WO2014064051A1

WO2014064051A1 - Directly locking and parts-reduced detent fitting having an enlarged cam surface and integrated backrest folding mechanism

Info

Publication number: WO2014064051A1
Application number: PCT/EP2013/071968
Authority: WO
Inventors: Tomas Barkow; Jürgen VON TRZEBIATOWSKI
Original assignee: Sitech Sitztechnik Gmbh
Priority date: 2012-10-27
Filing date: 2013-10-21
Publication date: 2014-05-01
Also published as: DE102012021219A1

Abstract

The invention relates to a detent fitting for a seat, which has a first fixed fitting part (1) and a second pivotable fitting part (3), which are connected to each other in a pivotable manner and the outer or inner teeth (2, 5) of which are meshed in a teeth region in a locking position (I) of the detent fitting, wherein the pivotable fitting part (13) has a cam (16), which is arranged in an opening (15) of the first fixed fitting part (1) and is supported on the second pivotable fitting part (3). According to the invention the cam (16) has a plurality of outer clamping sections (b1-n) that protrude from an outer circumferential surface (A_a) of the cam (16), which reversibly jam the second pivotable fitting part (3) in relation to the first fixed fitting part (1) on radially opposite inner clamping sections in pairs in a locking position (I) by means of rotation of the cam (16) in a locking direction (P2), wherein at least one pair of opposite end-face contact surfaces of the outer and inner clamping sections (b1-n) forms a clamping surface (A-n), which is formed in a first clamping range (V1) in an angle (α) between 45° and 90° to an adjustment direction, wherein the inner clamping sections are formed by expansions (a4-n) in an inner circumferential surface (A_i) of the opening (15) and an unlocking position (II) is caused by means of rotation of the cam (16) in an opening direction (P1), in which unlocking position the outer clamping sections (b1-n) finally lie in the expansions (a4-n) between the inner clamping sections, whereby the teeth region of the outer teeth (2) engaged with the inner teeth (5) is disengaged by means of the pivotable fitting part (3), which is lifted in the adjustment direction.

Description

description

Direct locking and partially reduced detent fitting with enlarged cam surface and integrated backrest mechanism

The invention relates to a locking fitting for a seat having a first fixed fitting part and a second pivotable fitting part, which are pivotally connected to each other and their outer or inner teeth in a locking position of

Detent fitting are engaged, wherein the pivotable fitting part has a cam which is arranged in a recess of the first fixed fitting part and mounted on the second pivotable fitting part.

From the document DE 20 2008 003 706 U1 a fitting for a vehicle seat is known, which has two mutually adjustable fitting parts, which are usually arranged in a blocking position and can be brought to adjust the fitting parts to each other in an unlocking position. The document will be explained in more detail in the description part. The disadvantage of this solution is that the locking bars arranged between guides are not free of play and allow a noticeable play of the fitting parts to each other, so that the backrest is not play in the locked position against a seat part.

Improvement regarding the occurring game bring solutions, as in the

References FR 2 377 175 A1; FR 2 302 882 A1; FR 2 391 089 A1; EP 0 404 628 B1;

EP 0 379 077 B1 and US 4,384,744 A1. In the document FR 2 377 175 A1, the approach is, for example, that no locking latch located between the fitting parts is used more, but a cam is used which is connected to one of the fitting parts, in particular to the seat part fixed fitting part. The document will also be explained in more detail in the description part.

The invention is an object of the invention to provide an improved locking fitting, which is free of play in particular in its locking position and also is able to take high moments. The starting point of the invention is a catch fitting for a seat, the first fixed

Fitting part and a second pivotable fitting part, which are pivotally connected to each other and the outer or inner teeth are in a locking position of the detent fitting into engagement, wherein the pivotable fitting part has a cam which is arranged in a recess of the first fixed fitting part and on the second pivotable Fitting part is stored.

According to the invention, it is provided that the cam has a plurality of outer clamping sections projecting from an outer peripheral surface of the cam.

The outer clamping sections clamp the second pivotable fitting part in pairs reversibly with respect to the first fixed fitting part by rotation of the cam in a locking direction in a locking position on radially opposite inner clamping sections.

At least one pair of opposing end abutment surfaces of the outer and inner clamping portions form a clamping surface, which in a first

Tensioning range of 45 ° to 90 ° to an adjustment is formed.

In this case, the inner clamping sections are formed by extensions in an inner circumferential surface of the recess.

An unlocking position is effected by rotation of the cam in an opening direction in which the outer clamping portions are finally in the extensions between the inner clamping portions, whereby the previously engaged toothing portion of the outer toothing with respect to the internal teeth by the raised in the adjustment direction pivotal fitting part is disengaged ,

In a preferred embodiment of the invention it is provided that the outer clamping portions are formed as substantially rectangular teeth, which are from the outer peripheral surface of a hub of the cam radially outward, while the extensions

corresponding to the outer clamping portions are formed as substantially rectangular teeth, which are starting from the inner peripheral surface of the recess of the fixed fitting part radially into the fixed fitting part.

The formation of the corresponding substantially rectangular teeth of the outer clamping sections and the extensions is a particularly advantageous solution since characterized in the unlocking position, the position of the first to the second fitting part securing engagement of the plurality of outer clamping portions in the plurality of extensions forms.

According to the invention, it is further provided that the several extensions each have a slightly oblique side, so that ramp-like contact surfaces for the outer clamping sections form towards the inner clamping sections located between the extensions.

According to the invention it is further provided that the outer clamping sections are each laterally slightly oblique, so that form ramp-like contact surfaces for the outer clamping sections at the formed between the extensions outer clamping sections.

According to the invention, the inner and / or outer clamping sections are ramp-like

Run-up surfaces on.

This embodiment is advantageous because in the adjustment of the detent fitting of the

Unlocking position back to the locked position a liquid and smooth

Adjusting movement between the fitting parts of the detent fitting results.

In a further preferred embodiment of the invention it is provided that the plurality of inner clamping portions are formed within the recess along the inner circumferential surface between the extensions of the recess. Advantageously, a plurality of inner clamping sections is thereby used, the end faces of which form clamping surfaces in the blocking position relative to the end faces of the outer clamping sections.

There are thus formed in an advantageous manner in the blocking position of the detent fitting several, the jamming of the fitting clamping surfaces. A clamping surface is formed in the locked position by pairs opposite end faces of the inner and outer clamping portions. Each clamping surface forms in locking position a partial clamping surface of a total clamping surface, which is formed of a plurality of pairs opposite end faces of the inner and outer clamping portions.

In a preferred embodiment of the invention are between the extensions

trained end faces of the inner clamping portions with respect to the axis of the fixed fitting eccentric. In addition, the end faces of the outer clamping portions are also formed eccentrically relative to the axis of rotation of the pivotable fitting part. The eccentricities are in opposite directions.

This embodiment has the advantage that a first eccentricity of the end faces of the outer clamping sections and a second eccentricity of the end faces of the inner clamping sections achieve the effect by their opposite orientation that the fitting parts by turning the cam in the reverse direction over the end faces (contact surfaces) of the outer clamping sections and the end faces (contact surfaces) of the inner clamping sections can be braced particularly tight, resulting in a first clamping area a plurality of eccentric surfaces comprising enlarged and strongly clamped clamping surface (of several opposite end faces (contact surfaces) with oppositely oriented

Exzentrizitäten) between the fitting parts of the fitting parts of the detent fitting forms.

In one embodiment variant, the cam has an additional outer clamping section in the manner of a latching arm.

This latching arm is arranged in an open portion of the recess of the fixed fitting part in the manner of an additional extension. An end face of the latching arm is eccentric with respect to the axis of rotation of the pivotable fitting part. In addition, the inner peripheral surface of the pivotable fitting part with respect to the axis of the fixed fitting part in a pivoting region of the cam is also formed eccentrically. The eccentricities are also in opposite directions.

This embodiment has the advantage that a third eccentricity of the end face of the additional latching arm and a fourth eccentricity of the inner peripheral surface of the pivotable fitting part ensure by their opposite orientation that the fitting parts by turning the cam in the reverse direction over the end face of the latching arm on the inner peripheral surface the fixed fitting part - in addition to the clamping surface described above - in the locked position play and even more jam, as the total clamping surface further increased by another eccentric clamping surface, this additional eccentric clamping surface is formed in a second Verspannungsbereiches between the fitting parts. In a development of the detent fitting, it is provided that a backrest folding mechanism comprises a control element and a control groove, which are assigned to the first fixed fitting part and the second pivotable fitting part. The backrest folding mechanism is independent of the clamping surface formed on the outer clamping portions and inner clamping portions of the locking mechanism of the locking fitting in / on the

Fitting trained.

It is preferably provided that the control groove has sections, each one

Folding area associated with a second pivotable fitting part, in particular a backrest are assigned, wherein a central folding area holds in a portion of the cam the locking fitting in its unlocked position and secures, thereby pivoting the pivotable fitting part relative to the first fixed fitting between a front folding area in a further portion of the cam groove and a rear folding area in a still further portion of the cam groove or vice versa is possible without the outer or internal toothing of the

Fitting parts of the detent fitting in its toothed area in the locked position engage.

In a further preferred embodiment of the invention, the first fixed and / or the second pivotable fitting part are formed as a segment, since the toothed region is formed only in the upper region of the fitting parts. Due to the solution found is advantageously ensured that the trained only in the upper area

Gear area is sufficient to absorb the forces acting on the detent fitting forces in normal use and in any crash case. In addition, it comes in an advantageous manner that it by the segment-like configuration in an advantageous manner to a

Weight reduction of the locking fitting comes. Advantageously, the segment is thus substantially not circular, as is usually the case, but the respective

Fitting part is provided in a particularly weight-saving design only semicircular with a semi-circular toothing. It comes in a semi-circular

Design of a fitting part thus to a material savings by half.

Further preferred embodiments of the invention will become apparent from the remaining, mentioned in the dependent claims characteristics.

The invention will be explained in more detail with reference to the accompanying drawings. Show it: Figure 1 shows a first detent fitting with locking bars for locking the

Fittings according to the prior art;

Figures 2A, 2B, a second detent fitting with a cam for locking the

Articulated parts according to the prior art in a locked position (Figure 2A) and in an unlocking position (Figure 2B);

Figures 3A, 3B, a third inventive locking fitting with a novel

Cams for locking the fittings in each case in the blocking position (Figure 3A) in a first embodiment and a second

Variant embodiment (Figure 3B);

FIGS. 4A, 4B, 4C show the third catch fitting according to FIG. 3A in the first embodiment

Variant in each case in an enlarged view in

Lock position (Figure 4A), in an intermediate position (Figure 4B) and in an unlocking position (Figure 4C);

FIGS. 5A, 5B, a sequential representation of the one shown in side views

Rest fitting;

Figures 5C, 5D, 5E at a folding a connected to the catch fitting

Backrest in a rear, middle and front folding area of the backrest;

Figure 6 is a perspective view of an external toothing of a first fixed fitting part with a control groove according to Figure 7 together acting control element for controlling a

Sit folding mechanism;

Figure 7 is a perspective view of an internal toothing of a second pivotable fitting part with the control groove for controlling a backrest folding mechanism, which interacts with the control of Figure 6 together; an enlarged perspective view of the toothed region of the detent fitting in its locking position with the control pin in the cam in the rear folding area of the backrest flap mechanism according to Figure 5A; an enlarged perspective view of the toothed region of the detent fitting in its unlocked position with the

Control bolt in the control groove in the rear folding area of the

Backrest folding mechanism according to Figure 5B; an enlarged perspective view of the toothed region of the detent fitting in its unlocked position with the

Control bolt in the control groove in the middle folding area of the

Backrest folding mechanism according to Figure 5C; an enlarged perspective view of the toothed region of the detent fitting in its locking position in the rear folding area according to Figure 5A and 8A with the control bolt on a rear

End stop of the cam groove of the backrest flap mechanism and an enlarged perspective view of the toothed region of the latching fitting in its locking position in the front folding area according to FIG 5D with the control pin on a front end stop of the control groove of the backrest flap mechanism.

State of the art:

Figure 1 shows a conventional detent fitting according to the document DE 20 2008 003 706 U1. The fitting 1 .1 comprises a first fitting part 1.3 and a second fitting part 1.4, which is rotatable relative thereto. The first fitting part 1.3 is on the backrest of a

Vehicle seat tethered. The second fitting part 1.4 is rotatably connected via an adapter plate 1 .8 connected to the seat part of the vehicle seat. Inside the fitting 1.1 a number of guide elements 1 .9 are visible on the second fitting part 1.4, of which two each form a radial guide track 1.1 1 for a locking bolt 1 .10 arranged therebetween. The three locking latches 1.10 (two of which are visible in FIG. 1), which are displaceably mounted in the radial direction, each have a number on their radially outer end of locking teeth 1.12, which engage in a locking position in each case in a toothing 1.13 on an inner circumference of the first fitting part 1 .3. In the respectively outwardly displaced blocking position of the locking bolt 10, these form (1.12 / 1.13) a locking against the first fitting part 1 .3, so that the two fitting parts 1.3, 1.4 are locked against each other. The fitting 1.1 is thus designed as a catch fitting.

To operate the fitting 1.1 an inner, acting against the locking bolt 1.10 eccentric 1.16 is provided, which is rotatably connected to a link plate 1.18. If by means of an actuating element, not shown, the eccentric 1.16 rotated in the intended direction of actuation, it eliminates their effect against the locking bolt 1 .10, and the crank disc 1 .18 draws by means of corresponding scenes 1 .19 the locking bolt 1 .10 each by arranged thereon pin radially inward. Thus, the locking mechanism between the locking bars 1.10 and the first fitting 1.3 is unlocked. The fittings 1.3, 1 .4 can be rotated freely against each other. After elimination of the action on the eccentric disc 1 .16 this is directed by the spring elements 1 .25 against the locking bar 1.10, which return to their radially outward locking position. The fitting 1 .1 is locked in the adjusted position. On the basis of the vehicle seat shown in Figure 1 on the right is clarified that the between the guide elements 1 .9 arranged locking bolt 1.10 by the provided guideways 1 .1 1 when exposed to a crash force F are not completely free of play and a noticeable game S between the

Fitting 1.3, 1.4 allow each other, so that the backrest is not free of play even in the locked position relative to the seat part.

Figures 2A and 2B show according to the document FR 2 377 175 A1 a known with regard to the existing game improved hinge fitting. In the illustration of Figure 2A, the hinge fitting is shown schematically in the locked position I. In the illustration of Figure 2B, the hinge fitting is shown in unlocking position II. The hinge fitting has a fixed hinge part 2.1 fixed to its seat part and a pivotable hinge part 2.3 attached to the associated backrest, which are pivotally connected to one another via a hinge axis 2.8. At the fixed joint part 2.1 an externally toothed sector gear 2.2 is arranged, which cooperates with an attached to the pivotable joint part 2.3 internal gear segment 2.5. The hinge axis 2.8 is rotatably supported by a bearing hub in a bearing bore in the pivotable joint part 2.3.

At the hinge axis 2.8 engages a hand lever 2.9. On the hinge axis 2.8 is in the region of a recess 2.15 in the fixed joint part 2.1 with the inner wall of this Recess 2.15 cooperating, arranged from a hub 2.13 outwardly extending cam 2.16. The cam 2.16 is provided with a latching section 2.b1, which is assigned to a formed by a portion of the inner wall of the recess 2.15 counter section 2.a1.

If starting from a locking position (locking position I) of the backrest, the inclination of the backrest to be changed, the lever 2.9 is actuated by pivoting. As a result, the latching section 2.b1 of the cam 16 releases from the countersection 2.a1 of the recess 2.15 and a support zone 2.b2 of the cam 16 comes into abutment against a counter support 2.a2 of the recess 2.15. As a result, the joint axis 2.8 is subsequently rotated about the outer end point 2.P of the support zone 2.b2 and thus pivoted upward until the hub 2.13 bears against the countersection 2.a1. In this position, the cam 16 is within an extension 2.a4 and by raising the hinge axis 2.8 and thus the backrest is the internal toothed segment 2.5 out of engagement with the

external toothed segment 2.2. Now, the inclination of the backrest can be adjusted freely. After releasing the hand lever 2.9, the individual parts, both by gravity and by the force of a spring element back into the

Locked position of the backrest relative to the seat part brought back.

Invention:

First embodiment variant (FIG. 3A):

FIGS. 3A and 3B show the latching fitting according to the invention with a novel cam 16 for latching the fitting parts 1 and 3 respectively in the blocking position I in a first embodiment variant (FIG. 3A) and a second variant embodiment (FIG. 3B).

The latching fitting comprises a first fitting part 1 and a second fitting part 3 which is rotatable relative thereto. The first fitting part 1 is firmly connected to a seat part. The second fitting part 3 is pivotable relative to the first fitting part 1, wherein the fitting parts 1, 3 are pivotally connected to each other.

On the fixed fitting part 1 (ratchet wheel) an outer toothing 2 is partially arranged, which cooperates with a latching on the pivotable fitting part 3 internal toothing 5 (ring gear) in a locking position I of the detent fitting latching. The regional outer teeth 2 is in the installed state and analogous to the figures in the upper region of the pivotable fitting part. 3

The external toothing 2 is arranged in a circular segment of up to 160 ° in the upper region of the pivotable fitting part 3 on the end face of the ratchet wheel.

Opposite an imaginary vertical (Z-direction) are thus left and right up to 80 ° of the circular segment of the pivotable fitting part 3 with the external teeth 2 are provided. The external toothing 2 is clearly visible in particular in FIG. 4C in the unlocking position II.

An axle 8, in the manner of a transmission rod, is mounted in a bearing bore 6 of a bearing hub 7 in the pivotable fitting part 3, so that a movement of the

Transmission rod causes a rotation of the bearing hub 7 in one or the other direction.

On the axis 8 engages an unspecified actuator, such as a hand lever or the like to.

On the bearing hub 7 of the axis 8 is in the region of a recess 15 in the fixed

Fitting part 1 a cooperating with the inner wall of this recess 15 cam 16 is arranged.

The cam 16 is configured as a circular hub 13, wherein on an outer circumferential surface A _a (dash-dotted line) of the hub 13 of the cam 16 a plurality of radially projecting outer

Clamping sections b1-n are formed.

In the embodiment, a plurality, in particular six outer clamping sections b1-1, b1 -2, b1-3, b1 -4, b1 -5, b1-6 are formed.

The outer clamping portions b1-n are formed in the embodiment as substantially rectangular teeth, which protrude from the outer peripheral surface A _{a of} the hub 16 radially outward.

The outer circumference of the hub 13 of the cam 16 is determined from the rotational axis Y3 of the pivotable fitting part 3 by the radius r. The end faces of the outer clamping sections b1-1, b1-2, b1-3, b1 -4, b1 -5, b1-6 are eccentric with respect to the axis of rotation Y3 of the pivotable fitting part 3, as is better illustrated in FIGS. 4A to 4C ,

The end faces of the outer clamping sections b1-1, b1-2, b1-3, b1 -4, b1 -5, b1-6 form contact surfaces.

The recess 15 in the fixed fitting part 1 in turn faces a

Inner peripheral surface Aj (dashed line) of the recess 15 in the radial direction outgoing extensions a4-n.

In the exemplary embodiment, a plurality of, in particular six extensions a4-1, a4-2, a4-3, a4-4, a4-5, a4-6 are formed.

The extensions a4-n are in the embodiment corresponding to the outer clamping portions b1 -n also formed as substantially rectangular teeth, however, are formed from the inner peripheral surface A, starting in the fixed fitting part 1 as standing in the fixed fitting part 1 into tooth-like depressions.

Between the extensions a4-n, the recess 15 thus forms inner clamping sections along the inner circumferential surface A. The end faces of the inner clamping sections between the extensions a4-n are eccentric with respect to the axis Y1 of the fixed fitting part 1, as is also better illustrated in FIGS. 4A to 4C.

The end faces of the inner clamping sections form contact surfaces.

In the blocking position I shown in FIG. 3A, the end faces of the outer are located

Clamping sections b1-1, b1-2, b1 -3, b1 -4, b1 -5, b1-6 at the end faces of the inner

Clamping sections between the extensions a4-1, a4-2, a4-3, a4-4, a4-5, a4-6 in pairs, so that a plurality of clamping surfaces A-1, A-2, A-3, A-4, A-5, A-6 are formed from pairs opposite end faces (contact surfaces).

These clamping surfaces A-1, A-2, A-3, A-4, A-5, A-6 together form a novel enlarged cam surface of the cam 16 relative to the recess 15 of the fixed fitting part 1. In the blocking position I, the internal toothing 5 of the detent fitting of the pivotable fitting part 3 engages in the external toothing 2 of the fixed fitting part 1, which is essentially formed in the already described toothing region of the predeterminable circle segment.

As a result, the fitting parts 1, 3 are locked. The latched locking position I is advantageously secured by the enlarged cam surface, which is formed by a plurality of clamping surfaces, that compared to the conventional locking fittings higher

Torques can be recorded.

The eccentricities, namely the first eccentricity of the outer surfaces

Clamping sections b1-1, b1-2, b1-3, b1 -4, b1 -5, b1-6 and the second eccentricity of the end faces of the inner clamping sections, between the extensions a4-1, a4-2, a4-3, a4-4, a4-5, a4-6 are formed, are oriented in opposite directions, so that the fitting parts 1, 3 can be braced by turning the cam 16 counterclockwise over the respective oppositely eccentrically opposite end faces.

Advantageously, by the plurality formed between the end faces

Clamping surfaces A-1, A-2, A-3, A-4, A-5, A-6, which are also referred to as eccentric surfaces because of their eccentric design, a large total clamping surface formed in a first bracing V1, in any Crash case can absorb a high moment, so that an accidental opening of the detent fitting is avoided in relation to the prior art improved way.

The total clamping surface is larger than the prior art and it comes through the trained opposing eccentricities of the pairs opposite faces (contact surfaces) advantageously to a strong tension effect.

In the blocking position I are the axis Y1 and the axis of rotation Y3 of the two fitting parts 1, 3 seen in the axial direction of the detent fitting on an axis.

On the outer peripheral surface A _{a of} the cam 16 and the inner peripheral surface A, the recess 15 are the outer clamping portions b1-n or the

Extensions a4-n and thus distributed between the extensions a4-n inner clamping sections distributed in a special way. FIG. 3A shows a vertical Z-axis. The Z-axis corresponds to the adjustment of the detent fitting.

The cam 16 has a plurality of protruding from the outer circumferential surface A _{a of} the hub 13 of the cam 16 outer clamping sections b1 -n, the second pivotable fitting part 3 relative to the first fixed fitting part 1 (ratchet wheel) by rotation of the cam 16 in a reverse direction P2 in the blocking position I to the radially opposite inner

Clamp the clamping sections reversibly in pairs.

At least one pair of opposing end abutment surfaces of the outer and inner clamping sections b1-n form a clamping surface A-n, which in the first

Tensioning region V1 is formed at an angle α between 45 ° to 90 ° to the adjustment, wherein the inner clamping portions by extensions a4-n in the

Inner peripheral surface A, the recess 15 are formed.

The unlocking position II is effected by rotation of the cam 16 in an opening direction P1 (Figure 4A to Figure 4C), in which the outer clamping portions b1-n are finally in the extensions a4-n between the inner clamping portions, whereby the previously engaged toothing the external teeth 2 against the

Internal toothing 5 is disengaged by the pivotable fitting part 3 raised in the adjustment direction.

In the usual position of use of the backrest is thus at least one with respect to the adjustment laterally arranged and acting clamping surface, which is also referred to as an eccentric surface, arranged for clamping the fitting parts 1, 3 in the locked position I.

For example, in the exemplary embodiment, a first clamping surface A-1 (first eccentric surface) and a sixth clamping surface A-6 (sixth eccentric surface) are arranged.

These two eccentric surfaces A-1, A-6 brace the cam 16 by means of the outer clamping sections b1 -1 and b1 -6 relative to the inner clamping sections, between the extensions a4-1 and a4-2 or below the extension a4-6 at the Inner peripheral surface A, the recess 15 are formed laterally. Laterally means that the clamping surfaces A-1, A-6 are arranged in the first bracing region V1 at the angle α of 45 ° to 90 ° to the adjustment direction. The effect achieved by the lateral tensioning of the clamping surfaces A-1, A-6 arranged in the first bracing region V1 at the angle α between 45 ° to 90 ° to the adjustment direction is that in the first bracing region V1 eccentric surfaces A-1, A -6 are available as clamping surfaces that can absorb forces occurring transversely to the adjustment.

The design with two clamping surfaces A-1, A-6 arranged on both sides of the vertical Z-axis in the clamping region from 45 ° to 90 ° to the adjustment direction is only an example. As can be seen in the figures, a plurality of clamping surfaces A1, A2 or A5, A6 can be arranged in the first bracing region V1 between 45 ° and 90 ° to increase the effect. A single clamping surface A-n arranged in the first bracing region V1 at the angle α between 45 ° and 90 ° to the adjustment direction already effects the clamping surface A-n

effect according to the invention.

When the catch fitting is opened, the fitting part 3 movable relative to the fixed fitting part 1 is raised in the Z direction so that the internal toothing 5 is no longer in engagement with the external toothing 2 of the fixed fitting part 1 (FIG. 4C).

The adjustment direction is thus determined in the Z direction, so that crash forces acting in the Z direction may possibly lead to an unwanted opening of the detent fitting. The supporting forces of the clamping surfaces A-1, A-6 or further clamping surfaces A2, A5, but at least one of the clamping surfaces A-1, A-6 acting substantially laterally orthogonal to the Z-direction or radially to the adjustment axis 8 of the detent fitting / has the effect that the locking fitting is secured in a novel and safer way from accidental opening.

Second embodiment variant (FIG. 3B):

Compared to the first embodiment, the cam 16 in the second

Embodiment modified trained. The recess 15 of the fixed fitting part 1 is - in the opposite direction to the first bracing V1 - formed down U-shaped down.

The first fitting part 1 thus forms a U-shaped open section in the manner of a further extension a4-7, in which a further outer clamping section b1-7 is arranged in the manner of a latching arm. The end face of the locking arm b1 -7 forms a further contact surface A-7, which is formed between its end face and an inner circumferential surface of the pivotable fitting part 3 (ring gear).

On the otherwise existing internal toothing 5 of the pivotable fitting part 3 is omitted in the peripheral region in which the cam 16 is pivoted in a Nockenschwenkbereich B.

Exzentrizitäten, namely the third eccentricity of the end face of the outer clamping portion b1-7 and the fourth eccentricity of the inner peripheral surface of the pivotable fitting part 3, are aligned in opposite directions analogous to the first embodiment, so that the fitting parts 1, 3 by turning the cam 16 counterclockwise can also be braced over the end face of the latching arm b1-7 and the opposite inner peripheral surface.

Advantageously, by the formed between the end face b1-7 and the inner peripheral surface of the pivotable fitting parts 3 very large additional clamping surface A-7

(= seventh eccentric surface) in a second additional bracing region V2 an additional eccentric surface A to the clamping surfaces A-1, A-2, A-3, A-4, A-5, A-6 (eccentric surfaces) within the first bracing region V1 7 trained.

In a possible crash case, an even higher torque can be absorbed by way of two bracing regions V1, V2 in the second embodiment variant than in the first embodiment variant, without the blocking position I being left.

The mode of operation and the further effects according to the invention are explained in more detail starting from the first embodiment variant according to FIG. 3A in connection with FIGS. 4A, 4B, 4C.

4A, 4B, 4C show the detent fitting according to the invention in an enlarged illustration in its locking position I (FIG. 4A), in an intermediate position II-II (FIG. 4B) and in its unlocking position II (FIG. 4C).

The blocking position I shown in FIG. 4A corresponds to the illustration according to FIG. 3A. By actuating the actuating element, not shown, the detent fitting from the illustrated locking position I via the intermediate position L-ll (Figure 4B) in the

Unlocking II (Figure 4C) can be brought.

Starting from Figure 4A, compare Figure 3A, the cam 16 is provided with the first outer clamping portion b1 -1, which is of particular importance. Below the first outer clamping section b1 -1 or below the first extension a4-1 is a radially inwardly projecting from the inner wall of the recess 15 nose arranged in the manner of a counter portion a1.

By pivoting the actuating element and rotation of the cam 16 in

Clockwise direction according to the arrow P1 in the opening direction, the first outer dissolves

Clamping section b1 -1 from the inner clamping section formed between the first and second extensions a4-1, a4-2. The latching fitting assumes the intermediate position l-ll according to Figure 4B.

The first outer clamping portion b1 -1 of the cam 16 forms in the intermediate position L-ll at the side edge of the outer clamping portion b1 -n a support zone b2 through the

Pivoting on the counter portion a1 of the recess 15 comes into abutment, wherein the counter portion a1 forms a counter support a2 with respect to the support zone b2 of the cam 16.

As a result, the axis 8 and thus the bearing hub 7 of the second pivotable fitting part 3 is rotated about the outer end point P of the support zone b2 and at the same time upwards

pivoted until the outer clamping sections b1-n finally engage in the extensions a4-n and no further movement of axle 8 and bearing hub 7 in the adjustment direction (Z-direction) is allowed more.

The axis 8 of the pivotable fitting part 3 is thus raised relative to the fixed fitting part 1, so that the internal teeth 5 of the pivotable fitting part 3 according to FIG 4C no longer with the described circle segment of the upper semicircle of

Detent fitting formed external teeth 2 of the fixed fitting part 1 is in latching engagement.

At the now no longer concentric axis crosses of the axis Y1 of the fixed

Fitting part 1 and the axis of rotation Y3 of the pivotable fitting part 3 is shown in Figure 4C clearly that the axis of rotation Y3 of the pivotable fitting part 3 is now above the axis Y1 of the fixed fitting part 1. Now, the inclination of the backrest can be adjusted freely.

By releasing the actuating element, not shown, or by an active rotational movement of the actuating element counterclockwise according to the arrow P2 in the closing direction, the fitting parts 1, 3 both by the operation and by gravity or by the force of a spring element, not shown in the Lock position I (Figure 4A) with the depending on the variant enlarged cam surface returned.

At least one unspecified spring element ensures a restoring

Spring tension between ratchet 1 (fixed fitting) and cam 16. The at least one spring element is attached to the ratchet wheel 1 and the cam 16, in particular mounted. During the movement from the blocking position I to the unlocking position II, the at least one spring element is tensioned. The clamping force is used for the provision as soon as the adjusting force acting in unlocking position II decreases.

In a preferred embodiment of the invention, the extensions a4-n are each laterally slightly beveled, so that the ramps between the extensions a4-n inner clamping sections ramp-like for the outer

Form clamping sections b1-n. This results in an advantageous manner the effect that the respective rotational movement of the cam 16 takes place in one or the other direction P1, P2 very liquid.

In particular, in Figure 4B is at the moment of the intermediate position l-ll best seen that the end faces of the outer clamping sections b1 -1, b1 -2, b1-3, b1-4, b1 -5, b1 -6, the first eccentricity and the End faces of the inner clamping portions between the extensions a4-1, a4-2, a4-3, a4-4, a4-5, a4-6 have the second eccentricity, which are aligned in opposite directions, so that the fitting parts 1, 3 as mentioned by turning the cam 16 counterclockwise in the reverse direction P2 over the respective ones

Tense end faces eccentrically.

For the described up to here directly between the fitting parts 1, 3 locking latch fitting a backrest folding mechanism is also created. The solution found has the advantage that the backrest flap mechanism is independent of the locking mechanism of the directly locking fittings 1, 3.

The novel direct-locking catch fitting thus has a backrest folding mechanism, which allows in the unlocked position II of the Council fitting to effect a backrest folding with a defined Vorklappbereich. The pre-lapping area is for example part of an easy-entry function, in which first a backrest R of a vehicle seat is folded forward and the vehicle seat is then moved to a front position. The locking fitting according to the invention is thereby also suitable for vehicle seats, in which an easy-entry function should be feasible. It is understood that the

Backrest folding mechanism can also be used independently of an easy-entry function.

The backrest flap mechanism according to the invention will be explained in detail with reference to Figures 5A, 5B, 5C, 5D, 5D-1 and Figures 6, 7 and 8A, 8A-1 8B, 8C, 8D-1.

Figures 5A, 5B, 5C, 5D, 5D-1 show first in a sequential representation of the process of a Lehnenklappung a backrest R.

The backrest R is located in FIG. 5A in a backrest use position a, which is inclined slightly in the vehicle, a. The axis Z1 of the backrest R is shown in Figure 5A analogous to the preceding figures. The latching fitting is located in the blocking position I in FIG. 5A, which is illustrated and described in conjunction with FIG. 4A.

In this backrest use position a latching fitting but also the

Take unlocking II according to Figure 5B.

The backrest R is in Figure 5B also in the usual in the vehicle slightly reclined backrest use position a. However, the latching fitting is in Figure 5B in the unlocked position II, which is shown and described in connection with Figure 4C.

The latching fitting can thus assume the blocking position I or unlocking position II in the backrest use position a according to FIG. 5A, 5B.

It has already been explained with reference to FIGS. 4A to 4B that the unlocking position II is brought about by rotation of the cam 16 in an opening direction P1, in which the outer Clamping sections b1-n are finally located in the extensions a4-n between the inner clamping sections, whereby the previously engaged toothed area of the outer toothing 2 with respect to the inner toothing 5 is disengaged by the pivotable fitting part 3 raised in the adjustment direction.

A rotation of the cam 16 in the reverse direction, that is in the locked position I causes the previously disengaged toothing of the external teeth 2 of the first, fixed fitting 1 relative to the internal teeth 5 of the second, pivotable fitting part 3 by the pivotable fitting part lowered in the adjustment direction 3 engages.

As further explained previously to Figure 4C, is from the lock position I in the

To unlock position II, the axis 8 of the pivotable fitting part 3 raised by rotation of the cam 16 in the opening direction P1 relative to the fixed fitting part 1, so that the internal teeth 5 of the pivotable fitting part 3 according to Figure 4C no longer with the described circle segment of the upper semicircle of

It is clear from the description that the fitting parts 1 and 3 of the detent fitting in the movement from the locking position I to the unlocking II and vice versa take place taking place in the radial direction relative movement to each other, since the second, pivotable fitting part 3 relative to the first, fixed fitting part 1 is lowered in the locking position I of the detent fitting in the Z direction or raised in the unlocked position II of the detent fitting in the Z direction.

That is, as long as a relative movement of the fitting parts 1, 3 is allowed to each other, an adjustment of the detent fitting from the locking position I to the unlocked position II and vice versa is possible. Based on this knowledge, the following solution is based on

Sit folding mechanism.

The backrest R is located in Figure 5C in a slightly opposite the vertical Z-axis forward inclined backrest liner b, in which no passenger on the

Vehicle seat can take place. The catch fitting is located in Figure 5C in the

Entriegelungsposition II and can not return to its locking position I, as will be explained. The backrest R is located in FIG. 5D in a backrest non-use position c, which is inclined forwards more than in FIG. 5C with respect to the vertical Z axis, in which likewise no passenger can sit on the vehicle seat. The backrest non-use position c corresponds for example to a desired front

Non-use position within the already exemplified easy-entry function of a vehicle seat. The catch fitting is in Figure 5D in the unlocked position II.

However, as shown in FIG. 5D-1, it can return to its locked position I in the backrest non-use position c by rotating the cam 16 in the opening direction P1 so as to lower the swingable fitting 3 with respect to the fixed fitting 1, thereby preventing the backrest 1 from being tilted Internal toothing 5 of the pivotable fitting part 3 according to Figure 4A again with the described circle segment of the upper semicircle of the detent fitting

trained external teeth 2 of the fixed fitting part 1 is in latching engagement.

The latching fitting can thus assume the unlocking position II or the blocking position I in the backrest non-use position c according to FIGS. 5D, 5D-1.

FIG. 6 shows the first, fixed fitting part 1 with the external toothing 2. Axially protruding from the surface of the first fitting part 1 spanned in the radial direction, a control element 11 is designed in the manner of a circular control pin or control pin. It is expressly understood that the control element 1 1 is described only in the embodiment as a cylindrical control pin. The control 1 1 can others

have geometric shapes.

The control pin 1 1 is removed in a predetermined radial distance r1 1 from the axis Y1 of the fixed fitting part 1.

The control pin 1 1 is arranged on the vertical Z-axis of the fixed fitting part 1. The control pin 1 1 thus represents a fixed position fixed point.

The formation of the control pin 1 1 takes place for example during the manufacture of the first fitting part 1 in a fine cutting process and by stamping the control pin, which precision parts of above-average dimensional accuracy can be produced with smooth surfaces. FIG. 7 shows the second pivotable fitting part 3 with the one not visible in FIG

Internal toothing 5. In the second fitting part 3, a cam groove 31 is formed. The formation of the cam groove 31 takes place during the production of the second fitting part 3, for example, also in a fine blanking process. The second, pivotable fitting part 3 is formed in the embodiment as a semi-circular and thus advantageously as a weight and material-saving segment.

The control groove 31 has at its one end a rear stop 31 H and at its other end a front stop 31V. The control groove 31 is located within a total circle sector SK _G , on whose circle radii the end stops 31 H and 31 V are formed. The end stops 31 H and 31 V limit the control groove 31 on both sides.

A circular arc line of the cam groove 31 runs along a circular arc B, which is represented with respect to the rotational axis Y3 of the second, pivotable fitting part 3, at a predeterminable radial distance r31 from the axis of rotation Y3.

The arcuate line of the cam groove 31 intersects an imaginary vertical cut line in the Z direction such that the cam groove 31 splits into two lengthwise predetermined cam groove portions in a vertical Z direction position of the seat back R.

In other words, starting from the imaginary vertical cutting line in the Z direction Z, the length of the Steuerutbereich shown on the left in Figure 7 to the front stop 31V determines the folding angle of Lehnenklappung forward and the length of the control groove shown in Figure 7 right to the rear Stop 31 H the folding angle of the backrest folding backwards.

The position of the front stopper 31V of the control groove 31 within the second

Fitting part 3 determines the folding angle of the backrest R in the Lehnenklappung forward, in particular in connection with the described easy-entry position.

The position of the rear stop 31 V of the control groove 31 within the second fitting part 3 determines the folding angle of the backrest R at the Lehnenklappung backwards.

The distance r1 1 of the control pin 1 1 from the axis Y1 of the first, fixed

Fitting part 1 and the distance r31 of the circular arc line of the cam groove 31 of the rotational axis Y3 of the second, pivotable fitting part 3 coordinated such that the axial center of the control pin 1 1 is arranged on the circular arc line of the cam 31 as soon as the fitting parts 1, 3 are in their unlocked position II.

It is clarified in the following FIGS. 8A to 8C that the distance between the axis Y1 of the first fitting part 1 and the axis Y3 of the second fitting part 3 corresponds to an unlocking path ΔΖ of the catch fitting.

The control groove 31 also has, within the overall circular sector SK _G, an a-section aA which is associated with a rear folding region of the backrest R inclined backwards.

The control groove 31 also has within the overall circular sector SK _G a b-section bA, which is associated with a central folding area between the rearwardly inclined backrest R and the forwardly inclined backrest R.

Finally, the control groove 31 has, within the overall circular sector SK _G, a c-section cA which corresponds to a front folding region of the backrest R inclined forwards

assigned.

The length of the control groove 31 along the circular arc line as a whole and the length of the individual sections aA, bA, cA is variable, so that advantageously the total folding area and the individual folding areas of the backrest R can be variably determined taking into account the stationary position of the control pin 1 1 /can.

According to the invention, it is further ensured that the control groove 31 in the b-section bA, that is, in the central folding area within the overall circular sector SK _{G is formed} such that a lateral surface of the control pin 1 1 on a directed to the control pin 1 1 area the control groove 31 is present. In the b-section bA, the cam groove 31 at the top of a directed to the circular arc collection 40. That is, the cam groove 31 is formed narrower in the b-section bA, which is associated with the central flap area, compared to the adjacent portions aA, cA, so that in the unlocked position II a

Relative movement of the first fitting part 1 relative to the second fitting part 3 is prevented, as will be explained.

It is achieved in an advantageous manner that the latching fitting after he has been brought into the unlocked position II, in the folding of the backrest R of the rear folding area, that is, from the backward inclined backrest use position a in the front folding area, that is held in the forwardly inclined backrest non-use position c in its unlocked position II, as long as the b-section bA of the cam 31 is guided within the central folding area on the fixed control pin 1.

This folding between the rear folding area and the front folding area in which the locking in the b-section b-A is prevented is referred to as free-pivoting.

The second pivotable fitting part 3 can thus not return to its locking position I during the free pivoting, since it is held in a position relative to the first fixed fitting part 3 as shown in FIG. 8C and guided and held within the middle section bA in the control groove 31 in which the second pivotable fitting part 3 can not be countersunk in the Z direction into the locking position I of the catch fitting. Such a lowering into the blocking position I of the second pivotable fitting part 3 is possible, as already explained, only in the adjacent sections a-A and c-A.

It is understood that the effect within the central folding area occurs analogously as soon as a folding of the backrest R from the front folding area, that is from the forwardly inclined backrest non-use position c over the middle folding area

(Backrest liner b) in the rear folding area, that is, takes place in the backward inclined backrest use position a.

Figures 5A (side view) and 8A (perspective view) illustrate in a synopsis of the rear folding area in the backrest use position a, wherein the latching fitting is in the locked position I.

Figures 5B (side view) and 8B (perspective view) illustrate in an overview also the rear folding area in the backrest use position a, wherein the locking fitting is here in the unlocked position II.

In FIG. 8B, the circular arc line B and the a section aA of the overall circular sector SK _{G are} plotted. It can be seen in FIGS. 5A, 8A that the axial center of the

Steuerbolzens 1 1 in the locked position I of the detent fitting above the arc of the control groove 31 is located. In FIGS. 5B, 8B, the axial center of the control pin 1 1 lies in the unlocked position II of the detent fitting on the circular arc line of the control groove 31. Within the rear folding area thus the adjustment of the detent fitting from the locking position I to the unlocked position II and vice versa is possible. The unlocking in the unlocking II completed Entriegelungsweg ΔΖ of the detent fitting, the distance between the axis Y1 of the fixed fitting part 1 and the axis Y3 of

pivotable fitting part Y3 corresponds, is shown in Figure 8B.

Figures 5C (side view) and 8C (perspective view) illustrate in a synopsis of the central folding area in the backrest intermediate layer b, wherein the locking fitting is in the unlocked position II.

In FIG. 8C, the circular arc line and the b-section bA of the overall circular sector SK _{G are} plotted.

It is visible in FIGS. 5C, 8C that the axial center point of the control pin 1 1 in the unlocking position II of the detent fitting lies exactly on the circular arc line of the control groove 31.

Within the middle folding range, therefore, the adjustment of the detent fitting from the unlocking position II to the blocking position I is not possible. In an advantageous manner, the control groove 31 formed in the b-section b-A ensures that the catch fitting in the

Unlocking position II is secured, as long as it is folded in one or the other direction in the region of the b-section bA of the overall circular sector SK _G.

The directed to the confinement 40 radial lateral surface is located in the section b-A on the directed to the control pin 1 1 surface of the cam groove 31 and prevents in section b-A lowering of the second pivotable fitting part 3 relative to the first fixed fitting part. 1

The Entriegelungsweg ΔΖ of the detent fitting, which corresponds to the distance between the axis Y1 of the fixed fitting part 1 and the axis Y3 of the pivotable fitting part Y3 when unlocking in the unlocked position II, is plotted in both Figure 8B and Figure 8C. In these figures, the locking fitting in unlocking position II.

For further clarification, Figure 8A-1 shows, in addition to Figures 5A and 5B and 8A, the backrest use position a in the rear folding area, wherein the

Detent fitting in Figure 8A-1 in the locked position I at the rear stop 31 H is located, that is, the cam 31 strikes with its rear stop 31 H to the control pin 1 1. Further 8A-1 show that the axial center of the control pin 1 1 in the locked position I of the detent fitting above the arc of the control groove 31 is located.

Finally, FIG. 8D-1 shows, in addition to FIGS. 5D and 5D-1, the backrest non-use position c in the front folding area according to section cA, the latching fitting in FIG. 8D-1 in the blocking position I according to FIG. 5D-1 at the front stop 31V is located, that is, the cam 31 beats with its front stop 31 H at the

Control bolt 1 1 on.

It is also visible in Figure 8D-1 that the axial center of the control pin 1 1 in

Locking position I of the locking fitting above the arc of the control groove 31 is located.

From the preceding description of the figures is mathematically clear that the second pivotable fitting part 3 relative to the first fixed fitting part 1, starting from the in the blocking position I by overcoming a Entriegelungsweges ΔΖ enters its unlocking position II.

Since the radial distance r1 1 of the control pin 1 1 from the axis Y1 of the first fixed

Fitting part 1 is fixed, changes as a comparison line, the position of the circular arc line 31 of the second pivotable fitting part 3 in unlocking II relative to the locking position I, wherein the radial distance r31 plus the unlocking ΔΖ the position of the circular arc line of the cam 31 in the unlocked position II of the detent fitting is defined.

Figures 5A, 5B, 5C, 5D, 5D-1 and Figures 6, 7 and 8A, 8A-8B, 8C, 8D-1 illustrate another aspect of the invention.

It has already been explained that at the first, fixed fitting part 1 (ratchet wheel) the

External teeth 2, which arranged with the on the pivotable fitting part 3

Internal toothing 5 (ring gear) latching in the locking position I of the detent fitting

cooperates, is arranged only partially. The external teeth 2 of the fixed fitting part 1 is in the installed state and analogously in the figures in the upper region of the pivotable fitting part 3. The outer toothing 2 is in particular in a circular segment of up to 160 ° in the upper region of the pivotable fitting part 3 on the front side of the Ratchet wheel arranged. This embodiment makes it possible to produce the second, pivotable fitting part 3 analog only as a circle segment. This segmental Design of the pivotable fitting part 3 leads to an advantageous manner

Weight reduction of the detent fitting. The necessary clamping forces between the directly locking fitting parts 1, 3 are achieved despite the segment-like design of the pivotable fitting part 3 on the clamping surface, which is already formed as already explained by the outer and inner clamping sections.

From the description, the required components of the means of fitting parts 1, 3 directly locking detent fitting become clear.

Compared with a conventional latching fitting used by way of example according to DE 20 2008 003 706 U1, which is shown in FIG. 1, components are advantageously reduced. The total of three, slidably mounted in the radial direction locking bolt 1 .10 (two of them visible in Figure 1) can be omitted. Furthermore, the link plate 1.18 shown in Figure 1 is not needed. In addition, the interacting with the locking bars 1.10 spring elements 1.25 can be omitted. The latching fitting according to the invention is thereby also referred to as - partially reduced - latching fitting. Advantageously, material is saved and the weight of the detent fitting is further reduced. In addition, the latching fitting only slightly expanded in the y-direction and thus requires little space, whereby the latching fitting is elegantly integrated between the seat part and backrest R in a vehicle seat.

LIST OF REFERENCE NUMBERS

Reference numerals - prior art

1 1 fitting

1 3 first fitting part

1 4 second fitting part

1 8 adapter plate

1 9 guide element

1 10 locking bar

1 1 1 guideway

1 12 locking teeth

1 13 toothing

1 16 eccentric disc

1 18 link plate

1 19 backdrop

1 25 spring element

s game

Reference numerals - prior art

2.1 fixed joint part

2.2 external toothed segment

2.3 pivoting joint part

2.5 internal toothed segment

2.8 Joint axis

2.9 Hand lever

2.13 hub

2.15 recess

2.16 cams

2.a1 counter section recess

2.b1 locking section cams

2.a2 counter-support

2.b2 support zone cam 2.a4 extension

2P endpoint

I blocking position

II unlocking position

Reference numeral - invention

1 first fixed fitting part

2 external teeth

3 second pivotable fitting part

5 internal toothing

6 bearing bore

7 bearing hub

8 axis

13 hub

15 recess

16 cams

b1 -n outer clamping sections of the cam (n = 1, 2, 3, 4, 5, 6, ...)

b1 -7 outer clamping section (latching arm)

a1 counterpart section

a2 counter-support

b2 support zone cams

a4-n extension (n = 1, 2, 3, 4, 5, 6, ...)

a4-7 extension for b1 -7

A-n clamping surfaces / eccentric surfaces of the clamping sections (n = 1, 2, 3, 4, 5, 6, ...)

A-7 Clamping surface / eccentric surface of the locking arm

Ai Inner peripheral surface of the recess (dashed line)

A _a outer circumferential surface of the cam (dot-dash line)

P endpoint

r radius

Z vertical direction, vertical axis

Z1 axis of the backrest

ΔΖ unlocking path

Y1 axis of the fixed fitting part

Y3 axis of rotation of the swiveling fitting part

I blocking position II unlocking position

l-ll intermediate position

P1 arrow opening direction

P2 arrow reverse direction

B Cam swing range

V1 first tension area

V2 second tension range

α angle

R backrest

a backrest use position

b Backrest liner

c backrest non-use position

1 1 control bolt

r11 radial distance from Y1

31 tax credit

r31 radial distance from Y3

31 H rear stop

31V front stop

40 confiscationSK _G total circular sector

B circular arc

a-A a section

b-A b section

c-A c section

Claims

claims

1. catch fitting for a seat having a first fixed fitting part (1) and a second

pivotable fitting part (3), which are pivotally connected to one another and whose outer or inner toothing (2, 5) engage in a locking position (I) of the catch fitting in a toothed area, wherein the pivotable fitting part (3) has a cam (16) arranged in a recess (15) of the first fixed fitting part (1) and mounted on the second pivotable fitting part (3), characterized in that the cam (16) a plurality of, from a

Outer peripheral surface (A _a ) of the cam (16) projecting outer clamping portions (b1-n), the second pivotable fitting part (3) relative to the first fixed fitting part (1) by rotation of the cam (16) in a locking direction (P2) in a blocking position (I) at radially opposite inner clamping sections in pairs reversibly clamp, wherein at least one pair of opposing frontal contact surfaces of the outer and inner clamping sections forms a clamping surface (An), in a first tension region (V1) at an angle α between 45 ° and 90 ° to an adjustment direction is formed, wherein the inner clamping portions are formed by extensions (a4-n) in an inner peripheral surface (A,) of the recess (15), and an unlocking position (II) by rotation of the cam (16) in a

Opening direction (P1) is effected, in which the outer clamping portions (b1 -n) are finally in the extensions (a4-n) between the inner clamping portions, whereby the previously engaged toothed portion of the outer toothing (2) against the internal toothing (5) by the raised in the adjustment second pivotable fitting part (3) is disengaged.

2. latching fitting according to claim 1, characterized in that the second pivotable fitting part (3) has a cam (16) bearing layer hub (7).

3. latching fitting according to claim 1, characterized in that an axis (8) in the manner of a transmission rod in a bearing bore (6) of the bearing hub (7) in the second pivotable fitting part (3) is mounted so that a movement of the

Transmission rod causes a rotation of the on the bearing hub (7) arranged cam (16) in one or the other direction.

4. latching fitting according to claim 1, characterized in that the outer clamping portions (b1-n) are formed as substantially rectangular teeth which protrude from the outer peripheral surface (A _a ) of a hub (13) of the cam (16) radially outward, while the extensions (a4-n) correspond to the outer ones

Clamping sections (b1-n) are formed as substantially rectangular teeth, which are radially from the inner peripheral surface (A,) of the recess (15) of the first fixed fitting part (1) in the first fixed fitting part (1).

5. locking fitting according to claim 1, characterized in that the inner

Clamping portions within the recess (15) along the inner peripheral surface (A,) between the extensions (a4-n) of the recess (15) are formed.

6. locking fitting according to claim 1, characterized in that between the

Extensions (a4-n) formed end faces of the inner clamping portions relative to the axis (Y1) of the first fixed fitting part (1) are formed eccentrically.

7. latching fitting according to claim 1, characterized in that the end faces of the outer clamping portions (b1 -n) relative to the axis of rotation (Y3) of the second

pivotable fitting part (3) are eccentric.

8. locking fitting according to claim 6 and 7, characterized in that a first

Eccentricity of the end faces of the outer clamping portions (b1-n) and a second eccentricity of the end faces of the inner clamping portions which between the

Extensions (a4-n) are formed, are aligned in opposite directions, so that the fitting parts (1, 3) by a rotation of the cam (16) in the reverse direction (P2) over the end faces of the outer clamping portions (b1-n) and the end faces the inner clamping sections can be braced, whereby a plurality of eccentric surfaces (A1 -n; n = 6) comprising enlarged clamping surface between the fitting parts (1, 3) in a first bracing region (V1) is formed.

9. latching fitting according to claim 1, characterized in that the cam (16) has an additional outer clamping portion (b1 -7) in the manner of a latching arm in an open portion of the recess (15) of the first fixed fitting part (1) in the type of an additional extension (a4-7) is arranged.

10. locking fitting according to claim 9, characterized in that an end face of the latching arm (b1-7) with respect to the axis of rotation (Y3) of the second pivotable fitting part (3) is eccentric.

1 1. Detent fitting according to claim 1, characterized in that an inner peripheral surface of the second pivotable fitting part (3) relative to the axis (Y1) of the first fixed fitting part (1) in a pivoting region of the cam (16) is eccentric.

12. locking fitting according to claim 10 and 1 1, characterized in that a third

Eccentricity of the end faces of the additional locking arm (b1-7) and a fourth eccentricity of the inner peripheral surface (A,) of the recess (15) of the second pivotable

Fitting part (3) are aligned in opposite directions, so that the fitting parts (1, 3) by a rotation of the cam (16) in the reverse direction (P2) over the end face of the latching arm (b1-7) on the inner peripheral surface (A,) of the first solid fitting part (1) can additionally brace, whereby a plurality of cam surfaces (A1 -n; n = 7) comprising further enlarged clamping surface in a first and second bracing region (V1, V2) between the fitting parts (1, 3) is formed.

13. latching fitting according to claim 1, characterized in that the extensions (a4-n) are each laterally slightly bevelled, so that to the between the extensions (a4-n) lying inner clamping sections down ramp-like contact surfaces for the outer clamping sections (b1 -n) form.

14. latching fitting according to claim 1, characterized in that the outer clamping sections are each laterally slightly oblique, so that at the between the

Extensions (a4-n) formed outer clamping sections (b1-n) ramp-like

Forming contact surfaces for the inner clamping sections.

15. latching fitting according to claim 1, characterized in that a

Lehnenklappmechanik a control (1 1) and a control groove (31), which are associated with the first fixed fitting part (1) and the second pivotable fitting part (3), wherein the backrest folding mechanism independently of the on the outer

Clamping sections (b1-n) and inner clamping portions formed clamping surface (An) of the locking mechanism of the locking fitting in / on the fitting parts (1, 3) is formed.

16. Detent fitting according to claim 15, characterized in that the control groove (31) has sections (aA, bA, cA) which are each associated with a folding region of a second pivotable fitting part (3) component, in particular a backrest (R) in which a middle folding area in a b-section (bA) of the control groove (31) holds, guides and secures the detent fitting in its unlocking position (II), thereby pivoting the pivotable fitting part (3) relative to the first fixed fitting part (1) a front folding area in a c-section (cA) of the control groove (31) and a rear folding area in an a-section (aA) of the control groove (31) or vice versa is possible without the external or internal toothing (2, 5) the fitting parts (1, 3) of the detent fitting in its toothed area in the locking position (I) engage.

17. latching fitting according to claim 14, characterized in that the second pivotable fitting part (3) is formed as a segment.