The invention initially relates to a
with adjustment mechanism for
Motor vehicles, for example rear seat head restraint, with an angular position
relative to a backrest
a motor vehicle seat on which the headrest is attached, adjustable
and in which preferably a height adjustability is given
is, with the headrest
two mounting brackets
which has about
a bracket length
are inserted into holder receptacles, the holder receptacles further
the angular position can be pivoted together about a pivot axis.
Headrests for motor vehicles of the type in question are known. For example, driver and front passenger seats have headrests which, in addition to a height adjustment, have an inclination adjustment, so that the height and angle of the headrest can be adapted to the body size and the seating position of the person taking up the seat. Furthermore, rear seat headrests are also known, which are adjustable in their angular position such that, when the rear seats are not occupied, the corresponding rear seat headrests can be pivoted into a hidden position after being triggered, after which the driver is provided with an improved rear view. Such a rear seat headrest is for example from the DE 35 45142 A1
known. If the rear seats are occupied, the folded rear seat headrests can be transferred from the hiding position into the use position, for which purpose an electric motor assigned to the headrest is used, on the output shaft of which a drive link is rigidly attached. It is also known to insert the bracket of the headrest over a bracket length into the holder receptacles provided in the backrest.
In view of the state described above
technology becomes a technical problem of the invention therein
seen a headrest
of the type in question, in particular with regard to the holder
to improve the same in the area of the holder receptacles with high usage stability.
This problem is first and foremost
essentially solved by the subject matter of claim 1, wherein
is based on the fact that the mounting fixtures are
corresponding to at least two times the diameter of a mounting bracket
Cross-section connecting body are connected and that
the holder receptacles are formed in the connecting body, wherein
the bracket length
not more than three times the diameter of a bracket.
As a result of this configuration, it is space-saving and stable in use
reached for the pivotable mounting of the headrest. So it is preferred
that the clamp length of the bracket ends
in the connector body
corresponds to about one to three times the bracket bar diameter.
It is also provided that a clamping length or bracket length of
10 to 15 mm is present. The one that has the holder receptacles,
in the backrest
The connecting body of the motor vehicle seat also serves in addition to the mounting design
as a preferred rigid link between the bracket, whereby
a torsion-proof clamping of the two mounting brackets to each other
can be achieved. As a result, the headrest can be two
in the form of individual rods
have, which are not necessarily
in the area of the headrest
or the headrest cushion
must be connected by a web or the like. By
is the solution according to the invention
an angle-adjustable headrest
to adapt to the seating position of the person occupying the seat
and / or a rear seat headrest,
which from a usage position to a hiding position and vice versa
pivotable is created, the clamping or mounting area within
the motor vehicle seat is designed to save space. The solution according to the invention is
consequently also for both
the front seats as well for
the rear seats can be used.
The invention also relates to a
Subject according to the features of the preamble of claim 1,
proposed for advantageous further development of such a headrest
is that the bracket receptacles are connected by a connecting body
are and that for locking a pivot position of the headrest in the
a locking recess is formed which interacts with a locking body,
being im transmitted
Sense of the connecting body
a rotary latch and the locking body
forms a pawl. This makes it a clear stop position
achieved especially in the position of use.
The invention further relates to a headrest with adjustment mechanism for motor vehicles, preferably a rear seat headrest, the headrest being pivotable about a pivot axis from a position of use into a hidden position using a weight force due to a weight of the headrest and possibly being motor-driven from the hidden position into the position of use is. Such a headrest is also mentioned in the introduction DE 35 45142 A1
known. In order to make a generic headrest, preferably a rear seat headrest, in addition to achieving a high degree of operational stability, it is also more favorable in terms of control technology, that a spindle drive is provided for moving the headrest and that the weight of the headrest is counteracted by a spring. As a result of such a configuration is a generic Headrest, preferably a rear seat headrest, which is characterized not only by control advantages but also by a greater safety value when high loads occur. A spindle drive now serves to move the headrest from the position of use into the hidden position and vice versa. A particularly sensitive, infinitely variable adjustment can be carried out. To operate the spindle drive, on the one hand the threaded spindle itself can be driven, but on the other hand also a threaded nut located on the threaded spindle. The driving electric motor can also be stationary or swivel with the headrest. The electric motor driving the threaded spindle can be dimensioned relatively weak. This leads to a spatially compact structure and a weight saving. In addition, the electric motor drive is designed so that it is unaffected even under high loads. In such cases, the self-locking of the spindle drive is used. For example, the spindle can be driven via a worm drive or a bevel gear drive. If it is a bevel gear drive, the ring gear can sit on the spindle. Therefore, high adjustment forces can still be applied with a low engine output. In order to minimize the driving forces when the headrest is adjusted, the weight of the headrest is counteracted by a spring. In practice, this means that when the headrest is moved from its position of use into the hiding position, the weight of the headrest is used to charge the spring, so that the spring acts so that it acts as an energy store. In the hidden position of the headrest, the spring is therefore maximally charged or tensioned. When the headrest is moved from the hidden position to the use position, this movement is therefore supported by the previously charged spring. So essentially the drive only has to overcome the friction in the system or in the spindle drive. This leads to a design of the drive with extremely small dimensions, which is very convenient for integration with an adjustable headrest. Furthermore, it is provided according to the invention that the spring torque resulting from the spring exceeds the torque resulting from the weight force at least over part of the swivel path. This means that even when the spring action diminishes, which arises after prolonged use, a balance is always guaranteed in the moments. Care is also taken to ensure that there is sufficient force in the initial displacement of the headrest from the hidden position to transfer the headrest to the position of use. The measure that the spring is a torsion spring proves to be structurally advantageous. It can be produced in a cost-saving manner and inexpensively accommodated in the mechanics. In particular, the measure proves to be advantageous if the spring is wound around the pivot axis. An existing component is used to hold the spring. In a further development of the subject matter of the invention, wherein the headrest has two mounting brackets which are inserted into mounting receptacles over a mounting length, wherein the mounting receptacles can be pivoted together about a pivot axis to change the angular position, it is provided that the mounting receptacles by at least two times the Are connected connecting body having a cross-section corresponding to the diameter of a mounting bracket and that the mounting receptacles are formed in the connecting body, the mounting length not corresponding to more than three times the diameter of a mounting bracket. As a result of this configuration, the desired space-saving solution is further favored, with high stability in the area of the clamping or holding of the mounting bracket. Thus, it is preferred that the clamping or holder length of the holder bracket ends in the connecting body corresponds approximately to one to three times the holder bracket rod diameter. It is also provided that there is a clamping length or bracket length of 10 to 15 mm. The connecting body, which has the holder receptacles and is arranged in the backrest of the motor vehicle seat, serves, in addition to the holder design, also as a preferably rigid connecting member between the holder brackets, as a result of which torsion-resistant clamping of the two holder brackets to one another can be achieved. As a result, the headrest can have two separate mounting brackets in the form of individual rods, which need not necessarily be connected by a web or the like in the area of the headrest or the headrest cushion.
The subject matter of the further claims are below both in relation to the subject matter of claim 1 and in relation to the subject matter of claims 2 or 3 and furthermore in relation to a combination of one or more of the subject matter of claims 1, 2 and 3 explained, but can also be important in their independent formulation. Thus, it is further provided that the cross-section or cross-sectional section of the connecting body located on top of one another within a projection of the mounting receptacles of the mounting bracket has at least one dimension corresponding to twice the diameter of a mounting section, as a result of which a compact, stable mounting design is achieved. Thus, the connection body has at least a dimension of 20 mm within the projection of the mounting receptacles on one another with a mounting bracket diameter of, for example, 10 mm, wherein the connecting body can also extend beyond the projection of the mounting receptacles on top of one another. The shape of the bracket ends holding receptacles that hold conclusively preferably have fixing elements for fixing the holding brackets of the headrest in order to secure the latter against being pulled out of the holding receptacles. In a further development of the subject matter of the invention, it is provided that the mounting bracket is fixed outside of a mounting receptacle, for which purpose the mounting bracket is fixed, for example, by means of a locking arm arranged on the connecting body. The latter can, for example, positively engage in a notch groove of the mounting bracket in order to secure the latter in the withdrawal direction. A solution is also conceivable in which two locking arms acting in opposite directions are provided for fixing a mounting bracket, the opening cross section provided for the passage of the mounting bracket between the two locking arms being arranged slightly offset in a projection to the mounting receiving opening, so that when the mounting bracket is received in the mounting receptacle, the latter is non-positively fixed by the locking arms acting radially on the outside of the mounting bracket. As an alternative to this, it can be provided that the mounting bracket is fixed within a mounting receptacle, for example by a screw acting radially on the mounting bracket end inserting into the mounting receptacle, for example grub screw, or for example by arranging one in the mounting receptacle that cooperates with an annular groove in the mounting bracket end detent ball.
The invention also relates to a
Adjustment mechanism for
Motor vehicles, for example rear seat headrests, with an angular position
relative to a backrest
a motor vehicle seat on which the headrest is attached, adjustable
and in which preferably a height adjustability is given
is, with the headrest
two mounting brackets
having. To a headrest
of the type in question with a high degree of use stability in particular
training in the area of the angular position adjustment mechanism,
it is proposed that the bracket bracket in one piece in a bracket section
pass over the swivel axis.
So the pivot axis as a solid part in the form of a connecting body between
the mounting brackets
be designed, for example in the form of a casting,
on which the bracket
are molded in one piece. As a result of this configuration is a
Stable, space-saving solution in the field of adjustment mechanics
created this at opposite
Conventional headrest assembly known from the prior art
Interface, which is now in the area of the headrest cushion
The subjects of the further claims are explained below both in relation to the subject matter of claim 1 and in relation to the subject matter of claim 2, as well as in relation to the subject matter of claim 12 and moreover also in relation to a combination of the aforementioned claims , but can also be important in their independent formulation. It is further proposed that a geometrical axis of the pivot axis extends within the connecting body, the geometrical axis being able to be arranged in such a way that the mounting brackets cut it, with the connecting body being fully or partially penetrated. A crossing of the mounting bracket and swivel axis in one projection is also conceivable. It is further preferred that a spindle drive is provided for the angular adjustment of the headrest, which spindle drive when the headrest is designed as a rear seat headrest, in particular according to the subject matter of claim 2, both for the motor-driven mobility of the headrest from a hidden position into the position of use and also for Angle adjustment of the headrest can be used in the position of use. In particular, an electromotive, stepless adjustment via a spindle drive, which is designed to be self-locking, can be considered, so that the angular position of the headrest that is reached can be automatically maintained. Thus, it is further preferred that, when the headrest is designed as a rear seat headrest, the same is adjusted from the use position into the hidden position by an electric motor via the spindle drive. Alternatively, in particular in the case of a rear seat headrest, provision is made for a pivoting position of the headrest to be lockable, in particular the position of use after pivoting out of the hidden position. For example, a locking recess can be formed in the pivot axis for locking in place, which interacts with a locking body, the pivot axis or the connecting body, in the figurative sense, forming a catch and the locking body cooperating with this forming a pawl. As a result of this configuration, the headrest is clearly locked in the position of use. According to the invention, the headrest can be pivoted into the latching position by means of an electric motor-driven spindle drive, which has proven to be particularly advantageous in the case of the rear seat headrest solution mentioned, since, for example, the rear seat headrest in the hidden position can be moved into the use position by an electric motor, in which this is secured. However, a solution is also conceivable in which the headrest can be pivoted into the latched position by hand. The latching body can also be brought into a release position by hand, which latching body can be designed, for example, as a pivotable latch or in the form of a pin which can be displaced radially away from the pivot axis. The locking body can be moved into the release position, for example, by hand using a local lever or Bowden cable respectively. An electrical or electropleumatic solution, for example, is also conceivable, in which one or more of the rear seat headrests are released from the locked position from the driver's position, after which they may support the spindle drive or even fall into the hidden position solely by their own weight. In a further development of the subject matter of the invention, it is provided that the connecting body is designed as a flat body, with a cross-sectional length dimension corresponding to a multiple of the narrow side dimension, with the flat body cross-section also being irregular. In addition, the connecting body can also be designed as a polygon, preferably a regular polygon, for example in cross section as a regular hexagon. The connecting body can also be designed as a cast part or as a bent sheet metal part. So that in the event of a possible accident the energy acting in the headrest is not passed unhindered into the adjustment mechanism, in particular into the angle adjustment mechanism, it is provided that a body with a desired deformation section is provided in the power flow of the headrest adjustment or the headrest support, which is designed so that a targeted plastic deformation is achieved with increased energy in the headrest. So the energy is absorbed through deformation work. For example, the target deformation section can be formed in the latching body for this purpose. As an alternative to this, the desired deformation section can also be formed in a swivel drive of the headrest, in particular in a swivel lever of the swivel drive. Alternatively, there is also the possibility that the target deformation section is formed in an adjusting spindle of the swivel drive. If the target deformation section is formed in the latching body or in the pivoting lever of the pivoting drive or another, essentially plate-shaped part of the pivoting mechanism arranged in the power flow, then it is provided that the target deformation section is formed by cross-sectional weakenings. For example, compression zones in the form of notches with open edges can be provided. If the target deformation section is formed in the adjusting spindle, it is proposed that the target deformation section be formed by designing the adjusting spindle as an expansion spindle, the diameter and the material of the adjusting spindle being selected such that a targeted deformation of the adjusting spindle is achieved but does not tear off. This configuration lends itself to solutions in which the adjusting mechanism is formed in such a way that the adjusting spindle is subjected to tension in the event of an accident. Furthermore, it is proposed that the mounting of the connecting body and / or the pivot axis is divided into two, which has proven to be advantageous in particular in the case of a one-piece design of the mounting bracket and pivot axis or connecting body. In addition, it is proposed according to the invention that the retaining brackets are connected in the area of the headrest by a traversing yoke, to which the headrest is also attached, and that the traversing yoke can be moved by means of a spindle drive. A combined electromotive angle and height adjustment of the headrest is thus achieved, the mechanism for angle adjustment in the area of the rear seat back and the mechanism for height adjustment being arranged within the headrest. The two mechanisms can initially be controlled independently of one another, with the spindle-adjustable height adjustment of the headrest also being able to be used in conjunction with a hand-operated adjustment of the headrest, as described, in particular a rear seat headrest from a hidden position to the use position. In this regard, it is further preferred that an electromotive drive of the spindle drive is mounted in the travel yoke. Finally, it is provided that an electric motor drive for height adjustment and an electric motor drive for tilt adjustment for coordinating movement are electronically coupled, the arrangement of the pivot axis of the headrest for tilt adjustment within the rear seat back proving to be advantageous, since this results in a relatively large lever arm for angle adjustment the headrest is reached, which results in an easier tracking of the headrest impact surface. At least over a certain angular range, pivoting the headrest for tracking is sufficient without having to adjust the height of the headrest.
The invention is based on the following
Drawings which merely show different exemplary embodiments,
explained in more detail. It
1 in a schematic, partially sectioned perspective view of a motor vehicle backrest with an associated headrest according to the invention, which headrest can be adjusted both by angle and height by an electric motor, with respect to the angle adjustment relating to a first embodiment;
2 a single perspective view of the headrest with integrated electromotive height adjustment, partially cut;
3 a single perspective view of the headrest receptacle in the backrest area with an associated angle adjustment mechanism relating to a position of use of the headrest;
4 the section of the line IV-IV in 3 ;
5 a further perspective view according to 3 , but with a different view;
6 one of 3 corresponding representation relating to the non-use position or hiding position of the headrest, for example when arranged in a rear seat backrest;
7 a perspective view of the angle adjustment mechanism, relating to a second embodiment;
8th a third embodiment of the angle adjustment mechanism in a perspective view;
9 a detailed perspective view of a connecting body for holding the bracket of the headrest in a further embodiment;
10 one of the 9 corresponding perspective individual representation of a connecting body which merges in one piece into the bracket;
11 a cross section through a connecting body of the adjustment mechanism, relating to a further, lock-fixable embodiment;
12 a further cross-sectional view, relating to the latching of the connecting body in a further embodiment;
13 a cross section through the adjustment mechanism of a rear seat headrest according to a further embodiment, regarding the position of use of the headrest;
14 one of the 13 comparable representation, however regarding the hidden location;
15 a further cross-sectional representation, relating to a further embodiment of a locking arrangement.
Is shown and described initially with reference to 1 a first embodiment of a headrest arrangement for a motor vehicle, this embodiment can be used for both rear seats and front seats.
The backrest 1 of the motor vehicle seat 2 carries one as a whole with the number at its upper end 3 designated headrest. This has one of two mounting brackets that run parallel to each other 4 worn cushion body 5 to support the back of the head on the motor vehicle seat 2 located person. The bracket 4 enforce the backrest 1 and are inside that backrest 1 for adjustable angular position of the headrest 3 pivotally supported. The one in the backrest 1 Integrated swivel mechanism bears the reference symbol as a whole 6 ,
The headrest 3 is height adjustable. The mounting brackets are for this 4 in the area of the upholstery body 5 first by one of the parallel mounting brackets 4 guided traversing yoke 7 connected to which traversing yoke an electric motor drive 8th is stored. The latter acts via a gear, not shown, on one, also not shown, on one in the middle between the mounting brackets 4 extending spindle 9 screw-displaceable nut. The spindle 9 is on one, in the free end area, the bracket 4 connecting Festjoch 10 held and penetrated one in the traversing yoke 7 molded towing bush 11 , The one over the drag bush 11 downward projecting free end area of the spindle 9 is in engagement with the electromotive nut. The upholstered body 5 the headrest 3 is on the Verfahrjoch 7 attached.
By means of the electric motor drive 8th is an electrical, spindle-operated height adjustment of the headrest 3 accessible, with the Verfahrjoch 7 together with the cushion body 5 by turning the spindle 9 interacting nut along the mounting brackets 4 relocated.
The 3 to 6 show a first embodiment of the in the backrest 1 integrable swivel mechanism 6 , This first has a mounting base plate which is C-shaped in plan 12 on, the side walls forming C-legs 13 towards the, the C-bridge 14 Windows facing away from the edge of the front edge opening in the form of sections of a circle 15 have.
The exposed upper C-leg sections 16 form end bearings 17 for one, a swivel axis 18 forming connecting body 19 out.
The connecting body 19 is formed in the illustrated embodiment as a solid hexagon shaped cross section and protrudes on both sides over the bearings 17 out. Near the two free ends of the connector body 19 is penetrated by perpendicular to the geometric axis x of the connecting body 19 or the swivel axis 18 running holes, for the formation of mounting brackets 20 , In the bracket mounts 20 there are sockets 21 , preferably plastic bushings, whose inner diameter is adapted to the outer diameter of the bracket 4 the headrest 3 ,
In the illustrated embodiment, those are the holder receptacles 20 forming holes provided as through holes. However, an embodiment is also conceivable in which the holder receptacles 20 are designed as blind holes.
The bracket mounts 20 connecting connecting body 19 has at least one twice the diameter of a bracket 4 corresponding cross-section, with the further being within a projection of the mounting receptacles 20 superimposed cross-section or cross-sectional section of the connecting body 19 has at least one dimension dimension corresponding to twice the mounting section diameter. Furthermore, the bracket length does not correspond to more than three times the diameter of a bracket 4 , So with an exemplary bracket diameter d of 10 mm is a bracket length 1 from 15 to 20 mm given a dimension of a within the projection of the mounting fixtures 20 superimposed cross-sectional section of the connecting body 19 of about 20 mm in the embodiment.
The bracket 4 are also within the mounting brackets 20 fixed, for what purpose in the illustrated embodiment on the end face of the connecting body 19 , fixing screws oriented on the geometric axis x 22 radially on the outer wall of the bracket 4 act.
Adjacent to one of the C-legs 13 the mounting base plate 12 is a swivel lever 23 rotatable on the, the swivel axis 18 forming connecting body 19 attached, the free end of the lever extends laterally into the area of the assigned window 15 the mounting base plate 12 extends and here over a parallel to the geometric axis x of the connecting body 19 extending axle beam 24 with a drag bush 25 is coupled.
The latter is interspersed with one in the transition area from the cut-out C-leg sections 16 to the C-bridge 14 around a parallel to the geometric axis x of the connecting body 19 aligned axis y tilting spindle 26 which between the C-legs 13 extends approximately diagonally.
On the drag bush 25 is an electric motor drive 27 attached, which on a not shown, with the spindle 26 interacting mother.
The actuation of the electric motor causes a screw displacement of the nut driven by it along the spindle 26 while dragging the drag bush 25 what about the axle beam 24 and the swivel lever 23 a rotational displacement of the connecting body 19 or the swivel axis 18 has the consequence. Over the latter are the mounting brackets 4 and thus the headrest 3 swiveled to the desired position. Here are about the electric motor drive 27 both slight angle adjustments of the headrest 3 as well as with an arrangement of the swivel mechanism 6 in the area of a motor vehicle rear seat the complete pivoting of the headrest 3 accessible from or into a hiding place.
The swivel lever 23 indicates target deformation sections for the absorption of energy acting in a possible accident 28 in the form of open-edged V-shaped cross-sectional weakenings. As a result of this configuration, a large amount of energy is applied to the swivel mechanism 6 (see arrow u) this area is deliberately plastically deformed. The swivel lever is also supported 23 via a molded boom 29 on the outer surface of the assigned C-leg 13 over the entire swivel path.
In 7 is another embodiment of the pivot mechanism 6 shown. This is essentially similar to the mechanics described above, so that the same components have the same reference numerals. In contrast to the previously described embodiment, the pivot lever is in this embodiment 23 formed two-leg, by forming a U-profile, the free ends of the U-leg rotatably the pivot axis 18 or the connecting body 19 include. In addition, the mounting base plate carries 12 a bearing body 30 to form additional bearings 17 near the end portions of the connector body 19 ,
An essential difference is the fixation of the bracket 4 in the bracket mounts 20 , This does not happen, as previously described, within the holder receptacles 20 for example by means of screws, but rather outside of the mounting fixtures 20 , for which two locking arms acting in opposite directions in the direction of a mounting bracket body axis 31 outside of the mounting brackets 20 on the connecting body 19 are attached, which the associated bracket 4 non-positively in the assigned bracket holder 20 fix against.
8th shows a further embodiment of a swivel mechanism 6 , in which, in contrast to the previously described exemplary embodiments, the spindle 26 directly via the electric motor drive 27 is applied and one on this spindle 26 screw-displaceable nut 32 for swiveling the connecting body 19 or the swivel axis 18 acts on them.
The the swivel axis 18 forming connecting body 19 is designed in this embodiment as a bent sheet metal part, with mounting receptacles on both ends 20 are formed and the portion of the connecting body formed between them 19 is essentially elongated as a double-walled flat body component. In this embodiment too, the bracket length is 1 in the area of the mounting bracket 20 not more than three times the bracket diameter d. So with a diameter d of 10 mm is a bracket length 1 15 mm.
On the mounting base plate 12 facing flat side that carries the connecting body 19 Forming bent sheet metal part two, pivoted levers 23 forming triangular sheets 33 which ends of two spaced C-legs 13 the mounting base plate 12 are pivoted thereon about a geometric axis x. In the free end areas of the triangular sheets 33 grabs the mother 32 eccentric to the axis x via pins 34 on.
That the connecting body 19 opposite end of the spindle 26 is freely rotatable in a U-profile 35 , the latter about a tilt axis y on the C-legs 13 the mounting base plate 12 is tilt-supported (the axis body forming the geometric axis y is not shown).
On top of the U-profile 35 engages an electric motor drive 27 on the spindle 26 on. A spindle actuation causes the nut to be displaced by screws 32 along the spindle axis, whereupon with simultaneous tilting of the spindle 26 the connecting body 19 is pivoted about the geometric axis x.
In the 9 and 10 are further embodiments of swivel axes 18 forming connecting bodies 19 shown. These are designed as castings. As in the illustration in 9 can recognize the bracket 4 and thus also the bracket mounts 20 deviating from the circular cross sections shown in the further exemplary embodiments, also have a rectangular cross section.
Furthermore, as in 10 shown, the bracket 4 also in one piece in a mounting section 36 the swivel axis 18 pass. As a result, the interface between the headrest shifts in this embodiment 3 and swivel mechanism 6 from the backrest area into the headrest area, further in such an embodiment on two-part bearings for the pivot axis 18 is used.
With the electromechanical spindle drive swivel adjustment of the headrest 3 a self-locking drive is preferably selected. However, there is also the possibility, in particular the pivoting position of the headrest 3 , further in particular the position of use of a rear seat headrest 3 racing-set. This version is particularly useful when the headrest is pivoted manually 3 conceivable in the locking position. Exemplary solutions show the 11 and 12 , That's how the pivot axis is 18 or the connecting body 19 with a locking recess extending in the axial direction over a length of 30 to 60 mm 37 provided, in which in the locked position, for example in the use position of a rear seat headrest, the locking lug 38 a swivel-mounted locking body 39 intervenes. The in the axial direction of the connecting body 19 or the swivel axis 18 measured length of the catch 38 is the length of the recess 37 customized.
The locking body 39 is in the in 11 Embodiment shown designed as a pawl, which is parallel to the geometric axis x of the connecting body 19 or the swivel axis 18 aligned axis z is pivotable, the pawl 40 according to the rest position 11 is loaded by a spring, not shown. The pivot axis 18 or the connecting body 19 assumes the function of a rotary latch, preferably using a one-piece, solid connecting body 19 according to the first embodiment in FIGS 1 to 6 what connector body 19 serves at the same time as the bracket holder.
recess 37 and latch 38 can be designed in such a way that the latching position can be assumed and also canceled again by means of an electric motor drive. However, the locking body is also conceivable 39 or the pawl 40 by hand in a release position, for example by Bowden access to the pawl 40 ,
Alternatively, the locking body 39 as shown in 12 also as spring-loaded, radially in the direction of the swivel axis 18 or the connecting body 19 acting locking pin 41 be formed, which is the same as the previously described embodiment in a locking recess 37 of the connecting body 19 or the swivel axis 18 intervenes. As shown here, the release position can be activated using a hand-operated release lever 42 done, which is the locking pin 41 radially outward from the recess 37 relocated.
The 13 and 14 show an embodiment of a rear seat headrest 3 , which can be pivoted manually or, according to one of the exemplary embodiments described above, electro-mechanically spindle-operated from a hiding position into a position of use and vice versa. Here is a support frame with the number 43 designated. About the geometric axis x of the swivel axis or the connecting body 19 is a swivel lever 23 displaced. As in the previously described embodiments, the displacement can take place here via a spindle drive (not illustrated). The swivel lever 23 is one of the bracket holder 20 assigned positive locking pin 24 , Above this sits a spring designed as a torsion spring on the geometric axis x 45 , The turns of this spring 45 enclose the swivel axis 18 , One feather leg 46 is supported on the support frame 43 off while the other feather leg 47 in the sense of a torque acting clockwise on the pivot lever 23 acts.
Is from the in 13 illustrated position of use of the rear seat headrest 3 this into the hidden position 14 pivoted, the weight G in 14 by the spring 45 counteracted. Accordingly, this works like an energy storage spring. That means that when retracting the headrest 3 the spring from the hiding position to the use position 45 acts supportive. This leads to the advantage that the drive essentially only has to overcome the friction in the adjustment mechanism.
As further from the representations in the 13 and 14 to recognize, the bracket length is also in this embodiment 1 less than three times the diameter d of the bracket 4 , with the bracket mounts 20 in which, the pivot axis 18 forming connecting body 19 are trained. The latter has a cross section corresponding to at least twice the mounting bracket diameter d.
15 shows a further alternative embodiment with a latching of the headrest in the use position. Here, too, is like the end example in 11 the connecting body 19 with a radial recess 37 provided, in which in the use position a latch 38 a pawl pivotable about an axis x 40 blocking occurs. This pawl 40 is in the locked position by means of a leg spring 50 loaded.
The locked safe position of use is canceled by actuating a servomotor 51 , whose axially acting actuator 52 while swiveling the pawl 40 is drawn in. In the course of swiveling the pawl 40 leaves the latch 38 the recess 37 , after which the connecting body 19 or the swivel axis 18 is released. The headrest then falls into the hidden position due to its own weight.
The actuator 52 after triggering the rest will return to the basic position 15 moved back. The spring loaded on the jacket of the connector body 19 resting latch 38 falls back into the locking recess when the headrest is set up manually 37 on.
All disclosed features are (in themselves)
essential to the invention. In the disclosure of the application is hereby
also the disclosure content of the associated / attached priority documents
(Copy of the pre-registration) fully included, too
for the purpose of features of these documents in claims of this