JP2017505263A - Vehicle seats, especially automobile seats - Google Patents

Abstract

The present invention provides a seat portion (3), a backrest (5) that can pivot about a pivot axis (S) with respect to the seat portion (3), and at least one for adjusting the longitudinal direction of the vehicle seat (1). A pair of seat rails (11, 13) and a seat rail locking device (17) for locking at least one pair of seat rails (11, 13), the backrest (5) for carrying a person Suitable use position (5.1) and easy entry where the backrest (5) is pivoted forward about the pivot axis (S) and the seat rail locking device (17) is released by the Bowden cable unit (80) Position (5.2) can be taken and the backrest (5) must be swung to overcome the limiting force to return from the easy entry position (5.2) to the use position (5.1) Vehicle seat (1 And, more particularly, to a vehicle seat. According to the invention, the limiting force is generated by the compensating spring unit (85) of the Bowden cable unit (80).

Description

  The present invention relates to a vehicle seat, in particular, an automobile seat, a seat portion, a backrest that can pivot about a pivot axis with respect to the seat portion, and at least one seat rail pair for adjusting the vehicle seat in the front-rear direction. And a seat rail locking device for locking at least one pair of seat rails, the backrest being used in a position suitable for carrying a person, and the backrest is pivoted forward about a pivot axis and the seat rail The present invention relates to a vehicle seat in which a locking device can take an easy entry position released by a Bowden cable unit and must overcome a limiting force in order to turn the backrest from the easy entry position toward the use position.

  Vehicle seats having a seat and a backrest that are movable relative to the vehicle structure on the seat rail are known in use. The backrest is pivotable relative to the seat and can take an easy entry position to facilitate access to further vehicle seat rows located behind the vehicle seat. For this purpose, the backrest of the vehicle seat is at least partially swiveled forward and the seat rail is released by the Bowden cable unit. Thereafter, the entire vehicle seat can be slid forward by pushing the backrest. In addition to the easy entry position, the backrest can assume a load floor position, where the backrest is swung forward to a position as horizontal as possible. This backrest position would not be suitable for achieving an easy entry position. This is because the vehicle seat user can best slide the vehicle seat with the backrest only partially turned forward.

  Patent Document 1 is an attachment for a two-door vehicle, and facilitates access to the rear passenger compartment by a backrest that is freely swiveled forward to an easy entry position combined with a vehicle seat that is slid forward. Also disclosed is a fixture that helps to make available different tilted positions of the backrest for use by the occupant. Means are provided for securing the backrest in a freely swiveled position using catches, for example in view of excessive stuffing in the backrest-seat transition area, to prevent undesirably backward swiveling of the backrest. . The catch can be released again by the free turning operation element, for example, when the vehicle seat is slid and returned to the front-rear direction position of the previously taken seat.

  Patent Document 2 is a vehicle seat having a setting fixture for setting the inclination of the backrest of the vehicle seat with respect to the seat portion of the vehicle seat, and the setting fixture freely turns the backrest mainly from at least one use position. A vehicle seat including a free turning unit for freely turning to an easy entry position, i.e., an easy entry position, is disclosed. The fixture also has a fixture lower part connected to the seat and supporting the setting fixture, and a fixture upper part assigned to the free swivel unit and connected to the backrest. In the use position, the free swivel unit is locked by shape fitting using a catch. In the easy entry position, the backrest is fixed by means of a pressure fit by said catch in that the catch fixes the upper part of the fixture by cooperating with a stop on the lower part of the fixture. It is fastened by a press fit with a spring that is fastened to the lower part and acts on the catch in the easy entry position of the backrest. In the easy entry position of the backrest, the catch cooperates with a stop outside the self-locking area so that an open moment is generated in the catch by pulling on the upper edge of the backrest. Starting from a defined limiting force, the result is to overcome the locking force of the spring to the catch, which releases the fixture upper part so that it pivots back to the use position.

  Patent Document 3 discloses a Bowden cable unit having a first cable pull, a second cable pull, and a compensation spring unit. Below the limit force, the first cable pull is firmly connected to the second cable pull via the compensation spring unit. A compensation spring unit connected in series with the first cable pull and the second cable pull so that the distance between the one end of the first cable pull and the one end of the second cable pull is extended when the limit force is exceeded The inner spring is compressed. The compensation spring unit serves as an overload prevention device, for example.

  A Bowden cable unit having a first cable pull, a second cable pull, and a compensation spring unit, wherein the first cable pull is firmly connected to the second cable pull via the compensation spring unit below the limit force. It is used. A compensation spring unit connected in series with the first cable pull and the second cable pull so that the distance between the one end of the first cable pull and the one end of the second cable pull is extended when the limit force is exceeded The inner spring is stretched.

German Patent Application Publication No. 10206303 German Patent Application No. 102009037819 German Patent Application Publication No. 19940813 German Patent Application No. 102009037819 German Utility Model Application Publication No. 202010015143 German Patent Application Publication No. 10201119390 German Patent Application Publication No. 19940813

  The invention is based on the problem of improving the vehicle seat of the type mentioned at the outset, in particular of providing similar functions with fewer components.

  According to the present invention, this object is a vehicle seat, which is a seat, a backrest that can be pivoted about a pivot axis with respect to the seat, and at least one seat for adjusting the vehicle seat in the front-rear direction. A pair of rails and a seat rail locking device for locking at least one pair of seat rails, the backrest being pivoted forward about a pivot axis with a use position suitable for carrying a person And the seat rail locking device can take the easy entry position released by the Bowden cable unit, and it is necessary to overcome the limiting force to turn the backrest back from the easy entry position to the direction of use. Is solved by the vehicle seat produced by the compensating spring unit of the Bowden cable unit.

  Since the spring force that holds the backrest in the easy entry position is generated by the compensation spring unit of the Bowden cable unit, the compensation spring unit has an additional function and a separate spring can be omitted.

  Advantageous configurations that can be used individually or in combination with each other are the subject matter of the dependent claims.

  Preferably, the Bowden cable unit includes a first cable pull, a second cable pull, and a compensation spring unit. Below the limit force, the first cable pull is firmly connected to the second cable pull via the compensation spring unit. When the limit force is exceeded, the length of the spring of the compensation spring unit connected to the first cable pull and the second cable pull is changed. Preferably, the compensation spring unit has a spring arranged between the first cable pull and the second cable pull with respect to the operating connection. The first cable pull, the spring and the second cable pull can be connected in series.

  Depending on the structure of the compensation spring unit, the spring in the compensation spring unit is stretched or compressed when the limiting force is exceeded. The distance between one end of the first cable pull and one end of the second cable pull can be extended when the spring is stretched. This is the case, for example, when the spring is a tension coil spring, the first end of the tension coil spring is connected to the first cable pull and the second end of the tension coil spring is connected to the second cable pull.

  Another preferred compensation spring unit is disclosed in US Pat. The spring in the compensation spring unit is compressed such that the distance between one end of the first cable pull and one end of the second cable pull is extended.

  In a preferred embodiment, in the easy entry position of the backrest, the first means can cooperate with the second means, in particular by a pressure-fit or shape-fit lock, one of the means being assigned to the backrest and the other of the means being seated. The means move relative to each other after being assigned to the part and overcoming the limiting force and while turning the backrest. Preferably, the cable pull end of the first cable pull of the Bowden cable unit is fastened to one of the means, and the cable pull end of the second cable pull is fastened to the seat rail locking device.

  The backrest can be hinged to the seat using two fixtures known per se. The first and second means are preferably arranged precisely on one side of the seat and on the side facing the seat center of the fixture.

  The first means can be embodied as a rocker having a first arm and a second arm. The second means can be a slotted guide. One of the rocker arms can cooperate with a slotted guide. In particular, a contact means attached to one of the arms or a roller attached to one of the arms can cooperate with the slotted guide. In this case, contact is made between the arm or contact means or roller and the slotted guide such that the profile of the slotted guide pivots the rocker during relative movement between the arm and the slotted guide. Such lockers can be manufactured cost-effectively, for example as stamped metal parts.

  Preferably, the Bowden cable unit is fastened to the other side of the arm on one side and to the seat rail locking device on the other side. The cable pull end of the first cable pull of the Bowden cable unit can be fastened to the other of the arms, and the cable pull end of the second cable pull can be fastened to the seat rail locking device.

  Preferably, the rocker is rotatably fastened to the seat, in particular to the fixture lower part of the seat. In this case, the fixture lower part connects the second fixture part of the fixture to the seat. A separate adapter can be omitted between the seat and the rocker. However, an additional adapter for attaching the locker can also be provided.

  Advantageously, the slotted guide is firmly connected to the backrest. In this case, the slotted guide can be integrated into the backrest structure or configured as a separate part. By integrating the slotted guide into the backrest structure, additional components can be omitted. A separately configured slotted guide connected to the backrest structure allows for a modular backrest kit.

  Preferably, the slotted guide has a first slotted guide portion assigned to the use position, and unless the limit force is overcome, the backrest pivots by cooperating with the locker to move from the easy entry position to the use position direction. A guide portion with a second slot for preventing the return to the position. In this case, the second slotted guide part can project beyond the first slotted guide part in the radial direction, preferably in the form of a cam. Preferably, the first slotted guide portion is curved around the pivot axis in the shape of an arc.

  Contact can be made between the arm or contact means or roller and the first slotted guide. However, instead, there is no contact between the first slotted guide and the arm, so that the contact means or roller only cooperates with the second slotted guide and optionally the third slotted guide. The rocker arm can also contact the support means.

  By changing the lever ratio of the rocker, the profile of the slotted guide and / or the characteristic line of the compensating spring unit, the vehicle seat movement sequence can be optimally adapted to the vehicle's specific boundary conditions and customer requirements.

The invention is explained in more detail in the following text by means of advantageous exemplary embodiments shown in the drawings. However, the present invention is not limited to this exemplary embodiment.
A schematic diagram of a vehicle seat is shown. The side view from the outer side of the area | region which surrounds the fixture of a vehicle seat in the state which has a backrest in a use position is shown. The side view from the direction of the seat center of the area | region which surrounds the fixture of a vehicle seat in the state which has a backrest in a use position is shown. FIG. 4 shows a view corresponding to FIG. 3 just before the backrest reaches the easy package position. FIG. 4 shows a view corresponding to FIG. 3 in the easy package position of the backrest. FIG. 3 shows a view corresponding to FIG. 2 in the easy package position of the backrest. Fig. 2 shows a schematic view of a vehicle seat in the easy package position of the backrest. Fig. 6 shows a detailed view of Fig. 5 considering forces. FIG. 9 shows a detailed view from FIG. 8 of the contact area between the rocker and the slotted guide cam.

  The vehicle seat 1 is described in the following sentence in a Cartesian coordinate system defined by three spatial directions perpendicular to each other. In the case of the vehicle seat 1 installed in the vehicle, the front-rear direction x extends generally in the horizontal direction and preferably parallel to the front-rear direction of the vehicle corresponding to the normal traveling direction of the vehicle. The lateral direction extending perpendicularly to the front-rear direction x is likewise oriented horizontally in the vehicle and extends parallel to the vehicle lateral direction. The vertical direction z extends perpendicular to the front-rear direction x and perpendicular to the lateral direction. In the case of the vehicle seat 1 installed in the vehicle, the vertical direction z extends parallel to the vehicle vertical axis.

  Identification of the position and direction to be used, for example, front, rear, top and bottom, is related to the line-of-sight direction of the occupant in the normal seating posture of the vehicle seat 1 oriented in the traveling direction as usual. However, the vehicle seat 1 according to the invention can also be installed in other directions, for example transversely to the direction of travel.

  The vehicle seat 1 includes a seat portion 3 and a backrest 5 that can pivot with respect to the seat portion 3 about the pivot axis S. The pivot axis S extends in the lateral direction and is defined by the two fixtures 7. Yes. The two fixtures 7 are in this case operatively connected to each other via a transmission rod 9 so that the unlocking of one of the two fixtures 7 necessarily results in the unlocking of the other fixture 7. In this case, the rod 9 is likewise oriented laterally and arranged concentrically with the pivot axis S.

  Each of the two fixtures 7 includes a first fixture component 7.1 and a second fixture that is rotatable with respect to the first fixture component 7.1 about the pivot axis S when the fixture 7 is unlocked. Part 7.2. From a structural point of view, the two fixture parts 7.1 and 7.2 (and the clasp ring) together form a disk-like unit. By attaching the fixture 7, the first fixture part 7.1 is firmly connected to the structure of the backrest 5 using the fixture upper part 7.3, that is, fixed to the backrest. The second fixture part 7.2 is firmly connected to the structure of the seat part 3 using the fixture lower part 7.4, that is, fixed to the seat part. The two fixtures 7 are configured as latch fixtures, as is known, for example, from DE 102009041492.

  The vehicle seat 1 is attached to the vehicle structure of the vehicle using two seat rail pairs that are oriented in the front-rear direction x and known per se so as to move back and forth in the front-rear direction x. The two seat rail pairs are movable with respect to the vehicle structure and are arranged in parallel to each other, two first rails 11 fixed to the vehicle structure and engaged around the first rail 11 and And two related second rails 13 for guiding the first rail 11. In any case, each seat rail locking device 17 known per se can be used to lock each first rail 11 with respect to each second rail 13. In a state where the seat rail locking device 17 is unlocked, the first rail 11 can be moved with respect to the second rail 13, and as a result, the position of the vehicle seat 1 with respect to the vehicle structure in the front-rear direction x. Can be changed. In a variant of the exemplary embodiment, the vehicle seat 1 has only exactly one seat rail locking device 17 that acts specifically between one of the two seat rail pairs.

  The backrest 5 of the vehicle seat 1 is inclined backwards with respect to the vertical direction z and is suitable for carrying a person (shown in FIG. 1) 5.1 from the use position 5.1, the backrest 5 of the seat 3 It can be moved to both the load floor position 5.3 and the easy entry position 5.2 that are swung forward about the swivel axis S. At the easy entry position 5.2, the backrest 5 is swung forward about the swivel axis S to the position swung forward with respect to the vertical direction z, but not to the load floor position 5.3. When the easy entry position 5.2 is reached, the seat rail locking device 17 is unlocked and the vehicle seat 1 can be slid forward. As a result, as large an entrance / exit area as possible for the seats in the rear seat row, not shown in the figures, in particular the third seat row, arranged behind the vehicle seat 1 can be made available.

  In the loading position 5.3, the backrest 5 is pivoted further forward with respect to the easy entry position 5.2 and preferably rests on the seat 3.

  For the unlocking of the seat rail locking device 17 independent of the easy entry position 5.2 of the backrest 5 and thus for the setability of the vehicle seat 1 in the longitudinal direction x, the seat 3 in the front region of the vehicle seat 1 A swivelable bar 15 is provided, the end of which is operatively connected to the seat rail locking device 17 in a manner known per se. The bar 15 allows the seat rail pair 11, 13 to be unlocked manually by pulling up the bar 15. The vehicle seat 1 can slide in the front-rear direction x within a predetermined range as long as the bar 15 is pulled up and as a result the seat rail locking device 17 remains disengaged. In this case, the bar 15 is attached to a reinforcing transmission rod, and the reinforcing transmission rod is rotated when the bar 15 is pulled up. The transmission rod can be attached to each first rail 11 on both sides of the seat, and connects the locked states of the two seat rail locking devices 17 of the two seat rail pairs 11 and 13 to each other.

  The operating element 20 is operably connected to the transmission rod 9 on the outside of the seat so that the operation of the operating element 20 rotates directly after the operation or experiences a small play. As a result, the two fixtures 7 are released, and the backrest 5 can pivot with respect to the seat portion 3 about the pivot axis S. The first spring 22 biases the operating element 20 in the direction of the starting position where the two fixtures 7 are locked, opposite to the operating direction.

  In the upper region of the backrest 5 there is a second operating element (not shown in FIG. 1) for unlocking the fixture 7, in particular for pivoting the backrest 5 forward to the easy entry position 5.2. In addition, the second operating element is connected to the operating element 20 at least indirectly.

  In this case, it is possible to set the accuracy of the inclination angle of the backrest around the pivot axis S within the small comfortable angle range around the use position 5.1 (for example, up to 10 ° backward and 2 ° forward). A comfort setting of 5 is also possible. However, the comfort setting of the backrest 5 can be omitted.

  The catch 30 is attached to the fixture lower part 7.4 so as to be rotatable around the catch rotation shaft 40 outside at least one of the seats. The catch rotary shaft 40 is eccentric with respect to the pivot axis S of the backrest 5, and in this case, is arranged in a region located behind and above the pivot axis S of the fixture lower part 7.4. The catch rotation shaft 40 is in this case a central axis of the first bearing bolt 40 which is riveted to the fixture lower part 7.4 or screwed into the fixture lower part 7.4 in a manner known per se. Are the same.

  The catch 30 is arranged between the fixture lower part 7.4 and the operating element 20 in the lateral direction.

  The catch 30 is V-shaped having a first leg 31 and a second leg 32 that include an angle of about 50 ° between each other. However, the present invention is not limited to this angle.

  In the region where the first leg portion 31 and the second leg portion 32 meet, an opening is provided for receiving the first bearing bolt 40 and thus for rotatably mounting the catch 30.

  The second spring 42 urges the catch 30 counterclockwise in FIGS. 2 and 6 against the stop 50 fastened to the fixture upper part 7.3. In this case, the stopper 50 is configured as a sheet metal angle member that engages the outside of the fixture lower part 7.4.

  The first leg 31 of the catch 30 has a basic contour curved around the turning axis S on the side facing away from the second leg 32, and a detent 35 is provided in the direction toward the catch turning axis 40. Has a notch to be formed. The detent 35 serves to cooperate with the stop 50 at the easy entry position 5.2 of the backrest 5. In the direction of the catch rotation axis 40, the curved outer basic contour of the first leg 31 is delimited by a pair of stops 38 projecting radially outwardly against which the stops 50 abut at the rearmost position of the backrest 5. ing. The rearmost position of the backrest 5 corresponds to the use position 5.1 in the embodiment of the fixture 7 without a comfortable angle range.

  On the side facing the seat center of the fixture lower part 7.4, the rocker 60 is attached to the fixture lower part 7.4 so as to be rotatable on the rocker rotation shaft 66 as seen in the lateral direction. Yes. The rocker rotation shaft 66 is eccentric with respect to the pivot axis S of the backrest 5, and in this case, is disposed in a region located below the pivot axis S of the fixture lower part 7.4. The rocker rotary shaft 66 is in this case a central axis of the second bearing bolt 66 that is riveted to the fixture lower part 7.4 or screwed into the fixture lower part 7.4 in a manner known per se. Are the same.

  The rocker 60 is V-shaped having a first arm 61 and a second arm 62 that include an angle of about 135 ° between each other. However, the present invention is not limited to this angle.

  In the region where the first arm 61 and the second arm 62 meet, an opening is provided for receiving the second bearing bolt 66 and thus for rotatably mounting the rocker 60.

  The first arm 61 has a hole for hooking the Bowden cable fixing means 68, in this case, the first cable pull 81 of the Bowden cable unit 80, at an end portion away from the rocker rotation shaft 66. The second arm 62 has a roller 65 at its end remote from the rocker rotation shaft 66, the roller 65 being rotatably attached to the second arm 62 and a slotted guide fastened to the fixture upper part 7.3. In cooperation with 70, it functions as a contact means. The contact means does not need to be configured as the roller 65, and can be a cam formed from the second arm 62, for example.

  The slotted guide 70 has a basic shape in the form of a ring segment that extends around the pivot axis S in a curvilinear manner. The slotted guide 70 is in this case a pressed sheet metal part that is fixed, in particular welded, to the fixture upper part 7.3, but in a variant of the exemplary embodiment, from the fixture upper part 7.3 It can also be manufactured integrally.

  The slotted guide 70 has a radially outwardly facing outer contour that functions as a control contour and cooperates with the roller 65 of the rocker 60. The first slotted guide portion 71 is located on the opposite side of the roller 65 at the use position 5.1 of the backrest 5. A second slotted guide portion that protrudes radially outward from the first slotted guide portion 71 is configured as a cam 72 and is used to move the backrest 5 from the use position 5.1 to the easy entry position 5.2. The roller 65 is pressed in the radial direction that comes into contact with the rotary shaft S and moves away from the turning axis S. As a result, the rocker 60 is rotated (clockwise in FIGS. 3 and 4). The cam contour of the cam 72 is slightly spirally curved around the pivot axis S so that the distance between the cam 72 and the pivot axis S increases in a direction away from the first slotted guide portion 71. The cam 72 is adjacent to the first slotted guide portion 71 in the circumferential direction.

  The guide part 73 with the third slot is arranged on the side away from the guide part 71 with the first slot of the cam 72 in the circumferential direction. The third slotted guide portion 73 is located further inward in the radial direction with respect to the cam contour of the cam 72 and further outward in the radial direction with respect to the first slotted guide portion 71. The third slotted guide portion 73 is located on the opposite side of the roller 65 when the backrest 5 is moved from the easy entry position 5.2 to the load floor position 5.3.

  If necessary, a support body 7.5 can be provided, in which case the support body 7.5 is pressed from the lower part 7.4 of the fixture in the direction of the rocker 60 and the use position of the backrest 5. 1 abuts the outer contour of the first arm 61 facing away from the second arm 62. This avoids the situation in which the roller 65 abuts against the slotted guide 70 at the use position 5.1 of the backrest 5 and, if necessary, at the comfortable position.

  The Bowden cable unit 80 moves the rocker 60 to the two seat rail locking devices 17 so that the pivoting of the rocker 60 (clockwise in FIGS. 3, 4, 5, 7, 8, and 9) releases the seat rail locking device 17. Connect directly or indirectly.

  The Bowden cable unit 80 includes a first cable pull 81 and a second cable pull (not shown). The first cable pull 81 is fastened to the cable pull fastener 68 of the locker 60, and is hooked in detail. The second cable pull is directly or indirectly connected to the two seat rail locking devices 17.

  The first cable pull 81 and the second cable pull are connected to each other using a compensation spring unit 85. The compensation spring unit 85 firmly connects the first cable pull 81 and the second cable pull to each other below the limit force. Compensation connected in series with the first cable pull 81 and the second cable pull so that the distance between one end of the first cable pull 81 and one end of the second cable pull is extended when the limit force is exceeded. The spring in the spring unit 85 is extended. In a variation of the exemplary embodiment, as described in U.S. Patent No. 6,053,075, the spring is compressed when the limiting force is exceeded, resulting in a distance between one end of the first cable 81 and one end of the second cable pull. The first cable pull 81 and the second cable pull are connected in series with the spring so that is stretched.

  2 and 3 show a part of the vehicle seat 1 in the use position 5.1 of the backrest 5. The catch 30 is held at the starting angular position by the stopper 50. The rocker 60 is in contact with the support means 7.5 so that there is a small gap between the roller 65 and the first slotted guide portion 71.

  In FIG. 4, the fixture 7 is in an unlocked state (by actuation of the operating lever 20 not shown in FIG. 4) and the backrest 5 is swung forward in the direction of the easy entry position 5.2. Easy entry position 5.2 has not been reached. As soon as the roller 65 contacts the cam 72 of the slotted guide 70, the rocker 60 is deflected about the rocker rotation axis 66. As a result, the seat rail locking device 17 is unlocked by the Bowden cable unit 80. Upon further pivoting of the backrest 5 in the direction of the easy entry position 5.2, the rocker 60 is further deflected due to the cam profile of the cam 72 that is helically curved about the pivot axis S. Since the seat rail locking device 17 is already fully released and at the end stop, further movement is absorbed by the compensation spring unit 85.

  The force required to unlock the seat rail locking device 17 is smaller than the limiting force of the compensation spring unit 85. This ensures that the seat rail locking device 17 is unlocked before the compensating spring unit 85 is activated and causes the Bowden cable unit 80 to stretch.

  5 and 6 show a part of the vehicle seat 1 at the easy entry position 5.2 of the backrest 5, ie after reaching the easy entry position 5.2. The roller 65 is now in contact with the cam 72 just behind the cam 72 as seen in the circumferential direction. Since the second spring 42 has rotated the catch 30 so that the stopper 50 abuts against the detent 35, the backrest 5 cannot be swung further forward in the direction of the load floor position 5.3. The compensation spring unit 85 is relaxed. In a variant of the exemplary embodiment, the compensation spring unit 85 remains slightly pretensioned in this region (the roller 65 bears against the second slotted guide 72). The seat rail locking device 17 is unlocked. The vehicle seat 1 can be slid forward from the start position to the easy entry position using the rails 11 and 13 to increase the entry space to the rear seat row.

  The cam 72 that contacts the roller 65 outside the self-locking area prevents the backrest 5 from turning back in the direction of the use position 5.1. In order to swivel the backrest 5 back, it is necessary to apply a return swiveling force F3 to the upper region of the backrest 5, and this force is at least that of the compensation spring unit 85 so that the spring in the compensation spring unit 85 is stretched. It must be large enough to overcome the limit. The compensation spring unit 85 thus cooperates with the cam 72 to generate a forward limiting torque about the pivot axis S so that the backrest 5 can be pivoted back to the use position 5.1 again. To do this, you need to overcome this.

  By changing the contour of the cam 72, the return turning force F3 can be adjusted as desired. The return turning force F3 can also be influenced by changing the lever transmission and lever ratio of the rocker 60 and the catch 30.

  In order to pivot the backrest 5 from the easy entry position 5.2 in the direction of the load floor position 5.3, the operating element 20 must be actuated again (counterclockwise in FIGS. 2 and 6). In this process, the operating element 20 comes into contact with the second leg 32 of the catch 30 so that the stopper 50 can pivot beyond the detent 35 of the catch 30 (clockwise in FIGS. 2 and 6). ) The catch 30 is turned. The seat rail locking device 17 remains released even at the load floor position 5.3 due to the contact between the roller 65 and the third slotted guide portion 73. However, the contour of the third slotted guide 73 can be changed so that the seat rail locking device 17 is unlocked again at the load floor position 5.3 of the backrest 5 (at the load floor position 5.3). Engagement function). In a variant of the exemplary embodiment, a slight pretension by the compensating spring unit 85 provides a force by the roller 65 of the third slotted guide 73. This force functions as damping during the pivoting motion of the backrest 5.

  When the vehicle seat 1 is slid to return from the front easy entry position to the start position, the rail moving force necessary for this is oriented in the front-rear direction x of the return turning force F3 applied to the backrest 5 by the user of the vehicle seat 1. Less than force component. As a result, the vehicle seat 1 is first moved to the start position in the front-rear direction x and thus to the end stop, after which the roller 65 can overcome the cam 72, and as a result, the backrest 5 is turned to use position 5.1. It is guaranteed that it can be returned to.

  8 and 9 schematically and simply show the force ratio of the vehicle seat 1 immediately before the backrest 5 is turned and returned from the easy entry position 5.2 to the use position 5.1.

  The compensating spring unit 85 generates a first force F1 at a point of the Bowden cable fastener 68 that is at a first distance L1 from the rocker rotation axis 66. The first force F1 is substantially perpendicular to the line connecting the pivot axis S and the Bowden cable fastener 68. Due to the different lengths of the first arm 61 and the second arm 62 and the resulting lever ratio, the second arm 62 has a substantially radial second force F2 against the third slotted guide 73, The roller 65 arranged at the second distance L2 from the turning axis S is pushed. In this case, the following matters. F2 = F1 * L1 / L2. The point of contact between the roller 65 and the slotted guide 70 moves from the third slotted guide 73 to the cam 72 as F2 is increased so that L2 and thus F2 changes continuously.

  The return turning force F3 is started by the user in the upper region of the backrest 5 as a third force. The third distance L3 is determined as the distance between the turning axis S and the starting point of the return turning force F3. A fourth distance L4 is defined as the distance between the turning axis S, the contact point between the roller 65 and the cam 72.

  Due to the lever ratio present around the pivot axis S, the return pivot force F3 is the fourth force F4 at the contact point between the roller 65 and the cam 72 located at the fourth distance L4 from the pivot axis S. Produce. The following are relevant: F4 = F3 * L3 / L4.

  The fourth force F4 causes a torque to the rocker 60 about the rocker rotation shaft 66 by the cam 72, and the torque counteracts the torque to the rocker 60 generated by the first force F1. The force component acting opposite to the second force F2 of the fourth force F4 is greater than the second force F2 around the rocker rotation shaft 66 so that the roller 65 can move beyond the cam 72. A large torque can be generated. This force component of the fourth force F4 is determined by the contour of the cam. The sharper the contour, the smaller the force component acting in the direction opposite to F2 of the fourth force F4.

  The features disclosed in the above specification, claims and drawings may be important both individually and in combination in order to implement the invention in various forms.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 3 Seat part 5 Backrest 5.1 (Backrest use position) 5.2 (Backrest) Easy entry position 5.3 (Backrest) load floor position 7 Fixture 7.1 First fixture parts 2 Second fixture part 7.3 Fixture upper part 7.4 Fixture lower part 7.5 Support means 9 Transmission rod 11 First rail 13 (for seat rail pair) Second rail 15 (for seat rail pair) Bar 17 Seat rail locking device 20 Operating element 22 First spring 30 Catch 31 First leg 32 Second leg 35 Movement stop 38 Pair of stops 40 Catch rotating shaft, first bearing bolt 42 Second spring 50 Stopper 60 First means, rocker 61 First arm 62 Second arm 65 Contact means, roller 66 Rocker rotation shaft, second bearing bolt 68 Bowden cable fixing means 70 Second means, with slot Guide 71 Guide portion with first slot 72 Guide portion with second slot, cam 73 Guide portion with third slot 80 Bowden cable unit 81 First cable pull 85 Compensation spring unit F1 First force F2 Second force F3 Third Force, return turning force F4 fourth force L1 first distance L2 second distance L3 third distance L4 fourth distance x longitudinal direction z vertical direction S turning axis

Claims (15)

A vehicle seat (1), in particular an automobile seat, comprising a seat (3), a backrest (5) pivotable about a pivot axis (S) relative to the seat (3), and the vehicle seat ( 1) at least one seat rail pair (11, 13) for adjusting the front and rear direction and a seat rail locking device (17) for locking the at least one seat rail pair (11, 13). And
The backrest (5) has a use position (5.1) suitable for carrying a person, the backrest (5) is swung forward about the swivel axis (S), and the seat rail locking device ( 17) can take the easy entry position (5.2) released by the Bowden cable unit (80), and the backrest (5) is swung to move from the easy entry position (5.2) to the use position. In order to return to the direction of (5.1), it is necessary to overcome the limiting force,
Vehicle seat (1), characterized in that the limiting force is generated by a compensation spring unit (85) of the Bowden cable unit (80).   In the easy entry position (5.2), the first means (60) cooperates with the second means (70) by locking, one of the means (60, 70) being assigned to the backrest (5) and The other of the means (60, 70) is assigned to the seat (3), and the means (60, 70) are mutually connected after overcoming the limiting force and while turning the backrest (5). 2. Vehicle seat (1) according to claim 1, characterized in that it moves with respect to it.   The first means is embodied as a rocker (60) having a first arm (61) and a second arm (62), the second means is a slotted guide (70), and the arms (61, 62). 3) A vehicle seat (1) according to claim 2, characterized in that one of the two) cooperates with the slotted guide (70).   4. Vehicle seat (1) according to claim 3, characterized in that contact means attached to one of the arms (61, 62) cooperate with the slotted guide (70).   The vehicle seat (1) according to claim 3, characterized in that a roller (65) attached to one of the arms (61, 62) cooperates with the slotted guide (70).   6. The Bowden cable unit (80), wherein one side is fastened to the other of the arms (61, 62) and the other side is fastened to the seat rail locking device (17). Vehicle seat (1) given in any 1 paragraph of above.   4. The rocker (60) is rotatably fastened to the seat (3), in particular to a fixture lower part (7.4) of the seat (3). Vehicle seat (1) given in any 1 paragraph of Claims 6.   The vehicle seat (1) according to any one of claims 3 to 7, characterized in that the slotted guide (70) is firmly connected to the backrest (5).   The slotted guide (70) cooperates with the first slotted guide portion (71) assigned to the use position (5.1) and the locker (60) as long as the limiting force is not overcome. The backrest (5) has a second slotted guide portion (72) for preventing the backrest (5) from turning and returning from the easy entry position (5.2) to the use position (5.1). A vehicle seat (1) according to any one of claims 3 to 8, characterized in that it is characteristic.   The vehicle seat (1) according to claim 9, characterized in that the second slotted guide part (72) protrudes beyond the first slotted guide part (71) in the radial direction.   11. A vehicle seat (1) according to claim 9 or 10, characterized in that the first slotted guide part (71) extends in the form of an arc around the pivot axis (S).   The Bowden cable unit (80) includes the compensation spring unit (85), a first cable pull (81), and a second cable pull, the compensation spring unit (85) having the first connection with respect to the operating connection. The vehicle seat (1) according to any one of the preceding claims, characterized in that it has a spring arranged between a cable pull (81) and the second cable pull.   The vehicle seat (1) according to claim 12, characterized in that the first cable pull (81), the spring and the second cable pull are connected in series.   When the limiting force is exceeded, the spring in the compensation spring unit is stretched so that the distance between one end of the first cable pull (81) and one end of the second cable pull is extended. Vehicle seat (1) according to claim 12 or 13, characterized in that   When the limiting force is exceeded, the spring in the compensation spring unit is compressed so that the distance between one end of the first cable pull (81) and one end of the second cable pull is extended. Vehicle seat (1) according to claim 12 or 13, characterized in that

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