DE102005006846A1 - Headrest for a seat with a guide sleeve, headrest for a seat with a power means, headrest for a seat with a sensor means, headrest for a seat with two sliding rods and seat with a headrest according to the invention - Google Patents

Abstract

The present invention relates to a headrest for a seat, in particular of a motor vehicle, comprising at least one sliding rod with a loose end and a guide sleeve having a first end and a second end into which the sliding rod immersed, wherein the headrest by means of the sliding rod to a maximum displacement is reversibly displaceable from a basic position to an end position, wherein the loose end of the sliding rod is arranged in the basic position in the region of the first end of the guide sleeve and in the end position in the region of the second end of the guide sleeve.

Description

The The present invention relates to a headrest for a seat, in particular a motor vehicle, the at least one sliding rod with a loose end and a guide sleeve with a first end and a second end into which the sliding rod dips, with the headrest by means of the displacement rod by a maximum displacement of a basic position in an end position reversibly displaced is. Furthermore, the present invention relates to a headrest for a Seat with a power means, a headrest for a seat with a sensor means, a headrest for one Seat with two sliding rods and a seat with a headrest according to the invention.

Headrests of Vehicle seats, in particular motor vehicle seats, are safety components, the above the lifetime of the vehicle must have great stability to the Loads, especially in a crash to withstand. You should the size of one User customizable and therefore be particularly height adjustable to the Support a user's head in a crash, and continue to they maximize the user To provide comfort.

Out These requirements are contradictory to the construction of Headrests. To the height adjustment to enable the need Slide bar or the sliding bars of the headrest game in terms of their leadership. One too big Game influences the stability the headrest but negative. Furthermore should the displacement force required to move the headrest as far as possible be constant. Size Tolerances in track gauge, however, lead to uneven columns, through which the displacement force is uneven. Great game and big Spurmaßtoleranzen continue to lead to rattle the headrest, especially when driving over uneven terrain. Furthermore, the height adjustment must be securely locked so they can withstand heavy load does not solve. To secure the lock, power means are used, in particular Feathers. Too strong a spring force makes it difficult to move the Headrest. There is also at big Stress the risk that the headrest will twist and get hurt the lock releases.

Farther exist fundamentally Requirements for components for Vehicles, especially for Motor vehicles: Due to the diverse requirements and functions In the vehicle, the small available space should be optimal be used. The production and assembly should be as far as possible with conventional Means be fast, easy and inexpensive. And vehicle components should be light.

The publication DE 195 32 260 A1 discloses a rear seat with a height-adjustable headrest whose sliding bar is guided in a guide tube. The sliding rod is by means of a spring clip, which is arranged in the region of a guide sleeve and engages in notches of the sliding rod, locked and automatically unlocked by means of an electromagnet. To the sliding rod, a compression spring is arranged spirally, on the one hand below the guide sleeve and on this and on the other hand on a compression spring driver, which is arranged at the lower end of the sliding rod, supported. Contrary to the force of the compression spring headrest can be pushed out of the backrest of the seat. The disadvantage is that the length of the guide tube and the displacement rod at least by the length required by the spring and the compression spring must be longer than is required due to the maximum displacement of the headrest.

The publication DE 199 31 745 B4 discloses a device for retracting a head restraint rod in which the head restraint rod is disposed laterally of a slider. The slider is vertically movable and mounted against the force of a scroll spring on a base plate. The height adjustment can be locked by means of an electromagnet by a latching projection engages in recesses of the slider. The lock is located in the region of the lower end of the sliding bar and the sliding bar must be longer than required for the slider when the headrest is extended, as required by the maximum displacement of the headrest.

task The present invention is therefore a modular to the seat structure the back of a seat, preferably a motor vehicle seat, customizable, height-adjustable headrest to create, in which the available space optimally is used, which is very user-friendly and very safe, and the moreover light, quiet guided, easy to manufacture and easy to install, and is very cost-effective.

The object is achieved with a headrest for a seat, in particular a motor vehicle, comprising at least one sliding rod with a loose end, and a guide sleeve having a first end and a second end into which the sliding rod dips, wherein the headrest means of the sliding rod is reversibly displaceable by a maximum displacement from a basic position to an end position, wherein the loose End of the displacement rod in the basic position in the region of the first end of the guide sleeve and in the end position in the region of the second end of the guide sleeve is arranged.

Of the Specialist understands that the length the sliding rod is influenced by the seat structure. The Length of However, shift rod according to the invention is no longer than by the maximum displacement is required, so no unnecessary space for height adjustment and in particular for the locking of the headrest is needed. Therefore, according to the invention the length the guide sleeve substantially equal to the maximum displacement of the headrest.

There no unnecessary Space for the height adjustment needed will, can Seats with small backrests can be realized, which are far extendable headrests which are due to the low available Space especially for rear rows of motor vehicles are suitable.

By the guide sleeve is the sliding bar is protected within the seat structure. The Guide sleeve is preferably made of a plastic, in particular as an extruded profile, and therefore very easy and inexpensive. The guide sleeve allows a modular concept that provides various headrest interchangeable functions in the headrest To arrange area of the guide sleeve.

Farther is the headrest easier due to the guide sleeve adaptable to different seating structures.

Farther are caused by moving noise when moving the headrest the guide sleeve damped.

Prefers is the sliding bar by means of a first holding means and a second holding means disposed within the seat structure. The guide sleeve as well the holding means represent an assembly, preferably within the seat structure is arranged. Particularly preferred is the distance the cross struts of the seat structure from each other at least as large as the needed maximum displacement of the headrest, allowing the assembly between the cross struts can be arranged. This will be the cross struts not weakened by recesses, the for the sliding rods or the guide sleeve provided have to be. Furthermore This makes assembly very fast and easy.

Of the A person skilled in the art understands that an embodiment is also possible in the guide sleeve through led a cross strut of the seat or at least partially formed by this, but if necessary to a weakening the seat structure leads and at least in production and assembly is more expensive.

Preferably At least one of the two holding means is elastic, especially Preferably, both holding means are elastic, whereby also the Assembly is simplified. Furthermore This ensures that the assembly under changing load does not rattle.

at the planning of the seat, the cross braces are preferably provided so that the length of the Guide sleeve on the one hand essentially corresponds to the maximum displacement of the headrest and on the other hand fits between the cross struts. The assembly is then mountable by one or both retaining means on the seat structure be arranged and then the guide sleeve on the or is arranged between the holding means, or by the guide sleeve with the holding means arranged between the cross braces, preferably pressed, is. It may possibly even on an additional Attaching the retaining means, for example by means of screws or Rivets, dispensed so that the assembly is very simple and fast possible is.

on the other hand can provide a headrest very quickly and easily for a planned seat, for example, retrofitted, be by the length adapted to the guide sleeve is, wherein the maximum displacement in this embodiment by the distance between the cross struts of the seat is limited.

In a preferred embodiment includes the guide sleeve Guide element which is arranged at the loose end of the sliding rod. The guide element is preferably so to the extent adapted to the guide sleeve, that ensures sufficient play for moving the headrest is, wherein the displacement rod and in particular the loose end of the Sliding rod controlled along the guide sleeve is guided.

To ensure that the headrest is evenly displaceable and does not drop uncontrollably when inserting the headrest into the seat, the headrest preferably comprises a damping means for damping the displacement of the headrest. The damping means is preferably a rubber disc, for example of silicone, and is particularly preferably arranged in the region of the guide sleeve, ie between or at the first end of the guide sleeve and the or at the second end of the guide sleeve. The damping means is particularly preferably arranged on the guide element. Also particularly preferred is the damping means on one of the holding arranged medium and formed by a membrane, wherein the guide sleeve are designed as a cylinder and the guide element as a piston, so that the damping takes place pneumatically. In this embodiment, the shifting is very uniform and very quiet possible.

Preferably includes the headrest a force. To a uniform adjustment the headrest to ensure, a roll spring is preferably used. A scroll spring is small and cost-effective and can essentially anywhere, for example within the seat structure, and arranged, for example also be bent. Preferably, the force of the force acts when moving the headrest essentially along the displacement bar.

As well Preferably, an electric actuator is used as the force means, for example, to allow automatic insertion of the headrest.

Especially Preferably, the force means is arranged in or on the guide element and interacts with the seat structure of the seat non-positively. This is arranged the power means in the region of the guide sleeve.

Prefers includes the headrest a locking means for locking the displacement of the headrest. The headrest is by means of the force against the force of the locking means preferably pulled towards the home position. To one is to ensure secure locking the locking means preferably a cam, which in a recess attacks. In a preferred embodiment, the locking means on the guide element arranged and engages in recesses, which are arranged on the guide sleeve are a. In this embodiment Locking is very safe, especially compared to a Locking with notches in the sliding bar. Also required such a locking no extension of the sliding rod, but is in the area of the guide sleeve, d. H. in the area necessary to realize the maximum displacement needed anyway becomes possible.

Also Preferably, the headrest comprises a Unlocking means, by means of which the locking means unlocked is, especially preferred automatically. For automated operation of the Unlocking means, an electrical actuator is preferably used, or a pneumatic cylinder. To unlock unwanted when strong To avoid stress, especially in a crash, will be sufficient Empty stroke between the actuation the unlocking and unlocking provided. The expert understands that a manual unlocking is possible, for example by means of a Bowden cable. Particularly preferred is an unlocking, in particular a manual unlocking, for example by means of a Bowden cable, at a folding seat operated by the back of the seat, so that the headrest is retracted by the force of the power means when folding the seat and therefore the flaps are not obstructed.

A automatic unlocking allows this Retracting the headrest for example, when the reverse gear is inserted, so that the view is improved when reversing.

The Headrest according to the invention can be handled as an assembly and is therefore in terms of storage and installation very cost-effective. It allows a modular adaptation to different seating structures, and the Retrofitting Sitting with a height-adjustable Headrest. Farther can the headrest modular with either an automatic feeder or a manual feeder Feeder be provided, or the unlocking can be automatic or be provided manually, so that the headrest semi-automatic or fully automatic can be provided adjustable. The handling of the headrest is very easy. The power and the damping means can so be coordinated with each other, that for a user a uniform and pleasant feeling of adjustment established. The locking is very safe possible. The functions of the feeder, the damping, the noise reduction, the locking and unlocking are preferably carried out in the headrest according to the invention all in the area of the guide sleeve and are in different embodiments modular exchangeable. Furthermore is by using the guide sleeve of the Space within the seat structure optimally used and it is not unnecessary extension the displacement bar, for example, for locking the height adjustment the headrest, required.

The Task is still solved with a headrest for one Seat, in particular a motor vehicle, the at least one sliding rod comprises, the loose end slidable in a shift range is, which comprises a force means by means of the sliding rod reversible along the shift range from a home position to an end position is displaceable, and their displacement by means of a locking means is lockable, wherein the force means is a scroll spring whose second end is arranged at the loose end of the sliding rod, and its first end frictionally cooperates with the seat structure of the seat, and wherein the locking means on the seat structure of the seat above the sliding area is arranged and cooperates frictionally with the displacement rod.

Of the One skilled in the art understands that the displacement range of this solution is the Task the area of the guide sleeve of first solution corresponds to the task, and therefore essentially the length of the has maximum displacement.

Also in this embodiment is the length the sliding bar according to the invention no longer than by the maximum Displacement is required, so that also no unnecessary space for the height adjustment the headrest, especially for their lock, needed becomes. In this embodiment is not a guide sleeve imperative, so that the headrest can be produced very inexpensively is, with the scroll spring, especially when fully extended is, but not protected is. Preferably, the headrest a damping element on, which interacts directly with the scroll spring, for example by means of a rubber disc, for example made of silicone, which is easy and cost-effective is.

The Use of the scroll spring is advantageous as it allows for unwinding in the substantial constant force requires, so that the shifting the headrest very evenly possible.

The following versions apply to both solutions the task.

Especially Preferably, the displacement of the headrest from the basic position in the end position against the force of the force means, so that the Inserting the headrest for the User is easy.

In a particularly preferred embodiment includes the headrest two sliding bars. The use of two sliding rods has the advantage that the sliding rods with conventional Means are very simple, fast and inexpensive to produce. Prefers are the sliding rods made of a metal or a metal alloy manufactured. Particular preference is given to bends of the sliding rods, for example, for producing a bend of the headrest, by means of produced by a CNC bending machine.

Preferably becomes the headrest at least partially made by molding over the displacement rods, in particular from a plastic. The headrest is then very torsionally stiff and has a favorable one Load distribution on. The danger that the locking of the headrest at greater Load, especially in a crash, unlocked due to torsion Therefore, when using such a headrest is considerable reduced.

Besides, has the production of a headrest with two sliding rods the advantage that the sliding rods a high parallelism and therefore a gauge with have very tight tolerances. As a result, bearing gaps the leadership of the handrails in the backrest of a seat. The force needed to adjust the headrest is therefore over the life of the seat is substantially constant and the adjustment of the headrest very evenly possible.

Farther are the space conditions changed by the use of two sliding rods, so that, for example, a headrest with a larger cavity is manufacturable, so that the view is improved to the rear, or the additional space can for used a tilt and / or depth adjustment of the headrest become.

In a preferred embodiment, which also solves the task, includes the headrest a sensor means for detecting the head position of a user, wherein the sensor means is an area sensor, particularly preferred is a force-sensitive area sensor. This allows the Location of the head of a person using the seat very accurately detected and preferably set automatically. Or the user is at least made aware of this by means of an advertisement that he has the headrest adjust, and even how he should adjust the headrest.

One force-sensitive surface sensor is a substantially flat extending, force-sensitive sensor, in and / or on a preferably flexible carrier material is applied. The sensor is therefore due to the pressure of the head of the user on the headrest actuated. The person skilled in the art understands that other sensors can also be used, for example, contactless Sensors.

Especially is preferred as an area sensor a flexible, thinner area sensor used, for example, an Elektex the company ElekSen and the Company IEE, Lusense, Luxembourg, or there will be a sensor on and / or introduced into a flexible, thin plastic carrier is, for example, a Flexible Printed Circuit (FPC) used.

In a preferred embodiment, which also achieves the object, the headrest comprises two displacement rods, wherein it comprises an electrical component, and wherein the displacement rods for supplying voltage to the component can be acted upon by an electrical voltage. As a result, no additional cables must be guided in the headrest, but the sliding rods are at least partially made of a conductive material and are used for power management. Particularly preferably, the sliding rods are made of a metal or a metal alloy, electrically contacted by means of sleeves or springs and preferably with a small applied voltage. Since the track gauge between the slide bars can be made with small tolerances when using two slide rods, the use of sleeves or springs by means of which the slide rods are electrically contacted, is easily possible.

Especially Preferably, the electrical component is a sensor means for detecting the head position of a user, particularly preferably an area sensor, very particularly preferably a force-sensitive area sensor.

Also Preferably, the electrical component is an electric drive, preferably for automatic inclination and / or depth adjustment of Headrest.

Especially when using a force-sensitive surface sensor as a sensor means, For example, a Elektex, is also the inclination and / or depth adjustment detectable and displayable on a display, in particular because such a area sensor both the location and the amount of force exerted on him detected. When using the sliding bars both for power supply a sensor means as well as an electric drive is the Inclination and / or depth adjustment also automatically adjustable.

When contactless Sensor means preferably light sensors are used, for example Infrared sensors or ultraviolet sensors, as radiated by the Light of a light sensor to the user at the same time the presence a sensor means in the headrest is displayed.

A headrest with such a sensor means is preferred in unused seat adjusted so that the comfort worsens and the headrest is "uncomfortable", so that the next User of the seat the headrest at his head height adjust in order to use the seat comfortably. Especially preferred is the headrest automatically reset when the next user uses the seat. In this case, the sensor, in particular a light sensor, also used as a "seat occupancy sensor" to record whether the seat is being used by a user.

One automatic adjustment of the headrest, in particular the height of the headrest, is therefore advantageous because in an accident with incorrectly adjusted headrest the strain, especially in the neck area, causes considerable damage to health can be.

A headrest with a sensor means is therefore very safe and very easy for the user adjustable, or even set automatically. When using the sliding rods as electrical conductor for the power supply of the electrical component of the headrest can the wiring and therefore also the straight with a height-adjustable headrest possibly large Cabling effort can be saved, so that the headrest faster, easier and cheaper to produce and easier.

One Another object of the present invention is a vehicle seat, especially rear seat, comprising a headrest according to the invention. Of the Installation of a headrest in a seat according to the invention is fast, easy and inexpensive possible. Of the inventive seat is very safe and user friendly adjustable.

in the Following, the invention will be described with reference to figures. The Figures are merely exemplary and limit the general inventive concept not a.

1 shows a headrest according to the invention.

2 shows a section of the back of a vehicle seat with an embodiment of a headrest according to the invention.

3 shows a section of the backrest of a vehicle seat with a further embodiment of a headrest according to the invention.

4 shows an embodiment of the locking of a headrest according to the invention.

5 shows a further embodiment of the locking of a headrest according to the invention.

6 shows a further embodiment of the locking of a headrest according to the invention.

7 - 9 show a further embodiment of the locking and unlocking and a guide sleeve of a headrest according to the invention.

10 shows schematically the contacting of a headrest according to the invention with an electrical component and illustrates the automatic adjustment of a headrest according to the invention.

1 shows a headrest according to the invention 1 , To support the neck area of a user sufficiently, is the headrest 1 to the back bent L-shaped, so that the back even after moving to the end position E at least partially through the headrest 1 is covered.

2 shows a section of the back of a vehicle seat with an embodiment of a headrest according to the invention 1 , Representation a shows the displacement bar 2 which is bent so that it has two legs 221 . 222 which are substantially parallel to each other and both within the seat structure 4 of the seat are arranged. A U-shaped area between the two thighs 221 . 222 forms together with a cushion body and / or a carrier body, the headrest 1 , where the 2 only the sliding bar 2 the headrest shows. One of the two thighs 221 is with his loose ends 20 in a guide sleeve 3 guided, between two cross struts 40 . 41 the seat structure 4 by means of a first holding means 50 and a second holding means 51 is arranged. The loose end 20 the sliding bar 2 is in the guide sleeve 3 guided and in a shift area 200 displaceable. The length of the guide sleeve 3 is substantially equal to the maximum displacement MV of the headrest 1 , The headrest 1 is in the basic position G and the loose end 20 the sliding bar 2 is therefore in the area of the first end 30 the guide sleeve 3 arranged. In Carstellung b is the guide sleeve 3 only partially drawn, so that in the guide sleeve 3 guided thighs 221 the sliding bar 2 is also visible. Representation c shows a guide element 7 At a loose end 20 the sliding bar 2 is arranged. The guide element 7 has a damping agent 8th on, here a rubber disc, as well as a Kraftmittel 6 , here a scroll spring, by means of a socket 12 in the guide element 7 is arranged so that the damping means 8th as well as the power means 6 in the area of the guide sleeve 3 are arranged. The following are the terms force means 6 and scroll spring used synonymously. The scroll spring 6 is with her second end 60 with the guide element 7 connected, being their first end 60 with the holding means 50 is connected and non-positively with the seat structure 4 interacts. In illustration c is the scroll spring 6 at least partially by a screw 11 obscured, while representation d the screw 11 not showing. The guide sleeve 3 has a first end 30 and a second end 31 and is essentially as long as a maximum displacement MV of the headrest 1 , The sliding bar 2 the headrest 1 is in the basic position G of the headrest 1 shown in the loose end 20 the sliding bar 2 in the area of the first end 30 the guide sleeve 3 is arranged.

The following versions also apply to the following figures.

The headrest 1 has instead of a sliding rod 2 with two in the seat structure 4 guided thighs 221 . 222 in a further embodiment, a sliding rod 2 with one in the seat structure 4 guided thigh 221 for example, the center of the headrest 1 is arranged, or in a further embodiment, two displacement rods 2 . 2 ' each with one in the seat structure 4 guided thigh 221 on.

Instead of using a scroll spring 6 is also an electric actuator for automatic extension of the headrest 1 usable.

3 shows a section of the back of a vehicle seat. Representation a shows the shift range 200 in which the loose end 20 the sliding bar 2 is displaceable. The headrest 1 is in the end position E, as the sliding rod 2 along its entire displacement area 200 is shifted by the maximum displacement MV, and is not visible here. From the sliding bar 2 is therefore only the loose end 20 visible, noticeable. The power means 6 is a scroll spring, which by means of an adapter at its second end 61 at the loose end 20 the sliding bar 2 is arranged. The scroll spring 6 is by means of a socket 12 in a housing 14 arranged and by means of a screw 11 that the case 14 with the seat structure 4 of the seat joins, with their first end 60 non-positively with the seat structure 4 connected to the seat. The scroll spring 6 acts directly with a damping agent 8th together, here a rubber disc, which means a housing cover 140 is covered. Representation b shows the arrangement of the scroll spring 6 in the case 14 , Representation c shows the arrangement of the damping means 8th as well as a detent spring 13 That when the headrest 1 is arranged in the basic position G, with the adapter 15 who is the scroll pen 6 with the loose end 20 connects, interacts.

A locking means is in the 3 not visible because it is above the shift range 200 is arranged.

4 shows in the representations a-e an embodiment of the locking of a headrest according to the invention 1 , The unlocking takes place by means of an electrical Entriegelungsaktuator as unlocking 10 automatically, or by means of an additionally provided actuation 19 manual, with manual operation 19 on the side of one of two headrest sleeves 100 is arranged, in which the thighs 221 . 222 the sliding bar 2 through a crossbeam 41 the seat structure 4 are guided. The following are the terms unlocking 10 and unlock actuator used synonymously. The crossbeam 41 forms the top edge of the seat. The sliding bar 2 is not inside the headrest sleeves 100 displaceable. The unlocking actuator 10 is essentially midway between the thighs 221 . 222 the sliding bar 2 arranged. The locking means 9 is a slider that works with the sliding bar 2 frictionally cooperates. The following are the terms locking means 9 and slider used synonymously. The manual operation is on the slide 9 arranged and therefore causes essentially no additional costs. To prefabricate the lock as a modular locking assembly in particular and in the seat structure 4 to arrange, the locking assembly has a cover 400 on, on which the headrest sleeves 100 , the unlocking actuator 10 and the slider 9 are arranged. To unlock the displacement of the headrest 1 acts the Entriegelungsaktuator 10 with the slider 9 together.

The damping of moving the headrest 1 is preferably carried out by means of a damping agent 8th , s. 2 and 3 in that particularly preferred in the region of the guide sleeve 3 or on a holding means 50 . 51 is arranged. Therefore, the function of cushioning does not need headrest sleeves 100 be provided so that the construction of the sliding rods 2 , in particular the radii for the bending of the displacement rods 2 outside the fief of the seat, is more freely selectable. In addition, the damping by means of the damping means 8th more exactly possible.

5 shows a further embodiment of the lock. In this embodiment, the unlocking actuator 10 to unlock the slide 9 not on the cover 400 but the side of the cover 400 on the seat structure 4 is arranged. Also in this embodiment is a manual operation 19 of the slider 9 additionally provided.

6 shows a further embodiment of the lock. The locking means 9 is one by means of bolts 16 below the cover 400 provided lever, with the sliding bar 2 frictionally cooperates and by means of a Bowden cable 10 is manually operated as unlocking. The following are therefore the terms unlocking 10 and Bowden cable and locking means 9 and levers used synonymously. The headrest 1 is additionally by means of a manual operation 19 attached to one of the headrest sleeves 100 is arranged, unlocked. Representation a shows the arrangement of the locking assembly in the cross member 41 the seat structure 4 , which forms the top edge of the seat, while illustration b shows the locking assembly from below and without the seat structure 4 shows. Representation b also shows the arrangement of the guide sleeve 3 on the sliding bar 2 , By operation of the Bowden cable 10 becomes the lever 9 operated and the displacement of the headrest 1 unlocked.

7 - 9 show a further embodiment of the locking or unlocking and a guide sleeve 3 a headrest according to the invention 1 wherein in the embodiments of the illustrations 7a and 8a the release each manually by means of a Bowden cable 10 '' and a sliding key 10 ' as unlocking means 10 is pressed, whereas in the representations 7b and 8b the unlocking automatically by unlocking actuator 10 ''' and the sliding key 10 ' as unlocking means 10 is operable.

presentation 7a shows the sliding key 10 ' as well as the Bowden cable 10 compared to a notched sliding bar 2 , presentation 7a also shows a holder 130 for the storage of the Bowden cable 10 on the guide sleeve 3 ,

presentation 7b and 7c show a guide sleeve 3 , here a cylinder, with the guide sleeve 3 recesses 33 in which the locking means 9 , here a cam, engages. The following are the terms locking means 9 and cams used synonymously. When moving the sliding key 10 ' becomes the cam 9 in the guide sleeve 3 pushed in, leaving the guide element 7 , s. 9 , in the guide sleeve 3 is displaceable, so the headrest 1 is displaceable.

The in the 7 - 9 illustrated locking or unlocking by means of the additional sliding key 10 ' and in the recess 33 engaging cam 9 is considerably safer than the locking by means of the notched sliding bar 2 ,

8th shows a section of a backrest of a seat according to the invention. Visible is a section of the guide sleeve 3 by means of holding means 50 . 51 between cross members 40 . 41 the seat is arranged, in the region of the upper edge of the seat forming cross member 41 , Illustration a shows the Bowden cable 10 '' by means of the holder 130 on the guide sleeve 3 is arranged and with the sliding key 10 connected in grooves 34 the guide sleeve 3 is guided. The sliding key 10 ' and the Bowden cable 10 '' form the unlocking means 10 , where the sliding key 10 ' when pulling the Bowden cable 10 '' is pressed. Illustration b shows in place of the Bowden cable 10 '' a Entriegelungsaktuator 10 ''' standing at the seat structure 4 is arranged and the sliding key 10 ' actuated.

9 shows the first holding means 50 a headrest according to the invention 1 , as well as the guide element 7 , The damping agent 8th is on the holding means 50 arranged and through a membrane with multiple inflow channels 80 and an outflow channel 81 educated. In presentation 9a is the Ver handling grip 2 visible, at the loose end 20 the guide element 7 is arranged, in this embodiment, the guide sleeve 3 acts as a piston. Visible are still the locking means 9 as well as the scroll spring 6 , The damping takes place pneumatically in this embodiment. The first holding means 50 is like in presentation 9b visible by means of a screw 11 on the seat structure 4 intended.

10 shows schematically a headrest according to the invention 1 that is an electrical component 18 includes and clarifies the automatic adjustment of the headrest 1 , The headrest 1 includes two sliding bars 2 . 2 ' , To the power supply 18 ' the electrical component 18 are the two sliding rods 2 . 2 ' subjected to an electrical voltage, preferably with a low voltage, more preferably with a voltage in the range 2-24V, wherein one of the two displacement rods with the mass 180 '' the seat or the vehicle is contacted. The electrical component 18 In a preferred embodiment, a sensor means, for example a force-sensitive area sensor or a light sensor. Moving the sliding bars 2 . 2 ' takes place by means of a force 6 used electric actuator 180 , In a preferred embodiment, the electric actuator 180 on the guide element 7 arranged. Also preferred is the headrest 1 another electric actuator, for example, an additional tilt adjustment and / or depth adjustment of the headrest 1 to carry out. The contact 18 ' . 180 ' the electrical component 18 or of the / the electrical actuators 180 ' takes place preferably by means of sliding contacts 17 For example, sleeves or spring contacts. Most preferably, the guide sleeve 3 electrically conductive rails or is made of an electrically conductive plastic, for example, a carbon fiber offset plastic.

Representation c clarifies the automatic setting of an example with a light sensor 18 equipped headrest 1 , Is the headrest 1 at the right height, the light sensor delivers 18 a "correct" signal The representation c shows the headrest 1 in the retracted basic position G, in the extended by the maximum displacement MV end position E and in an intermediate position. In the intermediate position, the light sensor is in position B and provides the "correct" signal while in position A of the light sensor, that is the end position E of the headrest 1 , and C of the light sensor, that is the basic position G of the headrest 1 , provides a "false" signal, for example, adjustment is possible by the headrest 1 is set centrally between two "wrong" positions, or by the headrest 1 is shifted by a defined distance from the maximum displacement MV.

1

headrest

100

Headrest sleeve

2, 2 '

movement rod

221 222

leg the sliding bar

20

lot End of the sliding bar

21

The the loose end of the displacement area opposite end

200

displacement range

MV

maximum displacement

3, 3 '

guide sleeve

30 31

first and second end of the guide sleeve

33

recess

34

groove

4

seat structure

40 41

Cross member of the seat structure

400

cover

50, 51

first and second holding means

6

power means

60 61

first and second end of the force

7

guide element

8th

damping means

80

inflow

81

outflow

9

locking means

10

unlocking

10 '

shift key

10 ''

Bowden

10 '' '

(Electric) unlocking actuator

11

screw

12

Rifle

13

detent spring

130

bracket for the storage of the Bowden cable

14

casing

140

housing cover

15

adapter

16

Rivet, bolt

17

shell

18

electrical Component, sensor means

180

electrical Component, electric drive

18 ', 180'

contact the el. Component, sliding contact, sleeve, spring contact

19

manual activity of the locking means

G

basic position

e

end position

A, B, C

Headrest positions

Claims (15)

Headrest ( 1 ) for a seat, in particular a motor vehicle, which has at least one sliding rod ( 2 ) with a loose end ( 20 ) and the one Guide sleeve ( 3 ) with a first end ( 30 ) and a second end ( 31 ) into which the sliding rod ( 2 ), whereby the headrest ( 1 ) by means of the sliding rod ( 2 ) is reversibly displaceable by a maximum displacement path (MV) from a basic position (G) to an end position (E), characterized in that the loose end ( 20 ) of the sliding bar ( 2 ) in the basic position (G) in the region of the first end ( 30 ) of the guide sleeve ( 3 ) and in the end position (E) in the region of the second end ( 31 ) of the guide sleeve ( 3 ) is arranged. Headrest according to claim 1, characterized in that the sliding bar ( 2 ) by means of a first holding means ( 50 ) and a second holding means ( 51 ) within the seat structure ( 4 ) is arranged. Headrest according to one of the preceding claims, characterized in that at least one of the two retaining means ( 50 . 51 ) is elastic. Headrest ( 1 ) according to one of the preceding claims, characterized in that the guide sleeve ( 3 ) a guide element ( 7 ), which at the loose end ( 20 ) of the sliding bar ( 2 ) is arranged. Headrest ( 1 ) according to one of the preceding claims, characterized in that it comprises a damping means ( 8th ) for damping the displacement of the headrest ( 1 ). Headrest ( 1 ) according to one of the preceding claims, characterized in that it comprises a force means ( 6 ). Headrest ( 1 ) according to one of the preceding claims, characterized in that the force means ( 6 ) in or on the guide element ( 7 ) is arranged. Headrest ( 1 ) according to one of the preceding claims, characterized in that it comprises a locking means ( 9 ) for locking the displacement of the headrest ( 1 ). Headrest ( 1 ) according to one of the preceding claims, characterized in that it comprises an unlocking means ( 10 ), by means of which the locking means ( 9 ) is unlocked, preferably automatically. Headrest ( 1 ) for a seat, in particular a motor vehicle, which has at least one sliding rod ( 2 ) whose loose end ( 20 ) in a shift area ( 200 ), which is a force means ( 6 ), which by means of the sliding rod ( 2 ) along the displacement area ( 200 ) is reversibly displaceable from a basic position (G) to an end position (E), and the displacement thereof by means of a locking means ( 9 ) is lockable, characterized in that the force means ( 6 ) is a scroll spring whose second end ( 61 ) at the loose end ( 20 ) of the sliding bar ( 2 ) and its first end ( 60 ) frictionally with the seat structure ( 4 ) of the seat, and in that the locking means ( 9 ) on the seat structure ( 4 ) of the seat above the displacement area ( 200 ) is arranged, and with the displacement rod ( 2 ) cooperates non-positively. Headrest ( 1 ) according to one of the preceding claims, characterized in that the displacement of the headrest ( 1 ) from the basic position (G) to the end position (E) against the force of the force means ( 6 ) he follows. Headrest ( 1 ) according to one of the preceding claims, characterized in that it comprises two displacement rods ( 2 . 2 ' ). Headrest ( 1 ) for a seat, in particular a motor vehicle, in particular according to one of the preceding claims, characterized in that it comprises a sensor means ( 18 ) for detecting the head position of a user, and that the sensor means ( 18 ) is an area sensor, preferably a force-sensitive area sensor. Headrest ( 1 ) for a seat, in particular a motor vehicle, in particular according to one of the preceding claims, characterized in that it comprises two displacement rods ( 2 . 2 ' ) comprises that it comprises an electrical component, and that the displacement rods ( 2 . 2 ' ) can be acted upon by the voltage supply of the electrical component with an electrical voltage. Vehicle seat, in particular rear seat, characterized in that it has a headrest ( 1 ) according to one of the preceding claims.