CN101336174A - Accessories for vehicle seats - Google Patents

Abstract

In the case of a fitting (205) for a vehicle seat, in particular for a motor vehicle seat, with a first fitting part (209) fixed on the seat part, a second fitting part (211) which is rotatable relative to the first fitting part (209) and is intended for adjusting the inclination of the backrest (202) of the vehicle seat (201) between a plurality of use positions, a third fitting part (124) which is fixed on the backrest, is lockable with the second fitting part (211) and, for central free-pivoting of the backrest (202), is pivotable relative to the second fitting part (211) about an axis (A) and is securable in the freely pivoted position of the backrest (202), and at least one latch (220) for locking and/or securing, the same latch (220) is used to lock the third fitting part (214) in the use positions of the backrest (202) and to secure it in the freely pivoted position of the backrest (202).

Description

Accessories for vehicle seats

technical field

The invention relates to an accessory for a vehicle seat, in particular for a motor vehicle seat, having the features of the preamble of claim 1 .

Background technique

DE 10 206 303 A1 discloses an accessory of this type for a two-door motor vehicle for allowing the use of the rear seat by means of a free forward pivoting of the backrest and for realizing the various available backrest inclination settings for the seated occupant. Certainly. For the backrest to pivot freely, the fitting is unlocked due to the pivoting of the unlocking pin in the slot connection, while contamination of the unlocking mechanism is avoided by covering this slot connection. In order to prevent an undesired reverse pivoting of the backrest, for example in the case of excessive upholstery in the transition region between the backrest and the seat part, a backrest fastening is provided at the free pivoting position.

Contents of the invention

The object on which the invention is based is to improve an accessory of the type mentioned above. This object is achieved according to the invention by an accessory having the features of claim 1 . Advantageous developments are the subject-matter of the subclaims.

Since the same pawl locks the third fitting part both in the use position of the backrest and in the freely pivoting position of the backrest, both the number of components and the required construction space are reduced compared to known fittings . In order to achieve a fixation in a freely pivotable position independently of the set backrest inclination, preferably separate components are provided for cooperating with the pawl, in particular a fixing ring and a latch element, the fixing ring being preferably mounted on the second fitting part and held by the first fitting part, or being tensioned against the first fitting part, the latch element is fixedly connected to the second fitting part, however, in order to cooperate directly with the pawl, these members are respectively in their respective planes or common There are protrusions, steps, etc. in the plane. Where configured in each plane, preferably for each of the two planes, the pawl has a specific area for cooperation, such as a tooth or a finger.

In order to lock the third fitting part in the use position, the pawl preferably bears with prestress against a latch stop of the latch element. The pawl is preferably pivotally mounted on the third fitting part via a bearing bolt designed as an eccentric bolt. The support pegs may preferably be positioned and secured to ensure maximum pawl engagement.

In order to fix the third fitting part in the freely pivoting position, the detent preferably engages behind the fixing protrusion of the fixing ring during cooperation with the fixing ring, and for cooperating with the fixing ring, the detent which hangs behind the fixing protrusion preferably radially Inwardly, and when uncooperated, preferably radially outwardly.

A pivotable pin, a rotatable switching ring or a rotatable unlocking shaft can lift the pawl or its fixing element again. Due to the provision of the unlocking shaft, the rotation of which about its own axis unlocks the pawl, a relatively dust-free space is provided in a simple manner in the fitting. This solution dispenses with a cover, which is required, for example, in the case of a pivotable pin for a given slot connection. The pawl can be lifted directly via the unlocking shaft. However, preferably, in order to eliminate play of the pawl, tensioning elements are provided as fastening elements, which reinforce the load-bearing capacity in the event of a crash, and specific grips are preferably provided as further fastening elements in order to Support pawls. The unlocking shaft then pivots at least one of these two elements away from the pawl. The other element is preferably connected for tensioning with free-running travel, so that it is finally also pivoted away from the pawl by the rotating unlocking shaft, so that the pawl is unlocked.

In order to enhance the load absorption in the event of a crash, additionally or alternatively special grip pawls can be provided for the support on the latch element. A gripping pawl is mounted pivotably on the third fitting part, for example via a support pin, which in the event of a collision preferably bears against a stop of the latch element, while the stop is not exerted on the gripping pawl. Turn on torque. The pawl for locking and securing the third fitting part can then be pivotally mounted on the grip pawl or the support pin of the grip pawl. Preferably, the common spring prestresses both the grip pawl and the pawl for locking and securing the third fitting part in the closing direction. The pawl and grip pawl for locking and securing the third fitting part are preferably connected by a mortise-and-tongue guide.

The switch ring is rotatable relative to the fixed ring. During the relative rotation of the fixed ring and the switch ring, the switch ring releases the cooperation of the pawl and the fixed ring. The fixing of the backrest by the fitting can be terminated automatically, so that the backrest can be pivoted back to its original position. Preferably, the relative rotation of the fastening ring and the switching ring lifts the pawl, which preferably hangs down in the radial direction, for which purpose the switching ring preferably has a switching cam with a radially extending collar. Proper configuration and prestressing of the components ensures vibration-free bearing contact of the components. There are preferably various possibilities for actuating the pawl, the fixing ring and/or the switching ring.

Preferably, the pawl turns the switching ring through a small angle before engaging behind the fixing protrusion, and when the pawl engages behind the fixing protrusion, the switching ring reverses rotation due to the prestress. Preferably, the fixed ring or switching ring is held with play relative to the first fitting part by means of blocking stops projecting axially relative to the first fitting part, wherein in particular two blocking fingers projecting radially from the held ring The shaped portions receive blocking stops therebetween. The unretained ring of the two rings is preferably prestressed in the direction towards the blocking stop.

The ring, which is prestressed towards the blocking stop, is acted upon by a pivotally mounted blocking lever which bears against a stop projection of the ring in addition to being self-locking. Preferably, the pivotally mounted and prestressed tensioning lever acts on the blocking lever, the tensioning profile of one lever bearing against the blocking pin of the other lever, without the blocking lever exerting an opening moment on the tensioning lever .

The invention can preferably be used on a longitudinally adjustable vehicle seat of a two-door motor vehicle with a centrally free pivoting backrest, but it can also be used on other vehicle seats. When using the accessory according to the invention in order to actuate the known "easy-entry function", the backrest can also be pivoted in the opposite direction just when the preset longitudinal position of the seat is reached, during the use of the accessory , in addition to the free pivoting of the backrest, the vehicle seat also moves.

Description of drawings

The invention is explained in more detail below by means of exemplary embodiments with variants and shown in the accompanying drawings, in which:

Figure 1 shows an exploded view of the first exemplary embodiment without the guy cables, where the rightmost shown component is shown in another perspective view,

Figure 2 shows a schematic side view of a vehicle seat,

Figure 3 shows a view of the part of the first exemplary embodiment in the use position of the backrest which is relevant to the free pivoting,

Figure 4 shows a cross-sectional view taken along line IV-IV of Figure 3,

Figure 5 shows a cross-sectional view taken along the line V-V of Figure 3,

Figure 6 shows a partial view without the tension member in Figure 3,

Figure 7 shows a view corresponding to Figure 3 in a freely pivoted position of the backrest,

Figure 8 shows a view of the rear side of the pawl,

Figure 9 shows a partial perspective view of the first exemplary embodiment in a free pivoting position of the backrest, seen from the rear side of the pawl,

Figure 10 shows a modification of the grip,

Figure 11 shows a modification of the first exemplary embodiment,

Figure 12 shows a supplement to the first exemplary embodiment,

Figure 13 shows an exploded view of a second exemplary embodiment,

Figure 14 shows a sectional view through the second exemplary embodiment in a position of use in a plane perpendicular to the axis,

Figure 15 shows a representation corresponding to Figure 14 in a freely pivoted position,

FIG. 16 shows a view corresponding to FIG. 14 during unlocking by the longitudinal adjuster,

Figure 17 shows a sectional view through the second exemplary embodiment in a position of use in a plane along the axis,

Figure 18 shows an exploded view of a third exemplary embodiment,

Figure 19 shows a sectional view through the third exemplary embodiment in a position of use in a plane perpendicular to the axis,

Figure 20 shows a view corresponding to Figure 19 in a freely pivoted position,

FIG. 21 shows a view corresponding to FIG. 19 during unlocking by the longitudinal adjuster,

Figure 22 shows a sectional view through the third exemplary embodiment in a position of use in a plane along the axis,

Figure 23 shows a schematic side view of a vehicle seat.

Detailed ways

The respective exemplary embodiments and modifications are consistent with each other unless otherwise described. In a first exemplary embodiment, a vehicle seat 201 for a two-door motor vehicle has fittings 205 on both sides thereof for setting the inclination and for freely pivoting relative to the seat part 203 of the vehicle seat The backrest 202 of the vehicle seat. The hand wheel 207 and the shaft connected to the hand wheel 207 between the two accessories 205 are arranged on one of the accessories 205 and outside the vehicle seat 201 for the function of setting the inclination, and the hand lever 208 can It is movably mounted on the backrest 202 for a free pivoting function.

Each fitting 205 comprises as its core a first fitting part 209 and a second fitting part 211, which structurally together form a disc-shaped unit, as described, for example, in DE10105282B4, the disclosure of which patent application expressly incorporated here. In the exemplary embodiment, the two fitting parts 209 and 211 are geared to each other in the shown case by means of a self-locking eccentric planetary gear which in this case allows a play-free movement of the fitting parts 209 and 211 and for adjustment, a superimposed rocking motion also causes relative rotation of the fitting parts 209 and 211. Such a gear fitting is described, for example, in DE 4436101 A1, the disclosure content of which is expressly incorporated here. However, other gear fittings could be used, theoretically even pin fittings.

The first fitting part 209 is connected (fixedly relative to the seat part) to the structure of the seat part 203 , wherein an adapter 213 fixedly mounted relative to the seat part is fastened to the first fitting part 209 . Each fitting 205 further includes a third fitting portion 214 which is connected (“fixedly relative to the backrest”) to the backrest structure of the backrest 202 . A disc-shaped third fitting part 214 is mounted on the second fitting part 211 on the side facing away from the first fitting part 209, and for free pivoting about the center relative to the second fitting part 211, the third fitting part 214 can Axis A pivots but otherwise interlocks with the second fitting part 211 . The axis A and its position in the vehicle seat 201 define the directional sign used in this case. The conditions for a use position of the backrest 202 suitable for seated use ( FIG. 3 ) are first described below, in which case the gear fittings used define a number of possible use positions.

An annular latch element 215 on the second fitting part 211 serves to mount the third fitting part 214 . The latch element 215 is fixedly connected to the second fitting part 211 by laser welding (or otherwise). An annular fastening disk 217 engages on the third fitting part 214 in the bearing region and, for axial fastening of the third fitting part 214 , is fixedly connected to the second fitting part 211 and to the latch element 215 . In order to interlock the third fitting part 214 in the use position, the latch element 215 has an integrally formed first latch stop 219 .

The pawl 220 is pivotably mounted on the third fitting part 214 on the side facing the second fitting part 211 via a support peg 224 . The support peg 224 simultaneously serves as a stop cooperating with the first latch stop 219, that is to say, in the use position, the support peg 224 limits the rearward pivotal movement of the third fitting part 214, particularly in the normal position and (rear Part) The collision position is the same. In order to lock and limit the forward pivoting movement of the third fitting part 214 in the (front) crash position, a second latch stop 225 is arranged on the latch element 215 in the radial extension of the pawl 220 . The supporting bolt 224 is designed as an eccentric bolt, that is to say, the supporting bolt 224 is mounted in the third fitting part 214 and can be offset relative to the third fitting part 214 about the pivot axis relative to the pawl 220 Axis rotation. In order to compensate for manufacturing tolerances and for maximum pawl engagement, the support pin 224 is arranged and fixed so that the pawl 220 abuts against the second latch stop 225 with the locking region 220a without play, but outside the self-locking angular range . The tangent of such a bearing angle can be, for example, 0.25.

In the third fitting part 214, an unlocking shaft 227 is rotatably mounted parallel to the support pin 224 via a bearing bush 226, on which a grip 229 is pivotally in place and fixed in rotation. There is tension member 231 in place. In the modified version, on the unlocking shaft 227 , a grip 229 is in place fixed in rotation, and a tensioning member 231 is in pivotally in place. The grip member 229 and tension member 231 are pivotable about a common axis defined by the unlocking shaft 227 and align with the pawl 220 as the third fitting part 214 is locked. The function of the grip 229 and tension 231 is described in DE4439644A1, the disclosure of which is expressly incorporated here.

The tension member 231 has a tension surface that is bent eccentrically with respect to the unlocking shaft 227 and abuts against the bearing surface 220b of the pawl 220 at an angle outside the self-locking range. The tangent of the support angle can be, for example, 0.11. The tensioning element 231 is acted on by a tensioning spring 236 which is designed as a helical tensioning spring, so that the tensioning element 231 bears against the pawl 220 with a prestress. As a result, the third fitting part 214 is interlocked without play with the latch element 215 and then with the second fitting part 211 .

The grip 229 is acted upon by a helical spring 237 and bears against a stop of the third fitting part 214 . That is, typically, for normal seating in the use position, the pawl 220 is held in place by the tension member 231 and the grip 229 is positioned a short distance from the pawl 220 ( FIG. 6 ). In case of a collision, when the force of the collision acts on the pawl 220, the tension member 231 can be opened due to the absence of self-locking. After a slight pivotal movement of the pawl 220 , the pawl 220 rests against the grip 229 , preferably using the bearing surface 220b. The grip 229 then preferably supports the pawl 220 tangentially or concentrically and over as large an area as possible, which bears against the grip 229 in the self-locking range. This prevents pawl 220 from opening. The tangent of the bearing angle is preferably zero. FIG. 10 illustrates a modification of a grip 229 that cooperates with a stop of the third fitting part 214 that is offset relative to the unlocking shaft 227 and that has a radially protruding material portion for this purpose.

Gripping part 229 and tensioning part 231 are connected to one another for tensioning with free play by means of mortise and tongue guide 232 . For this purpose, the tensioning piece 231 has a slot which is bent around the unlocking shaft 227 and into which the tongue of the gripping piece 229 engages. A cover 238 secured to the third fitting part 214 covers the pawl 220 as well as the support peg 224, the grip 229, the tension member 231, and the springs 236 and 237 and protects these components from dirt.

On the side of the third fitting part 214 facing away from the second fitting part 211 , the unlocking shaft 227 has an arm or lever fixedly connected to it in rotation, which is fixed with a first pull operably connected to the hand lever 208 . Cable 242. Alternatively, the unlocking shaft 227 can also be actuated by an electric transmission, for example by a servo motor or the like.

By unlocking the third fitting part 214 and pivoting the backrest 202 forward, the backrest 202 is changed from the use position to the freely pivoting position. To unlock the third fitting part 214 , the unlocking shaft 227 is rotated about its own axis by the first cable 242 . The unlocking shaft 227 acts on and opens an element fixedly connected to it in terms of rotation, in this case the tensioning element 231 , that is to say separates and/or removes this element from the pawl 220 . Simultaneously, the corresponding element (in this case the tensioning piece 231 ) acts on the other element (in this case the grip 229 ) via the mortise-and-tongue guide 232 in order to release the pawl 220. The pivoting grip 229 bears against the substantially radially protruding unlocking finger 220c of the pawl 220 and thereby pulls up the finger 220c. The pawl 220 is then fully opened.

On at least one side of the vehicle seat (or on both sides of the vehicle seat), the fitting 205 is designed so that the fixing ring 245 is coaxial with the axis A and is rotatably mounted on the third fitting part 214 (or alternatively, the latch element 215 Or the step of the second fitting part 211), and arranged between the latch element 215 and the third fitting part 214 in the axial direction. The fixing ring 245 has a fixing protrusion 247 provided to protrude radially outward. A fixing ring 245 is provided together with a fixing protrusion 247 for fixing the third fitting part 214 in a freely pivotable position of the backrest 202 , for which purpose the fixing ring 245 cooperates with the detent 220 . For this purpose, the pawl 220 has a fastening contour 220d by means of which the pawl 220 can engage behind the fastening protrusion 247 . For the locking region 220a of the pawl 220, the securing contour 220d lies in a plane axially offset from the locking region 220a. The fastening ring 245 has, in addition to the fastening protrusion 247, two radially outwardly protruding blocking fingers 269, between which a blocking stop 253 protruding parallel to the axis A of the adapter 213 is received with play, so that Hold the retaining ring 245 in place. The aforementioned play compensates for the influence of rocking movements at the position of the fixing ring 245 during setting of the inclination of the backrest 202 .

The switching ring 265 is rotatably mounted coaxially with the axis A on a further step of the third fitting part 214 in the same manner as the mounting of the fixed ring 245 . The switching ring 265 is arranged between the fixed ring 245 and the third accessory part 214 along the axial direction, and the axial dimension of the ratchet 220 is equivalent to the axial dimension of the switching ring 265 plus the axial dimension of the fixed ring 245 plus the latch The sum of the axial dimensions of the element 215. The switching ring 265 has a radially outwardly protruding switching cam 267 which is arranged in the peripheral direction in the angular range between the second latch element 225 and the fixing protrusion 247 and has a radial growth in the counter-pivoting direction of the backrest 202 . or formed flanges. In order to cooperate with the switching cam 267, the pawl 220 has a switching finger 220e, which protrudes substantially axially from the pawl. With respect to the locking region 220a and the securing contour 220d, the switching finger 220e extends into a plane axially offset therefrom. In addition to the switching cam 267 , the switching ring 265 also has stop projections 249 which likewise protrude radially outward. Between the stop cam 249 and the adapter 213 a tension spring acts on the switching ring 245 in the peripheral direction relative to the axis A. This prestressing keeps the stop cam 249 against the blocking stop 253 in a contacting manner.

The vehicle seat 201 is adjustable in the longitudinal direction by means of the longitudinal adjuster 281, that is to say can be set in the longitudinal position of the seat. For this purpose, the longitudinal adjuster 281 with the two pairs of seat rails can be unlocked by means of a clamp 283 and is automatically locked after releasing the clamp 283 . However, during free pivoting of the backrest 202 by the handle bar 208, the longitudinal adjuster 281 is also unlocked, thereby enabling the vehicle seat 201 to be moved forward (via the longitudinal adjuster 281) so that in addition to the free pivoting of the backrest 202 , also makes it easier to use the rear seat. In this case, the longitudinal adjuster 281 is unlocked directly via the hand lever 208 or, in the case of the accessory 205 , indirectly, in the case of indirect unlocking on the side of the vehicle seat without the fastening ring 245 in an essentially In known manner, an unlocking ring is provided which is tensioned during the forward pivoting of the backrest 202 and then actuates the locking of the longitudinal adjuster 281 by means of a Bowden cable or the like.

The memory device of the longitudinal adjuster 281 is operatively connected to the fitting 205 by means of a second cable 285 (preferably a Bowden cable), by which the longitudinal position of the seat set before free pivoting can be found (memory position) . For this purpose, the switching ring 265 has radially protruding trigger fingers 287 which lie between the switching cam 267 and the stop cam 249 . The second cable 285 is fixed to the trigger finger 287 , for example at a trigger pin projecting axially from the trigger finger 287 , that is to say the memory of the longitudinal adjuster 281 actuates the switching ring 265 .

By unlocking the third fitting part 214 on both sides of the vehicle seat, the backrest 202 begins to pivot freely. The pawl 220 is lifted radially from the second latch stop 225 of the latch element 215 of the second fitting part 211 in the manner described above. As the backrest 202 pivots forward, the free end of the pawl 220 travels continuously and in each plane, causing the locking area 220a to abut against the radially outwardly directed side of the second latch stop 225, switching The finger 220d engages on the radially outwardly facing side of the switching cam 267 and the fastening contour 220d engages on the radially outwardly facing side of the fastening projection 247 . After passing the securing protrusion 247, the outer contour of the securing ring 245 springs back radially. Due to the shape of the fixing profile 220d, the pawl 220 hangs behind (radially inwardly) the fixing protrusion 247 and engages with the fixing profile 220d behind the fixing protrusion 247 (FIG. 7). The third fitting part 214 is thereby secured. The pawl 220 is held in this position by spring prestressing or by self-locking according to a particular form, however in this case the tension member 231 and the grip 229 do not fix the pawl 220 . However, in the absence of the switching ring 265 , the pawl 220 can be fixed in said position by the tension member 231 and the grip member 229 .

The forward pivoted backrest 202 is then in its free pivoting position, which allows unhindered use of the rear seat and is secured by the fixed third fitting part 214 . Meanwhile, the vehicle seat 201 is at the front longitudinal position of the seat. Since the angular position of the fixing protrusion 247 relative to the angular position of the first fitting part 209 and the angular position of the adapter 213 and the blocking stop 253 are constant (except for a very slight oscillatory movement due to the expected rocking movement), The third fitting part 214 and thus the backrest 202 are always fixed at the same position with respect to the first fitting part 209 and thus with respect to the seat part 203 , ie independently of the setting of the backrest 2 . slope.

To return to the original position, first, the vehicle seat 201 is moved backward again, for example by pulling the backrest 2 . When the memory position is reached, the longitudinal adjuster 281 is locked, and the second cable 285 is pulled at the same time. The second cable 285 engaged on the trigger finger 287 then rotates the switching ring 265 in the forward pivoting direction of the backrest 202 against its prestress. The pawl 220 , more specifically its switching finger 220 e , travels over the radially growing flange of the (moving) switching cam 267 of the switching ring 265 . As a result, with the progressive pivoting movement of the switching ring 265, the pawl 220 is lifted outward in the radial direction, that is to say, the cooperation between the pawl 220 and the fixed ring 245 is released, and the backrest 202 can be reversely pivoted without hindrance. change. The pawl 220 then passes the securing protrusion 247 and the second latch stop 225 and, when reaching the initial position, again hangs behind (radially inwardly) the second latch stop 225 with its locking region 220a, thereby locking the fitting again 205. The switching ring 265 , which is no longer subjected to the action of the second pull cable 285 , is drawn back to its original position again by the assigned tension spring.

In the modified form without switching ring 265, wherein the pawl 220 is fixed at the free pivoting position of the backrest 202 by the tension member 231 and the grip member 229, while the actuation of the hand lever 208 releases the suspension from the fixed protrusion. 247 rear pawls 220 . This behavior is possible even when the memory position has not been reached, for example due to objects in the footwell, ie the reset function is then also implemented.

However, in the first exemplary embodiment, the fixed ring 245 is substantially fixed in rotation, and the switch ring 265 is rotatable and held by a spring, which can be modified, according to which the switch ring 265 is substantially fixed in rotation. fixed, and the fixed ring 245 is rotatable and held (fixed) in a suitable manner.

FIG. 11 illustrates such a modification of the first exemplary embodiment in which a buffer 289 acting in the peripheral direction is located between the substantially rotationally fixed switching ring 265 and the fixed ring 245 . The buffer 289 is elastically compressible, such as a piece of rubber. A spring or another elastic element may also be used instead of the bumper 289 . This design (particularly suitable for vehicle seats 201 without a memory-equipped longitudinal adjuster 281) can act on the backrest 202, for example on the backrest head, in the freely pivoted position by applying the force of a counter-pivoting moment. , so that the orientation of the backrest 202 is released, wherein, by pivoting the third fitting part 214 backward, the pawl 220 and the fixing ring 245 can be pulled, while the buffer 289 is compressed along the switching cam 267 of the switching ring 265, until the pawl 220 is opened.

To complement the first exemplary embodiment, the fastening ring 245 is likewise held substantially rotationally fixed, that is to say by means of the blocking fingers 269 . The switching ring 265 is secured to the fixed ring 245 by a toggle lever 291 as shown in FIG. 12 . The toggle lever 291 includes a first lever 293 hinged on the switching ring 265 and a second lever 295 hinged on the fixed ring 245, the first lever and the second lever are hingedly connected to each other through a connecting joint 296, and are connected by two A toggle lever spring 297 acting between levers 293 and 295 remains in the extended position. The second cable 285 is suspended on the second rod 295 and is led to the memory device of the longitudinal adjuster 281 . During the return from the free pivot position to the initial position, the memory device pulls the second cable 285 upon reaching the memory position and brings the toggle lever 291 into the bent position against the force of the toggle lever spring 297 . As a result, the toggle spring 265 is rotated relative to the retaining ring 245 and the pawl 220 is opened by the toggle cam 267 so that the backrest 202 can be pivoted back into the use position.

In all further exemplary embodiments, the vehicle seat 1 for a two-door motor vehicle has a fitting 5 on each of its sides for setting the inclination and for freely pivoting its backrest 2 relative to its seat part 3 change. On one of the accessories 5 for setting the inclination function, on the outside of the vehicle seat 1, a handwheel 7 and a shaft between the two accessories 5 and connected to the handwheel 7 are arranged, while on the backrest 2 A hand lever 8 is movably mounted for a free pivoting function.

Each fitting 5 comprises as a core a first fitting part 9 and a second fitting part 11 , which structurally together form a disc-shaped unit. In the exemplary embodiment, the two fitting parts 9 and 11 are geared to each other via eccentric planetary gears (in this case self-locking) which in this case allow a play-free fixation of the fitting parts 9 and 11 , and for adjustment, the fitting parts 9 and 11 are relatively rotated in a superimposed rocking motion. Such a gear fitting is described, for example, in DE 4436101 A1, the disclosure content of which is expressly incorporated here. However, other gear fittings could be used, and even theoretically a pin fitting could be used as well.

The first fitting part 9 is connected ("fixedly relative to the seat part") to the structure of the seat part 3, wherein an adapter 13 fixedly mounted relative to the seat part is fastened to the first fitting part 9 . Each fitting 5 further comprises a third fitting part 14 which is connected (“fixedly relative to the backrest”) to the backrest structure of the backrest 2 . A disc-shaped third fitting part 14 is mounted on the second fitting part 11 on the side facing away from the first fitting part 9 and is pivotable about a central axis A for free pivoting centrally relative to the second fitting part 11 turn, but otherwise interlocks with the second fitting part 11. The axis A and its position in the vehicle seat 1 define the direction indication used in this case. The conditions of the backrest 202 in the use position ( FIGS. 14 , 19 ) suitable for seated use will again first be described below, in which case the gear fittings used define a number of possible use positions.

In the second and third exemplary embodiments, an annular latch element 15 on the second fitting part 11 is used to mount the third fitting part 14 . The latch element 15 is fixedly connected to the second fitting part 11 by laser welding (or otherwise). An annular fastening disk 17 , which engages on the third fitting part 14 in the bearing region, is fixedly connected to the second fitting part 11 and fixed to the latch element 15 for axially fixing the third fitting part 14 .

For locking the third fitting part 14 , the latch element 15 has, in addition to the integrally formed first latch stop 19 , a latch step 21 . The latch step 21 provided at the edge of the latch element 15 protrudes axially towards the third fitting part 14 relative to the axis A and is formed by two axially opposite bends offset in the peripheral direction. The grip pawl 22 is pivotally mounted on the third fitting part 14 on the side facing the second fitting part 11 via a bearing peg 24 . The bearing pin 24 simultaneously serves as a stop cooperating with the first bolt stop 19, that is to say, the bearing pin 24 limits the rearward pivoting movement of the third fitting part 14, in particular in the normal position and in the (rear) crash position. Both are true. In order to limit the forward pivoting movement of the third fitting part 14 in the (front) impact position, a second latch stop 25 is arranged in a radial projection of the grip pawl 22 at a distance from the grip pawl 22 a short distance. In the event of a frontal collision, the grip pawl 22 rests against the second latch stop 25 without the second latch stop 25 exerting an opening moment on the grip pawl 22 .

The tension pawl 30 is pivotally mounted on the support pin 26 of the grip pawl 22 and is additionally connected to the grip pawl 22 by a mortise-and-tongue guide 32 . The tensioning pawl 30 has an integrally formed tensioning tooth 34 , which is acted upon by a tensioning spring 36 designed as a helical spring and thus bears prestressed against the latch step 21 with said tensioning tooth 34 rear flange. As a result, the third fitting part 14 is interlocked without play with the latch element 15 and thus with the second fitting part 11 . In this case, the tensioning spring 36 prestresses both the grip pawl 22 and the tensioning pawl 30 as a common spring in the closing direction, ie in the radial direction. A cover 38 secured to the third fitting part 14 covers the tension pawl 30 , the grip pawl 22 , as well as the support peg 24 and the tension spring 36 . On the side of the tensioning pawl 30 facing away from the second fitting part, an unlocking pin 40 protrudes axially from the tensioning pawl 30 and passes through the third fitting part 14 in a curved slot connection. On the side of the third fitting part 14 facing away from the second fitting part 11 , a first cable 42 operatively connected to the hand lever 8 is fixed to the unlocking pin 40 . The unlocking pin 40 can also be provided on this side of the third fitting part 14 with the cover for the slot connection. To unlock the third fitting part 14, the unlocking pin 40 is moved by the first cable 42 (in the slot connection) and at the same time brings the tension pawl 30 with it and opens it, that is to say the pawl 30 Disengaging from the latch step 21 allows the tension pawl 30 to open the grip pawl 22 .

On at least one side of the vehicle seat (or on both sides of the vehicle seat), the fitting 5 is designed so that the fixing ring 45 is rotatably mounted coaxially with the axis A on the third fitting part 14 (or alternatively, the latch element 15 Or on the step of the second fitting part 11 ), and arranged in the plane of the plug step 21 in the axial direction between the latch element 15 and the third fitting part 14 . The fastening ring 45 has fastening projections 47 which protrude radially outward and are arranged in the vicinity of the latch step 21 . A fixing ring 45 is provided together with a fixing protrusion 47 for fixing the third fitting part 14 in a freely pivotable position of the backrest 2 , said fixing protrusion cooperating with the tensioning pawl 30 for this purpose.

The second and third exemplary embodiments correspond to each other to a certain extent. According to the second exemplary embodiment, the securing ring 45 also has stop projections 49 which likewise protrude radially outward. With respect to the axis A, a blocking lever 51 pivotally mounted on the adapter 13 acts in peripheral direction on the retaining ring 45 at the stop protrusion 49 (outside of the self-locking) and keeps the stop protrusion 49 in contact with the bearing against the rotating shaft. The axially protruding blocking stopper 53 of the connector 13. The blocking lever 51 is acted upon and fixed by a tensioning lever 55 which is likewise pivotally mounted on the adapter 13 , wherein the tensioning lever 55 bears with a concave tensioning contour 57 against a blocking pin 59 protruding axially from the blocking lever 51 , and the blocking pin 59 cannot apply the opening moment to the tension rod 55 . A tensioning spring 61 acting between the fastening projection 47 and the tensioning rod 55 ensures the necessary prestressing of the tensioning rod 55 . The trigger pin 63 protrudes from the tensioning rod 55 in the axial direction and in this case protrudes through a slot connection in the adapter 13 .

In both the second and third exemplary embodiments, the switching ring 65 is pivotally mounted coaxially with the axis A on a further step of the third fitting part 14 in a manner corresponding to that of the fixed ring 45 . The switch ring 65 is arranged between the fixed ring 45 and the third accessory part 14 in the axial direction in a plane parallel to the latch step 21, and the axial dimension of the tension pawl 30 is equivalent to the axial dimension of the switch ring 65 Add the sum of the axial dimensions of the fixing ring 45 . The axial dimension of the fixing ring 45 is equivalent to the axial dimension of the latch step 21 . The switching ring 65 has a switching cam 67 which protrudes radially outward and is arranged in the circumferential direction in the angular range between the latch step 21 and the fixing protrusion 47 and has a reverse pivoting motion along the backrest 2 . A flange that grows radially in the direction. In the second exemplary embodiment, furthermore, the switching ring 65 has two blocking fingers 69 which protrude radially outwards and receive between them the blocking stop 53 of the adapter 13 with play , as a result, the switching ring 65 is maintained. Said play compensates for the influence of a rocking movement of the fitting parts 9 and 11 relative to each other in the position of the switching ring 65 during setting of the inclination of the backrest 2 .

In the second and third exemplary embodiments, the vehicle seat 1 is longitudinally adjustable, that is, settable at the longitudinal position of the seat by the longitudinal adjuster 81 . For this purpose, the longitudinal adjuster 81 with the two pairs of seat rails can be unlocked by the clamp 83 and is automatically locked after the clamp 83 is released. However, even during the free pivoting of the backrest 2 by the handle bar 8, the longitudinal adjuster 81 is unlocked so that the vehicle seat 1 can be moved forward (via the longitudinal adjuster 81), so that, in addition to allowing the backrest 2 to pivot freely In addition, it is also easier to use the rear seat. In this case, the longitudinal adjuster 81 is unlocked directly via the hand lever 8 or, in the case of the accessory 5 , indirectly, in which case the unlocking ring is arranged in a manner known per se on the handle without the fixing ring 45 . On the side of the vehicle seat, and is tensioned during the forward pivoting of the backrest 2, the locking of the longitudinal adjuster 81 is then actuated by Bowden cables or the like. The memory device of the longitudinal adjuster 81 is operatively connected to the accessory 5 by means of a second cable 85 (preferably a Bowden cable), by means of which memory device the longitudinal position of the seat set before free pivoting (memory position) can be found .

By unlocking the third fitting part 14 on both sides of the vehicle seat, the free pivoting of the backrest 2 is initiated. In the second and third exemplary embodiments, the tension pawl 30 and the grip pawl 22 are lifted radially from the latch element 15 of the second fitting part 11 in the manner described above. With the forward pivoting movement of the backrest 2 , the tensioning pawl 30 with its tensioning teeth 34 sequentially travels onto the radially outwardly facing side of the latch step 21 , the switching cam 67 and the securing projection 47 . After passing the securing projection 47 , the outer contour of the securing ring 45 springs back radially. The tensioning pawl 30 then hangs behind (radially inwardly) the securing protrusion 47 and engages behind the securing protrusion 47 (in self-locking), with the result that the third fitting part 14 is secured.

The forward pivoted backrest 2 is then in its free pivoting position, the backrest 2 allowing unhindered use of the rear seat and secured by securing the third fitting part 14 . At the same time, the vehicle seat 1 is in the front longitudinal position of the seat. Since the angular position of the fixing protrusion 47 relative to the angular position of the first fitting part 9 and the angular position of the adapter 13 and the blocking stop 53 are constant (except for a very slight oscillating movement due to the expected rocking movement), the second The three fitting parts 14 and thus the backrest 2 are always fixed in the same position relative to the first fitting part 9 (and thus relative to the seat part 3 ), ie independently of the set inclination of the backrest 2 .

In order to return to the initial position, first, the vehicle seat 1 is moved backward again, for example by pulling the backrest 2 . When the memory position is reached, the longitudinal adjuster 81 is locked while pulling the second cable 85 .

In the second exemplary embodiment, the second cable 85 is mounted on the trigger pin 63 of the tension rod 55 , that is to say the memory means activates the action means of the fixing ring 45 . Thus, when the memory device of the longitudinal adjuster 81 pulls the second cable 85 , the second cable 85 pivots the tensioning lever 55 and consequently also releases the blocking lever 51 located outside the self-locking. The third fitting part 14 , which introduces force on the backrest 2 , tensions together with the backrest 2 via the tensioning pawl 30 a fastening ring 45 which is then freely pivotable in the peripheral direction. The tensioning tooth 34 runs onto the radially extending collar of the (retained) switching cam 67 of the switching ring 65 . As a result, as the backrest 2 continues to pivot backwards, the tensioning pawl 30 is lifted outwards in the radial direction, that is, the cooperation of the tensioning pawl 30 and the fixing ring 45 is released, and the backrest 2 can Pivot in reverse without hindrance. The tensioning pawl 30 then passes the securing protrusion 47 and the latch step 21 and, when reaching the initial position, again hangs behind (radially inwardly) the latch step 21, thereby locking the fitting 5 again. The retaining ring 45 released from the tensioning pawl 30 is pulled back by the tensioning spring 61, so that the blocking lever 51 and the tensioning lever 55 also assume their original positions again.

If, for example, the memory position is not reached due to objects in the footwell, the tensioning pawl 30 hanging behind the fixing protrusion 47 can be released by actuating the handle lever 8, that is to say, a reset function is realized .

The third exemplary embodiment is identical to the second exemplary embodiment unless described to the contrary, therefore identical or functionally identical components carry the same reference numerals.

According to a third exemplary embodiment, the fixing ring 45 has, in addition to the fixing protrusion 47 , two blocking fingers 69 which protrude radially outwards and receive the blocking of the adapter 13 with play between them. The stop 53, as a result, holds the retaining ring 45. Said play compensates for the influence of rocking movements at the position of the fastening ring 45 during setting of the inclination of the backrest 2 . The switching ring 65 has, in addition to the switching cam 67 , a stop cam 49 which likewise protrudes radially outward. The tension spring 61 acts between the stop cam 49 and the adapter 13 , and acts on the retaining ring 45 relative to the axis A in the peripheral direction. This prestress causes the stop cam 49 to bear against the blocking stop 53 in a contacting manner. The switching ring 65 also has a radially protruding trigger finger 87 between the switching cam 67 and the stop cam 49 . The second cable 85 is fixed to the triggering finger 87 , for example at the triggering pin 63 protruding axially from said triggering finger 87 , that is to say the memory of the longitudinal adjuster 81 actuates the switching ring 65 .

The second and third exemplary embodiments agree with respect to the locking of the third fitting part 14 in the initial position, that is to say the unlocking of the third fitting part 14 when the backrest 2 is in the use position, the backrest 2 The free pivoting of the third fitting part 14 in the free pivoting position of the backrest 2 and the pushing back of the vehicle seat 1 to the memory position. When the memory position is reached, the longitudinal adjuster 81 is locked while pulling the second cable 85 .

The second cable 85 engaging on the trigger finger 87 then rotates the switching ring 65 in the forward pivoting direction of the backrest 2 against its prestressing force. The tensioning tooth 34 runs onto the radially extending collar of the (moving) switching cam 67 of the switching ring 65 . As a result, with the progressive pivoting movement of the switching ring 65, the tensioning pawl 30 is lifted outwards in the radial direction, that is to say, the cooperation between the tensioning pawl 30 and the fixing ring 45 is released, and the backrest 2 can be reversed. Pivot without hindrance. The tensioning pawl 30 then passes the securing protrusion 47 and the latch step 21 and, when reaching the initial position, again hangs behind (radially inwardly) the latch step 21, thereby locking the fitting 5 again. The switching ring 65 released by the second cable 85 is pulled back to its initial position by the tension spring 61 . In the third exemplary embodiment, the reset function by the actuation of the hand lever 8 when the memory position is not reached is also realized.

However, in the third exemplary embodiment, the fixed ring 45 is substantially fixedly provided in terms of rotation, and the switch ring 65 is rotatable and can be held by a spring, which can be modified, therefore, according to the second exemplary embodiment In an embodiment, the switch ring 65 is substantially fixed in rotation, and the fixed ring 45 is rotatable and held by a spring. This modification is particularly suitable for vehicle seats 1 which are not provided with a longitudinal adjuster 81 of memory and allows the backrest 2 to be released in a directional manner by acting on the backrest 2 in a freely pivoted position, for example on the head of the backrest , because, by pivoting the third fitting part 14, the tensioning pawl 30 and the fixing ring 45 can be pulled along the switching cam 67 of the switching ring 65 until the tensioning pawl 30 is opened.

List of reference signs

201.1 vehicle seat

202, 2 backrests

203, 3 seat sections

205, 5 accessories

207, 7 hand wheel

208, 8 hand levers

209.9 Part 1 of accessories

211, 11 Second accessories part

213, 13 adapter

214,14 The third accessories part

215, 15 pin components

217, 17 fixed plate

219, 19 The first latch stopper

220 pawl

220a Locked area

220b bearing surface

220c unlock finger

220d Fixed profile

220e switch fingers

224, 24 support pin

225, 25 Second latch stopper

226 bearing bushing

227 unlock shaft

229 gripping piece

231 tensioning piece

232, 32 Mortise-and-tongue guides

236, 36 Tension spring

237 coil spring

238,38 cover

242, 42 The first cable

245, 45 fixing ring

247, 47 fixed protrusion

249, 49 stop protrusion

253, 53 Block stop

265, 65 switch ring

267, 67 switch cam

269,69 Blocking fingers

281, 81 Longitudinal adjuster

283, 83 clamping parts

285,85 second cable

287,87 trigger finger

289 buffer

291 toggle lever

293 first shot

295 second shot

296 Connecting joints

297 toggle lever spring

21 latch steps

22 Grab pawls

26 Support pin

30 tension pawl

34 tension teeth

40 Unlock pin

51 blocking rod

55 tension rod

57 Tightening the profile

59 blocking pin

61 tension spring

63 trigger pin

A axis

Claims (16)

1. A fitting for a vehicle seat, in particular a motor vehicle seat, having: a first fitting part (209, 9) fixed relative to the seat part; a second fitting part (211, 11), which is relatively Rotating on said first accessory part (209, 9) for setting the inclination of the backrest (202, 2) of said vehicle seat (201, 1) between a plurality of use positions; the third accessory part ( 214, 14), which is fixed relative to the backrest, interlockable with the second fitting part (211, 11) and pivotable about the axis (A) relative to the second fitting part (211, 11). so that the center of the backrest (202, 2) can pivot freely, and the third fitting part can be fixed at the free pivot position of the backrest (202, 2); and for locking and/or fixed at least one pawl (220, 30), said accessory being characterized in that the same pawl (220, 30) both locks said third accessory part (214, 14) to said backrest (202, 2) It is also fixed in the free pivoting position of said backrest (202, 2) in its use position. 2. Fitting according to claim 1, characterized in that the pawl (220, 30) assigned to said third fitting part (214, 14) co-operates with said fixing ring (245, 45) The third fitting part (214, 14) is fixed to the free pivoting position of the backrest (202, 2), wherein the fixing ring is mounted on the second fitting part (211, 11), in particular held in on said first fitting part (209, 9). 3. Fitting according to claim 2, characterized in that said detents (220, 30) engage in said fixing ring (245, 45) during cooperation with said fixing ring (245, 45). behind the protrusions (247, 47), said detents (220, 30) preferably hanging radially inwards behind said securing protrusions (247, 47), in order to cooperate with said securing rings (245, 45), When the cooperation is released, the pawls ( 220 , 30 ) are preferably lifted radially outwards. 4. The accessory according to claim 2 or 3, characterized in that a switching ring (265, 65) that can rotate relative to the fixed ring (245, 45) is provided, and it is positioned between the fixed ring (245, 45) The cooperation of the pawl (220, 30) and the fixed ring (245, 45) is released during relative rotation with the switching ring (265, 65). 5. Accessory according to claim 4, characterized in that said switching ring (65, 165) has a switching cam (67, 167) with The flange that grows radially against the direction of pivoting, in particular, in order to release the cooperation of the pawl (220, 30) and the fixed ring (245, 45), the fixed ring (245, 45) or the Said switching ring (265, 65) turns in particular against the prestress in the forward pivoting direction of said backrest (202, 2), as a result, preferably with switching fingers cooperating with said switching ring (265) ( 220e) the pawls (220, 30) preferably travel onto the radially growing flanges of the switching cams (267, 67) of the switching ring (265, 65) and follow the fixed ring (245, 45) Or the progressive pivoting movement of said toggle ring (265, 65) is lifted. 6. Fitting according to any one of claims 4-6, characterized in that the fixing ring (245, 45) or the switching ring (265, 65) is preferably at all The adapter (213, 13) or other ring (265, 245, 65, 45) fixedly connected to said first fitting part (209, 9) or other ring (265, 245, 65, 45) is fixed:. 7. Fitting according to any one of the preceding claims, characterized in that the pawl (220, 30) assigned to the third fitting part (214, 14) engages the third fitting part, in particular without play. part (214, 14) is interlocked with said second fitting part (211, 11) in the use position of said backrest (202, 2), in particular by means of a locking region (220a) and in particular by a fixed connection The above-mentioned interlocking is carried out by a latch element (215, 15) to said second fitting part (211, 11). 8. Fitting according to any one of the preceding claims, characterized in that an unlocking shaft (227) is provided, the rotation of which about its own axis acts at least indirectly on said pawl (220, 30) To unlock, said unlocking shaft (227) is preferably rotatably mounted in said third fitting part (214). 9. Accessory according to any one of the preceding claims, characterized in that in order to lock the third accessory part (214, 14) in the use position of the backrest (202, 2), a spring-loaded pull The fastener (231) holds said pawl (220, 30) in its position during normal use of the seat, in particular by acting on the bearing surface (220b) of said pawl (220, 30). 10. Fitting according to any one of the preceding claims, characterized in that in order to lock the third fitting part (214, 14) in the use position of the backrest (202, 2), in particular a spring A loaded grip (229) supports the pawls (220, 30) in case of a crash. 11. The accessory according to any one of claims 8, 9, 10, characterized in that, the tensioning member (231) and the gripping member (229) can be surrounded by the unlocking shaft (227) pivoting on a defined common axis, said tensioning member (231) is preferably rotationally fixedly located on said unlocking shaft (227) and/or is connected to said unlocking shaft for tensioning, said grip A member (229) is preferably pivotably seated on said unlocking shaft (227) and/or is connected to said unlocking shaft (227) for activation, in particular said tensioning member (231) and said The grip ( 229 ) is preferably connected by a mortise-and-tongue guide ( 232 ) for tensioning with free play. 12. Fitting according to any one of the preceding claims, characterized in that said first fitting part (209, 9) and said second fitting part (211, 11) structurally together form a disc-shaped unit. 13. Fitting according to any one of the preceding claims, characterized in that said first fitting part (209, 9) and said second fitting part (211, 11) are connected by means of special self-locking eccentric planetary gears Geared to each other, said eccentric planetary gears preferably cause relative rotation of said first fitting part (209, 9) and said second fitting part (211, 11) with a superimposed rocking motion. 14. A vehicle seat (201, 1) with a backrest (202, 2) and a longitudinal adjuster (281, 81), the backrest (202, 2) being tilt-adjustable and freely pivotable , by means of the longitudinal adjuster (281, 81), the vehicle seat (201, 1) can be moved forward during the free pivoting of the backrest (202, 2), characterized in that, as in the preceding claims At least one accessory (205, 5) according to any one, which is used for setting the inclination and free pivoting of the backrest (202, 2). 15. The vehicle seat according to claim 14, characterized in that said longitudinal adjuster (281, 81) has a memory means which finds the longitudinal position of said seat which was set before said free pivoting and then causes One of said rings (245, 265, 45, 65) or its acting device (285) is moved. 16. The vehicle seat according to claim 14, characterized in that, when the longitudinal position of the seat provided before said free pivoting is not reached, said pawl (220; 30), said retaining ring (245, 45) or actuation of said toggle ring (265, 65) to release said pawls (220, 30) from cooperating with retaining rings (245, 45).

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