EP3865009A1 - Swivel joint for the dampened adjustment of a functional part - Google Patents

Abstract

The invention relates to a swivel joint (1) for adjusting a functional part of a piece of furniture with a mounting lever (2) for mounting the swivel joint (1) on the furniture and a swivel lever (3) for carrying and adjusting the functional part, the swivel joint (1) being supported by a Adjustment position is adjustable to a reset position and back, wherein in the adjustment position the assembly lever (2) and the pivot lever (3) are mutually pivotably connected from an initial position to an end position about a pivot axis (4) in an adjustment direction (E), wherein in the Adjustment position of the pivot lever (3) in a plurality of locking positions provided between the starting position and the end position by a blocking, interlocking interlocking of a locking mechanism (5) against pivoting in the return direction (R) opposite to the adjustment direction (E), whereby the locking mechanism ( 5) at least one locking cam (7) and at least one in a e direction relative to the locking cam (7) includes swiveling toothed ring (6) and wherein in the setting position the locking cams (7) for the positive interlocking of the locking mechanism (5) in the direction of the toothed ring (6) so spring-loaded and the locking cam (7) so movable a guide (8) is held so that the locking cam (7) and the ring gear (6) when adjusting the swivel joint (1) relative to the mounting lever (2) in the setting position slide against each other and interlock step by step in a return direction (R) in a form-locking manner. In order to avoid low-quality noises from the swivel joint, a lubricating grease (16) is provided between the toothed ring (6) and the locking cam (7) and / or between the locking cam (7) and the guide (8).

Description

The invention relates to a swivel joint for adjusting a functional part, in particular a head part, a foot part or an armrest, a piece of furniture, in particular seating furniture and / or upholstered furniture, with a mounting lever for mounting the swivel joint on the furniture and a swivel lever for carrying and adjusting the functional part, wherein the swivel joint is adjustable from a set position to a reset position and back, wherein in the set position the mounting lever and the swivel lever are connected to each other from an initial position to an end position about a hinge swivel axis in a setting direction, wherein in the set position the swivel lever in a plurality of between The locking positions provided for the starting position and the end position are locked by a blocking, positive interlocking of a locking mechanism against pivoting in the return direction opposite to the setting direction, the locking mechanism comprises at least one locking cam and at least one toothed ring pivotable in one direction relative to the locking cam and wherein in the setting position the locking cam is spring-loaded in the direction of the toothed ring for the positive interlocking of the locking mechanism and the locking cam is held movably on a guide in such a way that the locking cam and the toothed ring when adjusting the swivel joint with respect to the assembly lever in the setting position slide against each other and interlock step by step in a return direction in a form-fitting blocking manner.

Swivel joints for adjusting a functional part of a piece of furniture are known in different configurations. The swivel joints are mostly used to adjust a head part, a foot part or an armrest of a piece of seating furniture, which is typically upholstered furniture. The swivel joints have a mounting lever with which the swivel joints are fixed to the respective piece of furniture. In addition, a pivot lever is provided that the respective Functional part carries and the respective functional part pivots around the assembly lever. For this purpose, the assembly lever and the pivot lever are designed to be pivotable about a joint pivot axis in an adjustment direction relative to one another from an initial position into an end position.

When adjusting the pivot lever with respect to the mounting lever in the adjustment direction starting from the starting position, different locking positions are passed one after the other. The user of the furniture adjusts the swivel joint so far or swivels the swivel lever so far in the setting direction until he has set a comfortable position for the corresponding functional part. So that the functional part at least approximately maintains this position and does not accidentally move back into the starting position, the pivot lever can only be moved back to the next locking position. In the locking position, a locking mechanism engages with one another in a form-fitting and blocking manner and thus locks the pivot lever relative to the assembly lever against pivoting in the return direction opposite to the adjustment direction. The locking mechanism is formed at least by a locking cam and a toothed ring which is rotatable with respect to the locking cam. To lock the locking mechanism, the locking cam can engage with the toothing of the ring gear from the outside in a form-fitting manner.

In order to still be able to reset the pivot lever back into the starting position, the pivot joint can be adjusted from the previously described setting position into a reset position. For this purpose, the pivot lever must typically first be adjusted in the adjustment direction up to an end position, whereby the locking cam is brought into a release position out of engagement with the ring gear in order to adjust the pivot joint into the reset position. As long as the locking cam is in the release position and the swivel joint is in the reset position, the swivel lever can be moved back into an initial position in the reset direction. In the starting position, the locking cam is again in engagement with the ring gear and thus the swivel joint brought back into the setting position so that the swivel joint can again be individually adjusted in the setting direction to allow the user a comfortable sitting position.

The toothed ring and the locking cam then slide off one another, while the locking cam is moved slightly back and forth along a guide in order to jump one tooth gap in relation to the toothed ring. However, so that the locking mechanism can nevertheless interlock with one another in a locking position when the pivot lever is adjusted in the return direction during this time, the locking cam is spring-loaded against the ring gear. In the known swivel joints, the adjustment of the swivel lever in the adjustment direction is associated with a characteristic noise which can only be damped to a limited extent by the furniture, in particular by upholstery. In particular, in those cases in which the characteristic noise is a more or less rattling noise, this is perceived by the user of the furniture as being of inferior quality, while, on the other hand, full clacking noises are usually classified as valuable.

The present invention is therefore based on the object of designing and developing the pivot joint mentioned at the outset and described in more detail in such a way that characteristic noises of the pivot joint of inferior quality are avoided.

In the case of a swivel joint according to the preamble of claim 1, this object is achieved in that a lubricating grease is provided between the toothed ring and the locking cam and / or between the locking cam and the guide.

By using a noise-dampening grease between the ring gear and the locking cam and / or between the locking cam and the guide, the volume of the noises generated when adjusting the swivel joint in the adjustment direction can be reduced so significantly that also as rattling noises recognized as inferior in quality are no longer consciously perceived by the user. This, too, subconsciously creates a comparatively valuable impression of the swivel joint. The lubricating grease acts in particular when adjusting the pivot lever in the adjustment direction when the pivot joint is in the adjustment position. If the swivel joint is in the reset position, the swivel lever can preferably be swiveled noiselessly in the setting direction and the reset direction anyway. The more pronounced the noise-dampening properties of the lubricating grease, the greater the effect of the lubricating grease.

In a first particularly preferred embodiment of the swivel joint, the locking cam has at least one, preferably at least two, in particular at least three, further in particular at least four teeth corresponding to the toothed ring. In this way, several teeth of the ring gear can come into positive locking engagement with the locking cam and consequently greater holding forces can be absorbed by the correspondingly blocked locking mechanism in the locking position.

Alternatively or additionally, at least two, preferably at least three, in particular at least four, locking cams and / or at least two, preferably at least three, in particular at least four, toothed rims can be provided. In this case too, if necessary, higher holding forces can be absorbed, the increments when adjusting the swivel joint in the adjustment direction can be reduced, and the swivel joint can be stiffened as a whole. It is further particularly preferred if at least one locking cam is assigned to each toothed ring. A compact design with good functionality can then be achieved.

So that the swivel joint can be adjusted back into its starting position without any problems, it is expedient if the locking mechanism is disengaged in the reset position of the swivel joint. As a result, in the reset position of the swivel joint, the swivel lever is then adjusted with respect to the assembly lever released in the reset direction. The pivot lever can then, if necessary, be adjusted back into the starting position, specifically also if necessary from the opposite end position of the pivot lever.

The adjustment of the pivot joint from the setting position into the return position can be effected in a particularly simple manner by adjusting the pivot lever relative to the assembly lever. Thus, the pivot joint can be adjusted from the set position into the reset position by adjusting the pivot lever relative to the assembly lever into the end position.

Alternatively or additionally, for the sake of simplicity, it is advisable if the adjustment of the pivot joint from the reset position into the setting position is also effected by adjusting the pivot lever relative to the assembly lever. Thus, the pivot joint can be adjusted from the reset position into the setting position by adjusting the pivot lever relative to the mounting lever into the starting position.

Lubricating greases that have a high resistance to oxidation have proven to be particularly useful, since the swivel joints in the furniture have to be functional for very long periods of time and without separate maintenance. It is therefore particularly useful if the lubricating grease has an oxidation resistance according to DIN 51808, in particular as of February 2018, of less than 950 hPa, preferably less than 750 hPa, in particular less than 550 hPa, further in particular less than 350 hPa.

Alternatively or additionally, the lubricating grease can have a lower usage temperature according to DIN 51502, in particular as of August 1990, which is less than or equal to -10 ° C, preferably less than or equal to -20 ° C. In this way, the functionality of the swivel joint is ensured even in very different applications, if necessary when used outdoors or in indoor spaces that sometimes cool down significantly.

A smooth function of the swivel joint with high noise insulation at the same time can be achieved if the lubricating grease has a consistency or an NLGI class (National Lubricating Grease Institute) according to DIN 51818, in particular as of December 1981, of at least 1, preferably of at least 2, in particular of at least 3, further in particular of 4. With a consistency of 1, the grease is very soft, so that the movement of the locking cam is only slightly hindered. However, the noise insulation is then also comparatively low. At a consistency of 4, the grease is almost solid, which is advantageous for noise insulation, but can be problematic for freedom of movement. Against this background, it can be preferred in many applications if the consistency has a value of 2 or 3. The grease can then be referred to as either soft or pliable.

In order to increase the long-term stability of the lubricating grease and to reduce a corresponding exudation of oil or the tendency to gum up, it can be useful if the lubricating grease has a lubricating oil content of less than 80%, in particular less than 75%, in particular less than 70%. , having. The lower the proportion of lubricating oil, the better it is in terms of longevity. However, this can increasingly impair the free movement of the locking cam along the guide.

It is also useful if the lubricating grease is insensitive to moisture. Moisture can act on the swivel joint, for example when cleaning the furniture, directly or in the form of humidity. In order to still achieve a high long-term stability, it can be expedient if the lubricating grease has a behavior against water according to DIN 51807-1, especially as of April 1979, and DIN 51807-2, especially as of March 1990, that the Class C, E, G or K can be assigned. In all of these cases, the water only brings about a slight change, with the upper application temperature in class C at 60 ° C, in class E at 80 ° C, in class G at 100 ° C and in class K at 120 ° C. Furthermore, the test temperature in classes C and E is 40 ° C and in classes G and K 90 ° C.

So that sufficient resistance to welding, for example when welding the swivel joint to the furniture, or other thermal loads can be ensured, it is advisable if the lubricating grease has a temperature resistance of at least 160 ° C, preferably of at least 180 ° C, in particular of at least 200 ° C. Alternatively or additionally, for the same reason, a lubricating grease with an upper operating temperature according to DIN 51807-1, in particular with the status of April 1979, and DIN 51807-2, in particular with the status of March 1990, of 160 ° C, preferably 180 ° C, in particular of 200 ° C can be used.

Fig. 1A-B

ein erfindungsgemäßes Schwenkgelenk in einer Einstellstellung jeweils in unterschiedlichen Schnittansichten und

Fig. 2A-B

das Schwenkgelenk aus der Fig. 1 in der Rückstellstellung in den Schnittansichten der Fig. 1A-B.

The invention is explained in more detail below with the aid of a drawing showing only one exemplary embodiment. In the drawing shows

Figures 1A-B

a swivel joint according to the invention in a setting position each in different sectional views and

Figures 2A-B

the swivel joint from the Fig. 1 in the reset position in the sectional views of Figures 1A-B .

In the Figures 1A-B a swivel joint 1 is shown in an adjustment position. The swivel joint 1 comprises a mounting lever 2 for mounting on a chair (not shown) and a swivel lever 3 for holding a functional part of the chair, in particular in the form of a head part. The pivot lever 3 is provided so that it can pivot about an articulated pivot axis 4 with respect to the assembly lever 2. The swivel joint 1 shown is in an adjustment position in which a locking mechanism 5 is in positive locking engagement. The locking mechanism 5 comprises a ring gear 6 of the pivot lever 3 and a Locking cam 7 fixed with respect to the assembly lever 2. The locking cam 7 is also movably held on a guide 8 and is set against the ring gear 6 via a spring means 9.

If the pivot lever 3 is pivoted in the setting direction E, the ring gear 6 and the locking cam 7 slide off one another and consequently enable the pivot lever 3 to be adjusted in the setting direction E. However, if the pivot lever 3 is moved in the opposite return direction R, the pivot joint 1 moves into a locking position and the locking mechanism 5 forms a blocking form fit in the return direction R, which consequently prevents further displacement of the pivot lever 3 in the return direction R. The form fit is provided by a corresponding engagement of the toothing 10 of the locking cam 7 in the toothing 11 of the ring gear 6.

The pivot lever 3 can therefore only be adjusted in the adjustment direction E in the illustrated setting position of the pivot joint 1. If the pivot lever 3 reaches an end position in the setting direction E, a reset cam 12 shortly beforehand comes into contact with a control cam 13 and then pushes it into a release position in which the control cam 13 engages with a release cam 14 of the locking cam 7 and the Locking cam 7 is displaced against the restoring force of the spring means 9 to such an extent that the toothing 10 of the locking cam 7 disengages from the toothing 11 of the ring gear 6 of the pivot lever 3. The swivel joint 1 is thus adjusted into the reset position and the swivel lever 3 can now be moved in the reset direction R with respect to the assembly lever 2. The swivel joint 1 in the reset position is in the Figures 2A-B shown.

The pivot lever 3 can be brought back into an initial position in the return direction R. Shortly before the pivot lever 3 reaches this starting position, an adjusting cam 15 comes into contact with the control cam 13 and pushes it away from the release cam 14 of the locking cam 7, so that the control cam 13 and the release cam 14 disengage and the spring element 9 sets or presses the toothing 10 of the locking cam 7 again against the toothing 11 of the ring gear 6. The swivel joint 1 is then transferred again into the setting position, which enables the swivel lever 3 to be set without the swivel lever 3 being able to inadvertently move significantly back into the return direction R.

In the case of the swivel joint 1, a lubricating grease 16 is applied at least essentially completely along the toothing 11 of the ring gear 6. In addition, the toothing 10 of the locking cam 7, which has a plurality of teeth corresponding to the ring gear 6, is provided with the same lubricating grease 16. In this way it is ensured that there is lubricating grease 16 between the meshing sections of the ring gear 6 and the locking cam 7. If the locking cam 7, in particular the toothing 10 of the locking cam 7, now slides on the gear rim 6, in particular on the toothing 11 of the gear rim 6, of the swivel lever 3 when the swivel joint 1 is adjusted in the setting direction E, and back and forth in the guide 8 is adjusted, this movement of the locking cam 7 is damped. In particular, the corresponding teeth of the toothings 10, 11 of the ring gear 6 and of the locking cam 7 do not directly collide with one another. The lubricating grease 16 provided in between therefore dampens the engagement of the locking mechanism 5 in one another. In the illustrated locking cam 7, the toothing 10 comprises, for example, seven teeth.

Furthermore, a lubricating grease 16 is provided between the locking cam 7 and the guide 8 for guiding the locking cam 7. For the sake of simplicity, this can be the same lubricating grease 16 that is also provided between the ring gear 6 and the locking cam 7. Due to the lubricating grease 16 provided between the guide 8 and the locking cam 7, the adjustment of the locking cam 7 along the guide 8 can also take place in a more silent and dampened manner. By using the lubricating grease 16 it is achieved overall that the swivel joint 1 can be adjusted almost noiselessly not only in the return position but also in the setting position. The guide 8 of the Locking cam 7 is neither on the in the Fig. 1 and 2 to the side of the locking cam 7 is limited to the surfaces of the assembly lever shown, nor do these surfaces have to be provided with grease 16. For example, the guide 8 can alternatively or additionally be formed by surfaces which are provided in a direction parallel to the joint pivot axis 4 in front of and behind the locking cam 7 or at least parts of the locking cam 7. In the illustrated and in this respect preferred pivot joint 1, these surfaces are formed, for example, by the housing parts 17, 18 of the pivot joint 1, between which the locking cam 7 is received and guided.

List of reference symbols

1

Swivel joint

2

Mounting lever

3

Swivel lever

4th

Articulated pivot axis

5

Lock

6th

Ring gear

7th

Locking cam

8th

guide

9

Spring means

10.11

Interlocking

12th

Reset cam

13th

Control cam

14th

Release cam

15th

Adjusting cam

16

Grease

17.18

Housing part

Claims (12)

Swivel joint (1) for adjusting a functional part, in particular a head part, a foot part or an armrest, a piece of furniture, in particular seating furniture and / or upholstered furniture, with an assembly lever (2) for mounting the swivel joint (1) on the piece of furniture and a swivel lever (3) for carrying and adjusting the functional part, the swivel joint (1) being adjustable from an adjustment position to a return position and back, whereby in the adjustment position the assembly lever (2) and the pivot lever (3) against each other from an initial position to an end position around a joint pivot axis ( 4) are pivotally connected in an adjustment direction (E), whereby in the adjustment position the pivot lever (3) is in a plurality of locking positions provided between the starting position and the end position by a blocking interlocking interlocking of a locking mechanism (5) against pivoting in the direction of adjustment (E) locked in the opposite return direction (R) The locking mechanism (5) comprises at least one locking cam (7) and at least one toothed ring (6) which can be pivoted in one direction relative to the locking cam (7), and wherein in the setting position the locking cam (7) for interlocking the locking mechanism (5) spring-loaded in the direction of the ring gear (6) and the locking cam (7) is movably held on a guide (8) in such a way that the locking cam (7) and the ring gear (6) when the swivel joint (1) is adjusted relative to the assembly lever (2 ) slide against each other in the setting position and interlock step by step in a return direction (R) in a form-fitting blocking manner,
characterized in that
a lubricating grease (16) is provided between the ring gear (6) and the locking cam (7) and / or between the locking cam (7) and the guide (8). Swivel joint according to claim 1,
characterized in that
the locking cam (7) has at least one, preferably at least two, in particular at least three, further in particular at least four, tooth corresponding to the toothed ring (6). Swivel joint according to claim 1 or 2,
characterized in that
at least two, preferably at least three, in particular at least four, locking cams (7) are provided and / or that at least two, preferably at least three, in particular at least four, toothed rims (6) are provided. Swivel joint according to one of Claims 1 to 3,
characterized in that
in the reset position the locking mechanism (5) is disengaged and in the reset position the adjustment of the pivot lever (3) relative to the assembly lever (2), in particular from the end position, in the reset direction (R) back to the starting position is enabled. Swivel joint according to claim 4,
characterized in that
the swivel joint (1) can be moved into the reset position in the end position by adjusting the swivel lever (3) in relation to the assembly lever (2). Swivel joint according to claim 4 or 5,
characterized in that
the swivel joint (1) can be adjusted into the initial position into the setting position by adjusting the swivel lever (3) in relation to the assembly lever (2). Swivel joint according to one of Claims 1 to 6,
characterized in that
the lubricating grease (16) has an oxidation resistance according to DIN 51808 of less than 950 hPa, preferably less than 750 hPa, in particular less than 550 hPa, further in particular less than 350 hPa. Swivel joint according to one of Claims 1 to 7,
characterized in that
the lubricating grease (16) has a lower usage temperature according to DIN 51502 of less than or equal to -10 ° C, preferably less than or equal to -20 ° C. Swivel joint according to one of Claims 1 to 8,
characterized in that
the lubricating grease (16) has a consistency or NLGI class according to DIN 51818 of at least 1, preferably of at least 2, in particular of at least 3, further in particular of 4. Swivel joint according to one of Claims 1 to 9,
characterized in that
the lubricating grease (16) has a lubricating oil content of less than 80%, in particular less than 75%, in particular less than 70%. Swivel joint according to one of Claims 1 to 10,
characterized in that
the lubricating grease (16) has a behavior against water according to DIN 51807-1 and DIN 51807-2 of class C, E, G or K. Swivel joint according to one of Claims 1 to 11,
characterized in that
the lubricating grease (16) has a temperature resistance of at least 160 ° C, preferably of at least 180 ° C, in particular of at least 200 ° C and / or that the lubricating grease has an upper operating temperature according to DIN 51807-1 and DIN 51807-2 of 160 ° C, preferably 180 ° C, in particular 200 ° C.

Images