EP3621488B1 - 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 a piece of furniture with such a swivel fitting.

A generic swivel fitting is, for example, from US3779655 A 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 upholstered furniture, while the second lever is used, for example, to fix a pivotably mounted headrest, which is fixed from an initial position in predetermined locking steps with the help of the pivot fitting.

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 locking position that was already passed through in the previous setting process, it is necessary to pivot the locking fitting completely into an end position and from there to pivot the locking fitting back into its basic position in order to then move the locking fitting back into the initial pivoting direction to pivot into the desired locking position.

To switch over the swivel fitting, it must be pivotable in the direction of adjustment by a predetermined adjustment angle of approximately 20 ° beyond the latch.

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 and with which a larger latching area is made possible with the same adjustment path.

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 swivel fitting according to the invention, in particular for movable furniture parts on seating or reclining furniture, has a first lever and a second lever which are pivotably mounted relative to one another about a common axis from a basic position by a predetermined angle.

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

The clamping or locking mechanism has a toothing fixed in a rotationally fixed manner on the second lever, at least one pawl pivotably mounted on the first lever and loaded in the direction of the toothing, which is in engagement with the toothing in a locking position.

The clamping or latching mechanism also has a first 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, so that when disengaged with the pawl brought to the toothing by driving over the predetermined angle in a return direction, the two levers can be pivoted back into the basic position.

The first 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.

A second control disk, which is rotatably mounted about the common axis, can be carried along by the toothing and is mounted rotatably by a switching angle relative to the toothing

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.

In addition, it is possible to use a larger portion of the adjustment path as a detent path, in that the path required for switching is shortened. Advantageous variant embodiments of the invention are the subject of the subclaims.

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

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

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

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

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

A switchover contour is preferably provided at a distance from the recess on an outer circumference of the first 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 is located in one of the teeth 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 enclosing the recess serve as support surfaces for supporting the pawl on the switching contour of the first 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, 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 the pawl to click into place audibly when moving in the direction of adjustment.

In both variants, the desired locking 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 off the switching contour of the control disc and engages in the toothing.

According to a further embodiment variant, the toothing is designed in one piece with the power shaft, in particular as a sintered part, the two control disks being arranged to the side of the toothed disk.

This facilitates the assembly of the swivel fitting.

It is also conceivable to design the toothing and the power shaft as separate components, in which case the toothing is coupled to the power shaft in a rotationally fixed manner.

According to a further preferred embodiment variant, the second control disk is designed as an annular disk with an elongated hole that accommodates the common axis.

The second control disk preferably has a switching arm which extends radially outward in the direction of the longitudinal extent of the elongated hole and which is received in a recess formed on the circumferential edge of the toothed disk, the recess in the adjustment direction through a first stop in the area of the external toothing and in the return direction a second stop is limited in the area of an elevation adjoining the external toothing.

As a result, a limited pivoting movement of the second control disk relative to the toothed disk of the toothing is made possible in a simple manner. The recess and the stops delimiting it can be produced in a simple manner, in particular in the variant of the toothing designed as a sintered component.

A first contact surface of the switching arm facing the first stop and an outer flank of an edge tooth formed on the free end of the pawl are shaped according to a further embodiment variant in such a way that the pawl can be pushed away from the external toothing by the switching arm when the lever moves in the return direction.

This enables the pawl to be disengaged from the toothing with only a very small adjustment angle.

A radially outer end edge of the switching arm protrudes radially outward in a switchover position over the external toothing.

According to a further embodiment variant, on a section of the second control disk remote from the switching arm, a ramp adjoining the radial displacement of the second control disk is formed on a circular section of the annular disk.

This enables the second control disk to be shifted in a simple manner shortly before reaching the switchover position, the control bolt attached to the first lever being guided along this ramp and thereby displacing the second control disk radially so that the one located radially on the outside Front edge of the switching arm is advanced radially outward beyond the external toothing.

In a further embodiment variant, the toothing and the two control disks are accommodated between the lever heads of the cover, the spring element being arranged between the lever heads so as to encompass the toothing and the control disk circumferentially.

In addition to the pressure on the pawl, the spring element also enables the toothing, the control disks and the pawl to be protected from dirt, which further increases the service life of the swivel fitting.

The furniture according to the invention is characterized by a swivel fitting attached to it as described above.

Figur 1

eine Draufsicht einer ersten Ausführungsvariante eines erfindungsgemäßen Schwenkbeschlages,

Figur 2

eine perspektivische Explosionsdarstellung des Schwenkbeschlages ohne Darstellung des zweiten Hebels,

Figuren 3a, b

perspektivische Ansicht einer Ausführungsvariante der Verzahnung,

Figur 4

eine perspektivische Ansicht der Verzahnung gemäß Figuren 3a und 3b mit daran angeordneter erster Steuerscheibe,

Figur 5

eine Seitenansicht des Verzahnung gemäß Figuren 3a und 3b mit daran angeordneter erster Steuerscheibe,

Figur 6

eine perspektivische Ansicht der ersten Steuerscheibe,

Figur 7

eine Draufsicht auf die ersten Steuerscheibe gemäß Figur 6, montiert an der Verzahnung,

Figur 8

eine Draufsicht auf eine alternative Ausführungsvariante der ersten Steuerscheibe, montiert an der Verzahnung,

Figur 9

eine perspektivische Ansicht einer Ausführungsvariante der Klinke,

Figur 10

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

Figur 11

eine der Figur 10 entsprechende Darstellung des Schwenkbeschlages in einer ersten Rastposition,

Figur 12

eine vergrößerte Ansicht eines Ausschnitts des Schwenkbeschlages gemäß Figur 10 bei weiter in Verstellrichtung verschwenkten Hebeln mit aus dem Eingriff mit der Verzahnung gebrachte Klinke,

Figur 13

eine der Figur 12 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 14

eine Draufsicht entsprechend Figur 10 in einer Rastposition,

Figur 15

eine Draufsicht auf den Schwenkbeschlag gemäß Figur 10 in der Umschaltposition, bei der die beiden Hebel um den gesamten möglichen Winkel zueinander aus der Grundstellung heraus verschwenkt sind,

Figur 16

eine der Figur 10 entsprechende Darstellung des Schwenkbeschlages während einer Verschwenkung in Rückstellrichtung,

Figur 17

eine der Figur 10 entsprechende Darstellung des Schwenkbeschlages in einer Position vor Umstellung der Bewegungsrichtung der Hebel zueinander in Verstellrichtung,

Figuren 18, 19 der Figur 10

entsprechende Darstellungen des Schwenkbeschlages während der Bewegung in Verstellrichtung bzw. Belastungsrichtung zur Erreichung der in Figur 19 gezeigten Rastposition,

Figuren 20 bis 23

Draufsichten auf die rückwärtige Seite des Schwenkbeschlags gemäß Figur 10 bei Bewegung in Verstellrichtung vor bzw. bei Erreichen der Umschaltposition,

Figuren 24, 25

Draufsichten auf die rückwärtige Seite des Schwenkbeschlags gemäß Figur 10 bei Bewegung in Rückstellrichtung nach Erreichen der Umschaltposition,

Figuren 26 bis 28

perspektivische Darstellungen eines Möbels mit Armlehne in unterschiedlichen Rastpositionen.

Exemplary embodiments of the invention are explained below with reference to the accompanying drawings. Show it:

Figure 1

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

Figure 2

a perspective exploded view of the swivel fitting without showing the second lever,

Figures 3a, b

perspective view of a variant of the toothing,

Figure 4

a perspective view of the toothing according to Figures 3a and 3b with the first control disk arranged thereon,

Figure 5

a side view of the toothing according to Figures 3a and 3b with the first control disk arranged thereon,

Figure 6

a perspective view of the first control disk,

Figure 7

a plan view of the first control disk according to Figure 6 , mounted on the toothing,

Figure 8

a plan view of an alternative embodiment of the first control disk, mounted on the toothing,

Figure 9

a perspective view of an embodiment of the latch,

Figure 10

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

Figure 11

one of the Figure 10 corresponding representation of the swivel fitting in a first locking position,

Figure 12

an enlarged view of a section of the swivel fitting according to Figure 10 in the case of levers pivoted further in the adjustment direction with the pawl disengaged from the toothing,

Figure 13

one of the Figure 12 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 14

a top view accordingly Figure 10 in a rest position,

Figure 15

a plan view of the swivel fitting according to Figure 10 in the switchover position, in which the two levers are pivoted through the entire possible angle to one another from the basic position

Figure 16

one of the Figure 10 Corresponding representation of the swivel fitting during a swiveling in the return direction,

Figure 17

one of the Figure 10 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 18, 19 of Figure 10

corresponding representations of the swivel fitting during movement in the adjustment direction or load direction to achieve the in Figure 19 shown locking position,

Figures 20 to 23

Top views of the rear side of the swivel fitting according to Figure 10 when moving in the adjustment direction before or when reaching the switchover position,

Figures 24, 25

Top views of the rear side of the swivel fitting according to Figure 10 when moving in the reset direction after reaching the switchover position,

Figures 26 to 28

perspective representations of a piece of 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 disc and the like selected in the respective figures. These terms are not to be understood as restrictive, i.e. these references may change as a result of different working positions or the mirror-symmetrical design or the like.

In the Figures 26 to 28 The reference numeral 100 denotes a piece of furniture designed here as upholstered furniture, which is designed here as seating furniture, in particular as an armchair, with a furniture body 101, a backrest 502 and an armrest or headrest 103. The armrest or headrest 503 is in different positions attached to the furniture body 101 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 103 out of the position shown in FIG Figure 26 basic position shown in Figure 27 angled position shown in Figure 28 to adjust shown upright position and to lock in these respective positions.

With the swivel fitting 1, for which various design variants of swivel fittings are described below, it is also possible to this arm or headrest 103 from the in Figure 28 position shown in Figure 27 to adjust the position shown without the armrest or headrest 103 first in Figure 26 to have to pivot back the basic position shown.

Design variants of a swivel fitting suitable for such an adjustment are shown below with reference to FIG Figures 1 to 26 described.

The swivel fitting 1 has a first lever 2 and a second lever 3, which are mounted pivotably relative to one another about a common axis D from a basic position by a predetermined angle α.

The swivel fitting 1 also has a clamping mechanism with which the two levers 2, 3 can be fixed relative to one another in different angular positions within the predetermined angle α.

The clamping mechanism has a toothing 4 fixed in a rotationally fixed manner on the second lever 3 as well as at least one pawl 5 which is pivotably mounted on the first lever 2 and loaded in the direction of the toothing 4 and which is in engagement with the toothing 4 in a latching position.

The clamping mechanism also has a first control disk 7 rotatably mounted about the common axis D, with which the at least one pawl 5 can be brought out of engagement with the toothing 4 in an adjustment direction V after passing the predetermined angle α, so that at pawl 5 brought out of engagement with the toothing 4 by overriding the predetermined angle α in a return direction R, the two levers 2, 3 can be pivoted back into the basic position.

The first control disk 7 can be carried along in a frictionally engaged manner on the toothing 4 and is rotatably supported by a switching angle β relative to the first lever 2.

The first lever 2 here 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 area 22. In the lever head 23 is a circular Reception 25 is provided, which is used to carry out a power shaft 6 with a polygonal surface.

The toothing 4 as well as the first control disk 7 and a second control disk 9 are accommodated between the lever heads 23 of the first cover 2a and the second cover 2b. In this embodiment variant, the toothing 4 has a toothed disk 41 which is designed in one piece with the power shaft 6, in particular as a sintered part.

The power shaft 6 is designed for a non-rotatable connection to the second lever 3 with, for example, a polygonal outer contour 61.

The power shaft 6 also has a receptacle 62 in which a central bolt 12 is received, with which the two levers 2, 3 are axially fixed to one another.

The toothed disk 41 has, as in Figures 2 to 4 is shown, an integrally formed on a partially circular outer edge external toothing 42.

As can be seen in FIGS. 2 and 9, the pawl 5 used for locking with the toothing 4 is pivotably mounted on the first lever 2 via a pawl bolt 59 formed here on the pawl.

It is also conceivable to design the pawl bolt as a separate component, which would then be received in a bearing bore of the pawl 5. The pawl bolt 59 extends between the two lever heads 23 of the first cover 2a and the second cover 2b.

The first control disk 70 is, as in FIGS Figures 4 to 6 shown, designed as a disc spring or spring plate which is arranged laterally on the toothed disc 41 of the toothing 4.

An annular disk 10 pushed onto a section of the power shaft 6 presses the first control disk 70 under pretension against the toothed disk 41 of the toothing 4. To attach this annular disk 10 to the section of the power shaft 6, the annular disk 10 is, for example, in the manner of a shaft lock with a press fit onto the outer contour 61 of the power shaft 6 pressed on. Other types of fastening of the annular disk 10 to the power shaft 6, such as welding, pressing on or the like, are also conceivable. To prevent rotation with respect to the power shaft 6, the annular disk 10 has tongues extending radially inward from an annular base body, as in FIG Figure 4 is shown.

A plan view of an embodiment variant of the first control disk 7 is shown in FIG Figures 6 and 7th 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 a recess 73 on an outer circumference in which a control pin 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 larger than the diameter of the control pin 8. The width of this recess 73 is dimensioned such that the control disk 7 can be moved by the switching angle β relative to the control pin 8.

In order to always press the pawl 5 in the direction of the external toothing 42 of the toothing 4, a spring element 11 is provided which is arranged between the lever heads 23 of the first cover 2a and the second cover 2b and surrounds the gap circumferentially.

The two lower ends of this second spring element 11, which is designed here as a leaf spring and also serves to cover the space between the lever heads 23 of the first cover 2a and the second cover 2b, are bent in the direction of the pawl 5 and thus press the pawl 5 steadily in the direction of the external toothing 42 of the toothed disk 41.

The second control disk 9 is preferably arranged on the side of the toothed disk 41 opposite the first control disk 7.

As in Figure 2 and the Figures 20 to 25 As shown, the second control disk 9 preferably has an annular disk 91 with a common axis D receiving it Elongated hole 93. The part of the power shaft 6 protruding on this side of the toothed disk 41 is pushed into the elongated hole 93.

The external toothing 42 of the toothed disk 41 projects axially slightly beyond the side surface of the toothed disk 41 on this side of the toothed disk 41. The second control disk 9 lies in the mounted position in this recess.

The width of the ring of the ring disk 91 varies over the circumference, so that when the ring disk rests on the control pin 8 during a pivoting process of the swivel fitting 1, depending on the width of the ring disk, a radial displacement of the second control disk takes place.

At a first end of the external toothing 42, an elevation 43 extending radially beyond the external toothing 42 and having a recess 44 for receiving a switching arm 92 of the second control disk 9 extending radially outward in the direction of the longitudinal extension of the elongated hole 93 is formed.

The recess 44 extends over a partial angular region of the elevation 43 and a portion of the external toothing 42. The recess is limited in the adjustment direction V by a first stop 47 in the region of the external toothing 42. In the return direction R, the recess 44 is limited by a second stop 45 in the area of the elevation 43 adjoining the external toothing 42.

This enables a limited pivoting movement of the second control disk 9 relative to the toothing 4 over a switching angle γ.

The elongated hole 93 of the second control disk 9 makes it possible to move the second control disk 9 radially in relation to the power shaft.

On a section remote from the switching arm 92, a ramp 94 is formed on the outer edge of the annular disk 91, so that when the ramp 94 is driven down by the contact of the control pin 8, a radial displacement of the annular disk 91 takes place, as a result of which a radially outer end edge of the switching arm 92 switching arm 92 of a position radially inside the external toothing 42 is brought into a position radially outside the external toothing 42 above.

The function of the swivel fitting 1 is explained below using the Figures 10 to 25 described.

In Figure 10 a basic position of the swivel fitting 1 is shown with the clamping mechanism exposed.

The one in the Figures 10 to 19 The sequence of movements shown is the second lever 3 stationary, while the first lever 2 for adjustment on its in Figure 10 basic position shown in an adjustment direction V (in Figure 10 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 10 As shown, the control disk 7 is positioned in the basic position in such a way 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 slides down from the second support surface 56 of the pawl 5 and dips into the recess 54 of the pawl 5.

The pawl 5 is pressed into the external toothing 42 of the toothing 4 into a first latching position by means of the spring element 11. Reaching this first locking position can be heard when the pawl 5 hits the toothing 4. This first latching position takes place preferably 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 on the toothed disk 41.

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 12 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 keeps the pawl 5 out of engagement with the toothing 4 by the movement that is now common with the control disk 7. The control disk 7 is moved along with the control pin 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 toothed disk 41. Such an angular position of the swivel fitting 1 is exemplified in Figure 14 shown.

In the case of the Figures 8 and 13th 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 is moved further out of the position shown in FIG Figure 11 position shown is moved in adjustment direction V from one locking position to the next.

This in Figure 8 The variant of the switching contour shown enables an audible latching of the pawl 5 during adjustment in adjustment direction V.

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

In Figure 15 a switchover 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 lifted out of engagement with the toothing 4 with the aid of the second control disk 9. The mode of operation of the second control disk will be explained below with reference to FIG Figures 20 to 25 described.

During a subsequent pivoting of the first lever 2 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, until the control pin 8 reaches the position shown in Figure 16 reached the left edge of the recess 73 of the control disk 7.

During this swivel movement into the in Figure 16 In the position shown, the second support surface 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 held 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 17 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 switching contour 74 of the control disk 7, so that the teeth 52 of the pawl 5 engage with the external toothing 42 of the toothed disk 41. This position is in Figure 19 shown.

The mode of operation of the second control disk 9 is described below with reference to FIG Figures 20 to 25 described.

The functioning of the second control disk 9 is now based on the Figures 20 to 25 described.

At the in Figure 20 The illustration shown is the swivel fitting from an in Figure 10 The starting position shown has already been pivoted into a position in the adjustment direction in which the pawl 5 engages with an outer tooth in a tooth of the external toothing 42 at the transition area to the recess 44.

In this position, the second control disk 9 reaches a position in which the ramp 94 comes into engagement with the control bolt 8.

When the swivel fitting, here the toothing 4 or the second lever 3 (not shown here), is pivoted further, the control pin 8 pushes the second control disk into the position shown in FIG Figure 21 The position shown, in which the radially outer end edge of the switching arm 92 protrudes radially outward over the external toothing 42 and thereby pushes the spring element 11 away radially outward and thus reduces the pressing force of the spring element 11 on the pawl 5.

The radially outer end edge of the switching arm 92 is extended to the same height as the elevation 43, as a result of which the action diameter of the second control disk 9 increases.

When the toothing 4 continues to rotate in the adjustment direction V, the external toothing 42 of the pawl 5 initially continues to engage with an area of the external toothing 42 of the toothed disk 41, which is in the area of the recess 44, until a first side edge 96 of the switching arm 92 of the second control disk 9 an outer flank 57 of the outermost tooth of the pawl 5, which serves as a starting bevel, rests.

This first contact surface 96 of the switching arm 92 and the outer flank 57 of the edge tooth formed on the free end of the pawl 5 are shaped here in such a way that when the levers 2, 3 move relative to the return direction R, the pawl can be pushed away from the external toothing 42 by the switching arm 92.

In the embodiment variant shown here, the setting angle of the outer flank 57 and the first contact surface 96 of the switching arm 92 is preferably between 8 ° and 12 °, in particular approximately 10 ° relative to a radial line of the axis of rotation D.

By turning this slightly further in Figure 22 position shown in Figure 23 position shown, which is preferably about 7 °, the switchover point is reached.

As in Figure 23 is shown, the front edge of the switching arm 92 is pushed under the edge tooth at the free end of the pawl 5 at the switching point, so that the toothing 52 of the pawl 5 is out of engagement with the external toothing 42 of the toothed disk 41 and now enables a movement in reset R.

In this position, the second control disk 9 is tensioned between the pawl 5 and the control pin 8 via the force of the spring element 11.

When the swivel fitting is pivoted in the return direction R, for example by about 10 °, the in Figure 24 Pivot position shown reached.

As in Figure 24 As shown, the second control disk 9 remains clamped between the pawl 5 and the control pin 8, which is made possible by the angular width of the recess 44.

The fact that the second control disk 9 remains stationary in this position enables the first control disk 7 with its second support surface to be pushed onto the second support surface 56 of the pawl 5 during the pivoting in the return direction R, and thus the pawl 5 continues through the first control disk 7 Engagement with the external toothing 42 of the toothed disk 41 is held.

When the swivel fitting 1 continues to move in the direction of the basic position, the second control disk 9 is pushed down by the teeth of the pawl 5 with the aid of the first stop 47.

At the same time, when the second control disk 9 is rotated, as in FIG Figure 25 shown, a region of the annular disk 91 of the second control disk 9 with a smaller ring width in front of the control pin 8, so that the radially outer end edge of the switching arm 92 by the pressure force of the second spring element 11 is shifted back into a position radially inside the toothing 42 of the toothing 4.

List of reference symbols

1

Swivel fitting

2

first lever

2a

first lid

2 B

second lid

21

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

41

Tooth lock washer

42

External gearing

43

Elevation

44

Recess

47

first stop

5

pawl

51

Latch arm

52

teeth

53

Bearing bore

54

Recess

55

first support surface

56

second support surface

57

Outer flank

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

Fixing bolt / latch bolt

91

Washer

92

Shift arm

93

Long hole

94

ramp

96

Side edge / contact surface

10

first spring element

11

second spring element

12th

Central bolt

13th

Bearing ring

14th

disc

100

Furniture

101

Furniture body

102

backrest

103

armrest

D.

axis

V

Adjustment direction

R.

Return direction

α

maximum adjustment angle

β

Switching angle

γ

Switching angle

Claims (18)

1. A pivot fitting (1), in particular for movable furniture parts on pieces of seating or reclining furniture, comprising

   - a first lever (2) and a second lever (3), 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, 3) 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) secured in a rotationally-fixed manner on the second lever (3),

   b. at least one pawl (5), which is mounted so it is pivotable on the first lever (2) and is loaded in the direction of the toothing (4), and which is engaged with the toothing (4) in a catch position,

   c. a first control disk (7) mounted so it is rotatable around the common axis (D), using which the at least one pawl (5) can be disengaged from the toothing (4) after running over the predetermined angle (α) from the base position in an adjustment direction (V), so that if the pawl (5) is disengaged from the toothing (4) by running over the predetermined angle (α) in a reset direction (R), the two levers (2, 3) are pivotable back into the base position,

   characterized in that

   - a second control disk (9), which is mounted so it is rotatable around the common axis (D), can be carried along by the toothing (4) and is mounted so it is rotatable by a switching angle (γ) in relation to the toothing (4).
2. The pivot fitting according to Claim 1, characterized in that the toothing (4) is formed as an at least partially-circular toothed pulley (41) having an outer toothing (42) formed on a partially-circular outer border, which is coupled via a force shaft (6), which forms the common axis (D), to the second lever (3) and the pawl (5) comprises a pivot arm (51) having teeth (52) facing toward the axis (D).
3. The pivot fitting according to either one of the preceding claims, characterized in that the first control disk (7) comprises an opening (73), in which a control bolt (8) fastened on the first lever (2) is accommodated, wherein the opening (73) is dimensioned in such a way that the control bolt (8) is displaceable by the switching angle (β) in relation to the first control disk (7).
4. The pivot fitting according to any one of the preceding claims, characterized in that the first control disk (7) is formed as a disk spring or spring plate.
5. The pivot fitting according to any one of the preceding claims, characterized in that the first control disk (7) can be carried along by bearing in a friction-locked manner on the toothing (4) and is mounted so it is rotatable by a switching angle (β) in relation to the first lever (2).
6. The pivot fitting according to any one of the preceding claims, characterized in that the first 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.
7. The pivot fitting according to Claim 6, 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).
8. The pivot fitting according to Claim 7, characterized in that the edges of the pawl (5) framing the recess (54) are formed as support surfaces (55, 56) for supporting the pawl (5) on the switchover contour (74) of the control disk (7).
9. The pivot fitting according to any one of the preceding claims, characterized in that the second control disk (9) is formed as a ring disk having an oblong hole (93) accommodating the common axis (D).
10. The pivot fitting according to Claim 9, characterized in that the second control disk (9) comprises a switching arm (92) extending radially outward in the direction of the longitudinal extension of the oblong hole (93), which switching arm is accommodated in a recess (44) formed on the circumferential border of the toothed pulley (41), wherein the recess (44) is delimited in the adjustment direction (V) by a first stop (47) in the region of the outer toothing (42) and in the reset direction (R) by a second stop (45) in the region of a protrusion (43) adjoining the outer toothing (42).
11. The pivot fitting according to Claim 10, characterized in that a first contact surface (96) of the switching arm (92) facing toward the first stop (47) and an outer flank (57) of a border tooth formed on the free end of the pawl (5) are formed in such a way that upon relative movement of the levers (2, 3) in the reset direction (R), the pawl can be pressed away from the outer toothing (42) by the switching arm (92).
12. The pivot fitting according to Claim 11, characterized in that an angle of attack of the first contact surface (96) of the switching arm (92) and the outer flank (57) of the border tooth formed at the free end of the pawl (5) in relation to the radial of the rotational axis (D) is between 8° and 12°, in particular 10°.
13. The pivot fitting according to any one of Claims 10 to 12, characterized in that a front edge of the switching arm (92) located on the radial outside protrudes radially outward beyond the outer toothing (42) in a switchover position.
14. The pivot fitting according to any one of Claims 10 to 13, characterized in that a ramp (94) interacting with the control bolt (8) is formed on a portion of the second control disk (9) remote from the switching arm (92).
15. The pivot fitting according to any one of the preceding claims, characterized in that the clamping mechanism comprises a spring element (11), using which the pawl (5) can be pressed against the toothing (4).
16. The pivot fitting according to Claim 15, characterized in that the first lever (2) comprises a first cover (2a) and a second cover (2b), wherein the toothing (4) and the control disk (7) are accommodated between lever heads (23) of the covers (2a, 2b), wherein the spring element (11) is arranged between the lever heads (23), circumferentially enclosing the toothing (4) and the control disk (7).
17. A piece of furniture (100) having a pivot fitting (1) according to any one of the preceding claims.
18. The piece of furniture (100) according to Claim 17, characterized in that the pivot fitting (1) adjustably fixes an armrest (103) or other adjustable furniture parts on a furniture body (101) of a piece of furniture (100) designed as a piece of seating or reclining furniture.

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