EP3621489B1 - Pivot fitting and piece of furniture - Google Patents

Description

The present invention relates to a swivel fitting according to the preamble of claim 1 and to a piece of furniture with such a swivel fitting.

A generic swivel fitting is for example from EP 2 767 188 A1 known. Another swivel fitting is from the EP 2 544 567 B1 known. In the pivot fitting disclosed there, two levers can be fixed relative to one another via a latching mechanism. One of these levers can be attached to a base body or seat part of a piece of furniture such as upholstered furniture, while the second lever is used, for example, to fix a pivotably mounted headrest, which is fixed in predetermined locking steps with the help of the pivot fitting from an initial position.

In order to change this fixing position further in the adjustment direction, the locking fitting can be pivoted further in a simple manner. On the other hand, in order to achieve a new latching position that was already passed through during the previous setting process, it is necessary to pivot the latching fitting completely into an end position and from there to pivot the latching fitting back into its basic position in order to then move the latching fitting back into the initial pivoting direction to pivot into the desired locking step.

The object of the present invention is to provide a swivel fitting in which the adjustment process from a first to a second latching position can be carried out even more easily.

This object is achieved with a swivel fitting with the features of claim 1.

The object is also achieved by a piece of furniture with such a swivel fitting according to claim 17.

The pivot fitting according to the invention, in particular for movable furniture parts on furniture, is defined in claim 1. It has a first lever and a second lever which are mounted pivotably relative to one another about a common axis from a basic position through a predetermined angle.

With a clamping mechanism of the swivel fitting, the two levers can be fixed relative to one another in different angular positions within the predetermined angle.

The clamping mechanism has a toothing fixed in a rotationally fixed manner on the second lever, at least one pawl which is pivotably mounted on the first lever and loaded in the direction of the toothing and which is in engagement with the toothing in a latching position. The clamping mechanism also has a control disk rotatably mounted about the common axis, with which the at least one pawl can be disengaged from the toothing in an adjustment direction after the predetermined angle has been exceeded from the basic position, so that when the pawl is disengaged from the toothing the two levers can be pivoted back into the basic position by driving over the predetermined angle in a return direction.

According to the invention, the control disk can be carried along in a frictionally engaged manner on the toothing and is mounted rotatably by a switching angle relative to the first lever.

With such a swivel fitting it is now possible to stop this swiveling process in an intermediate position even when the levers are swiveled to one another in the return direction and to lock the levers in a desired position without the two levers first having to be swiveled back into the basic position.

Advantageous design variants of the invention are the subject of the subclaims.

According to one embodiment variant, the clamping mechanism has a first spring element with which the control disk is pressed against the toothing in a frictionally engaged manner. The first spring element is preferably designed as a plate spring or spring plate.

A spring element designed in this way is inexpensive to manufacture and can be installed in a simple manner in the clamping mechanism and ensures sufficient frictional contact between the control disk and the toothing.

According to another embodiment, the control disk is designed as a plate spring or spring plate. This makes it possible to save the first spring element.

The frictional entrainment of the control disk with the toothing can take place both directly through direct contact between the control disk and the toothing and indirectly through frictional entrainment of the control disk by a further component connected non-rotatably to the toothing.

For the permanent application of force to the at least one pawl, the clamping mechanism has a second spring element with which the at least one pawl can be pressed against the toothing.

According to a first advantageous embodiment variant, the toothing is designed as at least one at least part-circular toothed disk with external toothing formed on a part-circular outer edge, which is coupled to the second lever via a power shaft. The pawl has a swivel arm with teeth facing the axis of rotation of the lever.

The toothing is preferably designed in the form of two part-circular toothed disks, the control disk being arranged between the toothed disks so that the pressure of the first spring element on one of the part-circular toothed disks causes the control disk to be sufficiently frictionally clamped between the two part-circular toothed disks so that the Control disk, depending on the application of force, either moves with the toothed disks or moves relative to the toothed disks.

In a corresponding manner, the pawl is preferably formed in two parts from two pawl elements, one of the pawl elements being arranged in a plane with one of the toothed disks, so that in each case one of the pawl elements is in operative connection with one of the toothed disks in the latching position.

In order to move the control disk relative to the toothed disks, it preferably has a recess in which a control bolt attached to the first lever is received. The recess is dimensioned such that the control bolt can be displaced by the switching angle relative to the control disk.

A switchover contour is preferably provided at a distance from the recess on an outer circumference of the control disk, with which the pawl can be pivoted from a latching position with the toothing into a non-latching position. In a latching position of the pawl, the switchover contour lies in a tooth of the intended recess of the pawl adjacent to the teeth that form an internal toothing.

According to a further preferred embodiment variant, the edges of the pawl bordering the recess serve as support surfaces for supporting the pawl on the switching contour of the control disk.

This makes it possible to keep the pawl out of engagement with the toothing both when the levers are pivoted relative to one another in the adjustment direction and in the return direction.

According to a preferred embodiment variant, the switchover contour is shaped such that the pawl is held out of engagement with the toothing, supported on a first support surface of the switchover contour, when the levers are adjusted relative to one another in the adjustment direction from a predetermined adjustment angle.

When the levers are adjusted relative to one another in the adjustment direction, this enables silent adjustment, since the pawl does not come into engagement with the toothing due to the support on the switching contour and thus ensures silent adjustment.

According to an alternative embodiment variant, the switchover contour is shaped in such a way that the pawl is guided in contact with the toothing when the levers are adjusted relative to one another in the adjustment direction.

This variant of the switching contour enables an audible locking of the pawl when moving in the adjustment direction.

In both variants, the desired latching position is slightly exceeded, so that when the swivel fitting is loaded and the lever is pivoted relative to it in the return direction, the pawl slips down from the switching contour of the control disc and engages in the toothing.

According to a further alternative embodiment variant, the toothing is designed as circular internal toothing arranged on the second lever, and the at least one pawl has a swivel arm with teeth facing away from the axis of rotation of the lever.

This embodiment variant of a swivel fitting according to the invention also enables the levers to be locked to one another, even in the return movement, due to the control disc lying frictionally on the toothing.

In this embodiment variant, the control disk preferably has at least one elongated hole in which a fixing and control bolt attached to the first lever is received.

The longitudinal extension of the elongated hole is dimensioned such that the fixing and control bolt can be displaced by the switching angle relative to the control disk without moving the control disk itself relative to the second lever.

Furthermore, in this embodiment variant, the control disk preferably has a switching contour protruding from the plane of the control disk in the direction of the pawl, spaced from the elongated hole, with which the pawl can be pivoted from a locking position with the toothing into a non-locking position.

The switchover contour is preferably designed as a tab punched out of an annular disk of the control disk and bent towards the pawl. This tab fixes the latch in the non-latching position.

According to a further alternative embodiment variant, the toothing itself is designed as a circular internal toothing formed on a lever head of the second lever.

In an alternative embodiment variant, the toothing is designed as a circular toothed disk with internal toothing formed thereon and held between the lever heads of the second lever.

In a further alternative embodiment variant, the cover, the toothing and the control disk is accommodated between the lever heads, the second spring element between the lever heads, the toothing and the Control disk circumferentially encompassing, is arranged. In addition to the pressure on the pawl, the second spring element also enables the toothing, the control disc and the pawl to be protected from dirt, which further increases the service life of the swivel fitting.

Figur 1

eine perspektivische Explosionsdarstellung einer ersten Ausführungsvariante eines erfindungsgemäßen Schwenkbeschlages,

Figur 2

eine Draufsicht auf den zweiten Hebel gemäß Figur 1 mit daran festgelegter Verzahnung,

Figur 3

eine Seitenansicht des ersten Hebels gemäß Figur 1 mit daran befestigten Klinken,

Figur 4

eine Draufsicht auf die Steuerscheibe gemäß Figur 1,

Figur 5

eine schematische Draufsicht auf den Schwenkbeschlag gemäß Figur 1 mit weggelassenem ersten Deckel in einer Grundstellung,

Figur 6

eine der Figur 5 entsprechende Darstellung des Schwenkbeschlages in einer ersten Rastposition,

Figur 7

eine vergrößerte Ansicht eines Ausschnitts des Schwenkbeschlages gemäß Figur 5 bei weiter in Verstellrichtung verschwenkten Hebeln mit aus dem Eingriff mit der Verzahnung gebrachte Klinke,

Figur 8

eine der Figur 7 entsprechende Darstellung mit alternativer Ausführungsvariante der Steuerscheibe, bei der die Klinke bei Verstellung der Hebel zueinander in Verstellrichtung von einer Rastposition in die nächst Rastposition gleitet,

Figur 9

eine Draufsicht entsprechend Figur 5 in einer Rastposition,

Figur 10

eine Draufsicht auf den Schwenkbeschlag gemäß Figur 5 in der Umschaltposition, bei der die beiden Hebel um den gesamten möglichen Winkel zueinander aus der Grundstellung heraus verschwenkt sind,

Figur 11

eine der Figur 5 entsprechende Darstellung des Schwenkbeschlages während einer Verschwenkung in Rückstellrichtung,

Figur 12

eine der Figur 5 entsprechende Darstellung des Schwenkbeschlages in einer Position vor Umstellung der Bewegungsrichtung der Hebel zueinander in Verstellrichtung,

Figuren 13 und 14

der Figur 5 entsprechende Darstellungen des Schwenkbeschlages während der Bewegung in Verstellrichtung bzw. Belastungsrichtung zur Erreichung der in Figur 14 gezeigten Rastposition,

Figur 15

eine perspektivische Explosionsdarstellung einer alternativen Ausführungsvariante eines erfindungsgemäßen Schwenkbeschlages mit am zweiten Hebel vorgesehener Innenverzahnung,

Figuren 16a und 16b

unterschiedliche Ansichten einer bei dem Schwenkbeschlag gemäß Figur 15 eingesetzten Steuerscheibe,

Figur 17

eine der Figur 5 entsprechende Darstellung eines in Figur 15 gezeigten Schwenkbeschlages in der Grundstellung der Hebel,

Figur 18

eine der Figur 17 entsprechende Darstellung des Schwenkbeschlages in der maximal zueinander verschwenkten Stellung der Hebel,

Figur 19

eine der Figur 18 entsprechende Darstellung des Schwenkbeschlages während der Bewegung der Hebel zueinander in Rückstellrichtung mit durch die Lappen außer Eingriff gehaltener Klinke,

Figuren 20 und 21

den Figuren 13 und 14 entsprechende Darstellungen des Schwenkbeschlages bei Umschaltung der Hebel bei der Bewegung in Rückstellrichtung zurück in die Verstellrichtung,

Figuren 22 und 23

weitere perspektivische Explosionsdarstellungen weiterer Ausführungsvarianten erfindungsgemäßer Schwenkbeschläge,

Figur 24

eine perspektivische Explosionsdarstellung einer weiteren Ausführungsvariante eines erfindungsgemäßen Schwenkbeschlages,

Figur 25

eine perspektivische Ansicht einer weiteren Ausführungsvariante einer mit einer Kraftwelle einstückig ausgebildeten Verzahnung,

Figur 26

eine perspektivische Ansicht einer weiteren Ausführungsvariante einer Klinke,

Figur 27

eine perspektivische Ansicht der Verzahnung gemäß Figur 25 mit daran festgelegter Steuerscheibe,

Figur 28

eine Seitenansicht auf die Verzahnung gemäß Figur 27,

Figuren 29 und 30

Draufsichten auf die Verzahnung gemäß Figur 27 mit zwei Steuerscheiben mit unterschiedlich ausgestalteten Umschaltkonturen, und

Figuren 31 bis 33

perspektivische Darstellungen eines Polstermöbels mit Armlehne in unterschiedlichen Rastpositionen.

In the following, exemplary embodiments of the invention are explained with reference to the accompanying drawings. Show it:

Figure 1

a perspective exploded view of a first variant of a swivel fitting according to the invention,

Figure 2

a plan view of the second lever according to Figure 1 with fixed teeth,

Figure 3

a side view of the first lever according to Figure 1 with pawls attached,

Figure 4

a plan view of the control disk according to Figure 1 ,

Figure 5

a schematic plan view of the swivel fitting according to Figure 1 with the first cover left out in a basic position,

Figure 6

one of the Figure 5 corresponding representation of the swivel fitting in a first locking position,

Figure 7

an enlarged view of a section of the swivel fitting according to Figure 5 with levers pivoted further in the adjustment direction with the pawl disengaged from the toothing,

Figure 8

one of the Figure 7 Corresponding representation with an alternative design variant of the control disc, in which the pawl slides from one latching position into the next latching position when the levers are adjusted relative to one another in the adjustment direction,

Figure 9

a top view accordingly Figure 5 in a rest position,

Figure 10

a plan view of the swivel fitting according to Figure 5 in the switchover position, in which the two levers are pivoted to each other by the entire possible angle from the basic position,

Figure 11

one of the Figure 5 Corresponding representation of the swivel fitting during a swiveling in the return direction,

Figure 12

one of the Figure 5 Corresponding representation of the swivel fitting in a position before the direction of movement of the levers is changed to one another in the adjustment direction,

Figures 13 and 14

of the Figure 5 Corresponding representations of the swivel fitting during the movement in the adjustment direction or loading direction to achieve the in Figure 14 shown locking position,

Figure 15

a perspective exploded view of an alternative embodiment of a swivel fitting according to the invention with internal teeth provided on the second lever,

Figures 16a and 16b

different views of one in accordance with the swivel fitting Figure 15 used control disc,

Figure 17

one of the Figure 5 corresponding representation of an in Figure 15 swivel fitting shown in the basic position of the lever,

Figure 18

one of the Figure 17 Corresponding representation of the swivel fitting in the maximally swiveled position of the levers,

Figure 19

one of the Figure 18 Corresponding representation of the swivel fitting during the movement of the levers to each other in the return direction with the pawl held out of engagement by the tabs,

Figures 20 and 21

the Figures 13 and 14th Corresponding representations of the swivel fitting when switching the lever when moving in the return direction back into the adjustment direction,

Figures 22 and 23

further perspective exploded views of further design variants of swivel fittings according to the invention,

Figure 24

a perspective exploded view of a further embodiment of a swivel fitting according to the invention,

Figure 25

a perspective view of a further embodiment variant of a toothing formed in one piece with a power shaft,

Figure 26

a perspective view of a further embodiment of a latch,

Figure 27

a perspective view of the toothing according to Figure 25 with fixed control disc,

Figure 28

a side view of the toothing according to Figure 27 ,

Figures 29 and 30

Top views of the toothing according to Figure 27 with two control disks with differently designed switching contours, and

Figures 31 to 33

perspective views of upholstered furniture with armrests in different locking positions.

In the following description of the figures, terms such as above, below, left, right, front, rear, etc. relate exclusively to the exemplary representation and position of the swivel fitting, the lever, the toothing, the pawl, the control disk and the like selected in the respective figures. These terms are not to be understood as restrictive, ie these references may change as a result of different working positions or the mirror-symmetrical design or the like.

In the Figures 31 to 33 Reference numeral 500 denotes a piece of furniture designed here as upholstered furniture, which is designed here as seating furniture, in particular as an armchair, with a body 501, a backrest 502 and an armrest or headrest 503. The armrest or headrest 503 is in different positions attached to the body 501 so as to be latched. A swivel fitting, provided here with the reference numeral 1, with which it is possible to move the armrest or headrest 503 from the in FIG Figure 31 basic position shown in Figure 32 angled position shown in Figure 33 to adjust the shown upright position and to lock in these respective positions.

With the pivot fitting 1, for which various design variants of pivot fittings 100, 200, 300 are described below, it is also possible to use this arm or headrest 503 from the embodiment shown in FIG Figure 33 position shown in Figure 32 to adjust the position shown without first moving the armrest or headrest 503 into Figure 31 to have to pivot back the basic position shown.

A first variant of a swivel fitting suitable for such an adjustment is described below with reference to FIG Figures 1 to 14 described.

Further embodiments are based on the Figures 15 to 30 described.

All the design variants have in common that a swivel fitting 1, 100, 200, 300, 400 has a first lever 2, 120, 220, 320, 420 and a second lever 3, 130, 230, 330, which around a common axis D consists of a Basic position are mounted pivotable to each other through a predetermined angle α.

The pivot fitting 1, 100, 200, 300, 400 also has a clamping mechanism with which the two levers 2, 120, 220, 320, 420, 3, 130, 230, 330 in different angular positions within the predetermined angle α relative to one another are fixable.

The clamping mechanism has a toothing 4, 140, 240, 340, 440 fixed in a rotationally fixed manner on the second lever 3, 130, 230, 330 and at least one pivotably mounted on the first lever 2, 120, 220, 320, 420 and in the direction of the toothing 4 , 140, 240, 340, 440 loaded pawl 5, 150, 250, 350,450, which is in a latching position in engagement with the toothing 4, 140, 240, 340, 440.

The clamping mechanism also has a control disk 7, 170, 270, 370, 470 which is rotatably mounted about the common axis D and with which the at least one pawl 5, 150, 250, 350, 450 moves from the basic position in an adjustment direction V can be brought out of engagement with the toothing 4, 140, 240, 340, 440, so that when the pawl 5, 150, 250, 350 is disengaged from the toothing 4, 140, 240, 340, 440 by overriding the predetermined Angle α in a return direction R, the two levers 2, 120, 220, 320, 420, 3, 130, 230, 330 can be pivoted back into the basic position.

The control disk 7, 170, 270, 370, 470 can be carried along with frictional engagement on the toothing 4, 140, 240, 340, 440 and is rotatably supported by a switching angle β relative to the first lever 2, 120, 220, 320, 420.

In the Figures 1 to 14 The first embodiment variant illustrated, the first lever 2 consists of two essentially structurally identical covers, namely a first cover 2a and a second cover 2b.

Each of these covers 2a, 2b has a lever arm 21 which merges into a lever head 23 via a bending region 22. In the lever head 23, a circular receptacle 25 is provided, which serves to lead through a power shaft 6 with a polygonal outer surface.

Instead of the polygonal shape of the power shaft and the non-rotatably coupled components assigned to it, any other shape that creates a positive connection, such as a tongue and groove connection, can of course be selected between the lever heads 23 of the first cover 2a and the second cover 2b the toothing 4 and the control disk 7 are added. In this embodiment variant, the toothing 4 is designed in the form of two part-circular toothed disks 4a, 4b.

Each of the toothed disks 4a, 4b has an external toothing formed on a partially circular outer edge. The toothed disks 4a, 4b are provided with a recess 44 with a polygonal cross section corresponding to the power shaft 6 for receiving the power shaft 6.

The power shaft 6 extends through the receptacles 25 of the first cover 2a and the second cover 2b, the toothed disks 4a, 4b, a spring element 10 and through a receptacle 33 of the second lever 3, which also has a polygonal cross section corresponding to the power shaft 6, so that the toothing 4 is rotatably coupled to the second lever 3.

As can be seen in FIGS. 1 and 3, the pawl 5 used for locking with the toothing 4 is composed of two pawl elements 5a, 5b in this variant, with one of the pawl elements 5a, 5b in a plane with one of the toothed disks 4a, 4b is arranged.

The pawl elements 5a, 5b are pivotably mounted on the first lever 2 via a pawl bolt 9. For this purpose, each of the pawl elements 5a, 5b has a bearing bore 53 in which the pawl bolt 9 is received. The pawl pin 9 extends between the two lever heads 23 of the first cover 2a and the second cover 2b.

The control disk 7 is received between the two part-circular toothed disks 4a, 4b. A top view of such a variant embodiment of a control disk 7 is shown in FIG Figure 4 shown. The control disk 7 consists essentially of a ring 71 with a central recess 72 through which the power shaft 6 extends in the assembled state, but is not coupled to it in a rotationally fixed manner.

The control disk 7 has on an outer circumference a recess 73 in which a control bolt 8 extending on the first lever 2, here between the lever heads 23 of the first cover 2a and the second cover 2b, is received. The recess 73 is dimensioned in such a way that the control pin 8 can be displaced by the switching angle β relative to the control disk 7.

In the embodiment variant shown here, the width of the recess 73 in the circumferential direction is correspondingly greater than the diameter of the control pin 8. The width of this recess 73 is dimensioned such that the control disk 7 is displaceable by the switching angle β relative to the control pin 8 and the pawl pin 9.

To apply the force necessary for the frictional engagement of the control disk 7 on the toothing 4, the first spring element 10, which is designed as a plate spring and which, as in the Figures 1 and 2 shown, on the one hand rests on the lever head 32 of the second lever 3 and on the other hand on the end face of a bearing ring 13, which presses with a neck piece through the receptacle 25 of the second cover 2b of the first lever 2 against an end face of the second toothed part 4b.

The counterpressure is brought about by a neck piece of the power shaft 6 that extends through the receptacle 25 of the first cover 2a and rests against the end face of the first toothed part 4a.

In order to always press the pawl 5, here the two pawl parts 5a and 5b, in the direction of the external toothing 42 of the toothing 4, a second spring element 11 is provided, which is arranged between the lever heads 23 of the first cover 2a and the second cover 2b and the Completely encloses the gap. The two lower ends of this second spring element 11, which is designed here as a leaf spring and also serves to cover the gap between the lever heads 23 of the first cover 2a and the second cover 2b, are bent in the direction of the latch elements 5a, 5b and thus press the Ratchet elements 5a, 5b steadily in the direction of the external toothing 42 of the two toothing parts 4a, 4b.

A central bolt 12, which extends through a central bore in the power shaft 6 into a counter disk 14 on the outside of the lever head 32 of the second lever 3, is preferably used to axially fix the components of the swivel fitting 1.

The function of the swivel fitting 1 is based on the Figures 5 to 14 described.

In Figure 5 a basic position of the swivel fitting 1 is shown with the clamping mechanism exposed.

The one in the Figures 5 to 14 The sequence of movements shown is the second lever 3 stationary, while the first lever 2 for adjustment on its in Figure 5 basic position shown in an adjustment direction V (in Figure 5 counterclockwise) is pivoted relative to the second lever 3.

A movement of the first lever 2 relative to the second lever 3 opposite to the adjustment direction V is referred to as the return direction R.

As in Figure 5 As shown, the control disk 7 is positioned in the basic position such that a second support surface 76 of a switching contour 74 of the control disk 7 rests on a second support surface 56 of the pawl 5, whereby the teeth 52 of the pawl 5 are out of engagement with the toothing 4.

In this position, the control bolt 8 rests against a right side edge of the recess 73 of the control disk 7.

If the first lever 2 is now pivoted in the adjustment direction V relative to the second lever 3, the control pin 8 in the recess 73 of the control disk 7 is moved away from the right side edge in the direction of the left side edge.

At the same time, the pawl 5, which is fixedly but pivotably attached to the first lever 2 via the fixing bolt 9, is moved in the adjustment direction V. As a result, the switching contour 74 slips down from the second support surface 56 of the pawl 5 and dips into the recess 54 of the pawl 5.

In this case, the pawl 5 is pressed into the external toothing 42 of the toothing 4 into a first latching position by means of the second spring element 11. Reaching this first locking position can be heard when the pawl 5 hits the toothing 4. This first latching position preferably takes place when the first lever 2 is pivoted relative to the second lever 3 by 5 °.

During this first pivoting movement, the control disk 7 is held in a frictionally locking manner between the two toothed parts 4a and 4b. The frictional holding of the control disk 7 between the toothing parts 4a, 4b of the toothing 4 is effected, as described above, by the first spring element 10, which is designed here as a disk spring.

It is also conceivable to use an O-ring or a screw acting on one of the toothing parts 4a, 4b, with which the amount of friction could be adjusted.

If the first lever 2 is moved further in the adjustment direction V, the control pin 8 finally comes to rest on the left side edge of the recess 73 of the control disk 7.

From a predetermined adjustment angle γ after an in Figure 7 A first support surface 75 of the switching contour 74 of the control disk 7 is pushed onto a first support surface 55 of the pawl 5 to the left of the recess 54 and thus takes the teeth 52 of the pawl 5 out of engagement from the external toothing 42 of the toothing 4, so that when a Further pivoting of the first lever 2 in the adjustment direction V, the pawl 5 is held out of engagement with the toothing 4 by the joint movement with the control disk 7. The control disk 7 is moved along with the control bolt 8 fixed in place on the first lever 2.

In order to assume a latching position, the second lever 2 is moved slightly in the return direction R due to the preferred shape of the teeth of the toothing 4 and the teeth 52 of the pawl 5, preferably by an angle of approximately 2 degrees.

The switchover contour 74 of the control disk 7 slips back into the recess 54 of the pawl 5, so that the teeth 52 of the pawl 5 latch with the external toothing 42 of the toothing 4. Such an angular position of the swivel fitting 1 is exemplified in Figure 9 shown.

At the in Figure 8 The alternative embodiment shown is the geometry of the switchover contour 74 'of the control disk 7 different from the switchover contour 74 (shown in FIG Figure 7 ), to the effect that the switching contour 74 'has a smaller angular width, so that the pawl 5 when the first lever 2 moves further out of the position shown in FIG Figure 6 position shown is moved in the adjustment direction V from one locking position to the next.

The geometry of the teeth 52 of the pawl 5 and the external toothing 42 of the toothing 4 is selected so that a shift in the adjustment direction is made possible and a shift in the return direction is hindered.

In Figure 10 a switching position is shown in which the first lever 2 is pivoted by the maximum adjustment angle α with respect to the second lever 3. In this position the teeth 52 of the pawl 5 are on an elevation 43 of the Toothing 4 pushed on, so that the teeth 52 of the pawl 5 are lifted out of engagement with the external toothing 42 of the toothing 4.

When the first lever 2 is subsequently pivoted relative to the second lever 3 in the return direction R, the control disk 7 remains stationary in its position, again due to the frictional mounting between the toothing parts 4a and 4b of the toothing 4, until the control pin 8 reaches the in Figure 11 reached the left edge of the recess 73 of the control disk 7.

During this swivel movement into the in Figure 11 In the position shown, the second support surface 76 of the control disk 7 is in turn pushed onto the second support surface 56 of the pawl 5, so that the pawl 5 is still kept out of engagement with the toothing 4 and thereby enables the pivoting of the first lever 2 in the return direction R.

If, during the pivoting of the first lever 2 in the return direction R, the pivot fitting 1 is now to be latched again in such an intermediate position before the basic position is reached, for example in the position shown in FIG Figure 12 position shown, it is only necessary to move the first lever 2 slightly in the adjustment direction V.

Since the control pin 8 moves within the recess 73 of the control disc 7 during this pivoting movement, the control disc 7 remains stationary in place due to friction during this pivoting movement.

The pawl 5 itself is pushed down by the pivoting movement of the second support surface of the switchover contour 74 of the control disk 7, so that the teeth 52 of the pawl 5 engage with the external toothing 42 of the toothing 4. This position is in Figure 14 shown.

The following is the same sequence of movements for an alternative embodiment of a swivel fitting 100 according to the invention with reference to FIG Figures 15 to 21 described.

The swivel fitting 100 works on the same principle. Here, too, a control disk 170 is pressed against a toothing 140 with a friction fit.

In contrast to the Figures 1 to 14 The embodiment variant shown here, the toothing 140 is designed as an internal toothing integrated in the lever head 132 of the second lever 130.

In this embodiment variant, the second lever 130 is mounted between the first cover 120a and the second cover 120b of the first lever 120.

Instead of the power shaft 6, a central bolt 102 is used to define the pivot axis D, which is received in a bore 124 of the two covers 120a, 120b and in a receptacle 135 in the lever head 132 of the second lever 130.

The swivel fitting 100 here has two pawls 150 which are spaced apart from one another and are arranged point-symmetrically about the axis of rotation D and are provided with external teeth 152 in accordance with the internal teeth 140 on the second lever 130.

The pawls 150 are fixed in a rotationally fixed manner on the first cover 120a and the second cover 120b in respective receptacles 125 via respective fixing and control bolts 180, 190.

The pawls 150 are pressed against the toothing 140, which is designed as internal toothing, by a second spring element 101, preferably designed as a U- or V-shaped bent leaf spring, with which the teeth 152 of the pawls 150 are pressed into the internal toothing of the toothing 140.

The control disk 170 has as in Figure 16 can be seen in this case an annular disc 171 with a central bearing opening 172 through which the central bolt 102 extends.

In the annular disk 172, elongated holes 173 are also provided through which the fixing and control bolts 180, 190 extend. The length of these elongated holes 173 is designed according to the angular width of the recess 73 of the control disk 7 of the first embodiment in order to allow a pivoting movement of the first lever 120 relative to the second lever 130 by a predetermined angle without the control disk 170 being rotated.

The preferably four switchover contours 174 of the control disk 170 are formed in this embodiment as tabs punched out of an annular disk 171 and bent towards the pawl 150, as is exemplified in FIG Figures 16a and 16b is shown.

For improved alignment of the control disk 170 in a plane parallel to the planes of the lever heads 123 of the first cover 120a and the second cover 120b, the bearing opening 172 is bordered by a cylindrical neck piece 175.

The first spring element 110 is, as in FIG Figure 15 shown, designed as an annular spring plate which is fixed in place on the second lever 130 via pins 133.

The pressure force acting axially towards the toothing 140 is brought about by support tongues 111 which are integrally formed on the first spring element 110 and are oriented radially inward, which ensures the necessary frictional engagement between the control disk 170 and the toothing 140.

In the lever head 133 of the second lever 130, elongated holes 134 are provided, which are used to receive the fixing and control bolts 180, 190. The length of these elongated holes 134 is dimensioned such that the two levers 120, 130 can be pivoted relative to one another by the predetermined angle α to one another.

Figure 17 shows the basic position of the two levers 120, 130 relative to one another. In this basic position, the two pawls 150 are out of engagement with the internal toothing of the toothing 140.

For this purpose, the switching contours 174 designed as tabs rest on a second support surface 156 of the pawls, as shown in FIG Figure 17 is shown.

When the first lever 120 is pivoted relative to the second lever 130, the pawls 150 are correspondingly moved by the switching contours 174 (in Figure 17 clockwise) so that the teeth 152 of the pawls 150 engage with the internal teeth of the toothing 140.

Figure 18 shows the switching position of levers 120, 130 with respect to one another, pivoted by the maximum angle α. In this position, some of the teeth 152 of the pawls 150 are pushed onto an elevation 141 of the toothing 140.

In the exemplary embodiment shown, this elevation 141 is molded onto the toothing 140.

However, it is also conceivable to design the elevation 141 as a mountable insert that is placed on a corresponding position of the toothing 140.

As in Figure 18 It can also be seen that in this switchover position the fixing and control bolts 180, 190 rest on the front edge of the elongated holes 173 of the control disk 170 in the adjustment direction V.

If the first lever 120 is moved relative to the second lever 130 during the subsequent pivoting in the return direction R, the pawls 150 are again pushed onto the switching contour 174 of the control disk 170, which is stationary at the beginning of the pivoting movement, so that as in FIG Figure 19 shown, a second support surface 156 of the pawls 150 rests on the switching contours 174 designed as tabs.

During the subsequent further movement of the first lever 120 relative to the second lever 130 in the return direction, the pawls 150 together with the control disk 170 carried by the fixing and control bolts 180, 190, resting on the switchover contours 174, are moved in the return direction without entering the teeth of the toothing 140 click into place.

If a latching position is to be assumed again during the pivoting of the levers 120, 130 to one another in the return direction, the first lever 120 must first be moved a little in the adjustment direction V relative to the second lever 130, as shown in FIG Figure 20 is shown.

The pawls 150 are moved away from the respective switchover contour 174, so that the teeth 152 of the pawls 150 strike the toothing 140, so that by a subsequent slight pivoting of the first lever 120 relative to the second lever 130 in the return direction R the in Figure 21 shown locking position is reached.

The Figures 22 and 23 show exploded views of further design variants of a pivot fitting 200, 300 according to the invention.

The pivot fittings 200, 300 essentially correspond to that based on FIG Figures 15 to 21 swivel fitting 100 described.

Accordingly, those in the Figures 22 and 23 assigned reference numerals according to the in Figure 15 shown variant.

In contrast to the swivel fitting 100, described with reference to FIG Figures 15 to 21 , is at the in Figure 22 The pivot fitting 200 shown, the toothing 240 is formed on a separate ring body 241.

The toothing 243 is also designed here as internal toothing into which the teeth 252 of pawls 250 engage.

The ring body 241 of the toothing 240 has, analogously to that in FIG Figure 1 The pivot fitting 1 shown has a polygonal receptacle 242 into which a power shaft 260 engages.

The power shaft 260 also engages in the second lever 230, there in a correspondingly shaped receptacle 233 with a polygonal cross section, so that the second lever 230 is coupled to the toothing 240 in a rotationally fixed manner.

The first spring element 210 and the control disk 270 are corresponding to those in FIGS Figures 15 to 21 embodiment of the swivel fitting 100 described.

At the in Figure 23 The embodiment variant of a pivot fitting 300 according to the invention shown in the figure, the toothing 340 is again formed directly on the second lever 330 analogously to the embodiment variant of the pivot fitting 100 described in FIGS.

In this embodiment variant, the first rotary lever 320 is designed such that a lever head 322, which has a receptacle 323 with a polygonal cross section, extends in a straight line from a lever arm 321.

The cover of the first lever 320, which includes the clamping mechanism, are designed here as separate components 324, 325, so that accordingly the first cover 324 and the second cover 325 have corresponding central recesses 327 with a polygonal cross section, so that the covers 324, 325 are rotationally fixed to the first lever 320 are coupled.

Figure 24 shows an exploded view of a further embodiment of a swivel fitting 400 according to the invention without showing the second lever, which is preferably the one in Figures 1 to 14 shown first embodiment corresponds to lever 3 described.

The swivel fitting 400 corresponds in essential parts to that based on FIG Figures 1 to 14 swivel fitting described 1.

Accordingly, those in the Figures 24 to 30 assigned reference numbers corresponding to the in Figure 1 first variant shown.

In contrast to the swivel fitting 1, the in Figure 24 The swivel fitting 400 shown only has a toothing 440 formed on an annular body 441.

The toothing 440 is formed in one piece with the power shaft 460, in particular as a sintered part. The power shaft 460 is designed for a non-rotatable connection to the second lever, not shown here, with a polygonal outer contour 461, for example. The power shaft 460 also has a receptacle 462 in which the central bolt 12 is received.

This structure also means that the second lever is coupled to the toothing 440 in a rotationally fixed manner.

The control disk 470 is in this variant, as in Figure 28 shown, designed as a plate spring or spring plate which is arranged laterally on the ring body 441 of the toothing 440.

An annular disk 480 pushed onto a section of the power shaft 460 presses the control disk 470 under pretension against the annular body 441 of the toothing 440. To attach this annular disk 480 to the section of the power shaft 460, the annular disk 480 is, for example, in the manner of a shaft lock with a press fit onto the outer contour 461 the power shaft 460 pressed. It is also conceivable to weld the annular disk 480 to the power shaft 460. It is conceivable to provide an undercut on the outer contour 461 of the power shaft 460, which can be pressed onto the annular disk 480. About that In addition, it is also conceivable to hold down the washer 480 with a locking ring or to replace it with one.

It is also conceivable to press the annular disk 480 against the control disk 470 during assembly by means of a suitably selected distance between the lever heads 423 of the first cover 420a and the second cover 420b, e.g. using suitable spacers.

The annular disk 480 has tongues 482 extending radially inward from an annular base body 481 to prevent rotation with respect to the power shaft 460, as in FIG Figure 27 is shown.

As in Figure 24 shown, in this embodiment variant the swivel fitting 400 accordingly also has only one pawl 450. This pawl 450 is, as in Figure 26 In contrast to the first embodiment variant, it is formed in one piece with a pawl bolt 490, preferably as a sintered part, and is pivotably mounted on the first lever 420 via this. This simplifies assembly due to the reduced number of components.

In the Figures 29 and 30th For direct comparison, two control disks 470 with differently configured switchover contours 474, 474 ′ are arranged on the toothing 440.

In the Figure 29 The switching contour 474 shown corresponds to the variant described with reference to the first exemplary embodiment, the switching contour 474 being shaped in such a way that the pawl 450 when the levers are adjusted relative to one another in the adjustment direction from a predetermined adjustment angle, supported on a first support surface 475 of the switching contour 474, is held out of engagement with the toothing is what, as described above, enables silent adjustment when the levers are adjusted relative to one another in the adjustment direction, since the pawl 450 does not come into engagement with the toothing 440 due to the support on the switchover contour 474.

At the in Figure 30 The switching contour 474 'shown is missing this first support surface 475, so that the pawl 450 is guided in contact with the toothing 440 when the levers 420, 3 are adjusted relative to one another in the adjustment direction.

This variant of the switching contour enables an audible locking of the pawl when adjusting in the adjustment direction.

In the aforementioned application examples of the invention for adjusting backrests, armrests, footrests or headrests on furniture, there is generally a horizontally aligned pivot axis D of the movable furniture part relative to the furniture body.

It should be noted that other applications in which the pivot axis is oriented vertically or obliquely in space are also possible. For example, a backrest of a chair can also be rotated about a vertical pivot axis D, so that one does not adjust the backrest inclination, but the angular position of the backrest in space.

List of reference symbols

1

Swivel fitting

2

first lever

2a

first lid

2 B

second lid

21st

Lever arm

22nd

Bending area

23

Lever head

24

drilling

25th

admission

26th

drilling

27

Recess

28

stiffening

3

second lever

31

Lever arm

32

Lever head

33

admission

4th

Interlocking

4a

first toothed part / toothed disc

4b

second toothed part / toothed disc

41

Toothed ring piece

42

External toothing

43

Elevation

44

Recess

5

pawl

5a

first latch part

5b

second latch part

51

Latch arm

52

teeth

53

Bearing bore

54

Recess

55

first support surface

56

second support surface

6th

Power wave

7th

Control disk

71

ring

72

Recess

73

Recess

74

Switching contour

74 '

Switching contour

75

first support surface

76

second support surface

8th

Control pin

9

Latch bolt

10

first spring element

11

second spring element

12th

Central bolt

13th

Bearing ring

14th

Counter washer

100

Swivel fitting

101

second spring element

102

Central bolt

110

first spring element

111

Support tongue

120

first lever

120a

first lid

120b

second lid

121

Lever arm

122

Bending area

123

Lever head

124

drilling

125

admission

130

second lever

131

Lever arm

132

Lever head

133

Pin code

134

Long hole

135

admission

140

Interlocking

141

Elevation

150

pawl

151

Latch arm

152

teeth

153

Bearing bore

154

155

first support surface

156

second support surface

170

Control disk

171

Washer

172

Warehouse opening

173

Long hole

174

Switching contour

175

Neck piece

176

Recess

180

Fixing and control bolts

190

Fixing and control bolts

200

Swivel fitting

201

second spring element

210

first spring element

211

Support tongue

220

first lever

220a

first lid

220b

second lid

221

Lever arm

222

Bending area

223

Lever head

224

drilling

225

admission

230

second lever

231

Lever arm

232

Lever head

233

admission

240

Interlocking

241

Ring body

242

admission

243

Internal gearing

244

Long hole

245

Pin code

250

pawl

251

Latch arm

252

teeth

253

Bearing bore

260

Power wave

270

Control disk

271

Washer

272

Warehouse opening

273

Long hole

274

Switching contour

275

Neck piece

276

Recess

280

Fixing and control bolts

290

Fixing and control bolts

300

Swivel fitting

301

second spring element

310

first spring element

311

Support tongue

320

first lever

321

Lever arm

322

Lever head

323

admission

324

first lid

325

second lid

326

admission

327

admission

330

second lever

331

Lever arm

332

Lever head

333

admission

334

Long hole

335

Pin code

340

Interlocking

350

pawl

351

Latch arm

352

teeth

353

Bearing bore

360

Power wave

370

Control disk

371

Washer

372

Warehouse opening

373

Long hole

374

Switching contour

375

Neck piece

376

Recess

380

Fixing and control bolts

390

Fixing and control bolts

400

Swivel fitting

420

first lever

420a

first lid

420b

second lid

421

Lever arm

422

Bending area

423

Lever head

424

drilling

425

admission

426

drilling

427

Recess

440

Interlocking

441

Gear ring body

442

External toothing

443

Elevation

450

pawl

451

Latch arm

452

teeth

454

Recess

455

first support surface

456

second support surface

460

Power wave

461

Outer contour

462

admission

470

Control disk

471

ring

472

Recess

473

Recess

474

Switching contour

474 '

Switching contour

475

first support surface

476

second support surface

480

Washer

481

Washer body

482

Outer contour

500

Furniture

501

Body

502

backrest

503

armrest

D.

axis

V

Adjustment direction

R.

Return direction

α

maximum adjustment angle

β

Switching angle

Y

predetermined adjustment angle

Claims (18)

1. A pivot fitting (1, 100, 200, 300, 400), in particular for movable furniture parts on pieces of furniture, comprising

   - a first lever (2, 120, 220, 320, 420) and a second lever (3, 130, 230, 330) which are mounted so they are pivotable in relation to one another around a common axis (D) out of a base position by a predetermined angle (α),

   - a clamping mechanism, using which the two levers (2, 120, 220, 320, 420, 3, 130, 230, 330) are fixable in relation to one another in different angle positions within the predetermined angle (α),

   - wherein the clamping mechanism comprises:

   a. a toothing (4, 140, 240, 340, 440) secured in a rotationally-fixed manner on the second lever (3, 130, 230, 330),

   b. at least one pawl (5, 150, 250, 350, 450), which is mounted so it is pivotable on the first lever (2, 120, 220, 320, 420) and is loaded in the direction of the toothing (4, 140, 240, 340, 440), and which is engaged with the toothing (4, 140, 240, 340, 440) in a catch position,

   c. a control disk (7, 170, 270, 370, 470) mounted so it is rotatable around the common axis (D), using which the at least one pawl (5, 150, 250, 350, 450) can be disengaged from the toothing (4, 140, 240, 340, 440) after running over the predetermined angle (α) from the base position in an adjustment direction (V), so that if the pawl (5, 150, 250, 350, 450) is disengaged from the toothing (4, 140, 240, 340, 440) by running over the predetermined angle (α) in a reset direction (R), the two levers (2, 120, 220, 320, 420, 3, 130, 230, 330) are pivotable back into the base position,

   characterized in that

   - the control disk (7, 170, 270, 370, 470) can be carried along on the toothing (4, 140, 240, 340, 440) while bearing thereon indirectly or directly in a friction-locked manner and is mounted so it is rotatable by a switching angle (β) in relation to the first lever (2, 120, 220, 320, 420).
2. The pivot fitting according to Claim 1, characterized in that the control disk (7, 170, 270, 370) is formed as a disk spring or a spring plate (110, 210, 310).
3. The pivot fitting according to Claim 1, characterized in that the clamping mechanism (5, 150, 250, 350) comprises a first spring element (10, 110, 210, 310), using which the control disk (7, 170, 270, 370) can be pressed onto the toothing (4, 140, 240, 340) in a friction-locked manner.
4. The pivot fitting according to Claim 3, characterized in that the first spring element (10) is formed as a disk spring or spring plate (110, 210, 310).
5. The pivot fitting according to any one of the preceding claims, characterized in that the clamping mechanism comprises a second spring element (11, 101, 201, 301), using which the pawl (5, 150, 250, 350) can be pressed against the toothing (4, 140, 240, 340).
6. The pivot fitting according to any one of the preceding claims, characterized in that the toothing (4) is formed as at least one at least partially-circular toothed pulley (4a, 4b) having outer toothing formed on a partially-circular outer edge, which is coupled via a force shaft (6) to the second lever (3), and the pawl (5) comprises a pivot arm (51) having teeth (52) facing toward the rotational axis (D) of the levers (2, 3).
7. The pivot fitting according to Claim 6, characterized in that the toothing (4) is integrally formed with the force shaft (6), in particular as a sintered part, wherein the control disk (7) is arranged laterally on the toothing.
8. The pivot fitting according to Claim 6, characterized in that the toothing (4) is formed in the form of two partially-circular toothed pulleys (4a, 4b), wherein the control disk (7) is arranged between the toothed pulleys (4a, 4b).
9. The pivot fitting according to Claim 8, characterized in that the pawl (5) consists in two parts of two pawl elements (5a, 5b), wherein each one of the pawl elements (5a, 5b) is arranged in a plane with respectively one of the toothed pulleys (4a, 4b).
10. The pivot fitting according to any one of Claims 6 to 9, characterized in that the control disk (7) comprises a switchover contour (74) on an outer circumference, using which the pawl (5) is pivotable out of a catch position with the toothing (4) into a non-catch position.
11. The pivot fitting according to Claim 10, characterized in that the pawl (5), adjacent to the teeth (52) forming the inner toothing, comprises a recess (54), into which the switchover contour (74) is inserted in the catch position of the pawl (5) with the toothing (4).
12. The pivot fitting according to either one of Claims 10 or 11, characterized in that the switchover contour (74) is formed in such a way that the pawl (5), upon adjustment of the levers (2, 3) in relation to one another in the adjustment direction (V) from a predetermined adjustment angle (γ), is held disengaged from the toothing (4) while supported on a first support surface of the switchover contour (74).
13. The pivot fitting according to any one of Claims 5 to 12, characterized in that the first lever (2, 420) comprises a first cover (2a, 420a) and a second cover (2b, 420b), wherein the toothing (4, 440) and the control disk (7, 470) are accommodated between lever heads (23, 423) of the covers (2a, 2b, 420a, 420b), wherein the second spring element (11) is arranged between the lever heads (23, 423), circumferentially enclosing the toothing (4, 440) and the control disk (7, 470).
14. The pivot fitting according to any one of Claims 1 to 5, characterized in that the toothing (140, 240, 340) is formed as a circular inner toothing arranged on the second lever (130, 230, 330), and the at least one pawl (150, 250, 350) comprises a pivot arm (151, 251, 351) having teeth (152, 252, 352) facing away from the rotational axis (D) of the levers (120, 130, 220, 230, 320, 330).
15. The pivot fitting according to either one of Claims 13 to 14, characterized in that the toothing (140, 340) is formed as a circular inner toothing formed on a lever head (132, 332) of the second lever (130, 330).
16. The pivot fitting according to either one of Claims 13 to 14, characterized in that the toothing (240) is formed as a circular toothed pulley having inner toothing formed thereon, which is accommodated between the lever heads (223, 323) of the second lever (230).
17. A piece of furniture (500) having a pivot fitting (1, 100, 200, 300, 400) according to any one of the preceding claims.
18. The piece of furniture according to Claim 17, characterized in that the pivot fitting (1, 100, 200, 300, 400) adjustably fixes an armrest (503) or other adjustable furniture parts on a body (501) of a piece of furniture (500) designed as a piece of seating or reclining furniture.

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