Swivel fittings and furniture

Abstract

Swivel fitting (1), comprising - a first lever (2) and a second lever (3) which are pivotally mounted relative to one another about a common axis (D) from a basic position by a predetermined angle (α), - a clamping mechanism with which the two levers (2, 3) can be fixed in different angular positions within the predetermined angle (α) relative to each other, - wherein the clamping mechanism comprises: a toothing (4) fixed to the second lever (3) in a rotationally fixed manner, b. at least one pawl (5) pivotally mounted on the first lever (2) and loaded in the direction of the toothing (4), which in a locking position is in engagement with the toothing (4), c. a first control disc (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) after passing the predetermined angle (α) from the basic position in an adjustment direction (V), so that when the pawl (5) is brought out of engagement with the toothing (4) by passing the predetermined angle (α) in a return direction (R), the two levers (2, 3) can be pivoted back into the basic position, characterized in that - a second control disc (9) which is mounted so as to be rotatable about the common axis (D) is carried along by the toothing (4) and is mounted so as to be rotatable about a switching angle (γ) relative to the toothing (4).

Description

[0001] The present invention relates to a pivot fitting according to the preamble of claim 1 and a piece of furniture with such a pivot fitting.

[0002] A pivoting fitting of this type is known, for example, from EP 2 544 567 B1. In the pivoting fitting disclosed therein, two levers can be fixed relative to each other via a locking mechanism. One of these levers can be attached to a base or seat part of an upholstered piece of furniture, while the second lever serves, for example, to fix a pivotably mounted headrest, which can be fixed from an initial position to predetermined locking positions using the pivoting fitting.

[0003] To change this locking position further in the adjustment direction, the locking fitting can be easily pivoted further. However, to reach a new locking position that has already been reached during the previous adjustment process, the locking fitting must be pivoted completely to an end position and from there back to its home position. The locking fitting can then be pivoted back in the initial pivoting direction to the desired locking position.

[0004] To switch the swivel fitting, it must be able to swivel in the adjustment direction by a predetermined adjustment angle of approximately 20° beyond the locking mechanism.

[0005] Further pivot fittings are known, for example, from the documents DE 10 2013 104 692 A1, DE 20 2010 000 368 U1, DE 20 2006 019 497 U1, DE 20 2008 012 303 U1, DE 20 2007 016 435 U1 and US 3 779 653 A.

[0006] The object of the present invention is to provide a pivot fitting in which the adjustment process from a first to a second locking position can be carried out even more easily and with which a larger locking range is possible with the same adjustment path.

[0007] This object is achieved with a pivoting fitting having the features of claim 1.

[0008] The object is further achieved by a piece of furniture with such a pivoting fitting according to claim 18.

[0009] The pivot fitting according to the invention has a first lever and a second lever which are mounted pivotably relative to one another about a common axis from a basic position by a predetermined angle.

[0010] With a clamping or locking mechanism of the pivot fitting, the two levers can be fixed in different angular positions within the predetermined angle relative to each other.

[0011] The clamping or locking mechanism has a toothing fixed to the second lever in a rotationally fixed manner, at least one pawl pivotally mounted on the first lever and loaded in the direction of the toothing, which is in engagement with the toothing in a locking position.

[0012] The clamping or locking mechanism further comprises a first control disc which is mounted so as to be rotatable about the common axis and with which the at least one pawl can be brought out of engagement with the toothing after passing the predetermined angle from the basic position in an adjustment direction, so that when the pawl is brought out of engagement with the toothing by passing the predetermined angle in a return direction, the two levers can be pivoted back into the basic position.

[0013] The first control disc is frictionally engaged with the toothing and is mounted so as to be rotatable relative to the first lever by a switching angle.

[0014] A second control disc, which is mounted so as to be rotatable about the common axis, is carried along by the toothing and is mounted so as to be rotatable about a switching angle relative to the toothing.

[0015] With such a pivot fitting, it is now possible to stop this pivoting process in an intermediate position even when the levers are pivoted towards each other in the return direction and to lock the levers in a desired position without the two levers first having to be pivoted back to the basic position.

[0016] In addition, it is possible to use a larger portion of the adjustment travel as a stop travel by shortening the travel required for switching.

[0017] Advantageous embodiments of the invention are the subject of the subclaims.

[0018] According to a first advantageous embodiment, the toothing is designed as at least one at least partially circular toothed disk with external teeth formed on a partially circular outer edge, which are coupled to the second lever via a power shaft. The pawl has a pivot arm with teeth facing the rotational axis of the lever.

[0019] According to one design variant, the first control disc is designed as a disc spring or spring plate. This makes it possible to eliminate the first spring element.

[0020] A control disc designed in this way can be manufactured cost-effectively and easily mounted in the clamping mechanism and ensures sufficient frictional engagement of the first control disc with the toothing.

[0021] In order to permanently apply force to the pawl, the clamping mechanism has a spring element with which at least one pawl can be pressed against the toothing.

[0022] To move the first control disc relative to the toothed disc, it preferably has a recess in which a control pin attached to the first lever is accommodated. The recess is dimensioned such that the control pin can be displaced relative to the first control disc by the switching angle.

[0023] Preferably, a switching contour is provided at a distance from the recess on an outer circumference of the first control disc, with which the pawl can be pivoted from a locking position with the toothing into a non-locking position. In a locking position of the pawl, the switching contour is located in a recess of the pawl adjacent to the teeth forming an internal toothing.

[0024] According to a further preferred embodiment, the edges of the pawl enclosing the recess serve as support surfaces for supporting the pawl on the switching contour of the first control disc.

[0025] This makes it possible to keep the pawl out of engagement with the teeth when the levers are pivoted towards each other in the adjustment direction as well as in the return direction.

[0026] According to a preferred embodiment, the switching contour is shaped such that when the levers are adjusted relative to one another in the adjustment direction, the pawl is supported on a first support surface of the switching contour and is held out of engagement with the toothing from a predetermined adjustment angle.

[0027] This enables silent adjustment when adjusting the levers relative to each other in the adjustment direction, since the pawl does not engage with the toothing due to the support on the switching contour and thus ensures silent adjustment.

[0028] According to an alternative design variant, the switching contour is shaped in such a way that the pawl is guided in contact with the toothing when the levers are adjusted relative to each other in the direction of adjustment.

[0029] This variant of the switching contour enables an audible click of the latch when adjusting in the direction of adjustment.

[0030] In both variants, the desired locking position is slightly overrun so that when the pivot fitting is loaded and the lever is pivoted relative to the return direction, the pawl slides off the switching contour of the control disc and engages in the toothing.

[0031] According to a further embodiment, the toothing is formed integrally with the power shaft, in particular as a sintered part, wherein the two control discs are arranged laterally of the toothed disc.

[0032] This makes the installation of the swivel fitting easier.

[0033] It is also conceivable to design the gearing and the power shaft as separate components, in which case the gearing is non-rotatably coupled to the power shaft.

[0034] According to a further preferred embodiment, the second control disc is designed as an annular disc with an elongated hole receiving the common axis.

[0035] Preferably, the second control disc has a switching arm extending radially outwards in the direction of the longitudinal extent of the elongated hole, which switching arm is received in a recess formed on the circumferential edge of the toothed disc, wherein the recess is limited in the adjustment direction by a first stop in the region of the external toothing and in the return direction by a second stop in the region of a projection adjoining the external toothing.

[0036] This allows for a limited pivoting movement of the second control disc relative to the toothed disk of the gearing in a simple manner. The recess and the stops that define it can be easily manufactured, particularly in the sintered version of the gearing.

[0037] According to a further embodiment, 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 in such a way that upon relative movement of the levers in the return direction, the pawl can be pushed away from the outer toothing by the switching arm.

[0038] This makes it possible to disengage the pawl from the toothing with only a very small adjustment angle.

[0039] In a switching position, a radially outer front edge of the switching arm protrudes radially outwards over the external toothing.

[0040] According to a further embodiment, a ramp is formed on a section of the second control disc remote from the switching arm, which ramp adjoins a circular section of the annular disc and allows the radial displacement of the second control disc.

[0041] This allows a simple displacement of the second control disc shortly before reaching the switching position, whereby the control bolt attached to the first lever is guided along this ramp and thereby displaces the second control disc radially in such a way that the radially outer end edge of the switching arm is pushed radially outwards beyond the external toothing.

[0042] In a further design variant, the toothing and the two control discs are accommodated between the lever heads of the cover, whereby the spring element is arranged between the lever heads so as to encompass the toothing and the control disc.

[0043] In addition to applying pressure to the latch, the spring element also protects the teeth, control discs and latch from dirt, which further increases the service life of the pivot fitting.

[0044] The piece of furniture according to the invention is characterized by a pivoting fitting attached to it as described above.

[0045] Exemplary embodiments of the invention are explained below with reference to the accompanying drawings. They show: Fig. 1 a plan view of a first embodiment of a pivot fitting according to the invention, Fig. 2 a perspective exploded view of the pivot fitting without showing the second lever, Fig. 3a, b perspective view of a variant of the gearing, Fig. 4 a perspective view of the gearing according to Fig. 3a and Fig. 3b with the first control disc arranged thereon, Fig. 5 a side view of the gearing according to Fig. 3a and Fig. 3b with the first control disc arranged thereon, Fig. 6 a perspective view of the first control disc, Fig. 7 a plan view of the first control disc according to Fig. 6, mounted on the gearing, Fig. 8 a plan view of an alternative embodiment of the first control disc, mounted on the toothing, Fig. 9 a perspective view of a variant of the handle, Fig. 10 a schematic plan view of the swivel fitting according to Fig. 1 with the first cover removed in a basic position, Fig. 11 one of the Fig. 10 corresponding representation of the swivel fitting in a first locking position, Fig. 12 an enlarged view of a section of the swivel fitting according to Fig. 10 with the levers pivoted further in the direction of adjustment with the pawl disengaged from the toothing, Fig. 13 one of the Fig. 12 corresponding illustration with alternative design variant of the control disc, in which the pawl slides from one locking position to the next locking position when the levers are adjusted relative to each other in the direction of adjustment, Fig. 14 a plan view corresponding Fig. 10 in a locking position, Fig. 15 a plan view of the swivel fitting according to Fig. 10 in the switching position, in which the two levers are pivoted to each other by the entire possible angle from the basic position, Fig. 16 one of the Fig. 10 corresponding representation of the swivel fitting during a swivel movement in the return direction, Fig. 17 one of the Fig. 10 corresponding representation of the swivel fitting in a position before changing the direction of movement of the levers to each other in the adjustment direction, Fig. 18, Fig. 19 of the Fig. 10 corresponding representations of the swivel fitting during movement in the adjustment direction or load direction to achieve the Fig. 19 shown locking position, Fig. 20 to 23 Top views of the rear side of the swivel fitting according to Fig. 10 when moving in the direction of adjustment before or when reaching the switching position, Fig. 24, Fig. 25 Top views of the rear side of the swivel fitting according to Fig. 10 when moving in the return direction after reaching the switching position, Fig. 26 to 28 perspective views of a piece of furniture with armrests in different locking positions.

[0046] In the following description of the figures, terms such as top, bottom, left, right, front, back, etc., refer exclusively to the exemplary representation and position of the pivot fitting, lever, gearing, latch, control disc, and the like chosen in the respective figures. These terms are not to be understood as limiting; i.e., these references may change due to different operating positions or the mirror-symmetrical design, etc.

[0047] In the Fig. In Figures 26 to 28, reference numeral 100 designates a piece of furniture, exemplified here as upholstered furniture, which is designed here as seating furniture, in particular as an armchair, with a furniture body 101, a backrest 102, and an armrest 103 or headrest. The armrest 103 or headrest is attached to the furniture body 101 in a manner that can be locked in different positions.

[0048] For adjustment, a swivel fitting, designated here with the reference number 1, is used, with which it is possible to move the armrest 103 or headrest from the position shown in Fig. 26 shown basic position over the Fig. 27 shown angled position into the Fig. 28 shown upright position and lock it in these respective positions.

[0049] With the swivel fitting 1, for which various design variants of swivel fittings are described below, it is also possible to remove the armrest 103 or headrest from the Fig. 28 shown position back to the position shown in Fig. 27 without first moving the armrest 103 or headrest into Fig. 26 shown basic position.

[0050] Design variants of a swivel fitting suitable for such an adjustment are described below using the Fig. 1 to 26 described.

[0051] The pivot fitting 1 has a first lever 2 and a second lever 3, which are pivotally mounted relative to each other about a common axis D from a basic position by a predetermined angle α.

[0052] The pivot fitting 1 further comprises a clamping mechanism with which the two levers 2, 3 can be fixed in different angular positions within the predetermined angle α relative to each other.

[0053] The clamping mechanism has a toothing 4 which is fixed in a rotationally fixed manner to the second lever 3 and at least one pawl 5 which is pivotally mounted on the first lever 2 and is loaded in the direction of the toothing 4 and which is in engagement with the toothing 4 in a detent position.

[0054] The clamping mechanism further comprises a first control disc 7 which is mounted so as to be rotatable about the common axis D and by means of which the at least one pawl 5 can be brought out of engagement with the toothing 4 after passing the predetermined angle α from the basic position in an adjustment direction V, so that when the pawl 5 is brought out of engagement with the toothing 4 by passing the predetermined angle α in a return direction R, the two levers 2, 3 can be pivoted back into the basic position.

[0055] The first control disc 7 is frictionally engaged with the toothing 4 and is mounted so as to be rotatable about a switching angle β relative to the first lever 2.

[0056] The first lever 2 consists of two essentially identical covers, namely a first cover 2a and a second cover 2b.

[0057] Each of these covers 2a, 2b has a lever arm 21, which transitions into a lever head 23 via a bending area 22. A circular receptacle 25 is provided in the lever head 23, which serves to pass through a power shaft 6 with a polygonal surface.

[0058] The gearing 4, the first control disc 7, and a second control disc 9 are accommodated between the lever heads 23 of the first cover 2a and the second cover 2b. In this embodiment, the gearing 4 comprises a toothed disc 41, which is formed integrally with the power shaft 6, in particular as a sintered part.

[0059] The power shaft 6 is designed for rotationally fixed connection with the second lever 3 with, for example, a polygonal outer contour 61.

[0060] The power shaft 6 further comprises a receptacle 62 in which a central bolt 12 is received, with which the two levers 2, 3 are axially fixed to one another.

[0061] The toothed disc 41 has, as shown in the Fig. 2 to 4, has an external toothing 42 formed on a part-circular outer edge.

[0062] The pawl 5 used for locking with the toothing 4 is, as shown in the Fig. 2 and Fig. 9, pivotally mounted on the first lever 2 via a latch bolt 59 formed here on the latch.

[0063] It is also conceivable to design the latch bolt as a separate component, which would then be accommodated in a bearing bore of the latch 5. The latch bolt 59 extends between the two lever heads 23 of the first cover 2a and the second cover 2b.

[0064] The first control disc 70 is, as shown in the Fig. 4 to 6, designed as a disc spring or spring plate, which is arranged laterally on the toothed disk 41 of the toothing 4.

[0065] An annular disc 10 pushed onto a section of the power shaft 6 presses the first control disc 70 under prestress against the toothed disc 41 of the toothing 4. In order to fasten this annular disc 10 on the section of the power shaft 6, the annular disc 10 is pressed onto the outer contour 61 of the power shaft 6, for example in the manner of a shaft lock, with a press fit.

[0066] Other ways of fastening the ring disc 10 to the power shaft 6 are also conceivable, such as welding, pressing or the like.

[0067] The annular disc 10 has tongues extending radially inwards from an annular base body to prevent rotation relative to the power shaft 6, as shown in Fig. 4 is shown.

[0068] A plan view of a variant of the first control disc 7 is shown in the Fig. 6 and Fig. 7. The control disc 7 essentially consists of a ring 71 with a central recess 72 through which the power shaft 6 extends in the assembled state, but is not rotationally coupled to it.

[0069] The control disc 7 has a recess 73 on an outer circumference, in which a control pin 8 is received, extending on the first lever 2, here between the lever heads 23 of the first cover 2a and the second cover 2b. The recess 73 is dimensioned such that the control pin 8 can be displaced by the switching angle β relative to the control disc 7.

[0070] In the embodiment 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 disc 7 can be displaced by the switching angle β relative to the control pin 8.

[0071] 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 circumferentially encloses the intermediate space.

[0072] 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 continuously in the direction of the external toothing 42 of the toothed disc 41.

[0073] The second control disc 9 is preferably arranged on the side of the toothed disc 41 opposite the first control disc 7.

[0074] As in Fig. 2 and the Fig. As shown in Figures 20 to 25, the second control disc 9 preferably has an annular disc 91 with an elongated hole 93 receiving the common axis D. The part of the power shaft 6 projecting on this side of the toothed disc 41 is pushed into the elongated hole 93.

[0075] The external toothing 42 of the toothed disk 41 protrudes slightly axially beyond the side surface of the toothed disk 41 on this side of the toothed disk 41. The second control disk 9 is located in this recess in the mounted position.

[0076] The width of the ring of the ring disc 91 varies over the circumference, so that when the ring disc rests on the control pin 8 during a pivoting process of the pivot fitting 1, a radial displacement of the second control disc occurs depending on the width of the ring disc.

[0077] At a first end of the external toothing 42, a projection 43 extending radially beyond the external toothing 42 is formed with a recess 44 for receiving a switching arm 92 of the second control disk 9 extending radially outward in the direction of the longitudinal extent of the elongated hole 93.

[0078] The recess 44 extends over a partial angular area of ​​the elevation 43 and a portion of the external toothing 42. The recess is delimited in the adjustment direction V by a first stop 47 in the area of ​​the external toothing 42. In the return direction R, the recess 44 is delimited by a second stop 45 in the area of ​​the elevation 43 adjoining the external toothing 42.

[0079] This allows a limited pivoting movement of the second control disc 9 relative to the toothing 4 over a switching angle γ.

[0080] The elongated hole 93 of the second control disc 9 makes it possible to move the second control disc 9 radially to the power shaft.

[0081] At a section remote from the switching arm 92, a ramp 94 is formed on the outer edge of the annular disc 91, so that when the ramp 94 is traveled down, the contact of the control pin 8 causes a radial displacement of the annular disc 91, whereby a radially outer end edge of the switching arm 92 is brought from a position radially inside the external toothing 42 to a position radially outside the external toothing 42.

[0082] The function of the swivel fitting 1 is explained below using the Fig. 10 to 25 described.

[0083] In Fig. 10 shows a basic position of the swivel fitting 1 with the clamping mechanism exposed.

[0084] In the Fig. 10 to 19, the second lever 3 is stationary, while the first lever 2 is movable on its Fig. 10 shown basic position in an adjustment direction V (in Fig. 10 counterclockwise) relative to the second lever 3.

[0085] The return direction R is a movement of the first lever 2 relative to the second lever 3 opposite to the adjustment direction V.

[0086] As in Fig. 10, in the basic position the control disc 7 is positioned such that a second support surface 76 of a switching contour 74 of the control disc 7 rests on a second support surface 56 of the pawl 5, whereby the teeth 52 of the pawl 5 are disengaged from the toothing 4.

[0087] In this position, the control pin 8 rests on a right side edge of the recess 73 of the control disc 7.

[0088] 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 disc 7 is moved away from the right side edge in the direction of the left side edge.

[0089] 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 enters the recess 54 of the pawl 5.

[0090] The latch 5 is pressed into a first locking position by means of the spring element 11 into the external toothing 42 of the toothing 4. Reaching this first locking position is audible by the latch 5 striking the toothing 4. This first locking position preferably occurs when the first lever 2 is pivoted by 5° relative to the second lever 3.

[0091] During this first pivoting movement, the control disc 7 is held frictionally on the toothed disc 41.

[0092] 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 disc 7.

[0093] From a predetermined adjustment angle γ, after a Fig. 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 with the external toothing 42 of the toothing 4, so that upon 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 now joint movement with the control disk 7. The control disk 7 is thereby moved along with the control bolt 8 which is fixedly fixed to the first lever 2.

[0094] In order to assume a locking position, the second lever 2 is moved slightly, preferably by an angle of approximately 2 degrees, 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.

[0095] The switching contour 74 of the control disc 7 slides back into the recess 54 of the pawl 5, so that the teeth 52 of the pawl 5 engage with the external toothing 42 of the toothed disc 41. Such an angular position of the pivot fitting 1 is shown by way of example in Fig. 14 shown.

[0096] In the Fig. 8 and Fig. 13, the geometry of the switching contour 74' of the control disc 7 is different from the switching contour 74 (shown in Fig. 7), in that the switching contour 74' has a smaller angular width, so that the pawl 5, when the first lever 2 is moved further, from the Fig. 11 shown position in adjustment direction V from one locking position to the next.

[0097] These in Fig. The variant of the switching contour shown in Figure 8 enables an audible click of the pawl 5 when adjusted in the adjustment direction V.

[0098] The geometry of the teeth 52 of the pawl 5 and the external toothing 42 of the toothing 4 is selected such that a displacement in the adjustment direction is enabled and a displacement in the return direction is hindered.

[0099] In Fig. 15 shows a switching position in which the first lever 2 is pivoted by the maximum adjustment angle α relative to the second lever 3. In this position, the teeth 52 of the pawl 5 are lifted out of engagement with the toothing 4 by means of the second control disc 9. The functioning of the second control disc is explained below with reference to the Fig. 20 to 25 described.

[0100] When the first lever 2 is subsequently pivoted relative to the second lever 3 in the return direction R, the control disc 7 remains stationary in its position, again due to the frictional mounting, until the control bolt 8 reaches the Fig. 16 left edge of the recess 73 of the control disc 7 is reached.

[0101] During this pivoting movement up to the Fig. In the position shown in Fig. 16, the second support surface of the control disc 7 is again 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.

[0102] If, during the pivoting of the first lever 2 in the return direction R, the pivot fitting 1 is to be locked again in such an intermediate position before reaching the basic position, for example in the Fig. 17, it is only necessary to move the first lever 2 slightly in the adjustment direction V.

[0103] 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.

[0104] The pawl 5 itself is pushed down by the pivoting movement from the second support surface of the switching contour 74 of the control disc 7, so that the teeth 52 of the pawl 5 engage with the external toothing 42 of the toothed disc 41. This position is in Fig. 19 shown.

[0105] The function of the second control disc 9 is explained below using the Fig. 20 to 25 described.

[0106] The functioning of the second control disc 9 is now explained using the Fig. 20 to 25 described.

[0107] At the Fig. 20 the swivel fitting is made of a Fig. 10 shown initial position into a position in the adjustment direction in which the pawl 5 engages with an outer tooth into a tooth of the external toothing 42 in the transition area to the recess 44.

[0108] In this position, the second control disc 9 comes into a position in which the ramp 94 engages with the control pin 8.

[0109] When the swivel fitting, here the toothing 4 or the second lever 3 (not shown here), is pivoted further, the control bolt 8 presses the second control disc into the Fig. 21, in which the radially outer end edge of the switching arm 92 projects radially outwards over the external toothing 42 and thereby pushes the spring element 11 radially outwards and thus reduces the pressing force of the spring element 11 on the pawl 5.

[0110] The radially outer end edge of the switching arm 92 is extended to the same height as the elevation 43, whereby the action diameter of the second control disc 9 is increased.

[0111] Upon further rotation of the toothing 4 in the adjustment direction V, the external toothing 42 of the pawl 5 initially engages further with an area of ​​the external toothing 42 of the toothed disk 41 which lies in the area of ​​the recess 44, until a first side edge 96 of the switching arm 92 of the second control disk 9 rests against an outer flank 57 of the outermost tooth of the pawl 5, which serves as a starting bevel.

[0112] This first contact surface 96 of the switching arm 92 as well as the outer flank 57 of the edge tooth formed on the free end of the pawl 5 are shaped in such a way that upon relative movement of the levers 2, 3 in the return direction R, the pawl can be pushed away from the external toothing 42 by the switching arm 92.

[0113] In the embodiment shown here, the angle of attack 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 of the rotational axis D.

[0114] By slightly turning further from this position Fig. 22 shown position into the Fig. The switching point is reached at the position shown in Figure 23, which is preferably at about 7°.

[0115] As in Fig. 23, at the switching point the front edge of the switching arm 92 is pushed under the edge tooth at the free end of the pawl 5, so that the toothing 52 of the pawl 5 is disengaged from the external toothing 42 of the toothed disk 41 and now enables a movement into the return position R.

[0116] In this position, the second control disc 9 is tensioned between the pawl 5 and the control bolt 8 via the force of the spring element 11.

[0117] When the swivel fitting is pivoted in the return direction R, for example by about 10°, the Fig. 24 shown swivel position is reached.

[0118] As in Fig. 24, the second control disc 9 remains clamped between the pawl 5 and the control bolt 8, which is made possible by the angular width of the recess 44.

[0119] The fact that the second control disc 9 remains in this position makes it possible, during pivoting in the return direction R, for the first control disc 7 to be pushed with its second support surface onto the second support surface 56 of the pawl 5 and thus the pawl 5 is now held out of engagement with the external toothing 42 of the toothed disc 41 by the first control disc 7.

[0120] As the pivot fitting 1 continues to move towards the home position, the second control disc 9 is pushed down by the teeth of the pawl 5 with the aid of the first stop 47.

[0121] At the same time, when the second control disc 9 rotates, as shown in Fig. 25, a region of the annular disc 91 of the second control disc 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 is displaced by the pressing force of the second spring element 11 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 2b second lid 21 lever arm 22 Bending area 23 Lever head 24 holes 25 recording 26 Hole 27 Recess 28 Stiffening 3 second lever 31 lever arm 32 lever head 33 recording 4 Gearing 41 Toothed washer 42 external gearing 43 Survey 44 recess 47 first attack 5 jack 51 Jack arm 52 teeth 53 bearing bore 54 recess 55 first support surface 56 second support surface 57 outer flank 6 Power Wave 7 Control disc 71 rings 72 recess 73 recess 74 Switching contour 74' switching contour 75 first support surface 76 second support surface 8 control bolts 9 Fixing bolts / latch bolts 91 Ring disc 92 shift arm 93 slot 94 Ramp 96 Side edge / contact surface 10 first spring element 11 second spring element 12 central bolts 13 Bearing ring 14 slices 100 pieces of furniture 101 Furniture body 102 Backrest 103 Armrest D axis V Adjustment direction R Reset direction α maximum adjustment angle β switching angle γ switching angle

Claims

[1] Swivel fitting (1), comprising - a first lever (2) and a second lever (3) which are pivotally mounted relative to one another about a common axis (D) from a basic position by a predetermined angle (α), - a clamping mechanism with which the two levers (2, 3) can be fixed in different angular positions within the predetermined angle (α) relative to each other, - wherein the clamping mechanism comprises: a toothing (4) fixed to the second lever (3) in a rotationally fixed manner, b. at least one pawl (5) pivotally mounted on the first lever (2) and loaded in the direction of the toothing (4), which in a locking position is in engagement with the toothing (4), c. a first control disc (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) after passing the predetermined angle (α) from the basic position in an adjustment direction (V), so that when the pawl (5) is brought out of engagement with the toothing (4) by passing the predetermined angle (α) in a return direction (R), the two levers (2, 3) can be pivoted back into the basic position, characterized by , that - a second control disc (9) which is mounted so as to be rotatable about the common axis (D) is carried along by the toothing (4) and is mounted so as to be rotatable about a switching angle (γ) relative to the toothing (4). [2] Swivel fitting according to claim 1, characterized bythat the toothing (4) is designed as a part-circular toothed disc (41) with an external toothing (42) formed on a part-circular outer edge, which is coupled to the second lever (3) via a power shaft (6) forming the common axis (D), and the pawl (5) has a pivot arm (51) with teeth (52) facing the axis (D). [3] Swivel fitting according to one of the preceding claims, characterized by that the first control disc (7) has a recess (73) in which a control bolt (8) fastened to the first lever (2) is received, wherein the recess (73) is dimensioned such that the control bolt (8) is displaceable by the switching angle (β) relative to the first control disc (7). [4] Swivel fitting according to one of the preceding claims, characterized by that the first control disc (7) is designed as a disc spring or spring plate [5] Swivel fitting according to one of the preceding claims, characterized bythat the first control disc (7) is frictionally engaged with the toothing (4) and is mounted so as to be rotatable by a switching angle (β) relative to the first lever (2) [6] Swivel fitting according to one of the preceding claims, characterized by that the first control disc (7) has a switching contour (74) on an outer circumference, with which the pawl (5) can be pivoted from a locking position with the toothing (4) into a non-locking position. [7] Swivel fitting according to claim 6, characterized by that the pawl (5) has a recess (54) adjacent to the teeth (52) forming an internal toothing, in which the switching contour (74) lies in the locking position of the pawl (5) with the toothing (4). [8] Swivel fitting according to claim 7, characterized by that the edges of the pawl (5) enclosing the recess (54) are designed as support surfaces (55, 56) for supporting the pawl (5) on the switching contour (74) of the control disc (7). [9] Swivel fitting according to one of the preceding claims, characterized by that the second control disc (9) is designed as an annular disc with an elongated hole (93) receiving the common axis (D). [10] Swivel fitting according to claim 9, characterized by in that the second control disc (9) has a switching arm (92) which extends radially outwards in the direction of the longitudinal extent of the elongated hole (93) and which is received in a recess (44) formed on the circumferential edge of the toothed disc (41), the recess (44) being delimited in the adjustment direction (V) by a first stop (47) in the region of the external toothing (42) and in the return direction (R) by a second stop (45) in the region of a projection (43) adjoining the external toothing (42). [11] Swivel fitting according to claim 10, characterized bythat a first contact surface (96) of the switching arm (92) facing the first stop (47) and an outer flank (57) of an edge tooth formed on the free end of the pawl (5) are shaped such that upon relative movement of the levers (2, 3) in the return direction (R), the pawl can be pushed away from the external toothing (42) by the switching arm (92). [12] Swivel fitting according to claim 11, characterized by that an angle of incidence of the 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) to the radial of the axis of rotation (D) is between 8° and 12°, in particular 10°. [13] Pivoting fitting according to one of claims 10 to 12, characterized by that a radially outer end edge of the switching arm (92) projects radially outwards over the external toothing (42) in a switching position. [14] Pivoting fitting according to one of claims 10 to 13, characterized bythat a ramp (94) cooperating with the control bolt (8) is formed on a section of the second control disc (9) remote from the switching arm (92). [15] Swivel fitting according to one of the preceding claims, characterized by that the clamping mechanism has a spring element (11) with which the pawl (5) can be pressed against the toothing (4). [16] Swivel fitting according to claim 15, characterized by that the first lever (2) has a first cover (2a) and a second cover (2b), wherein the toothing (4) and the control disc (7) are received between lever heads (23) of the cover (2a, 2b), wherein the spring element (11) is fastened between the lever heads (23), circumferentially encompassing the toothing (4) and the control disc (7). [17] Swivel fitting according to one of the preceding claims, characterized by that the swivel fitting is designed for movable furniture parts on seating or reclining furniture. [18] Furniture (100) with a pivoting fitting (1) according to one of the preceding claims. [19] Furniture (100) according to claim 18, characterized by that the pivot fitting (1) adjustably fixes an armrest (103) or other adjustable furniture parts to a furniture body (101) of a piece of furniture (100) designed as a seat or reclining furniture.

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