EP3019047B1 - Mécanisme pour chaise de bureau - Google Patents

Mécanisme pour chaise de bureau Download PDF

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Publication number
EP3019047B1
EP3019047B1 EP14742463.4A EP14742463A EP3019047B1 EP 3019047 B1 EP3019047 B1 EP 3019047B1 EP 14742463 A EP14742463 A EP 14742463A EP 3019047 B1 EP3019047 B1 EP 3019047B1
Authority
EP
European Patent Office
Prior art keywords
support
seat
backrest
base
damping element
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.)
Active
Application number
EP14742463.4A
Other languages
German (de)
English (en)
Other versions
EP3019047A1 (fr
Inventor
Martin Ballendat
Hermann Bock
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.)
Bock 1 GmbH and Co KG
Original Assignee
Bock 1 GmbH and Co KG
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Publication date
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Publication of EP3019047A1 publication Critical patent/EP3019047A1/fr
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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
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • 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
    • A47C7/002—Chair or stool bases
    • A47C7/004—Chair or stool bases for chairs or stools with central column, e.g. office chairs
    • 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
    • A47C7/40—Support for the head or the back for the back
    • 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
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/448—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with resilient blocks

Definitions

  • the invention relates to a mechanism for an office chair.
  • Seat support and backrest support are usually coupled so articulated that a pivoting movement of the backrest to the rear - as can be caused for example by leaning of the chair user to the backrest - induces a lowering movement of the rear edge of the seat down. This is to prevent the so-called "shirt pull-out effect" and increase the seating comfort.
  • Such synchronous mechanisms are often constructed very expensive and therefore expensive to manufacture.
  • rocking mechanisms are comparatively simple assemblies in the seat substructure of chairs, in which the backrest support is rigidly connected to the seat support, the seat or the frame of the chair.
  • the resulting seat carrier backrest support combination is pivoted by means of the tilt mechanism to a transverse to the chair longitudinal direction pivot axis to the rear, when the user of the chair leans against the backrest.
  • Such rocking mechanisms are often used instead of synchronous mechanisms in inexpensive visitor or conference chairs to realize there a simple Wippfunktion. Because of their relatively simple structure, rocking mechanisms are usually much cheaper to manufacture than the synchronizing mechanisms described above.
  • EP 0 022 933 A1 and US 3,989,297 are chairs with tilt-adjustable seat and reclining backrest known in which the backrest support and the seat support are pivotally mounted about a common pivot axis to a base support.
  • An object of the invention is to provide an office chair, which has a structurally particularly simple design and therefore comparatively inexpensive, yet extremely variable mechanics.
  • a core idea of the invention is to provide a common pivot axis for the coupling of seat support and backrest support of the office chair.
  • This common pivot axis is the only pivot axis, the seat support and backrest support have in common, ie there is no other pivot axis, the seat support and backrest support connects.
  • this pivot axis is the only pivot axis of the seat support and at the same time the only pivot axis of the backrest support.
  • the common swivel axis is at all about the only pivot axis of this mechanism, in particular the single swivel axis, which allows pivoting of mechanical components, such as the seat support or the backrest support, forwardly and / or rearwardly in the chair longitudinal direction.
  • the entire mechanism has only one such, namely the common pivot axis.
  • the seat support and the backrest support are, preferably exclusively, with the aid of one or more common pivot pin, thereby forming the above-described, preferably single common pivot axis, connected to the base support.
  • This means that the at least one common pivot pin rotatably supports both the seat support and the backrest support.
  • this common pivot axis of the seat support by means of at least one pivot pin hingedly connected to the base support and pivotable relative to the base support.
  • the seat support is connected exclusively with the aid of this at least one pivot pin with the base support and with the backrest support and pivotable relative to the base support and relative to the backrest support, and this regardless of a pivoting or by an application of the backrest support.
  • the backrest support is additionally connected in an articulated manner to the base support with the aid of the at least one pivot pin and pivoted relative to the base support while forming this common pivot axis.
  • the backrest support is pivotally connected exclusively with the aid of this at least one pivot pin with the base support and also with the seat support and pivotable relative to the base support and relative to the seat support, and this regardless of a pivoting or by an actuation of the seat support.
  • the one or more pivot pins used always fulfill a dual function. They serve on the one hand for pivotal mounting of the seat support on the base support and on the other hand for pivotal mounting of the backrest support on the base support. As a result, the pivot pin also serves to connect the backrest support and seat support.
  • the pivot pin is preferably rigidly connected to the base support and therefore may be considered part of the base support. A particularly simple structural design is achieved when only a single pivot pin is used, for example, starting from the center of the Base carrier extends transversely to the chair longitudinal direction on both sides to the outside.
  • the invention provides a particularly variable office chair mechanism, in particular rocker or swivel mechanism, which allows an individual pivoting of the backrest that is independent of the degree of pivoting of the seat surface.
  • a particularly variable office chair mechanism in particular rocker or swivel mechanism, which allows an individual pivoting of the backrest that is independent of the degree of pivoting of the seat surface.
  • the simple structure of the mechanism described so far the particularly simple use of other components with which the movement characteristics of the mechanism is variably variable.
  • different mechanisms can be produced with significantly different swing characteristics.
  • the pivoting properties of the individual components are adjustable by means of elastic damping elements. Depending on whether the elasticity of these damping elements is selected to be the same or different from each other, different pivoting characteristics, in particular different pivoting resistances and restoring forces for seat support and backrest support, can be set. At the same time allows the different positioning of the damping elements within the mechanism, more precisely, the different positioning of the damping elements between the mechanical components and thus the choice of which of these mechanical components as acting element and which serves as abutment, the setting of various movement characteristics.
  • the mechanism according to the invention can, for example, the movement characteristics of a Recreate synchronous mechanism, without the need for a complex mechanical design would be necessary.
  • the mechanism has at least a first elastic damping element, which is acted upon in a pivoting of the seat support.
  • this first elastic damping element is acted upon by the seat support in the event of a pivoting of the seat support forward and / or rearward in the chair longitudinal direction.
  • the seat carrier mounted on the central pivot axis can thus be pivoted backwards or forwards, for example, in the case of a weight shift of the user against the resistance of the first elastic damping element.
  • the base support forms the abutment for the at least one first elastic damping element acted upon by the seat support
  • the damping or the return of a pivoting movement of the Seat support relative to the base support as well as the pivoting range of the seat support individually and - depending on the further structural design of the mechanism - regardless of an action on the backrest support or depending on such action on the backrest support, ie by a pivoting of the backrest can be adjusted.
  • the mechanism has at least a second elastic damping element, which is acted upon in a pivoting of the backrest support.
  • this second elastic damping element is acted upon by the backrest support in the event of a pivoting of the backrest support in the chair longitudinal direction.
  • this second elastic damping element now determines whether it is a mechanism in which the seat support and backrest support are in a close coupled relationship to each other, in which a movement of the one component causes a follow-up movement of the other component, or if seat support and backrest support more or less completely decoupled from each other, so that there are two independent pivoting movements.
  • the at least one second elastic damping element between the backrest support on the one hand and the seat support on the other hand arranged.
  • the seat support forms the abutment for the acted upon by the backrest support at least a second elastic damping element.
  • a pivoting of the seat support as preferably occurs against the at least one first elastic damping element results in a subsequent movement of the backrest support, ie the backrest support follows the pivotal movement of the seat support, without this being an act of loading the at least one second elastic Damping element required by the backrest support and the seat support.
  • such a coupled variant moreover results in a pivoting of the backrest support, as preferably takes place against the at least one second elastic damping element in a subsequent movement of the seat support, in particular in a subsequent movement of the seat support against the at least one first elastic damping element.
  • the seat support follows the pivotal movement of the backrest support.
  • the seat support is taken over the second elastic damping element, since seat support and backrest support are in operative connection with each other via this damping element.
  • the at least one second elastic damping element between the backrest support on the one hand and the base support on the other hand is arranged.
  • the base support forms the abutment for the acted upon by the backrest support at least a second elastic damping element.
  • the first elastic damping element has a different elasticity from the elasticity of the second elastic damping element.
  • Different can be specified by a suitable choice of the damping elements, in particular by a suitable choice of material, the elasticity of these damping elements.
  • the pivoting properties of the seat support and the backrest support are defined adjustable, on the one hand in each case for the relevant mechanical component itself, as well as on the other matched, for example, to provide a movement characteristic that is modeled on a synchronous mechanism.
  • the backrest support performs at least the same pivoting angle as the seat support.
  • the hardness of the damping elements can be set adjusted to one another such that at a weight shift of the user to the rear of the pivot angle of the backrest support is greater than the pivot angle of the seat support.
  • an additional deflection angle of the backrest support is added, so that there is a felt synchronous effect.
  • the common single pivot axis can be realized with particularly simple means, in particular with a by a linear displacement movement of a locking element, a multi-stage locking the pivoting movements of seat support and / or backrest support.
  • a locking element preferably have base support, seat support and backrest support mutually aligned openings for receiving the locking element.
  • the support structure according to the invention for a seat and a backrest of an office swivel chair has a sleeve-shaped seat base, a hollow cylindrical back base, a pivot pin and an elastic damping element.
  • the seat base has an end face for attachment of the seat surface and an inner circumferential surface.
  • the back base is arranged coaxially with the seat base.
  • a backrest adapter for attaching the backrest is formed on the back base.
  • the pivot pin has a longitudinal axis extending in the radial direction of the seat base and is mounted in a bearing block of the seat base and in bearing sleeves formed in the lateral surface of the back base.
  • the elastic damping element is arranged between the end face of the seat base and the end face of the back base at least in the region which faces the backrest adapter in the radial direction.
  • the seat base and the back base - and thus the connectable with these seat and backrest - are pivotable relative to each other.
  • the elastic damping element is used for damping or the provision of this pivotal movement in the basic position. Overall, an individual, independent of the degree of pivoting of the seat pivoting the backrest is possible.
  • the elastic damping element may be formed as an annular element and be formed entirely in the region between the end face of the seat base and the end face of the back base. However, it is sufficient that the damping element is formed in the region between the end face of the seat base and the end face of the back base, which faces the backrest adapter in the radial direction. Compared to the training as a full ring is on this way a material savings possible. As particularly advantageous, the formation of the elastic damping element has been found to be a semi-circular ring segment.
  • the support structure further comprises a coaxial with the seat base arranged hollow cylindrical gas spring base for receiving a gas spring.
  • the gas spring base is mounted here with the interposition of an elastic ring element on the inner circumferential surface of the seat base.
  • the elastic ring member is the seat base - and thus the seat - mounted elastically relative to the gas spring base. It can thus be done pivoting / rocking the seat relative to the chair column. In other words, you get an office swivel chair that has both a swivel backrest and a swivel seat. The pivoting movement of the backrest and the seat are independent of each other.
  • the intensity of the pivoting movement or the pivoting range of the backrest and / or the seat can be adjusted.
  • the adjustment of the elasticity can be done for example by selecting suitable materials for the elastic damping element and the elastic ring member.
  • the pivot pin is additionally formed in the lateral surface of the gas spring base bearing bushes stored.
  • the pivot pin serves for the pivotable mounting of both the seat base relative to the back base and the gas spring base relative to the seat base.
  • the pivot pin thus fulfills a dual function.
  • the bearing bushes of the gas spring base in which the pivot pin is mounted equipped with rubber rings.
  • the pivot pin stored with the interposition of the rubber rings in the bushings of the gas spring base. Due to the elasticity properties of the rubber rings, an elastic (yielding) bearing of the pivot pin is given. In this way, no additional side tilt of the seat can be achieved.
  • a gas springindunverstellring is attached to the pivot pin.
  • the pivot pin serves in this way at the same time the height adjustment of the seat. The functionality of the pivot pin is thus further increased.
  • the support structure further comprises a between the seat base and the back base arranged in the circumferential direction of the seat base rotatable back-locking element for locking and unlocking the pivotal movement of the seat base relative to the back base.
  • the office swivel chair according to the invention comprises a pedestal with a serving as a chair column gas spring, one of the supporting structures described above, a seat base connected to the seat base and connected to the rigorouslehenadapter backrest.
  • Fig. 1 shows an office swivel chair 1 with a seat 2 and a backrest 3.
  • the seat 2 and the backrest 3 are connected to each other via a support structure 4. More specifically, the seat 2 is fixed to a seat base 6 of the support structure 4.
  • the backrest 3 is connected via a backrest adapter 7 with a back base 8.
  • the support structure 4 serves to receive an upper end portion of a (in Fig. 1 only shortened shown) Gas spring 5.
  • the gas spring 5 forms the so-called chair column.
  • Fig. 1 not shown is the lower portion of the chair column and the base of the office swivel chair. 1
  • Fig. 2 to Fig. 6 show details of the support structure 4.
  • the seat base 6 is formed substantially sleeve-shaped. At the end face 9 of the seat base 6, the seat 2 is attached. Coaxially to the seat base 6, the back base 8 is arranged.
  • the back base 8 is formed substantially hollow cylindrical, wherein the outer diameter of the lateral surface widens from bottom to top.
  • a bearing pin 10 extends in the radial direction and is in a bearing block 11 of the seat base 6 and in bearing bushes 12 of Back base 8 stored. At the same time, the bearing pin 10 is mounted in bearing bushes 13 of a gas spring base 14.
  • the gas spring base 14 is disposed within the seat base 6 and aligned coaxially therewith.
  • the gas spring base 14 is substantially hollow cylindrical and receives the upper end portion of the gas spring 5.
  • an elastic ring member 16 is arranged between the outer circumferential surface of the gas spring base 14 and the inner circumferential surface 15 of the seat base 6, between a shoulder 17 on the inner circumferential surface 15 of the seat base 6 and a front side formed on the gas spring base 14 flange 18.
  • a gas spring height adjustment ring 19 is mounted on the bearing pin 10 within the gas spring base 14.
  • the elastic damping element 20 is formed as a semicircular ring segment and is arranged in the region between the end face of the seat base 6 and the end face of the back base 8, which faces the backrest adapter 7 in the radial direction.
  • the elastic ring element 16 has a lower elasticity than the elastic damping element 20.
  • a back-locking element 21 is arranged coaxial with the seat base 6 and serves for Locking and unlocking of the pivoting movement of the seat base 6 relative to the back base 8 about the pivot pin 10th
  • Fig. 4 shows the support structure 4 in the upright basic position while Fig. 5 the support structure 4 is in a pivoted to the rear pivot position. In the pivoting position, the elastic damping element 20 and the elastic ring element 16 are compressed on the area opposite the backrest adapter 7 in the radial direction.
  • the seat base 6 Due to the different elasticities of the elastic damping element 20 and the elastic ring member 16 and the different compared to the pivot pin 10 formed lever arms, the seat base 6 is less strongly deflected from the home position than the back base 8. It is thus an independent pivoting of the seat base 6 and the back base. 8 possible.
  • Fig. 7 shows another embodiment of a support structure 104.
  • the support structure 104 differs from the support structure described above only in the formation of the gas spring base. The remaining components remain unchanged.
  • the gas spring base 114 used in the supporting structure 104 substantially corresponds in construction to the gas spring base 14 and differs from the gas spring base 14 by additionally provided rubber rings 22. These rubber rings 22 are inserted in the bearing bushes 13 of the gas spring base 114.
  • the pivot pin 10 thus superimposed with the interposition of the rubber rings 22 in the bearing bushes 13 of the gas spring base 114. Due to the elasticity properties of the rubber rings 22 is an elastic support of the pivot pin 10 within the gas spring base 114 given. This in turn leads - with a corresponding weight or positional displacement of the user - to a lateral inclination of the seat 2.
  • the invention is thus directed to a support structure 4, 104 for a seat 2 and a backrest 3 of an office swivel chair 1, comprising: a sleeve-shaped seat base 6 with an end face 9 for fixing the seat 2 and an inner surface 15; a hollow cylindrical back base 8 which is arranged coaxially with the seat base 6 and on which a backrest adapter 7 for fixing the backrest 3 is formed; a pivot pin 10, which has a longitudinal axis extending in the radial direction of the seat base 6 and which is mounted in a bearing block 11 of the seat base 6 and formed in the lateral surface of the back base 8 bearing bushes 12; and an elastic damping element 20, which between the end face of the seat base 6 and the end face of the Back base 8 is arranged at least in the region opposite to the backrest adapter 7 in the radial direction.
  • the invention is further directed to such a support structure, wherein the elastic damping element 20 is formed as a semi-circular ring segment.
  • the invention is further directed to such a support structure, further comprising a coaxial with the seat base 6 arranged hollow cylindrical gas spring base 14, 114 for receiving a gas spring 5, wherein the gas spring base 14, 114 is mounted with the interposition of an elastic ring member 16 on the inner circumferential surface 15 of the seat base 6 ,
  • the invention is further directed to such a support structure, wherein the elastic ring member 16 is mounted in the axial direction between a shoulder 17 of the inner circumferential surface 15 of the seat base 6 and a flange 18 formed on the end face of the gas spring base 14, 114.
  • the invention is further directed to such a support structure, wherein the elastic ring member 16 has a lower elasticity than the elastic damping element 20.
  • the invention is further directed to such a support structure, wherein the pivot pin 10 is additionally mounted in formed in the circumferential surface of the gas spring base 14, 114 bearing bushes 13.
  • the invention is further directed to such a support structure, wherein in the bearing bushes 13 of the gas spring base rubber rings 22 are introduced, in which the pivot pin 10 is mounted.
  • the invention is further directed to such a support structure according to any one of the preceding claims, wherein on the pivot pin 10, a gas springindunverstellring 19 is mounted.
  • the invention is further directed to such a support structure according to any one of the preceding claims, further comprising a seat base 6 and the back base 8, in the circumferential direction of the seat base 6 rotatable back-locking element 21 for locking and unlocking the pivotal movement of the seat base 6 relative to the back base 8 about the pivot pin 10.
  • the invention is also directed to an office swivel chair 1, comprising: a pedestal with serving as a chair column Gas spring 5; a support structure 4, 104 according to any one of the preceding claims; a seat 2 connected to the seat base 6; and a backrest 3 connected to the backrest adapter 7.
  • the pivoting mechanism has a base support 14, which is set by means of a cone seat on the upper end of a chair column (not shown).
  • the mechanism comprises a seat support 6 and a fork-shaped in plan view backrest support 8, the cheeks 23 are arranged on both sides of the base support 14.
  • the seat support 6 is provided for receiving or mounting a padded seat (not shown).
  • the backrest 3 may also be integrally connected to the backrest support 8.
  • the backrest support 8 occupies a substantially horizontal position and also the seat support 6 is pivoted neither in the chair longitudinal direction 24 forward or backward.
  • the mechanism 4A is comparatively compact in that the central base support 14 is gripped at least laterally both by the seat support 6 and by the cheeks 23 of the backrest support 8.
  • the seat support 6 by means of a single continuous pivot pin 10 is pivotally connected to the base support 14 and pivotable relative to the base support 14 in the chair longitudinal direction 24 forward and backward and on the other hand, the backrest support 8 with Help this pivot pin 10 pivotally connected to the base support 14 and pivotable relative to the base support 14 from its non-pivoted ground state into a pivot state in which it is pivoted backwards down.
  • the pivot pin 10 is mounted in bearing bushes 26 or the like, see Fig.
  • corresponding bearing 26 may also be provided in an upwardly extended cone seat or in a gas spring base.
  • the common pivot axis 25 extends centrally over the cone seat, so that the horizontal pivot axis 25 and the vertical central longitudinal axis 29 of the chair column intersect, see Fig. 8 and 13 ,
  • a front first elastic damping element 16a is provided, which is acted upon by the seat support 6 in the event of a forward pivoting of the seat support 6 in the chair longitudinal direction 24.
  • a rear first elastic damping element 16b is provided, which is acted upon by a pivoting of the seat support 6 to the rear in chair longitudinal direction 24 from the seat support 6.
  • Both the front first elastic damping element 16 a and the rear first elastic damping element 16 b are arranged between the base support 14 and the seat support 6.
  • the base support 14 thus forms the abutment for both damping elements 16a, 16b.
  • the backrest support 8 is connected exclusively to the seat support 6 via the pivot pin 10 and via a central second damping element 20 arranged behind the cone seat.
  • This second elastic damping element 20 is acted upon at a taking place in chair longitudinal direction 24 pivoting of the backrest support 8 to the rear bottom of the backrest support 8.
  • the second damping element 20 between the backrest support 8 on the one hand and the seat support 6 on the other hand arranged, so that the seat support. 6 forms the abutment for acted upon by the backrest support 8 second elastic damping element 20.
  • Fig. 13 a further cross-section through the mechanism 4A is shown, from which it is apparent how easily by means of a linear displacement movement of a locking element 30, a multi-stage locking the pivoting movements of seat support 6 and / or backrest support 8 can be realized.
  • the rod-shaped blocking element 30 can optionally be placed in one or more mutually aligned openings 31, 32, 33, which are provided for receiving the locking element 30 in the base support 14, the seat support 6 and the backrest support 8.
  • the in Fig. 13 illustrated first locking step in which the locking element 30 rests only in the outer receiving opening 31 of the backrest support 8, the lock is released.
  • the blocking element 30 is pushed further in the direction of cone reception in the mechanism 4A, so that it rests in the next receiving opening 32 of the seat support 6, the second locking stage is reached, in which the movement of the seat support 6 is locked relative to the backrest support 8.
  • the seat carrier / backrest support combination 6, 8 can only be tilted as a common pivot unit, whereby the pivot principle of a rocking mechanism is realized.
  • the final one third locking step which is achieved when the blocking element 30 is inserted into the next following receiving opening 33 of the base support 14 and rests in this, in addition to the blocking effect of the second locking step, a pivoting of the seat support / backrest support combination 6, 8 relative to locked to the base support 14; this corresponds to a locked rocking mechanism.
  • the multi-stage lock as in Fig. 13 can also be used in the "B", "C” and “D” type mechanisms described below.
  • the second elastic damping element 20 is arranged here between the backrest support 8 on the one hand and the base support 14 on the other hand.
  • the base support 14 forms the abutment for the acted upon by the backrest support 8 in a pivoting movement second elastic damping element 20th
  • the cut mechanism 4B is shown from the front and from behind, so that the arrangement of the damping elements 16, 20 is particularly clear.
  • the outer side walls 28 of the seat support 6 surround the inner central Backrest support member 34 of the cheekless backrest support 8 in this case between this backrest support 8 on the one hand and a base plate 35 of the base support 14 on the other hand is the second damping element 20, see Fig. 15 .
  • first damping elements 16 are provided, which extends continuously over the entire length of the base support 14 from front to back extend. Both the first damping elements 16 and the second damping element 20 are thus on the same as an abutment serving construction element, the base plate 35 of the base support 14, on.
  • the non-reversed ground state is again in Fig. 16 shown.
  • Fig. 17 shows that when pivoting the seat support 6 seen in chair longitudinal direction 24 forward the front end 37 of the first damping elements 16 is acted upon by the seat support 6, while the seat support 6 of the rear end 38 of the first damping elements 16, see Fig. 14 , takes off. Since it lacks a coupling to the second damping element 20, the pivoting of the seat support 6 remains forward without affecting the backrest support 8. The same applies accordingly for a pivoting of the seat support 6 in the chair longitudinal direction 24 to the rear, as in Fig. 18 displayed.
  • the backrest support 8 moves only when the backrest 3 is loaded, that is to say when the user leans against the backrest 3, see FIG Fig. 19 ,
  • the second damping element 20 is acted upon by the backrest support 8 and also provides a corresponding Restoring force available, which - as in all other described embodiments - causes a pivoting back of the backrest 3 with the backrest support 8 in the ground state when the backrest 3 is no longer burdened by the user.
  • Fig. 21 to 23 is a mechanism of the type "C” shown. It is their function, as the “Type A” -Mechanik to a coupled mechanism 4C, in which the abutment for the second damping element 20 is formed by the seat support 6.
  • the type "C” mechanism differs from the “Type A” mechanism in the shape and arrangement of the damping elements 16, 20.
  • the center of the base support 14 with the conical seat is flanked on both sides first by side walls 28 of the seat support 6, then flanked to the outside by the cheeks 23 of the backrest support 8.
  • the special feature is that the damping elements 16, 20 are arranged in the interior of the side walls 28 and cheeks 23. As a result, the space required for the mechanism 4C is significantly reduced and it results in an overall much more compact mechanism 4C, which is particularly flat.
  • the damping elements 16, 20 are formed in this case as a ring arc segment-shaped blocks, extending over a defined angle section, the Partially encompass pivot pin 10.
  • the damping elements 16, 20 lie in suitable receiving spaces within the side walls 28 and cheeks 23 a.
  • FIG. 21 the mechanism 4C with the damping elements 16, 20 receiving side walls 28 and cheeks 23 from the outside, illustrates the in Fig. 22 illustrated section through a side wall 28 of the seat support 6 shape and arrangement of a front first damping element 16a and a rear first damping element 16b.
  • a front first damping element 16a and a rear first damping element 16b two different materials for the front and rear first damping element 16a, 16b were used to illustrate that in this way for pivoting the seat support 6 in chair longitudinal direction 24 forward another pivoting resistance can be set, as for a pivoting of the seat support 6 in chair longitudinal direction 24 to the rear.
  • the first two damping elements 16a, 16b are separated from each other twice. On the one hand lie in the non-pivoted ground state of the seat support 6, the damping elements 16a, 16b with one end to a driver 39 of the seat support 6, which is a kind of projection of the outer wall of the receiving space 40 radially in the direction of the pivot pin 10th extends and both in the chair longitudinal direction 24 to front and back corresponding stop surfaces 41, 42 for acting on the damping elements 16a, 16b form.
  • the damping elements 16a, 16b With their opposite other ends on serving as an abutment 43, stationary part of the base support 14, starting from the center of the base support 14, extending transversely to the chair longitudinal direction 24, in the receiving space 40 of protrudes first damping elements 16a, 16b.
  • the abutment 43 is integrally fixedly connected to the pivot pin 10 and corresponds in shape to the driver 39 of the seat support 6, wherein the Pivot 10 in turn is firmly connected to the base support 14.
  • the front and rear first damping elements 16a, 16b and provided for them receiving spaces 40 are the same size.
  • driver 39 and abutment 43 are exactly opposite, wherein the driver 39 in the non-pivoted ground state of the seat support 6 from the pivot pin 10 viewed from down and the abutment 43 facing upward.
  • the driver 39 So in the ground state is in a 6 o'clock position, while the abutment 43 is placed in a 12 o'clock position.
  • both the size of the damping elements 16a, 16b and the position of the driver 39 and / or the abutment 43 can be varied in order to realize certain pivoting characteristics.
  • Fig. 23 illustrated section through a cheek 23 of the backrest support 8 illustrates the shape and arrangement of a second damping element 20 of this mechanism 4C.
  • a second catch 44 of the seat support 6 extends transversely to the chair longitudinal direction 24 into the interior of the cheek 23 of the backrest support 8 formed receiving space 45 of the second damping element 20 into it and forms the abutment for the second damping element 20 at a loading of the second damping element 20 by the backrest support 8.
  • the driver 46 of the backrest support 8 which is arranged in the basic position approximately in a 11 o'clock position, in turn extends as a kind of projection of the outer wall of the receiving space 45 radially in the direction of the pivot pin 10. He also forms both in the chair longitudinal direction 24 before as well as to the rear corresponding stop surfaces for acting on the two second damping elements 20a, 20b.
  • the "front” second damping element 20a which rests in the ground state of the backrest support 8 to the front longitudinally facing the stop surface 24 of the driver 46 of the backrest support 8, is acted upon by a pivoting of the seat support 6 to the rear of the abutment 44 formed by the seat support 6 and causes as a subsequent movement pivoting of the backrest support 8 in the same direction, to the rear.
  • the "rear” second damping element 20b is acted upon by the abutment 44 formed by the seat support 6, which causes the backrest support 8 to pivot in the same direction, that is to say forward, as a following movement.
  • Fig. 24 to 27 is a mechanism of the type "D" shown. This is their function, as the "Type B” -Mechanik to a decoupled mechanism 4D, in which the abutment for the second damping element 20 is not of the seat support 6, but is formed by the base support 14. As with the "C” type of mechanics, however, the damping elements 16, 20 are again arranged around the pivot pin.
  • Fig. 24 the mechanism 4D with the damping elements 16, 20 receiving side walls 28 and cheeks 23 from the outside, illustrates the in Fig. 25 illustrated section through a side wall 28 of the seat support 6 shape and arrangement of a front first damping element 16a and a rear first damping element 16b.
  • This structure corresponds essentially to the construction of a "Type C" mechanism, as in Fig. 22 shown.
  • Fig. 26 shows a section through a cheek 23 of the backrest support 8.
  • the abutment 47 for the two second damping elements 20a, 20b which are acted upon in pivoting movements of the backrest 3 of the driver 46 of the backrest support 8 in a known manner.
  • the abutment 47 is designed as a chair longitudinal direction 24 forward and rearward facing shaping of the pivot pin 10, which forms in the ground state horizontal, upwardly facing abutment surfaces 49 for the second damping elements 20a, 20b.
  • the pivot pin 10 with its contact surfaces 49 is, as in the above-described mechanism "C", fixedly connected to the base support 14 and therefore can constructively, in each Case but functionally be regarded as part of the base 14.
  • the driver 46 is arranged in the basic state of the backrest support 8 approximately in a 1 o'clock position.
  • the driver 46 moves, for example in the 12 o'clock position, as in Fig. 26 imaged, and thus acts on the "rear” second damping element 20 b, which abuts with its opposite end on the rear abutment surface 49 of the abutment 47.
  • the "rear” second damping element 20b turn the swing resistance of the backrest 3 is defined.
  • the shorter "front” second damping element 20a is used for damping a pivoting movement of the backrest 3 forward.
  • the pivot axis 25 and the vertical central longitudinal axis 29 of the chair column 5 intersect in the center of the base support 14, can, as already in connection with the in the Fig. 1 to 7 described embodiments, also in the mechanics of the type "A" to "D", the pivot axis 25, more precisely, the pivot pin 10, as a support for a Gasfederauslöseelement, for example in the form of a gas springménverstellrings 19 serve.
  • Thiscorenverstellring 19 is for example eccentric and designed to mount a Bowden cable (not shown) or other traction means, so that when pulling the Bowden cable at the upper end of the gas spring 5 mounted Gasfederpin depressed and thus the gas spring 5 is actuated.
  • the common pivot axis 25 does not necessarily have to be the only pivot axis of the entire mechanism 4. It is also possible that the mechanism 4 has further pivot axes, as long as at least the common pivot axis 25 is the only pivot axis, the seat support 6 and backrest support 8 connect with each other. Also, the concept of arranged between individual components of the mechanism 4 damping elements 16, 20 different elasticity can be transferred to such office chair mechanisms having more than one pivot axis.

Claims (6)

  1. Mécanisme (4) pour une chaise de bureau (1), avec un support de base (14) pouvant être placé sur une colonne de chaise (5), un support de siège (6) et un support de dossier (8), dans lequel avec formation d'un axe de pivotement commun (25)
    aussi bien le support de siège (6) est assemblé de façon articulée au support de base (14) à l'aide d'au moins un boulon de pivotement (10) et peut pivoter par rapport au support de base (14)
    que le support de dossier (8) est assemblé de façon articulée au support de base (14) à l'aide dudit au moins un boulon de pivotement (10) et peut pivoter par rapport au support de base (14),
    dans lequel l'axe de pivotement (25) est le seul axe de pivotement commun du support de siège (6) et du support de dossier (8),
    avec des éléments d'amortissement élastiques (16, 20) positionnés entre les composants du mécanisme (6, 8, 14),
    avec au moins un premier élément d'amortissement élastique (16) sollicité lors d'un pivotement du support de siège (6), qui est disposé entre le support de base (14) et le support de siège (6) et au moins un deuxième élément d'amortissement élastique (20) sollicité lors d'un pivotement du support de dossier (8), qui est disposé soit entre le support de dossier (8) et le support de siège (6) soit entre le support de dossier (8) et le support de base (14),
    caractérisé en ce que les éléments d'amortissement (16, 20) sont des blocs parallélépipédiques, annulaires ou en forme de segments d'anneau, dont l'élasticité peut être prédéfinie par un choix de matériau approprié.
  2. Mécanisme (4) selon la revendication 1, dans lequel l'axe de pivotement (25) est le seul axe de pivotement du mécanisme (4).
  3. Mécanisme (4) selon la revendication 1 ou 2, dans lequel le premier élément d'amortissement élastique (16) présente une élasticité différente de l'élasticité du deuxième élément d'amortissement élastique (20).
  4. Mécanisme (4) selon l'une quelconque des revendications 1 à 3, avec un blocage dans plusieurs positions des mouvements de pivotement du support de siège (6) et/ou du support de dossier (8) au moyen d'un élément d'arrêt (30) déplaçable linéairement.
  5. Mécanisme (4) selon l'une quelconque des revendications 1 à 4, dans lequel un élément de déclenchement de ressort à gaz (19) est disposé sur l'au moins un boulon de pivotement (10).
  6. Chaise de bureau (1), avec une colonne de chaise (5) et avec un mécanisme (4) selon l'une quelconque des revendications 1 à 5 placé sur cette colonne de chaise (5) .
EP14742463.4A 2013-07-07 2014-07-07 Mécanisme pour chaise de bureau Active EP3019047B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202013102990 2013-07-07
PCT/EP2014/001864 WO2015003796A1 (fr) 2013-07-07 2014-07-07 Mécanisme pour chaise de bureau

Publications (2)

Publication Number Publication Date
EP3019047A1 EP3019047A1 (fr) 2016-05-18
EP3019047B1 true EP3019047B1 (fr) 2019-07-03

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US (1) US9839296B2 (fr)
EP (1) EP3019047B1 (fr)
DE (1) DE102014109438A1 (fr)
WO (1) WO2015003796A1 (fr)

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Also Published As

Publication number Publication date
US20160235205A1 (en) 2016-08-18
WO2015003796A1 (fr) 2015-01-15
EP3019047A1 (fr) 2016-05-18
US9839296B2 (en) 2017-12-12
DE102014109438A1 (de) 2015-01-08

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