DE102008063357A1 - Vehicle seat, particularly commercial vehicle seat, has scissor-type vehicle seat, particularly commercial vehicle seat, has scissor-type stand and seat frame rotated by pivoting axis, where seat frame is inclined relative to stand - Google Patents

Abstract

The vehicle seat (1) has a scissor-type stand (3) and a seat frame (10) rotated by a pivoting axis (B), where the seat frame is inclined relative to the stand. A crash active seat surface rotating device is rotated in the crash fall of the seat frame relative to the scissor-type stand under lifting the front seat edge or under lowering of the rear seat edge.

Description

The The invention relates to a vehicle seat, in particular a utility vehicle seat, with the features of the preamble of claim 1.

Known vehicle seats with scissor frame are usually used for commercial vehicles. While in a simple embodiment, the seat frame is a part of the scissors-type frame or is fixedly connected thereto, the seat frame may be tilt-adjustable relative to the scissors-type frame to increase seating comfort, for example by hinging the seat frame to the scissors-type frame and a linear adjuster or gearbox relative to the seat frame Scissors frame pivots Such an improved vehicle seat of the type mentioned is from the DE 32 43 747 C2 known.

From the DE 20 2008 002 339 U1 is a commercial vehicle seat with a frame, in particular a scissors frame, a hinged thereto with a pivot axis seat frame and a back known, which is mounted on the seat frame and by means of which in a crash or misuse case a torque acts on the seat frame, wherein the frame a first catch element and the Seat frame has a second catch element, which are normally spaced from each other without interaction and in a crash or misuse approach each other and then cooperate to create a further way for the power flow.

Of the Invention is based on the object, a vehicle seat of the beginning be further improved, in particular with regard to the crash safety in the event of a rear or front crash. These Object is achieved by a vehicle seat solved with the features of claim 1. advantageous Embodiments are the subject of the dependent claims.

According to the invention a vehicle seat, in particular a utility vehicle seat, with a scissor frame, a seat frame hinged thereto with a pivot axis, which at least in the event of a crash relative to the scissor frame in its inclination is changeable, with a crash-active Sitzflächenschwenkvorrichtung Part of the vehicle seat is which, in the event of a crash, the seat frame raising the front seat edge and / or lowering the rear Seat edge pivoted relative to the scissors frame. By providing the crash-active Sitzflächenschwenkvorrichtung which in the event of a crash, the seat frame can be pivoted about its pivot axis the occupant in the event of a crash more space for movement of the upper body be provided to the steering wheel, so that the Impact of the upper body on the steering wheel prevented or at least significantly reduces the chances of survival of the occupant significantly increased, d. H. Reduced injuries or avoided. In particular, by lifting the front Seat edge and / or a lowering of the rear seat edge and a Diving under the lap belt prevented. The crash-active seat swinging device offers both in the event of a rear-end crash and in the case of a Front crash improvements.

The Crash-active Sitzflächenschwenkvorrichtung has according to a preferred embodiment of an airbag, which between the seat frame and the scissors frame, in particular the upper frame the same is arranged, wherein he in the case of triggering the Seat frame pivoted relative to the scissor frame about the pivot axis. The technology for airbags is well-engineered and good for Such movements are suitable in the event of a crash. Of course you can Place airbags also other quickly releasable energy storage used, such as springs or trigger mechanisms for belt tensioners.

alternative to a the seat from the top pushing up Airbag or the like, the same pivotal movement of the seat also be effected by a force, which in the rear area acts and lowers the rear seat edge. This can be, for example by a mechanical or pyrotechnic tightening, which via a power transmission means, such as For example, a rope of sufficient tensile strength, with the rear Seat edge and the scissors frame cooperates.

Thereby, that the seat frame on the one hand hinged directly to the scissor frame is and on the other hand by means of at least one Dreigelenks with the scissors frame hinged connected, stands a simple tilt adjustment available, which is done by driving the Dreigelenks. Of the Drive can be accomplished using conventional drive devices take place, preferably a tilt adjustment fitting, the Dreigelenk in addition to a hinged to the tilt adjustment fitting Handlebar is provided. With the tilt adjustment fitting it can be a catch fitting or gear fitting, as he is known per se for adjusting the Lehnenneigung. This reduces the costs. There are versions with disk-shaped Units and those with radially protruding mounting straps possible. The tilt adjustment fitting is used for pivoting the seat frame in the event of a crash, but can also be used for tilt adjustment to serve in normal use.

The pivot axis of the seat frame is preferably arranged in the longitudinal direction of the seat below the hip point of an occupant or further to the rear, offset in the direction of the backrest. This provides for one egg NEN large lever arm for the crash-active Sitzflächenschwenkvorrichtung available so that the applied forces can be kept relatively small, on the other hand there is a relatively large pivotal movement, which moves the legs of the occupant from the most vulnerable area near the pedals.

in the Triangle joint is preferably at least one tilt adjustment fitting provided, which defines a tilt adjustment axis and which between on the one hand the seat frame or the scissor frame and on the other a Lenker the Dreigelenks is effective, with the crash-active Sitzflächenschwenkvorrichtung in the event of a crash the tilt fitting unlocked. Here, the unlocking takes place in a first step, then the lifting movement takes place while pivoting the vehicle seat around the seat frame pivot axis.

alternative at least one predetermined breaking point can be provided in the three-jointed joint, which breaks in the event of a crash and so also the movement between Seat frame and scissors frame releases.

The Backrest is preferably about a fitting, about an adapter and a fitting or mounted directly on the seat frame, so that in the event of a crash when the seat surface pivoting device is triggered the back is pivoted at the same angle about the pivot axis, like the front seat edge.

One The belt tensioner particularly preferably supports the function the crash-active Sitzflächenschwenkvorrichtung, so that the occupant is held with his back to the back, which pivots at the same angle about the pivot axis, like the front seat edge, so that in case of a crash sufficient space in front of the Upper body of the occupant is present. Especially preferred the inmate is withdrawn so far that preferred an airbag that integrates in the steering wheel and / or in the instrument panel is in contact only during the final phase of its inflation with the occupant.

On the vehicle seat side opposite the inclination adjustment fitting may be one with a tilt adjustment axis defined by the tilt adjustment fitting aligned first joint and another handlebar be provided. This reduces the number of components and also the cost. The Define tilt adjustment axis and the two joints of the handlebar preferably the Dreigelenk. The geometry of the triple-joint is preferably optimized with regard to the moments occurring. For example an axial offset between the pivot planes of the joints, for example, inclination adjustment fitting or lever on the one hand and handlebars on the other hand, if, for example between inclination adjustment fitting or lever on the two sides of the vehicle seat a crossbeam is provided, the advantage that no bending moments be exercised on such a crossbeam.

Preferably For example, the scissor-type frame has a first catching element and the seat frame a second catch element, which in the normal case, d. H. also in the case a crash, without interaction and in case of a crash Failure of Sitzflächenschwenkvorrichtung or misuse case due to a torque which, by means of the backrest on the seat frame attacks, approach each other and then interact, in particular in contact with each other, creating another way for the power flow, the forces are not just about the deflection point of the seat frame on the scissors frame and the linear adjuster or the gearbox passed, but in parallel over the catch elements. This results in a better load transfer from the seat frame to the scissor frame and / or the substructure, which a smaller dimensioning of the force flow parallel to the Catch elements lying components allowed and thereby the total Cost of production and weight reduced. This advantage will preferably reinforced by the fact that the catch elements the Increase support length by the catch elements are provided spaced from the articulation point, at a centrally hinged seat frame, for example, at the end of the same. In easy to produce designs are the catch elements as a stop angle, teeth, hooks, bolts, edges of openings or the like is formed

in the Below is the invention with reference to several, partly in the drawing illustrated embodiments, explained in more detail. Show it

1 a two examples of commercial vehicle seats common perspective partial view without padding,

2 a two examples common, schematic side view,

3 a two examples of seats common side view in a normal case at an inclination angle of 0 ° between the seat frame and scissors frame,

4 a 3 corresponding side view in the event of a crash before the Sitzflächenschwenkvorrichtung is active or in case of failure of Sitzflächenschwenkvorrichtung,

5 a two examples common, schematic representation of all joints,

6 a schematic representation of the Dreigelenks,

7 a partial perspective view of the first example on the vehicle seat side with inclination adjustment fitting,

8th a partial perspective view of the first example on the opposite side of the vehicle seat,

9 a partial perspective view of the second example on the vehicle seat side with inclination adjustment fitting,

10 a partial perspective view of the second example on the opposite side of the vehicle seat,

11 a schematic side view of a vehicle seat according to the first embodiment with Sitzflächenschwenkvorrichtung and belt tensioners,

12 a schematic detail view of the area XII of 11 the inclination adjusting device and the crash-active seat surface swiveling device according to the embodiment,

13 a schematic side view of a second embodiment with an alternative arrangement for unlocking the tilt adjustment with dashed lines, raised position of the vehicle seat in the event of a crash, and

14 a perspective, simplified representation of a third embodiment with modified seat tilt in the event of a crash.

A vehicle seat 1 for a commercial vehicle or another motor vehicle has a scissors rack 3 on which a subframe 5 , an upper frame arranged above it 7 and on both sides a pair of crossed wings 8th includes. A scissors axis A connects the two crossing points and at the same time defines the axis about which the wings swing 8th can pivot relative to each other. The wings 8th are each at their rear end on the subframe 5 or on the upper frame 7 hinged and each have at their front end rotatable rollers, by means of which they are in or on the upper frame 7 or subframe 5 are movably guided in the seat longitudinal direction. Through this movement of the wings 8th becomes the height of the upper frame 7 above the subframe 5 set. The scissors rack 3 is present by means of seat rails 9 slidable in the seat longitudinal direction, bringing the vehicle seat 1 is longitudinally adjustable, ie its seat longitudinal position is adjustable.

The vehicle seat 1 also has a seat frame 10 on which - about a horizontal seat frame pivot axis B relative to the scissor frame 3 swiveling - on the upper frame 7 hinged on both sides. In the present case, this seat frame pivot axis B - seen in the seat longitudinal direction - slightly behind the center of the seat frame 10 arranged. At the front end of the seat frame 10 is on a vehicle seat side, a first joint 11 and on the opposite vehicle seat side aligned therewith a tilt adjustment fitting 12 intended. Alternatively, tilt adjustment fittings are provided on both vehicle seat sides 12 provided the same type. The tilt adjustment fitting 12 has two relatively rotatable fittings 12a and 12b defining an inclination adjustment axis N (which coincides with the first joint 11 flees). The two fitting parts 12a and 12b are locked together (latching fitting), such as in the WO 00/44582 A1 described, the related disclosure of which is expressly incorporated, or are in gear transmission (geared fitting), for example by means of a self-locking eccentric epicyclic gear, such as in the DE 44 36 101 A1 described, the related disclosure of which is expressly incorporated. Such inclination adjustment fittings 12 are known per se for the adjustment of backrest inclination.

The first fitting part 12a the tilt adjustment fitting 12 is fixed to the seat frame 10 connected while the second fitting part 12b a first lever 13 attached (or alternatively molded) is. With the first lever 13 is a handlebar in a manner described in more detail later 14 hingedly connected, for this purpose at its one end a second joint 14a having. The driver 14 is with its other end by means of a third joint 14b on the upper frame 7 hinged. This defines the tilt adjustment axis N and the handlebars 14 with its two articulation points 14a and 14b a three-jointed

On the other side of the vehicle seat is a second lever 13b provided, which, as in the present case with the inclination adjustment fitting 12 aligned first joint 11 is provided, in its dimensions in the circumferential and radial directions (with respect to the first joint 11 ) the second fitting part 12b with the first lever 13 equivalent. In the alternative version with another inclination adjustment fitting 12 on the other side of the vehicle is the second lever 13b same as or mirror image of the first lever 13 educated. Another handlebar 14 same type, ie the same or mirror image training, on the one hand by means of a second joint 14a on the second lever 13b and on the other hand by means of a third joint 14b on the upper frame 7 hinged. In all cases, a three-joint between seat frame is thus on both sides 10 and upper frame 7 intended.

By means of the or the Einstellseinstellbeschläge 12 and the three joints is the inclination of the seat frame 10 relative to the upper frame 7 and with it to the scissors rack 3 adjustable. The drive of the or the Einstellseinstellbeschläge 12 takes place in a conventional manner manually or by motor. The seat frame 10 carries in a conventional manner a seat with a seat cushion. By means of a spring 15 , preferably a gas spring, and preferably a damper is the scissors-type frame 3 a swinging system that increases sitting comfort.

On the seat frame 10 (or alternatively on the scissors frame 3 , especially on the upper frame 7 the same) is at the rear end on both sides each a backrest adapter 16 attached. A backrest 20 is by means of both sides provided backrest fittings 22 on the backrest adapters 16 pivotally mounted about a backrest pivot axis C. The rest 20 can in a modified version by means of backrests 22 directly on the seat frame 10 (or alternatively on the scissors frame 3 , especially on the upper frame 7 the same) about the backrest pivot axis C pivotally mounted. The drive of the backstays 22 done manually or by motor. In a further modification is only on a vehicle seat side a backrest fitting 22 and provided on the other vehicle seat side a joint.

The backrest fittings 22 can like the tilt adjustment fittings 12 be designed as latching fittings or geared fittings, preferably with a self-locking eccentric epicyclic gear, and preferably form a disc-shaped unit in terms of construction. The rest 20 is by means of the backrest fittings 22 relative to the seat frame 10 swiveling and adjustable in inclination. The rest 20 is padded in a conventional manner.

At the rear end of the upper frame 7 is - in each case on both vehicle seat sides - a first catch element 31 provided while at the rear end of the seat frame 10 for cooperation with each intended first catch element 31 each a second catch element 32 is provided. The catch elements 31 and 32 are from the pivot point of the seat frame 10 on the upper frame 7 spaced. The two catch elements 31 and 32 on each side of the vehicle seat are arranged so that they do not normally interact. However, biting or the like is possible. In case of a frontal crash or severe abuse, if at the back 20 a force attacking the front, attacks by means of the backrest 20 a torque acting in the sense of a pivoting movement forward about the seat frame pivot axis B on the backrest 20 attached seat frame 10 at. This moves the upper frame 7 Seat frame hinged to the seat frame pivot axis B. 10 tends to be at its front end down and at its rear end upwards. As a result, the second catch element approaches 32 the first catch element 31 and comes - in this case at about 4 ° relative to the horizontal down - in contact with the first catch element 31 ie the two catch elements 31 and 32 act together in the event of a crash or the like. Through this interaction and the other way for the power flow better load transfer from the seat frame 10 to the scissors rack 3 ,

in this respect Both examples of vehicle seats match.

As already mentioned, for the three joints tilt adjustment fittings 12 used, as they are known for adjusting the backrest angle. Such a tilt adjustment fitting 12 Can therefore on the fitting parts 12a and 12b radially protruding, molded fastening straps (and retaining clips for the axial cohesion of fittings 12a and 12b ), which is described as a first example of a vehicle seat, or structurally a disc-shaped unit (and having an axial cohesion Umklammerungsring), which is described as a second example of a vehicle seat. To simplify the logistics are preferably in each example, the backrest fittings 22 and the tilt adjustment fittings 12 of the same type.

In the first example is on the one vehicle seat side to the first lever 13 , preferably by the attachment tabs on the second fitting part 12b and the associated retaining clip is formed, a cross-beam 40 fastened (optionally by means of another adapter), preferably welded. The crossbar 40 For example, a pipe is arranged parallel to the seat frame pivot axis B and extends to the other vehicle seat side. Axially offset to the first lever 13 is at the crossbar 40 the driver 14 by means of the second joint 14a hinged. The axis of the tilt adjustment fitting 12 , the second joint 14a and the crossbeam 40 mark the corners of a triangle, whose geometry is optimized with respect to the drive torque in the three-jointed.

On the other, the first joint 11 having vehicle seat side is the second lever 13b provided, on the one hand by means of the first joint 11 on the seat frame 10 hinged and on the other hand also on the crossbeam 40 is attached, preferably welded. The first lever 13 , the second lever 13b and the crossbeam 40 thus form a solid unit. Also on the first joint 11 having vehicle seat side is the handlebar 14 axially offset to the second lever 13b With of the second joint 14a at the crossbeam 40 , so at the said unit, articulated. Both handlebars 14 are each by means of the third joint 14b on the upper frame 7 articulated, more precisely on a - preferably slightly obliquely projecting - upper frame adapter 7a of the upper frame 7 ,

To optimize the geometry of the triple joint, the axial offset between the first lever counts 13 or second lever 13b on the one hand and the handlebar 14 , ie the respective pivot planes, along the cross-beam 40 (ie axially with respect to the tilt adjustment axis N), which is an axial offset between the fitting 12 or the first joint 11 on the one hand and the second joint 14a ). This axial offset has the advantage that no bending moments on the cross-beam 40 be exercised.

In the second example, the first lever is on the one vehicle seat side 13 on the second fitting part 12b attached, for example, to axially projecting weld warts. The crossbar 40 is - with the tilt adjustment axis N in alignment - on the second fitting part 12b fastened, for example by means of an adapter to the axially projecting weld warts, optionally in addition (or alternatively) to the first lever 13 , On the other side is the crossbar 40 by means of the first joint 11 in the seat frame 10 rotatably mounted. The second lever 13b is at the crossbar 40 attached and corresponds in size and largely in its design to the first lever 13 , Thus form the second fitting part 12b , the first lever 13 , the second lever 13b and the crossbeam 40 a solid construction unit. The handlebars 14 are each by means of the second joint 14a directly at the first lever 13 or second lever 13b articulated while using the third joint 14b at the (in 9 and 10 not shown) upper frame 7 are articulated.

As described above, the embodiment of the vehicle seats is made of DE 20 2008 002 339 U1 known. In the present case, however, the approach, in particular the contacting of the two catch elements 31 and 32 in the event of a crash by a crash-active Sitzflächenschwenkvorrichtung 100 prevented. Furthermore, the arrangement of the inclination fitting differs 12 and the handlebars 13 and 14 , Which are arranged in their arrangement changed to the arrangement described above. Due to the provision of the crash-active Sitzflächenschwenkvorrichtung 100 can the power transmission between the first and the second catch element 31 respectively. 32 , as described above, omitted. However, the arrangement of catching elements 31 . 32 for safety reasons in the event of failure of the crash-active Sitzflächenschwenkvorrichtung 100 , z. B. if the inclination adjustment fitting is not automatically unlocked due to a malfunction, be present in addition, since it does not hinder or affect the function of the same and only in case of failure of the crash-active Sitzflächenschwenkvorrichtung 100 automatically used.

In the event of a crash, a drop in the front seat edge 10 ' of the vehicle seat 1 counteract, but especially in the event of a crash, the front seat edge 10 ' is a crash-active Sitzflächenschwenkvorrichtung, as mentioned above 100 intended. This crash-active Sitzflächenschwenkvorrichtung 100 has two functions. On the one hand, it unlocks the inclination adjustment fitting in a first step 12 (Snap fitting, such as in the WO 00/44582 A1 described or geared fitting with free-pivoting device, such as in the DE 19715 764 C2 described), which between the upper frame 7 and the seat frame 10 acts or otherwise releases the tilt adjustment function of the seat, and on the other hand acts in the front area of the seat frame 10 so that it pivots about the seat frame pivot axis B upwards, ie in the illustration of 5 clockwise. The protective function of the crash-active seat swinging device 100 for an occupant is additionally by a known belt tensioner 101 (please refer 11 ), which ensures that the upper body on the backrest 20 of the vehicle seat 1 is held.

In 12 is next to a three-joint also an actuator 18 with a first operating section 18a and a second operating portion 18b represented, with which the inclination adjustment fitting unlocked by hand and after unlocking the inclination of the seat frame 10 to the upper frame 7 can be changed before the operating lever is released again and the tilt adjustment fitting again seat frame 10 and upper frame 7 in their relative position determines each other

According to a first embodiment of a Sitzflächenschwenkvorrichtung 100 is an airbag 102 Part of the Sitzflächenschwenkvorrichtung 100 , This is in the front area of the vehicle seat 1 between the upper frame 7 and seat frame 10 Normally, the seat frame is tilted 10 an opening of the inclination fitting 12 by hand with the help of the actuator 18 , for which the first operating section 18a projecting forward over the seat in the direction of travel The actuating element 18 is rotatable on the upper frame 7 gelagtert. It is in the case of actuation about a rotation axis 19 according to the representation of 12 slightly pivoted clockwise, causing the tilt adjustment fitting 12 unlocked becomes

In a modified form of the first embodiment, the first operating section is omitted 18a ie the tilt adjustment fitting 12 can not be operated by hand, but only in the event of a crash.

In the event of a crash, the airbag 102 automatically ignited. It opens the incline adjustment fitting during inflation 12 by the second operating section 18b of the actuating element 18 for the inclination adjustment fitting 12 pushes down, which in turn causes the actuator 18 according to the representation of 12 Turned clockwise so that the lock of the fitting is released The airbag 102 pushes in the front area of the seat frame 10 with unlocked tilt adjustment fitting 12 from below against the seat frame 10 and rests against the underlying upper frame 7 from. As a result of the pressure from below, the front seat edge 10 ' under pivoting about the seat frame pivot axis B is raised, at the same time the rear end of the seat frame 10 is lowered (corresponding to the dashed seat representation of 13 ). By lifting the front seat edge 10 ' Damping of the occupant under the safety pool belt can be avoided. Once the pressure of the airbag 102 decreases, ie this coincides in itself, also eliminates the force on the operating section 18b so that the tilt adjustment fitting 12 the assumed inclination locked.

In addition, at the same time as the seat frame 10 the rest 20 , by means of both sides provided backrest fittings 22 on the seat frame 10 attached backrest adapters 16 is mounted, with pivoted about the seat frame pivot axis B. The rest 20 can in a modified version by means of backrests 22 directly on the seat frame 10 be pivotally mounted about the backrest pivot axis C. In both cases, it comes through the pivoting movement of the seat frame 10 in which the backrest 20 taken to an increase in the free space for an occupant. Through the seat belt, the occupant is at the back 20 held, especially when a belt tensioner is provided.

In a further, alternative attachment of the backrest 20 directly on the scissor frame 3 , especially on the upper frame 7 the same, there is no pivoting movement of the backrest 20 so that it does not increase the free space for an occupant in the event of a crash in this embodiment.

In contrast to DE 20 2008 002 339 U1 is - although due to the distorted representation in 12 not shown - the seat frame pivot axis B further displaced backwards, ie it is - contrary to the schematic representation of 5 and 12 - especially behind the middle in the direction of the backrest 20 shifted arranged (see, for example. 11 ). Preferably, it is located below or behind the hip point of an occupant. This rearwardly displaced arrangement reduces, on the one hand, the movement through the seat surface pivoting device 100 On the other hand, the legs of the occupant can be further pulled out of the particularly vulnerable footwell area forces to be applied due to the larger lever arm.

Alternatively to the unlocking of the inclination adjustment fitting described above 12 According to the first embodiment, according to a second embodiment, a predetermined breaking point at any point within the power flow path from the upper frame 7 to the seat frame 10 , for example in the form of a shear pin 103 (see. 13 ), which breaks when a predetermined load limit is exceeded and thus the connection between the upper frame 7 and seat frame 10 via the tilt adjuster and through the airbag 102 the front seat edge 10 ' under pivoting about the seat frame pivot axis B, as by the pivot angle α in 13 indicated, is raised.

Further, as an alternative to an airbag 102 for example, a preloaded spring between the upper frame 7 and seat frame 10 , in particular in connection with a predetermined breaking point in the region of the inclination adjustment device for the purpose of releasing the inclination fitting, be arranged. The use of any other energy storage or actuators that trigger sufficiently fast in the event of a crash are also possible.

14 shows as a third embodiment, an embodiment in which the rear seat edge 10 '' of the seat frame 10 is lowered, whereby - with a corresponding arrangement of the seat frame pivot axis B according to the first embodiment, the front seat edge is raised The lowering takes place by means of a crash-active Sitzflächenschwenkvorrichtung 200 , which is a pyrotechnic (or mechanical) pretensioner 201 in connection with a steel cable serving as a power transmission means 202 a pulling force on the rear end of the seat frame 10 effect. At the same time is the penalty 201 arranged such that when activated in the event of a crash, the inclination fitting (not shown) is unlocked, which can be done for example by a tensile load.

The attachment of the pyrotechnic tensioner as well as the course of the Sahlseils can be modified from the in 14 illustrated arrangement be. In particular, an arrangement is suitable, which allows the steel cord follows movements of the scissors-type frame during normal operation or in the case of a seat height adjustment and / or a tilt adjustment of the seat by hand, if possible without being burdened to train or bending.

According to one not shown in the drawing variant, the seat frame pivot axis is close the front seat edge is arranged so that the front seat edge remains essentially unchanged in height. By lowering the rear seat edge (and essentially the entire seat) can in the event of a crash by this configuration Diving the occupant under the belt can be prevented.

1

vehicle seat

3

scissors-type frame

5

subframe

7

top frame

7a

Top frame adapter

8th

wing

9

seat rail

10

seat frame

10 ''

front seat edge

10 ''

rear seat edge

11

first joint

12

Tilt adjustment

12a

first fitting part

12b

second fitting part

13

first lever

13b

second lever

14

handlebars

14a

second joint

14b

third joint

15

feather

16

backrest adapter

18

actuator

18a

first actuating section

18b

second actuating section

19

axis of rotation actuator

20

rest

22

backrest fitment

31

first catching element

32

second catching element

40

crossbeam

100

crash-active Seat swivel device

101

pretensioners

102

air bag

103

shear pin

200

crash-active Seat swivel device

201

firmer

202

steel cable

A

scissors axis

B

Seat frame pivot axis

C

Back-tilt axis

N

Neigungseinstellachse

α

swivel angle

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3243747 C2 [0002]
• - DE 202008002339 U1 [0003, 0045, 0053]
• WO 00/44582 A1 [0032, 0046]
• - DE 4436101 A1 [0032]
• DE 19715764 C2 [0046]

Claims (14)

Vehicle seat, in particular commercial vehicle seat, with a scissors frame ( 3 ), a thereto with a pivot axis (B) hinged seat frame ( 10 ), which at least in the event of a crash relative to the scissors frame ( 3 ) is variable in its inclination, characterized in that a crash-active Sitzflächenschwenkvorrichtung ( 100 ; 200 ) is provided, which in the event of a crash the seat frame ( 10 ) relative to the scissors frame ( 3 ) while raising the front seat edge ( 10 ' ) and / or lowering the rear seat edge ( 10 '' ) pivots. Vehicle seat according to claim 1, characterized in that the pivot axis (B) of the seat frame ( 10 ) in the seat longitudinal direction below the hip point of an occupant or further to the rear, in the direction of the backrest ( 20 ), is arranged. Vehicle seat according to one of the preceding claims, characterized in that the crash-active seat surface pivoting device ( 100 ) an airbag ( 102 ), which between the seat frame ( 10 ) and the scissors rack ( 3 ) is arranged, wherein he in the case of release the seat frame ( 10 ) relative to the scissors frame ( 3 ) is pivoted about the pivot axis (B). Vehicle seat according to one of claims 1 or 2, characterized in that the crash-active Sitzflächenschwenkvorrichtung ( 200 ) a penalty ( 201 ), which between the seat frame ( 10 ) and the scissors rack ( 3 ) is arranged, wherein he in the case of release the seat frame ( 10 ) applying a tensile force relative to the scissors-type frame ( 3 ) is pivoted about the pivot axis (B). Vehicle seat according to one of the preceding claims, characterized in that a three-jointed steering with at least one inclination adjustment fitting ( 12 ) is provided, which via an actuating element ( 18 ) is unlockable, wherein the crash-active Sitzflächenschwenkvorrichtung ( 100 ; 200 ) in the event of a crash the inclination fitting ( 12 ) unlocked. Vehicle seat according to claim 5, characterized in that the actuating element ( 18 ) an actuating portion ( 18b ) for automatic unlocking of the inclination adjustment fitting ( 12 ) in the event of a crash. Vehicle seat according to claim 5 or 6, characterized in that the actuating element ( 18 ) a first operating section ( 18a ) for the tilt adjustment of the seat frame ( 10 ) by hand, and for automatic unlocking of the inclination adjustment ( 12 ) in the event of a crash, the crash-active Sitzflächenschwenkvorrichtung ( 100 ) to a second operating section ( 18b ) acts. Vehicle seat according to one of claims 5 to 7, characterized in that the actuating element ( 18 ) about a rotation axis ( 19 ) is rotatable, wherein a first operating portion ( 18a ) for the tilt adjustment of the seat frame ( 10 ) by hand in a first direction and a second operating portion ( 18b ) for automatic unlocking of the inclination adjustment fitting ( 12 ) extends in the event of a crash in a second, different from the first direction direction. Vehicle seat according to one of claims 5 to 8, characterized in that the actuating element ( 18 ) on the upper frame ( 7 ) is stored. Vehicle seat according to one of the preceding claims, characterized in that a belt tensioner ( 101 ) is provided. Vehicle seat according to one of the preceding claims, characterized in that the seat frame ( 10 ) on the one hand directly on the scissor frame ( 3 ) and on the other hand by means of at least one Dreigelenks with the scissors frame ( 3 ) is pivotally connected, wherein by the crash-active Sitzflächenschwenkvorrichtung ( 100 ; 200 ) at least in the event of a crash of the seat frame ( 10 ) changing the arrangement of the three-jointed body by raising the front seat edge ( 10 ' ) and / or lowering the rear seat edge ( 10 '' ) pivots. Vehicle seat according to claim 11, characterized in that in the three-jointed steering at least one inclination adjustment fitting ( 12 ) is provided, which a rotation axis ( 19 ), and which between on the one hand the seat frame ( 10 ) or the scissors rack ( 3 ) and on the other hand a handlebar ( 14 ) of the triple-joint is effective, the crash-active Sitzflächenschwenkvorrichtung ( 100 ; 200 ) in the event of a crash the inclination fitting ( 12 ) unlocked. Vehicle seat according to claim 11 or 12, characterized that at least one predetermined breaking point in the region of Dreigelenks is provided. Vehicle seat according to one of the preceding claims, characterized in that the scissor frame ( 3 ) a first catch element ( 31 ) and the seat frame ( 10 ) a second catch element ( 32 ), which are normally without interaction and in the event of a crash and failure of the crash-active Sitzflächenschwenkvorrichtung ( 100 ) or misuse due to a torque which by means of the backrest ( 20 ) on the seat frame ( 10 ), approach each other and then work together to create another path for the power flow.