EP3865009A1 - Articulation à pivot destinée au réglage amortis d'une partie fonctionnelle - Google Patents

Articulation à pivot destinée au réglage amortis d'une partie fonctionnelle Download PDF

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Publication number
EP3865009A1
EP3865009A1 EP21154753.4A EP21154753A EP3865009A1 EP 3865009 A1 EP3865009 A1 EP 3865009A1 EP 21154753 A EP21154753 A EP 21154753A EP 3865009 A1 EP3865009 A1 EP 3865009A1
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EP
European Patent Office
Prior art keywords
swivel joint
lever
locking
locking cam
adjustment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21154753.4A
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German (de)
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferdinand Lusch GmbH and Co KG
Original Assignee
Ferdinand Lusch GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferdinand Lusch GmbH and Co KG filed Critical Ferdinand Lusch GmbH and Co KG
Publication of EP3865009A1 publication Critical patent/EP3865009A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/38—Support for the head or the back for the head
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/50—Supports for the feet or the legs coupled to fixed parts of the chair
    • A47C7/506—Supports for the feet or the legs coupled to fixed parts of the chair of adjustable type
    • A47C7/5066—Supports for the feet or the legs coupled to fixed parts of the chair of adjustable type by rotation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/54—Supports for the arms
    • A47C7/541—Supports for the arms of adjustable type

Definitions

  • 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
  • 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.
  • a pivot lever is provided that the respective Functional part carries and the respective functional part pivots around the assembly lever.
  • 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.
  • the locking mechanism is formed at least by a locking cam and a toothed ring which is rotatable with respect to the locking cam.
  • the locking cam can engage with the toothing of the ring gear from the outside in a form-fitting manner.
  • the pivot joint can be adjusted from the previously described setting position into a reset position.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the characteristic noise is a more or less rattling noise
  • this is perceived by the user of the furniture as being of inferior quality
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • at least one locking cam is assigned to each toothed ring. A compact design with good functionality can then be achieved.
  • the locking mechanism is disengaged 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • NLGI class National Lubricating Grease Institute
  • the grease is very soft, so that the movement of the locking cam is only slightly hindered.
  • the noise insulation is then also comparatively low.
  • the grease is almost solid, which is advantageous for noise insulation, but can be problematic for freedom of movement.
  • the consistency has a value of 2 or 3.
  • the grease can then be referred to as either soft or pliable.
  • the lubricating grease has a lubricating oil content of less than 80%, in particular less than 75%, in particular less than 70%. , having.
  • 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.
  • 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.
  • the test temperature in classes C and E is 40 ° C and in classes G and K 90 ° C.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • a lubricating grease 16 is applied at least essentially completely along the toothing 11 of the ring gear 6.
  • 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.
  • 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.
  • 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.
  • the toothing 10 comprises, for example, seven teeth.
  • a lubricating grease 16 is provided between the locking cam 7 and the guide 8 for guiding the locking cam 7.
  • 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.
  • the guide 8 of the Locking cam 7 is neither on the in the Fig.
  • 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.

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  • Pivots And Pivotal Connections (AREA)
EP21154753.4A 2020-02-14 2021-02-02 Articulation à pivot destinée au réglage amortis d'une partie fonctionnelle Pending EP3865009A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020103940.9A DE102020103940A1 (de) 2020-02-14 2020-02-14 Schwenkgelenk zum gedämpften Verstellen eines Funktionsteils

Publications (1)

Publication Number Publication Date
EP3865009A1 true EP3865009A1 (fr) 2021-08-18

Family

ID=74505089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21154753.4A Pending EP3865009A1 (fr) 2020-02-14 2021-02-02 Articulation à pivot destinée au réglage amortis d'une partie fonctionnelle

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EP (1) EP3865009A1 (fr)
DE (1) DE102020103940A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220248857A1 (en) * 2019-07-16 2022-08-11 Hettich Franke Gmbh & Co. Kg Piece of furniture and method for assembling a piece of furniture

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20112976U1 (de) * 2001-08-13 2001-10-18 Franke Gmbh & Co Kg Schwenkbeschlag

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8172326B2 (en) 2008-03-14 2012-05-08 Lear Corporation Pivot joint assembly for a vehicle seat
DE102017110523A1 (de) 2017-05-15 2018-11-15 Ferdinand Lusch Gmbh & Co. Kg Schwenkgelenk zum Verstellen eines Funktionsteils eines Möbels und Sitzmöbel mit einem Schwenkgelenk
DE102017110524A1 (de) 2017-05-15 2018-11-15 Ferdinand Lusch Gmbh & Co. Kg Schwenkgelenk zum Verstellen eines Funktionsteils eines Möbels und Sitzmöbel mit einem Schwenkbeschlag
DE102018111394A1 (de) 2018-05-14 2019-11-14 Ferdinand Lusch Gmbh & Co Kg Schwenkgelenk zum Verstellen eines Funktionsteils eines Möbels
DE102018111395A1 (de) 2018-05-14 2019-11-14 Ferdinand Lusch Gmbh & Co. Kg Schwenkgelenk mit definiertem Druckpunkt

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20112976U1 (de) * 2001-08-13 2001-10-18 Franke Gmbh & Co Kg Schwenkbeschlag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220248857A1 (en) * 2019-07-16 2022-08-11 Hettich Franke Gmbh & Co. Kg Piece of furniture and method for assembling a piece of furniture
US11800934B2 (en) * 2019-07-16 2023-10-31 Hettich Franke Gmbh & Co. Kg Piece of furniture and method for assembling a piece of furniture

Also Published As

Publication number Publication date
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