is achieved by the blocking element 98.

This latching function, and thus the locking of the locking element 4 by the locking element 98, is avoided by the combined rotary and pulling movement of the locking element 4 during its unlocking, so that the rail pair 3 is unlocked and the upper rail 31 can be moved, in particular adjusted, relative to the lower rail 32.

In order to prevent movement of the upper rail 31 relative to the lower rail 32 to prevent seat displacement, the lower rail 32 is provided with a plurality of holes 33 and the upper rail 31 is provided with a plurality of openings 34. The projections 41, in particular toothed projections 41, of the locking element 4 in the locking position S1 engage into these holes 33, in particular slotted through openings, and into the openings 34, in particular slotted or comb-shaped openings, so that movement between the upper rail 31 and the lower rail 32 is blocked. In particular, the projection 41 of the locking element 4 is held in friction engagement on at least one of the rails 31, 32, in particular in the hole 33 of the upper rail 31.

The upper rail 31 is formed of a sheet metal profile bent into a U-shape. The lower rail 32 is formed, for example, from a pressed aluminum profile. Here, the profile may be configured such that the cross-sectional free ends 35 of the upper rail 31 and the lower rail 32 are engaged with each other, with the result that the upper rail 31 is base-fixed in the vertical direction z (z-axis direction).

In the mounted position of the upper rail 31 on the lower rail 32 they adjoin the cavity 5 inside the device for longitudinally adjusting the seat 2.

The longitudinal setting of the seat 1 relative to the vehicle base is performed via the longitudinal displacement of the upper rail 31 relative to the lower rail 32. In this case, the upper rail 31 and the lower rail 32 contact each other via the rolling elements 6 only in a specific guide area. With the seat longitudinally disposed in the vertical direction z (z-axis direction), the upper rail 31 (also referred to as rail slide) is in normal operation, fixed in relation to the lower rail 32 in a spring-pretensioned manner, and movable in the longitudinal direction x (x-axis direction) by at least one or more of the rolling elements 6. In the remaining region, the lower rail 32 and the upper rail 31 are spring-preloaded by the bearing via the rolling elements 6 and are therefore arranged at a distance from one another in a play-free manner.

In order to spring pretension the upper rail 31 against the lower rail 32 via the at least one rolling element 6, a pretensioning element 7 is provided which is arranged in the upper rail 31. In particular, the pretensioning element 7 is arranged in the cavity 5.

The pretensioning element 7 enables a simple play-free position between the lower rail 32 and the upper rail 31 during the longitudinal adjustment of the seat 1. The movable upper rail 31 moves in a spring-tensioned manner in the lower rail 32.

For this purpose, the pretensioning element 7 is embodied as a multifunctional component which is formed simultaneously as a carrier, spring and support for at least one or more rolling elements 6. The pretensioning element 7 is in particular a profile element, a formed sheet metal part or a punched sheet metal part.

For example, the pretensioning element 7 comprises a carrier area 71 formed by a carrier plate. The carrier region 71 is shaped, in particular bent, in such a way that a bearing region 72 and a spring region 73 are formed. The spring region 73 may, for example, be formed as a leaf spring having an inner bore (e.g., in the form of an elongated bore). The spring region 73 may be bent a plurality of times. The bearing area 72 is formed to receive the bearing bolts 60 (as shown) for the first rolling element 61 or both first rolling elements 61.

The respective pretensioning is produced by the pretensioning element 7 being supported on the lower rail 32 via the first rolling element 61 and on the upper rail 31 via the spring region 73, so that a play-free position between the rails 31, 32 of the respective rail pair 3 is achieved. In other words: the invention enables the upper track 31 with at least one or more spring-pretensioned first rolling elements 61 to move relative to the lower track 32 to avoid free play in the lower track 32 or the guide track.

For example, the first rolling element 61 is rotatably mounted on the pretensioning element 7 and is arranged by means of these elements in a spring pretensioned manner on the upper rail 31, in particular on the rail track. In this case, the spring region 73 of the pretensioning element 7 supported on the upper rail 31 (rail slide) transmits pretensioning to the bearing region 72 and via this bearing region to the first rolling element (S) 61 which are arranged in a spring-pretensioned manner on the lower rail 32 via an opening or recess 381 in the upper rail 31 in the locking position S1 and/or which roll in a spring-pretensioned manner on the contact surface of the lower rail 32 in the unlocking position S2 or in the release position.

The means for longitudinally adjusting the seat 2 further comprise at least one second rolling element 62, sliding roller or sliding cylinder for longitudinally adjusting the seat 1.

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

For fastening the lower rail 32 to the vehicle chassis, for example the vehicle base, a fastening bolt 8 is provided, which is guided through a through opening of the base section of the lower rail 32 for fastening to the vehicle chassis.

The device for longitudinally adjusting the seat 2 also comprises an actuating element 9 for the purpose of longitudinal setting of the seat 1.

The actuating element 9 is arranged in a cavity 5 (also referred to as an inner space) formed between the upper rail 31 and the lower rail 32.

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 formed as an actuating lever, in particular a rotary lever, which is rotatably mounted on the upper rail 31. For this purpose, the actuating element 9 comprises a rotary support 95 (shown for example in fig. 2) which is arranged on the upper rail 31. The actuating element 9 further comprises at least one actuating region 91 and a coupling region 92. The actuation area 91 is formed as an actuation arm or actuation protrusion.

In the embodiment according to fig. 2, the actuation region 91 in the locking position S1 protrudes through the through-opening 36 and beyond the upper rail 31 and into the open arm (open limb) region 37 of the U-shaped lower rail 32, so that the actuation region 91 can be actuated to unlock the locking element 4.

In the alternative embodiment according to fig. 3, the actuating region 91 of the actuating element 9 protrudes into the through-opening 36 and can be actuated from above through the open arm region 37 of the U-shaped lower rail 32 for unlocking the locking element 4.

The coupling region 92 is formed in a manner corresponding to the contact region of the locking element 4. The coupling region 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 into which the hook-shaped projection 93 of the coupling region 92 engages. The control cam 94 rests in particular on the upper side of the plate-shaped locking element 4.

The actuating element 9 is actuated to unlock the locking element 4, wherein the actuating region 91 is actuated in the direction of the through opening 36 and into the through opening, in particular pushed according to arrow P1, so as to pivot about the actuating axis BA according to arrow P2, so that the control cam 94 engaging the locking element 4 initially tilts the plate-shaped locking element 4 downwards or rotates according to arrow P31. In this case, and by further actuating the actuation region 91 into the cavity 5, the hook-shaped projection 93 travels into the engagement opening 42 until the hook-shaped projection 93 engages around the locking element 4 and, in the event of further actuation pulling its projection 41, completely disengages from the hole 33 of the lower track 32 according to arrow P32. Thereby, the locking element 4 with its particularly toothed projection 41 is disengaged from the comb-like or slot-like aperture 33 of the lower rail 32, so that a not shown release position can be achieved and the upper rail 31 can be moved, particularly longitudinally adjusted, relative to the lower rail 32.

The above-mentioned unlocking movement or extraction movement is assisted by the actuation region 91 and the underside of the control cam 94 facing the locking element 4. The underside of the actuation region 91 and the underside of the control cam 94 respectively bear against or are in contact with the upper side of the locking element 4. In the event of a further actuation of the actuating element 9, the hook-shaped projection 93 presses the locking element 4 in the direction of arrow P32, in particular against the inner surface of the engagement opening 42, wherein the actuating region 91 and the control cam 94 are pushed onto the locking element 4 from above and assist the extraction movement of the projection 41 according to arrow P2.

Actuation of the actuation element 9 is performed as a continuous movement such that the locking element 4 is adjusted from the locking position S1 via the intermediate position S3 to the unlocking position S2 via a continuous combined rotational movement and pulling movement.

Fig. 4 schematically shows a perspective view of the upper side 38 of the upper rail 31.

The actuation region 91 of the actuation element 9 protrudes into the through opening 36. The tooth-shaped projection 41 of the locking element 4 is in the locking position S1 and protrudes through the hole 33 in the upper rail 31.

At the end side, the fastening element 10 may be arranged on the upper rail 31. The fastening element 10 may be formed in different ways depending on the type of seat fastening. In the exemplary embodiment shown in accordance with fig. 4, the fastening element 10 is formed as a jaw fastener, which in each case comprises a receiving opening 101 into which a jaw, not shown in more detail, of the seat 1 engages in a retaining manner. Alternatively, the fastening element 10 may be designed to fasten the seat 1 to the upper rail 31 by means of a threaded connection or a welded connection. The respective fastening element 10 is fastened to the upper rail 31 in a force-fitting manner, in a form-fitting manner and/or by means of a material bond. For example, the respective fastening element 10 is fastened to the upper rail 31 by means of a welded connection 102.

For spring-pretensioned roller guidance, the upper rail 31 comprises a recess 381 (shown in fig. 4) on its upper side 38, from which at least the first rolling element 61 protrudes for rolling on the lower rail 32, as shown in fig. 2 and 3. The first rolling element 61 is arranged in a spring-preloaded and movable manner on the upper rail 31 by means of the pretensioning element 7 and rolls in a spring manner on the contact surface of the lower rail 32.

The upper rail 31 may also comprise a further recess 382 on its upper side 38 into which the second rolling element 62 protrudes at least and extends "freely".

Furthermore, the upper rail 31 has in the region of the locking element 4 at least one further recess 383 in which one end of the resetting element 11 is held.

The further recess 384 serves as a receiving rotary support 95 for the actuating element 9.

Fig. 5 schematically shows a perspective view of the underside 39 of the lower track 31. The restoring element 11, in particular a spring, such as a wire spring or a yoke spring, is held on the locking element 4 at the other end in the receptacle 43.

As shown in this figure, the locking element 4 may comprise two engagement openings 42. Correspondingly, the actuating element 9 then has two hook-shaped projections 93 which engage with these engagement openings 42. In this case, the means for longitudinally adjusting the seat 2 comprise two second rolling elements 62, each arranged at one end of the upper rail 31. The second rolling element 62, in particular a sliding element for longitudinally adjusting the seat 1, is formed for example as a rolling roller or spool. The second rolling elements 62 have a fixed axis which is fastened to the upper rail 31 and on which the second rolling elements 62 rotate.

The device for longitudinally adjusting the seat 2 further comprises two pretensioning elements 7, which are each arranged between one of the second rolling elements 62 and the central locking element 4.

The bearing region 71 of the respective pretensioning element 7 is formed in a layer-like and planar manner. The respective spring region 73 is formed as a yoke spring or a punch spring or a leaf spring. In each case a pair of first rolling elements 61 is rotatably mounted on the respective pretensioning element 7. For this purpose, the respective pretensioning element 7 comprises in the associated bearing zone 72 the bearing bolt 60 shown in fig. 5.

The rotary support 95 of the actuating element 9 comprises a fixed axis 96. The rotary support 95 is fastened on the inside to the upper rail 31, in particular welded by means of a weld 97. The rotary support 95 is for example formed as a rod-shaped molded part for carrying and mounting the pivotable actuating element 9.

The rotary support 95 can simultaneously form a stop or blocking element 98 for the locking element 4, in particular a horizontal stop or a transverse stop. Alternatively, the rotational support 95 and the blocking element 98 may be formed as separate components. The blocking element 98 is fastened on the inside to the upper rail 31, in particular by means of a weld 97, connected to the upper rail 31 by material bonding.

Unwanted movement of the locking element 4 out of the locking position S1 is limited or blocked by means of the blocking element 98.

In particular, a horizontal movement or a lateral movement of the locking element 4, for example, can be at least limited or completely blocked by means of the blocking element 98, for example, due to a mechanical load on the locking element 4, in particular in the event of an excitation or impact in the horizontal or lateral direction y (y-axis direction), for example as a result of an accident. The blocking element 98 is arranged and constructed in such a way that the locking element 4 remains in the locking position S1 irrespective of a possibly undesired horizontal movement or lateral direction. The means for longitudinally adjusting the seat 2 are thus blocked and the seat 1 is fixed in its set longitudinal position. The snap-in function of the locking element 4 in its locking position S1 is achieved by means of the blocking element 98.

The rotational support 95 and the blocking element 98 may be formed as one piece or as separate pieces. In one possible embodiment, the blocking element 98 is formed as a molded part with a flat stop surface 99.

Some of the projections 41, in particular the first projection 41.1 and the second projection, in particular the last projection 41.2, of the locking element 4 are formed conically at least in some areas, as seen in the longitudinal extension of the locking element 4. In other words: the first projection 41.1 and the second projection, in particular the last projection 41.2, have in the contact area with the rails 31, 32 respectively inclined flanks forming a clamping angle. Due to the formation of the inclined sides on at least the first projection 41.1 and the second projection, in particular the last projection 41.2, the locking element 4, in particular the snap plate, moves according to arrow P4 in the direction of the blocking element 98, under a high longitudinal load oriented perpendicular to the longitudinal direction of the locking element 4, until it abuts against the stop surface 99.

The locking element 4 can only be unlocked by a rotational movement of the actuating element 9, in particular the unlocking lever. As long as the actuating element 9 is not actuated, the locking element cannot be automatically unlocked due to a longitudinal load or pulse.

Fig. 6 to 8 schematically show an unlocking sequence of the locking element 4, which sequence is described in more detail below:

fig. 6 corresponds to the embodiment according to fig. 2. Reference is made to the description with respect to fig. 2. In this embodiment, the rotational support 95 and the blocking element 98 are formed separately.

At the beginning of the unlocking movement of the locking element 4, the actuating element 9 can be actuated mechanically or electromechanically according to arrow P1. Alternatively or additionally, the actuating element 9 may be rotated electromechanically according to arrow P2.

In this case, the actuation region 91 is moved in the direction of the through opening 36 of the upper rail 31 and is actuated into this through opening, in particular pushed according to arrow P1, in order to rotate or pivot about the actuation axis a according to arrow P2, so that the control cam 94 which engages the locking element 4 initially tilts or rotates the plate-shaped locking element 4 downwards according to arrow P31. The actuation axis BA is identical to the axis 96 (shown in fig. 5). The actuating element 9 rotates into the cavity 5. The locking element 4 still performs a rotational movement or tilting movement according to arrow P31 in the locking position S1 in the region, in particular only a small rotational movement or tilting movement. As the locking element 4 is rotated at its inner end downwards according to arrow P31, in the locking position S1 the projection 41 is pivoted upwards according to arrow P33 in the opening 34 and the hole 33, as shown in fig. 2 and 3. Further, the protrusions 41 engage the apertures 33 through the openings 34 of the lower track 32 and the upper track 31.

The locking element 4 is adjusted to the intermediate position S3. This is not a fixed position, but rather an intermediate position S3 of a continuous unlocking movement of the locking element 4, which is controlled by means of the actuating element 9, wherein the unlocking movement is a combined rotary pulling movement. In the case of an unlocking movement, the locking element 4 in the upper rail 31 is first pushed downwards in order to travel out of the blocking area of the blocking element 98. As shown in fig. 2 and 3, the locking element 4 is then pulled according to arrow P32 by means of a pulling force past the blocking element 98 and at least in some areas into the upper rail 31.

By further actuating the actuation region 91, in particular by rotating into the cavity 5 according to arrow P2, the hook-shaped projection 93 travels into the engagement opening 42 of the locking element 4 until the hook-shaped projection 93 engages around or behind the locking element 4.

In the event of a further actuation of the actuating element 9, in particular by a further rotation according to arrow P2, the locking element 4, in particular its projection 41, is displaced, in particular at least completely withdrawn from the hole 33 of the lower track 32 according to arrow P32. Thereby, the locking element 4 and in particular the tooth-like projections 41 thereof are disengaged from the comb-like or slot-like holes 33 of the lower rail 32, such that the locking element 4 is adjusted to its release or unlocking position S2 and the upper rail 31 is movable, in particular longitudinally adjustable, relative to the lower rail 32. Hereby, a simple clamping and locking function of the spring-loaded locking element 4 can be ensured without additional components by using a combined movement of a rotational movement and a pulling movement.

Actuation of the actuation element 9 is performed as a continuous movement such that the locking element 4 is adjusted from the locking position S1 via the intermediate position S3 to the unlocking position S2 via a continuous combined rotational movement and pulling movement.

In addition to blocking the locking element 4 in the locking position S1 by means of the blocking element 98, this blocking element can also form a stop element and be arranged, for example, on the upper rail 31 in such a way that an actuation movement of the actuating element 9 into the unlocking position S2 is at least limited or prevented. In particular, this movement of the actuating element 9 into the unlocking position S2 is limited or blocked by means of the blocking element 98 in such a way that the projection 41 of the locking element 4 engages further into the opening 34 of the upper rail 31 in its unlocking position S2. The actuating element 9 strikes the blocking element 98 in the actuating direction according to arrow P2.

Fig. 9 schematically shows a cross-sectional view of a device for longitudinally adjusting a seat 2 according to a third exemplary embodiment in a longitudinal direction x. The device for longitudinally adjusting the seat 2 differs from the previously described exemplary embodiment of the device for longitudinally adjusting the seat 2 essentially only in the structure of the blocking element 98 and the locking element 4 and the upper rail 31. All other components of the device for longitudinally adjusting the seat 2 correspond to each other in terms of structure and function.

The blocking element 98 according to the third exemplary embodiment is additionally fastened to the upper rail 31 in an engaged manner through this rail. The upper rail 31 is formed in particular as a U-shaped profile, which comprises two longitudinal sides 31.1 and 31.2. For example, the blocking element 98 engages through only one of the longitudinal sides 31.1 or 31.2, in particular the longitudinal side 31.1 opposite the opening 34.

The locking element 4 may be formed inclined or arched or uneven in a portion of the side facing the blocking element 98. For example, the locking element 4, as seen in the longitudinal direction x, may be formed with a portion 4.1, 4.2 at its end 4.3, 4.4 that is inclined or arched or uneven, in particular wedge-shaped.

The blocking element 98 may be formed to be relatively inclined or relatively arched or relatively uneven at a portion corresponding to the locking element 4 on a side facing the locking element 4. For example, the blocking element 98 can be formed at its ends 98.3, 98.4 with portions 98.1, 98.2 that are inclined or arched or uneven, in particular wedge-shaped, as seen in the longitudinal direction x. Such a configuration corresponding to each other in the respectively facing sides of the locking element 4 and the blocking element 98 additionally enables a wedging of the locking element 98 and the locking element 4 to be achieved in a simple manner in the event of an undesired mechanical load on the upper rail 31 in the longitudinal direction x, so that the locking element 4 is held firmly in the locking position S1.

The longitudinal sides 31.2 of the upper rail 31 have openings 34 for locking engagement by the locking elements 4. The longitudinal sides 31.2 may be formed as part-forming. For example, the longitudinal sides 31.2 of the upper rail 31 are formed as crowned profiles or are provided in sections with elevations 31.3 and/or depressions 31.4. Thereby, the track distance 12 between the upper track 31 and the lower track 32, in particular the transverse distance in the transverse direction y, can be easily set, in particular enlarged, so that the locking function of the locking element 4 can be improved.

Fig. 10 to 12 schematically show the unlocking sequence of the locking element 4 of the device for longitudinally adjusting the seat 2 according to fig. 9. The unlocking function of the locking element 4 corresponds to the unlocking function of the locking element 4 according to fig. 1 to 8, unless otherwise indicated below.

Fig. 10 shows a locking element 4 of a device for longitudinally adjusting a seat 2 in a locked position S1.

Fig. 11 shows the locking element 4 of the device for longitudinally adjusting the seat 2 in the intermediate position S3.

Fig. 12 shows the locking element 4 of the device for longitudinally adjusting the seat 2 in the unlocked position S2.

Fig. 10 shows the blocking element 98 engaged through the upper track 31. The blocking element 98 has, for example, at least one extension 98.5 protruding in the transverse direction y. At least one extension 98.51 extends through the upper rail 31 and is disposed opposite the free end 98.511 of the lower rail 32. In other words: the blocking element 98 is configured by means of a first extension 98.51 which engages through the upper rail 31 and whose free end 98.511 is arranged opposite the lower rail 32 in the locking position S1, so that undesired forces which can be introduced or which are introduced into the means for longitudinally adjusting the seat 2 in the locking position S1 can be transferred into both the upper rail 31 and the lower rail 32.

At least one second extension 98.52 can be arranged to engage through the upper track 31. This second extension 98.52 serves in particular for fastening and arranging the blocking element 98 on the upper rail 31, in particular on the longitudinal side 31.1 thereof.

In contrast to the blocking element 98 according to fig. 2 to 8 being able to release undesired forces into the upper rail 31, the blocking element 98 according to fig. 9 to 12 is able to additionally transfer these forces to the lower rail 32 via the at least one first extension 98.51 engaging through the upper rail 31 in the event that undesired forces are introduced into the means for longitudinally adjusting the seat 2.

The track distance 12 between the upper track 31 and the lower track 32 in the transverse direction y is greater than in the case of the exemplary embodiment according to fig. 1 to 8.

The profile of the lower track 32 may also be provided with a channel recess 32.1. The channel recess 32.1 extends for example over the entire length of the lower track 32 and may be used for the purpose of, for example, receiving and guiding a wire or cable channel guide (not shown in more detail).

The features disclosed in the above description, in the claims and in the drawings may be essential for the implementation of the invention in its various configurations, both individually and in combination, as long as they remain within the scope of the claims.

List of reference numerals

1. Chair seat

1.1 Backrest for chair

2. Device for longitudinally adjusting a seat

3. Rail pair

31. Upper rail

31.1, 31.2 longitudinal sides

31.3 Height increasing part

31.4 Recess portion

32. Lower rail

32.1 Channel recess

33. Hole(s)

34. An opening

35. Free end

36. Through opening

37. Arm region

38. Upper side of upper rail

381 to 384 recesses

39. The underside of the upper rail

4. Locking element

Section 4.1, 4.2

4.3, 4.4 end portions

41. Protrusions

41.1 First protrusion

41.2 Second projection, in particular last projection

42. Engagement opening

43. Accommodating part

5. Cavity cavity

6. Rolling element

60. Support bolt

61. First rolling element

62. Second rolling element

7. Pretensioning element

71. Bearing area

72. Support area

73. Spring area

8. Fastening bolt

9. Actuating element

91. Actuation area

92. Coupling region

93. Hook-shaped protrusion

94. Control cam

95. Rotary support

96. An axis line

97. Weld joint

98. Barrier element

Section 98.1, 98.2

98.3, 98.4 end portions

98.5 Extension part

98.51 First extension part

98.511 Free end

98.52 Second extension part

99. Stop surface

10. Fastening element

101. Receiving opening

102. Welded connection

11. Reset element

11.1, 11.2 end portions

12. Track distance

BA actuation axis

Arrows P1, P2, P31, P32, P33, P4

S1 locked position

S2 unlocking position

S3 intermediate position

x longitudinal direction, x axial direction

y lateral direction, y axial direction

z vertical direction, z axis direction.

Claims (15)

1. Device for longitudinally adjusting a seat (2), comprising at least:

two pairs of tracks (3) arranged at a distance from each other, and

at least one locking element (4),

wherein the rail pairs (3) are formed by an upper rail (31) and a lower rail (32) which are movable relative to each other, respectively,

wherein the at least one locking element (4) is spring-loaded and is held movably on the upper rail (31) and in a locked position (S1) blocks movement of the upper rail (31) in the lower rail (32) and in an unlocked position (S2) releases movement, and

wherein undesired movement of the locking element (4) out of the locking position (S1) is at least limited or blocked by means of a blocking element (98), and

wherein the blocking element (98) is arranged in a cavity (5) formed between the upper track (31) and the lower track (32).

2. Device for longitudinally adjusting a seat (2) according to claim 1, wherein the blocking element (98) is fastened to the upper track (31).

3. Device for longitudinally adjusting a seat (2) according to claim 1 or 2, wherein the blocking element (98) is fastened to the upper rail (31), engaging through the upper rail (31).

4. Device for longitudinally adjusting a seat (2) according to any of the preceding claims, wherein the blocking element (98) is arranged on an inner wall of the upper track (31) such that an undesired movement of the locking element (4) out of the locking position (S1) is blocked or at least limited such that the locking position (S1) of the locking element (4) is fixed.

5. Device for longitudinally adjusting a seat (2) according to any of the previous claims, wherein the locking element (4) is formed partially inclined or arched or uneven on the side facing the blocking element (98).

6. Device for longitudinally adjusting a seat (2) according to claim 5, wherein the blocking element (98) is formed partly as relatively inclined or relatively arched or relatively uneven on the side facing the locking member (4) corresponding to the locking element (4).

7. Device for longitudinally adjusting a seat (2) according to any of the preceding claims, wherein the upper track (31) has two longitudinal sides (31.1, 31.2), one of which is provided with an opening (34) for locking engagement by the locking element (4), wherein the longitudinal sides (31.1, 31.2) with the opening (34) are partly formed profiled.

8. Device for longitudinally adjusting a seat (2) according to any of the preceding claims, wherein the locking element (4) is arranged and configured such that it is rotatable in the locked position (S1) at least in regions during unlocking and subsequently adjustable, in particular pullable, to the unlocked position (S2).

9. Device for longitudinally adjusting a seat (2) according to any of the preceding claims, wherein the locking element (4) is adjustable from the locked position (S1) to the unlocked position (S2) by means of a combined rotary pulling movement or arcuately movable.

10. Device for longitudinally adjusting a seat (2) according to any of the previous claims, wherein an actuation element (9) is provided, which is arranged in a cavity (5) formed between the upper track (31) and the lower track (32).

11. Device for longitudinally adjusting a seat (2) according to claim 10, wherein the upper rail (31) has a through opening (36) through which the actuation element (9) can be actuated.

12. Device for longitudinally adjusting a seat (2) according to claim 10 or 11, wherein the actuating element (9) is movably arranged, in particular rotatably mounted, on the upper rail (31).

13. Device for longitudinally adjusting a seat (2) according to any one of claims 10 to 12, wherein the actuation element (9) comprises at least one actuation zone (91) and a coupling zone (92).

14. Device for longitudinally adjusting a seat (2) according to claim 13, wherein the actuation zone (91) protrudes at least into the through opening (36) or through the through opening (36), and the coupling zone (92) comprises at least one hook-shaped protrusion (93) and a control cam (94).

15. Seat (1), in particular a vehicle seat, having a device for longitudinally adjusting the seat (2) according to any of the preceding claims.