WO2012069184A1

WO2012069184A1 - Height-adjustable deflecting device for a three-point seatbelt, vehicle seat comprising a three-point seatbelt, and method for adjusting the height of the top retaining point of a three-point seatbelt

Info

Publication number: WO2012069184A1
Application number: PCT/EP2011/005884
Authority: WO
Inventors: Winfried Titz; Austin Jennings
Original assignee: Isringhausen Gmbh & Co. Kg
Priority date: 2010-11-23
Filing date: 2011-11-22
Publication date: 2012-05-31
Also published as: DE102010052245B3; JP2013544705A; CN103328277A; CN103328277B; JP5843879B2

Abstract

The invention relates to a height-adjustable deflecting device for the top retaining point (23) of a three-point seatbelt (2), comprising a holder (4) that can be attached to a supporting element (9) of a vehicle seat (1) or can be connected to a frame of a vehicle in a rigid manner. A housing (24) is movably attached in the holder (4). The housing has a pivoting axis (11), and a roller (12) with a rotational axis (13) is additionally arranged in said housing. The belt strap (29) of a three-point seatbelt (2) can be guided by means of the roller, and the housing also has an outlet slot (15) for the belt strap (29). First connecting means (7) are formed on the holder (4), and second connecting means (17) are formed on the housing (24). In a locked position the connecting means are engaged with each other in a form-fitting manner, and in an adjusting position the connecting means and are not engaged with each other.

Description

Height-adjustable deflection device for a three-point belt, vehicle seat with a three-point belt and method for height adjustment of the upper breakpoint of a three-point belt. The invention relates to a height-adjustable deflection device for the upper breakpoint of a three-point belt, a vehicle seat with such a height-adjustable deflection device and a method for height adjustment of the upper breakpoint of a three-point belt.

In particular, commercial vehicle seats are preferably equipped with pneumatically or mechanically resilient vibration systems and thus protect the driver from unpleasant and harmful vibrations of different frequency and amplitude. Another security element is the three-point belt. The fixed vehicle-mounted attachment of the third Gurtpunktes e.g. on the B-pillar leads due to the relative movement between the vehicle and seat or driver to significant loss of comfort. Safety and comfort are provided by the vehicle seats, with a fully integrated three-band seat belt system, belt end fitting on the seat side in the pelvic area and a seat belt buckle on the driver's side in the direction of travel on the right. The shoulder belt outlet is integrated on the backrest side and connected to the belt roller of an automatic belt system. A problem with three-point seat belts is that a bias shoulder strap can not optimally work on different sized people at a fixed upper breakpoint. To improve this effect, the upper breakpoint must therefore be able to be varied in height. From DE 35 30 495 AI a device is known, by means of which the upper breakpoint can be varied in height.

For this purpose, on the backrest of the vehicle seat a

Slot guide formed, which runs obliquely from top to bottom. It has a slot opening with a width of about 3.5 times the width of the seat belt. This makes it possible that, depending on the size of the occupant, the upper breakpoint is higher or lower. As a result, an improved effect of the three-point belt on the occupants is achieved. However, the seat belt within the slot guide can be moved unintentionally up or down, so that the optimum height is not permanently guaranteed. Thus, in principle, the better effect that may be possible in principle can no longer unfold.

From JP 2001-158327 A, a height-adjustable deflection device for the upper breakpoint of a three-point belt with a holder is known, which is attachable to a support member of a vehicle seat. In the holder, a deflector is movably mounted, which has a roller with a rotation axis over which the webbing of a three-point belt is guided. Parallel to the axis of rotation of the roller, a housing has an outlet slot for the webbing. On the holder and on the deflector connecting means are formed so that they are in a locking position positively engaged with each other and are not engaged with each other in an adjustment position. The deflector is thus rotatable in the adjustment position about a rotation axis. The holder has a connecting plate and two support brackets, in each of which a slot for receiving the axis of rotation of the deflector is formed. However, such a device is not easy to use and is not easy to assemble due to the various parts required. From DE 35 30 495 AI a device is known, by means of which the upper breakpoint can be varied in height. For this purpose, on the backrest of the vehicle seat a

From US 5,088,794 A a belt retractor is known, which has a variable in height exit slot for the safety belt. The exit slot is aligned horizontally in a cylindrical shell which is rotated about its center axis. As a result, the height of the exit slot can be adapted to the person on the vehicle seat. The position of the exit slit is determined by a mechanism in the form of a pivoting lever which is disposed laterally of the cylindrical shell. The Schwenkhe- has a cam, with which it engages in one of a plurality of wells in a locking element connected to the cylindrical shell. The pivot lever releases the cylindrical shell when the pivot lever is rotated by means of a setting wheel against a spring force from its locking position and thereby the cam emerges from the recess. After the cylindrical shell has been rotated with the exit slot to the correct height, the adjusting wheel is released and the cam dives into another recess, so that the height of the exit slot is fixed again. This is a complicated device with many parts that must all interlock. Finally, EP 1 838 561 B1 discloses a device by means of which the height of the upper breakpoint can be changed. For this purpose, a deflector is movably mounted in a holder, which has a roller with an axis of rotation over which the belt can be guided, and a housing with an outlet slot for the belt, which is aligned parallel to the axis of rotation of the roller. On the holder, first connecting means and second connecting means are formed on the deflector, which in a locking position engage in a positive engagement with each other and are not engaged with each other in an adjustment position, so that the deflector is rotatable about the axis of rotation. The axis of rotation of the deflector is pressed by a spring in the locked position and the holder has a connecting plate and two support brackets, in each of which a slot for receiving the axis of rotation of the deflector is formed. The deflector and the role have a single matching axis of rotation. Thus, the height adjustment of the upper breakpoint of the three-point belt can be achieved by pushing the deflector back against a pressure, rotating it around the axis of rotation and then releasing it again.

The object of the invention is to introduce a height-adjustable deflection device for the upper breakpoint of a three-point belt, which allows easy adjustment of the height and at the same time this upper breakpoint can not be changed unintentionally. This should also be achieved by the simplest possible method. The object is achieved by a height-adjustable deflection device having the features of patent claim 1 and a vehicle seat having the features of patent claim 15 and a method having the features of patent claim 16. The exit slot determines the height of the upper holding point of the three-point belt. The exit slot is located in the housing, which in the locked position formally is conclusively connected via corresponding connecting means with the holder. This ensures a secure fixing of the upper breakpoint. Characterized in that in an adjustment position no engagement of the connecting means between the holder and the housing is given or there is a freewheel, the housing can be rotated in this position about the pivot axis. This changes the height of the exit slot, which is formed in the housing. Thus, the desired height of the exit slot and thus the upper breakpoint can be set very easily and individually.

By moving the housing from the adjustment position into the blocking position, the height of the upper holding point is defined as described above and can not be changed unintentionally. If a freewheel is used, a rotation against the freewheel is not possible. This ensures that once set to the height of the occupant upper breakpoint can not be accidentally changed again. This ensures an always optimal effect of the three-point belt on the occupant. The height-adjustable deflection device according to the invention is also very simple in construction and to operate, since the holder has a connecting plate and two support brackets, in each of which a hole for receiving the axis of rotation of the housing or alternatively a journal bearing, it can also be an axle on the be formed a support bracket and a hole at the other support angle. This is a very simple construction for the movement of the pivot axis between locking position and adjustment position given. The fact that the pivot axis of the housing by means of a spring, in particular a spiral spring, is pressed into the locked position, an extremely simple and efficient way is given to keep the housing in its locked position, if no adjustment is wanted. Conversely, a transfer into the adjustment position can be counteracted by the pressure of the spring. be made. After adjustment, the housing then automatically returns to its locked position. By the displacement of the axis of rotation relative to the pivot axis of the housing to the rear, so a decoupling of these two axes, the pivot axis of the housing during rotation can remain approximately in the same position. Thereby, the inventive method according to claim 14 with the just mentioned advantages is made possible, wherein the housing is pressed against the rotation in a first direction against a pressure to the rear, it rotates about the rotation axis and it is then released again. Furthermore, it moves in rotation in the opposite second direction as a ratchet mechanism in the freewheel. In the context of this application, a vehicle seat is understood to be a seat for a motor vehicle (also commercial vehicle), for an aircraft or for other vehicles which make it necessary to fasten the seatbelts (also amusement devices).

An advantageous development of the invention provides that it is in the first connection means and the second

Lanyards are each coordinated toothing. Thereby, a very simple configuration is provided for connecting means which are easy to disengage from each other to move them into the adjustment position, and are easy to bring into positive engagement with each other to move them into their locked position.

A further advantageous embodiment of the invention provides that the toothing is formed according to the principle of a freewheel in a rotational direction of the housing. As a result, when rotated in one direction, the housing need not be actively moved rearwardly to disengage the gearing. This leads to an increased ease of use. Preferably, the device is designed such that this freewheeling principle for the upward movement of the exit slot is present.

A further advantageous development of the invention provides that the first and second connection means are formed only on one side of the deflection device. As a result, the housing and the subsequent components can be made less complex. A further advantageous development of the invention provides that the pivot axis is formed in its first bearing in the holder as a fixed bearing and in its second bearing as a floating bearing. This achieves a simplified, advantageous storage situation. A fixed bearing is understood to mean a bearing which is immutable in its position, allowing only small deviations in the orientation of the pivot axis. By contrast, a non-locating bearing is understood to mean a bearing which, in its relative position, is displaceable relative to the two interconnected components, so that the pivot axis-if a movable bearing is formed at both ends-can perform a parallel displacement.

A further advantageous embodiment of the invention provides that the basic shape of the housing has a frustoconical, concentrically formed about the pivot axis lateral surface. Since the outlet slot for the three-point belt, which defines the upper stopping point, is located on a frustoconical lateral surface, preferably rounded off along the direction of the pivot axis, the horizontal position of the outlet slot is determined by the rotational movement and vertical movement its arrangement on the frustoconical surface also changed. As a result, the upper breakpoint for large occupants sen further ahead than with small occupants, which has turned out to be particularly favorable. In addition, the truncated cone shape has a positive influence on the course of the belt, since it leaves the housing in the right direction, ie the belt buckle.

A further advantageous embodiment of the invention provides that recessed grips are formed at the end of the housing with the larger diameter. This improves the user-friendliness compared to a central actuation of the housing. Especially in the upper position of the exit slot the ease of use is much better, since when setting no longer needs to be pressed on the webbing itself, but the ergonomically shaped recessed handles can be used.

A further advantageous development of the invention provides that the roller comprises a belt retractor. This integrates two parts into one. Thus, it is no longer necessary to attach a belt retractor in another place in addition to the role. This is very advantageous in such height-adjustable deflection devices, which are integrated in the vehicle seat, since thus space is saved within the vehicle seat.

A further advantageous embodiment of the invention provides that the height-adjustable deflecting device is arranged in the vehicle seat and the housing is partially covered by a panel. In a deflection integrated in the vehicle seat on the one hand gives a good aesthetic effect and on the other hand it is avoided that an accidental pinching or other injury when adjusting the deflection can be done. A further advantageous development of the invention provides that the pivot axis is integrally formed with the housing at least at one bearing point. This allows the entire housing to be designed in a single piece.

A further advantageous embodiment of the invention provides that the pivot axis at least in the region of one of its two ends a suitable positive connection, for example. A groove, a bore or a milled recess, in which the free end of the spring is guided. This ensures that the axis of rotation is captive in the axial direction.

A further advantageous embodiment of the invention provides that the roller is convex. As a result, a good centering of the webbing is achieved on the roll.

A further advantageous embodiment of the invention provides that the bearings of the roller are performed crowned. Compared to cylindrical bearings, friction is reduced and wear resistance improved, resulting in better ease of movement and longer service life.

A further advantageous development of the invention provides that the area around the outlet slot is designed as an insert part detachable from the housing. This freedoms in both the choice of materials and in the design, for example, in terms of color and surface grain achieved. The belt exit slot can also be easily replaced and thus very easily adapted to the specific application needs of the occupant. As a result, it is easy and quick to change between different outlet slot geometries with the same main body of the housing. A further advantageous embodiment of the invention provides that the outlet slot in its central region and the axis of rotation are both horizontal and the outlet slot is designed to be bent upwards in its two edge regions. Due to the geometry, all entry and exit angles of the webbing relevant to the application can be realized without swiveling parts. It results in an orderly insertion and withdrawal behavior, so that unfolding of the webbing is prevented when pulling, which would lead to a disability of the collection process. In addition, the friction between the exit slot and the webbing is reduced.

Further details of the invention will be described below with reference to the embodiment shown in FIGS. They show in detail:

Fig. 1 is a perspective view of an embodiment of a height-adjustable according to the invention

Deflection device,

Fig. 2, the deflection device of Figure 1 from another

Perspective without the housing,

3 shows the deflection device of Figure 1 in a section,

4 is a perspective, enlarged view of the housing of Figures 1 and 3,

5 is a front view of the housing according to Figure 4,

6 is an enlarged front view of the insert according to the figures 1 and 3-5, 7 shows a perspective view of a height-adjustable deflecting device on a backrest frame and FIG. 8 shows the deflecting device of FIG. 1 in the viewing direction of FIG. 3 without it being cut.

1 shows a perspective view of a deflection device according to the invention is shown, by means of which the height of the upper breakpoint 23 of a three-point belt can be changed. The deflection device according to the invention in this case has four components that bring in their interaction with the advantages of the invention: a holder 4, a housing 24, a spring between these two arranged 10 and a roller 12th

The holder 4 and thus the entire deflection device according to the invention is firmly connected in the illustrated embodiment via a connecting plate 5 with a support member 9 of a vehicle seat, not shown. Here, all known connection methods are possible, for example, welding, riveting or screws. In addition to the arrangement shown within the vehicle seat - for example, in his backrest within the padding - the deflection device according to the invention can also be mounted directly on the frame of the vehicle in which the vehicle seat is located. This corresponds to the possibilities of how the known upper breakpoints 23 have been mounted in vehicles so far. The assembly of the illustrated holder 4 has in addition to the

Connecting plate 5 still two arranged thereon support bracket 6, which are arranged parallel to each other spaced. In these support brackets 6 first connecting means 7 (see Figure 8) are formed. These first connection means 7 are executed in the form of a toothing. They are formed only at one of the two support bracket 6. On the other hand, it is necessary that in each of the two support bracket 6 opposite each one bearing (19, 20) is present.

In a slot 8, the assembly of the housing 24 is supported by the formed on one of its side surfaces 16 second bearing 20 (see in particular Figure 4) on one side in the holder 4 as a floating bearing. For this purpose, the hole 8 in the holder 4 is larger than the second bearing 20 on the housing 24. On the opposite side, the housing 24 has an opening 26 which is arranged virtually free of play on the first bearing 19 of the holder 4 as a fixed bearing rotatable. The housing 24 thus has a pivot axis 11, which is formed by the two bearings 19, 20. Concentrically about this pivot axis 11, a lateral surface 14 is formed, which has the shape of a rounded truncated cone. This is best seen in Figure 5. In the edge region of the lateral surface with the larger diameter grip recesses 27 are formed, which allow a better grip and operation of the lateral surface 14. Within the lateral surface 14, an exit slot 15 is formed. Through this exit slot 15, the webbing of a three-point belt (both not shown), which is guided over the roller 12 within the deflection device.

On the side surface 16 of the housing 24 with the larger

Diameter second connecting means 17 are formed. These are matched to the first connecting means 7 to the support bracket 6 of the holder 4. In the case shown, it is a sprocket having teeth with different tooth flank angles, wherein the back of the teeth has an angle without self-locking and the tooth front side such a self-locking, so that when interacting with the first connecting means 7 on the holder 4 with the inversely executed teeth on the support brackets 6, a ratchet mechanism with associated locking and freewheeling effect arises. In principle, it is also possible that on both side surfaces 16 second connecting means 17 and their respective first connecting means 7 are arranged on the two support brackets 6 of the holder 4, but it is preferred that this is the case only on one side surface 16. On the connecting plate 5 of the holder 4, a spring 10, in the form of a spiral spring, firmly attached. The attachment can be non-positive or positive. In the region of its free end, the spring 10 pushes the pivot axis 11 of the housing 24 within the slot 8 to the front (in the figure 1 to the left). This means that the second connection means 17 of the housing 24 are engaged with the first connection means 7 of the holder 4. The deflector is thus in a blocking position, since the pivot axis 11 and thus the lateral surface 14 with the exit slot 15 can not rotate. In this blocking position thus the upper breakpoint 23 of the three-point belt is fixed and can not be changed by a downward or forward pulling the three-point belt. However, in the illustrated embodiment, a rotation of the housing 24 due to the ratchet mechanism upwards also possible in this locking position. Since the second bearing 20 can move within the slot 8 against the force of the spring 10, the teeth of the two connecting means 7, 17 can be disengaged by the housing 24 is pressed against the spring force in the direction of the connecting plate 5 of the holder 4 , In this position, the housing can also be moved against the direction in which the toothing acts like a ratchet mechanism. In the illustrated embodiment, this is in the movement of the exit slot 15 down. The free end 28 of the spring 10 engages in a recess at the end of the second bearing 20. This prevents that the pivot axis 11 can be moved in the axial direction. In the illustrated embodiment, the second bearing 20 and the housing 24 are integrally formed. Any other embodiments of the spring 10 and the pivot axis 11 are also possible, which allow a cooperation between these two parts, wherein the pivot axis 11 can rotate but still can not be displaced in the axial direction and is simultaneously pushed forward within the slot 8.

The deflecting device is located behind a diaphragm 18, see FIGS. 7 and 8, over which it partly protrudes with its lateral surface 14. This achieves an aesthetically pleasing conclusion between the deflection device and the upholstery of the backrest. In addition, an inmate can not accidentally incur an injury by accidentally putting his hand in the diverter. The deflection device is in fact completely encapsulated by the diaphragm 18.

The adjustment position is achieved in that pressure 25 in the direction of the double arrow on the housing 24 via the lateral surface 14, in particular via the recessed grips 27, is exercised. The pivot axis 11 is thus moved against the spring force of the spring 10 by a Entriegelungsweg along the slot 8 so that it changes their orientation, since it is mounted at the left end in a fixed bearing. As a result, the first connection means 7 of the support bracket 6 are no longer in engagement with the second connection means 17 of the side surfaces 16 of the housing 24. This makes it possible, the housing 24 about the pivot axis 11 and against the ratchet mechanism down to rotate. The exit slot 15 can then be rotated to the level that is optimal for the occupant on the vehicle seat. After the desired height of the exit slot 15 is reached, the pressure 25 is removed on the lateral surface 14 of the housing 24, so that the spring 10, the pivot axis 11 pushes back within the slot 8 to the left and the second connecting means 17 of the side surface 16 of the housing 24th again in engagement with the first connecting means 7 on the support bracket 6 of the holder 4 are engaged. In this position, which corresponds to the height of the exit slot 15 and thus of the upper holding point 23 of that in Figure 1, the housing 24 is again in its locked position, so that it can no longer be rotated about the pivot axis 11 down , Thus, a safe determination of the upper breakpoint 23 is given in this position again, without this could be changed by mistake. It goes without saying that any locking positions between the lowest located upper stopping point 23 and the highest upper stopping point 23 can be obtained. For this purpose, it is only necessary that the first connection means 7 can be brought into engagement with the second connection means 17 in the desired position. It thus depends on the fineness of the respective first connecting means 7 and the respective second connecting means 17 how large the distances between two adjacent points for the upper stopping point 23 are.

Since the exit slot 15 is located on a frustoconical lateral surface 14, the upper stop point 23 does not move on a vertical straight line but on a curved path about the pivot axis 13. One thus also receives a horizontal relative path, which depends on the height of the selected upper breakpoint 23. This means that in the case of smaller occupants, the upper stopping point 23 is located farther back (in the illustration on the right) and, in the case of larger occupants, further ahead. This is advantageous for the optimal function of the three-point belt.

In Figure 2, the housing 24 shown in Figure 1 is removed to better recognize the hidden features underneath. In essence, these are the first bearing 19 and the roller 12.

The first bearing 19 is formed in the form of a fixed bearing with a bearing bore 28, so that the opening 26 of the side surface 16 of the housing 24 on the side with the smaller diameter (see in particular Figure 5) is pushed almost free of play on the first bearing. It only has so much leeway that a change in the direction of

Pivot axis 11 in a small frame is possible; namely so far that the second bearing 20 of the housing 24 (see Figure 4) in the slot 8 of the support bracket 6 can be moved.

The roller 12 is arranged on the rotation axis 13 and convex so that it has a smaller diameter at its two ends than in the middle. As a result, a better centering of the webbing on the roller 12 and thus in the exit slot 15 is achieved. To reduce the friction of the roller 12 during rotation, when the webbing is pulled in or out, the bearings of the roller 12 are spherical (not visible).

In Figure 3, which shows a section through the deflection device according to the invention, are well the spatial arrangement of Swivel axis 11 relative to the rotation axis 13 and the exit slot 15 can be seen.

The pivot axis 11 in its locking position and the rotation axis 13 are parallel to each other. In contrast to the prior art, these two axes are spatially separated from each other, wherein the rotation axis 13 not only behind the pivot axis 11 - seen from the exit slot - arranged, but also slightly below the same.

The exit slot 15 is not parallel to the axis of rotation 13, since it is formed in the frusto-conical lateral surface 14 of the housing. Although it essentially runs (see FIGS. 4-6) horizontally with respect to its middle region 2, it is rotated with respect to the installation position to the other side of the vehicle seat to which the belt buckle is attached. This gives a natural direction for the webbing in the direction of the buckle, which increases the wearing comfort for the occupant.

In FIG. 3, the guidance of the belt 29 in the deflection device and after it leaves the outlet slot 15 can be easily recognized. FIGS. 4 and 5 show perspective views of the housing 24 from two directions. The view of Figure 4 is based on the representation of the side surface 16 with the second connecting means 17, on the other hand, Figure 5 shows a nearly frontal view (relative to the mounting position), in which a slight rotation on the other side surface 16 with the opening 26 is made ,

Most features of the housing have already been discussed above: the rounded frusto-conical surface 14, the embodiments of the bearing and locking features on the side surfaces 16 and the recessed grips 27th To the recessed grips is still to supplement that they are designed so that the fingers (one each) of the occupant can engage well in them and find good support, so that in an ergonomic manner can be done error-free rotation of the housing 24, until the occupant desired position of the exit slot 15 and thus the upper breakpoint 23 is reached.

The area around the outlet slot 15 is formed as a separate, one-piece insert part 1, which can be detached from the housing 24. The insert 1 can thus be easily replaced, whereby both designerische variety and an individual approach to the occupant can be achieved. This insert is shown in FIG.

The horizontal central region 2 of the exit slot 15 is delimited by two upwardly bent edge regions 3. The externally curved configuration of the outlet slot 15, the radii of which are optimized with regard to avoiding folding of the webbing during insertion, helps to reduce the friction (which is particularly noticeable when pulling in) of the belt, in addition to the extremely low friction the arrangement and configuration of the rotation axis 13 together with roller 12th In addition, in cooperation with the further geometry of the housing and the arrangement of the rotation axis 13 and the pivot axis 11, all relevant entry and exit angles of the webbing are realized without pivotable parts.

FIG. 8 differs from FIG. 3 only in that the height-adjustable deflection device is not in one

Sectional view is shown, but in their lateral View. In the following, therefore, only the characteristics which are additionally recognizable with respect to FIG. 3 will be discussed.

On the side surface 16 of the housing 24, second connecting means 17 are formed around the pivot axis 11 (oriented to the left in the illustration). These second connecting means 17 are formed as a sprocket, whose teeth are inclined counterclockwise. The second connection means 17 are partially in positive engagement with first connection means 7. The first connection means 7 are formed on the support bracket 6 of the holder 4. They are formed over a predetermined range inversely to the second connection means 17. In the illustrated position, the second connecting means 17 engage positively in the first connecting means 7, so that a rotation of the housing 24 about the pivot axis 11 is not possible. The pivot axis 11 is pressed against the pressure 25 of the spring 10 (see Figures 1 and 2) against the direction of the double arrow to the left. Due to the configuration of the rows of teeth of the two connecting means 7, 17 and the possibility that the bearing facing the viewer of the pivot axis 11 can escape to the right in the direction of view (see embodiments of Figures 1 and 2 with respect to the slot 8, in which the pivot axis 11 is mounted), there is the possibility that when a force is applied to the housing 24 by a clockwise rotation of the rows of teeth slide over each other and thus an adjustment of the height of the outlet slot 15 can take place upward.

A rotation of the housing 24 in the opposite direction, ie counterclockwise, however, is only possible if the rows of teeth of the two connecting means 7, 17th be disengaged. This is done by a pressure 25 to the right against the force of the spring 10 (see Figures 1 and 2). If the two rows of teeth are free, by turning the housing 24 by the occupant counterclockwise, the height of the exit slot 15 can be changed down. When the desired height of the exit slot 15 is reached, the occupant releases the housing 24, so that no pressure 25 acts more to the right on the spring 10. As a result, the pivot axis 11 and thus also the second connecting means 17 moves back to the left and come into positive engagement with the first connecting means 7. In this position, then again only a rotation of the housing 24 in the clockwise direction is possible, as described above. This mechanism is comparable to a ratcheting mechanism.

FIG. 7 shows a perspective view of a height-adjustable deflecting device according to the invention on a backrest frame 21. Here, the Umlenkvorrich- device is mounted on the support member 9 and this firmly connected to the back frame 21.

In the finished state of the vehicle seat runs a pad below the aperture 18, so that the deflection device together with the support element 9 and backrest frame 21 are not visible.

The exit slot 15 is slightly rotated clockwise relative to the horizontal. In addition, it is inclined relative to the pivot axis 11 to the left on this. This results in a belt guide that is well adapted to the comfort requirements of the occupant.

In summary, it can be said that the invention provides a deflection device, which compared to the conventional designs by a very small design, which also has a good ability to integrate within a vehicle seat and is fully enclosed, so that the risk of injury is close to zero and is almost maintenance-free, since no dirt gets into it. In addition, the deflection device according to the invention consists of only a few components. There are even only four components necessary, namely a holder 4, a housing 24, an interposed spring 10 and a roller 12, since the housing 24 also serves as an actuating element. Furthermore, the deflection device 3 according to the invention provides a very good Gurtaufrollverhalten because predominantly rolling friction instead of sliding friction arises. The deflection device according to the invention does not rattle and does not emit any other noise, since it is a system in which the housing 24 is pressed by means of the spring-biased pivot axis 11 in the holder 4.

LIST OF REFERENCE NUMBERS

insert

Middle area

border area

holder

connecting plate

supporting brackets

First connecting means

Long hole

supporting member

feather

swivel axis

role

axis of rotation

lateral surface

exit slot

side surface

Second connecting means

cover

First camp

Second camp

Backrest frame

bearing bore

Upper breakpoint

casing

print

perforation

grip

Free end of the spring

webbing

Claims

claims

Height-adjustable deflection device for the upper breakpoint (23) of a three-point belt (2) with a holder (4) which can be attached to a support element (9) of a vehicle seat (1) or firmly connected to a frame of a vehicle,

wherein in the holder (4) a housing (24) is movably mounted, which has a pivot axis (11), and in addition a roller (12) with an axis of rotation (13) is arranged, via which the webbing (29) of a three-point belt (2 ), and an outlet slot (15) for the webbing (29), and the outlet slot (15) is over the vast majority of its length parallel to the axis of rotation (13) of the roller (12)

wherein on the holder (4) first connecting means (7) and on the housing (24) second connecting means (17) are formed, which are positively engaged with each other in a locking position and are not engaged with each other in an adjustment position, so that the housing (24 ) is rotatable about the axis of rotation (13),

wherein the axis of rotation (13) of the housing (24) by means of a spring (10) is pressed into the locked position

and the holder (4) has a connecting plate (5) and two support brackets (6), in each of which a slot (8) and a bearing bore for receiving the housing (24) of the deflector is formed,

and the axis of rotation (13) is arranged in parallel and viewed from the exit slot (15) behind the pivot axis (11).

Height-adjustable deflection device according to claim 1, characterized in that it is in the first connection means (7) and the second connecting means (17) are each coordinated toothing.

3. Height-adjustable deflection device according to claim 2, characterized in that the toothing on the principle of a freewheel in a rotational direction of the housing (24) is formed.

4. Height-adjustable deflection device according to one of the preceding claims, characterized in that the first and second connecting means (7, 17) are formed only on one side of the deflection device.

5. Height-adjustable deflection device according to one of the preceding claims, characterized in that the pivot axis (11) in its first bearing (19) in the holder (4) as a fixed bearing and in its second bearing (20) is designed as a floating bearing.

6. Height-adjustable deflection device according to one of claims 1 to 5, characterized in that the

Swivel axis (11) with the housing (24) is integrally formed at least at one bearing point.

7. Height-adjustable deflection device according to one of claims 1 to 6, characterized in that the

Swivel axis (11) at least in the region of one of its two ends has a suitable positive connection, in which the free end (28) of the spring (10) is guided.

8. Height-adjustable deflection device according to one of the preceding claims, characterized in that the spring (10) is designed as a bending spring.

9. Height-adjustable deflection device according to one of the preceding claims, characterized in that it is arranged in the vehicle seat and the housing (24) is partially covered by a diaphragm (18).

10. Height-adjustable deflection device according to one of the preceding claims, characterized in that the roller (12) is convex.

11. Height-adjustable deflection device according to one of the preceding claims, characterized in that the bearings of the roller (12) are designed crowned.

12. Height-adjustable deflecting device according to one of the preceding claims, characterized in that the area around the outlet slot (15) around as from the housing (24) releasable insert part (1) is formed.

13. Height-adjustable deflection device according to one of the preceding claims, characterized in that the outlet slot (15) in its central region (2) and the axis of rotation (13) each extend horizontally and the outlet slot (15) in its two edge regions (3) upwards bent is executed.

14. Height-adjustable deflection device according to one of the preceding claims, characterized in that the basic shape of the housing (24) has a frustoconical, concentric about the pivot axis (11) formed lateral surface (14).

15. Height-adjustable deflection device according to claim 14, characterized in that at the end of the housing (24) with the larger diameter recessed grips (27) are formed. Vehicle seat with a three-point belt having a height-adjustable deflection device according to one of the preceding claims.

Method for height adjustment of the upper stopping point (23) of a three-point belt by means of a height-adjustable deflection device according to one of Claims 1 to 15, in which the housing (24) is pressed against the pressure during rotation in a first direction against a pressure, around the axis of rotation (13 ) is rotated and released, and is moved in rotation in the opposite second direction as in a ratchet mechanism in the freewheel.