Pivot fitting for pieces of furniture for sitting and/or lying on

A rotary fitting, in particular for seating and / or lying furniture, with a stop lever, a pawl, a locking device and at least one toothed ring, wherein the stop lever and the pawl knob can be rotated relative to one another in the direction of adjustment and direction return, wherein the stop lever and the toothed rim are coupled together so that the rotation of the stop bar and the ratchet lever in the adjustment direction is associated with the rotation and / or the rotary movement of the toothed rim with respect to the blocking device.

[0002] Swivel fittings of this type are also referred to as the upholstery, because the swivel fittings are regularly used for upholstered furniture. Regardless of this, the rotary fittings of the type mentioned are mainly used for adjusting the headrests or seat backs for seating and / or lying furniture. In addition, the swivel fittings of the type mentioned are also referred to as snap joints, because they latch in at least one direction of rotation and thus lock. In this way, it is ensured that the swivel fittings also freeze in certain positions of the setting under load. In this way, you can avoid unintentionally turning or retracting the rotary hardware.

[0003] In order to connect the swivel fitting with the seat and / or lying furniture, it has a buffer lever and a trigger. Each of these levers can, for example, be connected to the headrest, the second lever, for example, being connected to the backrest, for example. Then, the headrest can be rotated in relation to the backrest in the desired position. In order for the swivel fitting to hold the headrest in this position, the swivel fitting has a locking device and at least one toothed rim with a return direction and a form fit connection is provided which is intended to inhibit unintentional displacement of the swivel fitting in this direction. The stop lever and the pawl knob can be turned towards each other in a second direction, i.e. in a setting direction. Rotating in the direction of return is also possible under certain conditions,

[0004] When the stop lever and the pawl knob are rotated in relation to each other in the adjustment direction, this involves rotating and / or rotating the toothed rim with respect to the locking device. Depending on the division of the toothed rim or the tooth spacings, a plurality of adjustment positions are provided in which the locking device and the toothed rim form a positive fit in the return direction and consequently stop or in any case hinder the spillage in this direction. Suitable rotary fittings are known, for example, from DE 10 2011 017 301 A1. In addition, EP 1 284 447 A1 discloses a corresponding swivel fitting with two latches from which the invention emerges.

[0005] Modern furniture for sitting and / or lying down is becoming increasingly demanding that they can be set very precisely. This requires a precisely graduated possibility of adjustment in the form of rotary fittings of the type mentioned at the beginning. Rotary hardware is therefore required with a wide variety of setting positions. As a result, the rotary fittings, in particular the toothed end and the locking device, must be shaped as more and more filigree, which nevertheless impairs the stability of the rotary fittings. The known rotary fittings have the disadvantage that they can easily be damaged when used incorrectly.

The object of the present invention is thus to form and develop the above-mentioned rotary fitting mentioned in the introduction, so that the possibility of fine adjustment can be combined with high stability and thus durability.

This object is achieved in a pivot fitting according to the preamble of claim 1, in that the at least two latches in particular positions, preferably the adjustment positions, of the swivel fitting, in each case vary in degrees in the toothed rim.

[0008] By means of the invention, it has been recognized that the use of these at least two latches allows for a more accurate setting of the swivel fitting without having to make it more as a filigree and therefore less stable due to this reason. It results from this circumstance that these at least two latches in certain positions of the rotary fitting, in particular when turning the buffer lever and the ratchet lever in relation to each other in the direction of adjustment, enter into a different degree in the toothed rim. In these specific positions, it can be set positions or set positions. It is, however, advantageous if the pawls in a particular range of movement of the swivel fitting in each particular position of the swivel fitting are in each case to varying degrees in the toothed rim. How far the latches in a particular rotary fitting position enter the toothed rim depends on where the latches and the adjacent teeth are touching. As the rotary fitting is moved in the direction of adjustment, the depth of the pawl's entry changes. Preferably, the latch immediately after the passing of the toothed tooth enters completely, i.e. the maximum in the toothed rim, while the latch immediately before the passing of the toothed rim tooth enters a minimum in the toothed rim.

[0009] Immediately after the latch has passed the toothed tooth, the latch grips for the corresponding tooth. As a result, the tooth and the latch form a form-fitting connection which prevents the gear ring being rotated relative to the latch in a different direction. In this rotary screw adjustment position, the stop lever and the ratchet lever can not be rotated without problem in relation to each other in the return direction. The swivel fitting can be immobilized in each adjustment position in such a way that it avoids inadvertent turning the swivel fitting in the return direction.

[0010] Since the at least two latches at least in certain positions in a predetermined position, in particular over the entire range of displacement, of the swivel fitting each time enter the rim of a different degree, the latches pass the toothed rivets at various positions of the swivel fitting. . This means that when the rotating fitting is rotated in the direction of adjustment, the pawl passes two consecutive teeth of the toothed rim in succession and thus determines two setting positions. The at least one further detent defines a further setting position between these positions of the rotary hardware setting, because a further pawl between the setting positions set by one pawl passes,

[0011] The possibility of adjusting the rotatable fitting is thus determined not only by the number and spacing of the teeth of the toothed rim. When the toothed rim is rotated by one tooth in relation to the pawl further in the adjustment direction, preferably between so many further rotary fitting positions are obtained, in which the pawl, after passing the toothed rim, forms a cog-shaped rim, as many corresponding latches are provided. At the same time, it is only a condition that all ratchets come in varying degrees through the respective rotating area of ​​the rotary fitting into the toothed rim. With two locking latches, the swivel fitting can therefore be adjusted twice as accurately as with one latch. With three latches, the swivel fitting can be set three times more accurately than with one pawl and so on. In other words, the number of setting positions can be by a multiple of more, which corresponds to the number of detents. This applies in particular when the latches are to varying degrees in the toothed rim by means of a significant or predetermined, in particular the entire turning area of ​​the swivel fitting and in any position of the swivel fitting.

[0012] A gear ring with large and wide teeth can therefore be provided in the construction of the rotatable hardware. The toothed ring can therefore take up large forces and is therefore very stable so that damage due to improper use of the swivel fitting is avoided. In order to shape the swivel fitting as nevertheless possible to set accurately, i.e. to predict a plurality of rotary fitting positions, from which the swivel fitting can not easily be rotated in the return direction (position of the setting), a plurality of latches are provided, each of which latches it is preferably shaped in a sufficiently massive manner so as to also be able to receive large forces so as to avoid damages at the latches.

[0013] In the first preferred form of the pivot fitting, at least two latches are provided so that when rotating the stop lever and the pawl lever in the adjustment direction at substantially regular angular intervals, the position of the swivel fitting is made available. In this way, the adjustment positions can be evenly distributed over the rotatable fitting area, which is particularly comfortable. For example, with two pawls, the second pawl can determine the position of the adjustment exactly in the middle of the travel path or the switching angle between two set positions of the first pawl.

Alternatively or additionally, the at least two latches may be provided such that when turning the stop lever and the pawl lever in the adjustment direction between two consecutive positions defined by the pawl, at least one further catch determines the position of the setting. In this way, a high number of setting positions can be made available, which increases the comfort when adjusting the rotary hardware. In addition, preferably all consecutive ratchets define between successive, predetermined positions set by the first pawl of the setting positions respectively one further position of the setting.

[0015] Alternatively or additionally, the at least two latches may also be provided such that when rotating the stopper and the pawl in the adjustment direction, the individual adjustment positions are spaced about substantially the same angles of rotation. The positioning positions can then be evenly distributed, preferably over the entire rotatable fitting area.

[0016] Particularly functional and easily structurally is when these at least two latches are spring loaded towards the toothed rim. The pawls can then adhere to at least one tooth of the toothed rim and enter the toothed rim as far as the contact between the pawl and the associated tooth allows. In this way, it is also ensured that the pawls after passing a tooth grip directly behind it to provide the shape connection and thus the position of the setting. The retraction force of a given spring means can ensure that the pawl in the setting position enters the toothed rim as far as possible. Regardless of this, to provide a function, the pawls are advantageous when at least one spring means is associated with each pawl.

[0017] In order to be able to provide a possibly large swivel fitting area and / or to be able to flexibly select the adjustment region, the at least one toothed rim can be shaped as a toothed disk with perimetrically positioned teeth. Thus, the toothed ring has no ends, but the teeth are located continuously around the toothed rim.

[0018] The stability of the rotatable hardware can be further increased by the improved force distribution avoiding load peaks when two or more gear rims are provided. Then, from the constructional perspective, it is additionally possible when the at least two latches are provided such that when turning the stop lever and the pawl in the adjustment direction, they each at the same time engage at least two toothed rings, preferably all of the toothed rings.

[0019] In an additional advantageous rotary fitting, it is provided that with the engagement of the at least one pawl and the gear ring, the buffer lever and the pawl knob can be turned in the return direction and / or the stopper lever can be rotated relative to the gear rim in the return direction. As a result, a snap-clamp joint can be made available. When adjusting the rotary fitting in the return direction, the shape connection between the latch and the toothed ring counteracts this adjustment first. Since, however, the toothed rim and the stopper lever are not permanently connected to each other, but preferably frictionally by the clamping forces, a return adjustment can be achieved with a sufficiently applied force. It happens then, when the static friction between the buffer lever and the toothed rim is overcome. Since, in such a snap-joint joint, the pawls and the toothed rim are moved only in one direction relative to each other if necessary, it is suggested that the toothed rim is shaped as a toothed wheel. In this way, no end position is reached and the rotating hardware can be moved further and further.

[0020] In particular, for a structurally simple and at the same time functional shape of the rotary fitting, the stopper lever can be held frictionally relative to the toothed rim. The frictional force can be set by choosing the friction surface, materials or compressive forces. In this way, a limit force can be determined beforehand to overcome static friction, from which the swivel fitting can be turned in the direction of return despite the interlocking engagement of the latch and the toothed rim.

[0021] In order to set the determined compressive force between the stop lever and the toothed rim, further constructions may be provided between the stop lever and the toothed rim, a clamping device may be provided. With a particularly simple rotary device, the clamping device is shaped as a clamping screw.

[0022] For adjusting the friction value, which is effective between the stop bar and the at least one toothed ring, a clamping disk provided between the stop lever and the at least one toothed rim may be provided. The clamping disk preferably has a high frictional value, so that even at moderate clamping forces a high friction between the bumper lever and the at least one toothed ring can be achieved.

[0023] The swivel fitting can alternatively also be configured as a latching fitting so that the stop lever relative to the ratchet at the latching engagement of the latch and the toothed rim can not be turned without damage in the return direction. In order to be able to rotate the stop lever relative to the pawl lever in the return direction, it must first remove the interlocking latch and gear rim. It can be achieved automatically by rotating the swivel fitting to the end position in the adjustment direction first. For this purpose, various devices are known from the prior art, which can also be used substantially also for the present rotary fitting. It can therefore be essentially foreseen, that the stopper lever and the pawl knob can be rotated without engagement between the at least one pawl and the toothed ring relative to each other in the return direction. This possibility of rotation in the return direction exists preferably starting from the end position and / or up to the final position of the rotary hardware.

[0024] The invention will be explained in more detail below based on a drawing showing only embodiments. In the drawing, the first rotary fitting according to the invention is shown in perspective view, Fig. 2 shows the detail of the swivel fitting of Fig. 1 in section,

Fig. 3 is a rotary fitting of Fig. 1 in an exploded view,

4 shows a second rotary fitting according to the invention in a perspective view,

Fig. 5 shows the detail of the swivel fitting of Fig. 4 in section and

Fig. 6 is a rotary fitting of Fig. 4 in an exploded view.

Fig. 1 shows the swivel fitting 1 in the form of a snap-fit ​​joint for an upholstered furniture with a stop lever 2 and a pawl lever 3. The stop lever 2 and the pawl knob 3 can be combined with various components of the seat and / or lying furniture. , for example with a headrest and a backrest or a wrist rest and seat. In this way, one structural element, e.g. a headrest or a hand rest, can be rotated relative to another structural element, e.g. a backrest or a seat back. Thus, the furniture to itself and / or to lie down can be moved to a position that is comfortable for the user.

The rotary hardware 1 can be rotated in two opposing directions. Thus, the stopper lever 2 can be rotated relative to the ratchet lever 3 in the adjustment direction E and in the return direction R. In the direction E of adjustment, the swivel fitting 1 can be moved quite easily until the swivel fitting 1 reaches the desired position. As shown in particular in FIGS. 1 and 2, during this rotation in the adjustment direction E, two toothed rings 4 in the form of toothed discs are rotatable with respect to the locking device 5. The gear rings 4 can be maintained in this case with a rotational adjustment on the tensioning bolt 6. The locking device 5 comprises two latches 7, 7 ', which are spring loaded by separate spring means 8 in the direction of the toothed rims 4 and are essentially kept rotatable in the pawl setting means 9. The spring means 8 thus exert a return force on the pawls 7, 7 'which press the latches 7, 7' against each other. toothed rims 4. The latches 7, 7 'are otherwise adopted and retained in separate fixing elements 9 of the ratchet lever 3, so that the ring gears 4 can rotate without engaging when turning the swivel fitting 1 in the direction E of the adjustment at the pawls 7, 7'. contouring. The locking pawls 7, 7 'pass the tooth on the toothed teeth 4 and slide on at least one side of the teeth 10. toothed rims 4. Lugs 7, 7 'are otherwise adopted and retained in separate fixing elements 9 of the ratchet lever 3 so that the ring gears 4 when rotating the swivel fitting 1 in the direction E of the adjustment at the pawls 7, 7' can be discharged without interlocking. The locking pawls 7, 7 'pass the tooth on the toothed teeth 4 and slide on at least one side of the teeth 10. toothed rims 4. Lugs 7, 7 'are otherwise adopted and retained in separate fixing elements 9 of the ratchet lever 3 so that the ring gears 4 when rotating the swivel fitting 1 in the direction E of the adjustment at the pawls 7, 7' can be discharged without interlocking. The locking pawls 7, 7 'pass the tooth on the toothed teeth 4 and slide on at least one side of the teeth 10.

[0027] For each position of the illustrated and advantageous rotatable fitting 1, the two locking latches 7, 7 'vary to a varying extent in the toothed ring 4. This is described for better understanding below on the basis of fig. 2 and only one toothed rim 4, in particular that the use of two or more ring gears 4 is not necessary, but only optional. In the position of the rotary fitting 1 shown in Fig. 2, the latch 7 has just passed the tooth 10 of the toothed rim 4 and enters a maximum into the intermediate space between this tooth 10 and the next tooth 10. The latch 7 forms in this connection a molded connection in the opposite direction with the just teeth 10. wherein the latch 7 rests on one side on the side of just a bevel 10 and a retainer 9 in the ratchet lever 3.

The left latch 7 'only slightly engages the toothed rim 4 and does not form a positive fit in this position with the toothed ring 4. In order to lock the rim 4, only the right latch 7 is active, but not the left latch 7'.

[0029] However, the behavior would have been different if the ring gear 4 were rotatably moved a little further, namely by a rotational adjustment angle, which is smaller than the range of angles determined by the width of the tooth 10 of the toothed rim 4. Then, the rotary movement of the toothed rim 4 in the opposite direction would lead for the positive engagement of the left latch 7 'as previously described for the right latch 7. In this case, the right latch 7 would then not be active with regard to blocking the further change of the rotatable toothed rim 4.

[0030] Each of the positions in which there is a positive connection between the pawl 7, 7 'and the toothed ring 4 is the position of the setting in which the rotary sleeve 1 can be rotated by turning in the direction E of the setting and in which the rotating fitting 1 prevents inadvertent return start-up. As a result of the two latches 7, 7 ', a large number of setting positions can be made available despite the relatively wide and large teeth 10 of the toothed rim 4. The toothed rim 4 therefore does not have to be rotatably moved relative to the locking device 5 around the entire tooth 10 to get to the next setting position, but only by the range of the angle which corresponds to the half of the tooth 10.

[0031] Looking purely functionally, the rotary fitting 1 shown in FIGS. 1 to 3 offers the same setting options as a swivel fitting with only one latch, but a toothed rim with twice as many but twice smaller teeth. The number of adjustment positions could be further increased if further latches would be provided in such a way that in particular positions in each case compared with all other pawls they enter to a different degree in the toothed rim.

[0032] As is particularly evident from Fig. 3, in the case of the articulated fitting 1 shown in Figures 1 to 3, it is a snap-lock fitting. In spite of the locking engagement of the pawl 7, 7 'and the ring gears 4, the swivel fitting 1 can then be rotated in the return direction R, if sufficient force is applied. The stop lever 2 and the toothed rims 4 are, in fact, only frictionally connected to each other. When the force exerted on the stopper 1 in the direction R of the return is large enough, the static friction between the stop lever 2 and the toothed rims 4 is overcome. Then the stopper lever 2 is rotated relative to the ratchet lever 3 and relative to the sprockets 4 in the return direction R, while the toothed ring 4 and the pawl 7, 7 'remain in the blocking meshing.

Between the toothed rims 4 is a pawl knob 3 which has two retaining elements 9 for receiving two detents 7, 7 'and both spring means 8, which engage the pawls 7, 7' as a result of their return force to the toothed rims 4. 7, 7 'are made such that the pawls 7, 7' each time enter both the toothed rings 4 on the two sides of the pawl lever 3. To this end, the pawls 7, 7 'project far apart from the pawl lever 3 on both sides. cover the latches 7, 7 'outwards, cover 11 is provided on each side of the swivel fitting 1.

[0034] A free sleeve 12 is additionally provided in the ratchet lever 3 which, in order to reduce the clamp between the toothed rims 4 and the ratchet lever 3, is formed wider than the ratchet lever 3 itself. In order to further reduce the friction between the free sleeve 12 and the ratchet lever The outside diameter of the free sleeve 12 is smaller than the inner diameter of the receiving free sleeve 12 of the opening 13 of the ratchet lever 3.

[0035] The stop lever 2 comprises the toothed wheels 4 on their outer sides by means of the clamping levers 14, wherein clamping discs 15 with large friction values ​​are provided between the clamping levers 14 and the toothed rims 4. The clamping discs 15 are hereby fixed without rotary adjustment by means of the projections 16 and the corresponding openings 17 at the clamping levers 14. In order to be able to provide sufficient friction forces that prevent unintentional turning of the rotary lever 1 in the direction of return R, the clamping discs 15 are pressed against the rims. 4 of the toothed wheels 4, namely due to the clamping force which is supplied by the tensioning bolt 6. The tensioning bolt 6 is inserted on one side by the swivel fitting 1 and on the other side of the swivel fitting 1 is counter-balanced by the nut 18.

[0036] Figures 4 to 6 show the swivel fitting 1 'also in the form of a snap-clamp joint, which is structurally and functionally very similar to that shown in Figures 1 to 3 of the pivot point 1. Thus for both rotary fittings 1.1 'the same reference numerals are used. In addition, the following describes only the variations of the 1 'rotary fitting according to FIGS. 4 to 6 in comparison to the rotatable fitting 1 according to FIGS. 1 to 3. This difference consists, for example, in that the ratchet lever 3' is multi-part formed and has a latch carrier. . The latches 7 ", 7 '" are fully received in the fixing elements 9' of the pawl carrier 20. The latches 7 ", 7 '' thus do not protrude outwardly from the latch carrier 20. Outside, retaining elements 9 'for latches 7 ", 7' "Are closed by two free levers 21, which are fixed by means of the connecting pins 22 on the latch carrier. The free levers 21 and the latch carrier 20 together form the latch lever 3 '.

A further difference of the rotary fitting 1 'according to FIGS. 4 to 6 with respect to the rotatable fitting 1 according to FIGS. 1 to 3 consists in that the pawl tips 7 ", 7'" guided in the pawl fixing elements 9 'are rounded. The fixing elements 9 'of the pawl carrier 20 are also rounded in a suitable place, i.e. in a manner corresponding to the roundings of the pawls 7 ", 7'".