Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
  • A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
  • A47C31/126—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for chairs
• • 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
  • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
  • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
  • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
• • 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
  • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
  • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
  • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers

Definitions

• the invention relates to a chair, in particular an office chair, with a synchronous mechanism.
• Modern high-quality office chairs are usually equipped with a synchronous mechanism, which ensures that the seat moves synchronously with the backrest.
• the synchronizing mechanism is usually formed by a backrest support, which is arranged on a central support frame, is movably connected to the seat.
• the movements of the backrest carrier are transmitted in synchronous movements of the seat.
• a synchronous mechanism offer different possibilities.
• a floor chair can be removed, the seat surface of which inclines with a deflection of the backrest to the rear towards the backrest.
• DE 42 19 599 C2 an office chair can be removed, the seat surface inclines with a deflection of the backrest to the rear opposite to the front.
• US Pat. No. 6,709,058 B1 discloses an office chair in which the force of the backrest counteracting an inclination mechanically adapts to the weight of a seated person.
• the backrest support is bent over a pivot point on the support frame out up under the seat. By this bend in combination with the fulcrum, a rearward tilting movement of the backrest on the backrest support is converted into an upward movement of the seat. Since the point of contact of the backrest support acting on the seat surface makes a rotational movement, the force which opposes the seated person from the backrest is dependent on the absolute inclination position of the backrest support. It is an object of the invention to provide a chair of the type mentioned, which has an alternative mechanism for automatically adjusting the counteracting of the backrest of a force on the weight of the seated person.
• a chair in particular an office chair, with a hinged to a support frame via a backrest support and a synchronous movable seat, which is connected in a Aufddling about a seat link pivotally connected to the support frame, the backrest support and the Seat link are each rotatably mounted on the support frame, and wherein a pull rod such that the seat link is movably connected to the backrest support, that a rearward tilting movement of the backrest is translated at the Aufddling in an upward pivotal movement of the seat.
• the invention is based in a first step on the consideration that the weight of a seated person is directed vertically downwards. If the tilting or rotary movement of the backrest is coupled directly to the seat surface via a suitably designed backrest support, then only the component which is tangential with respect to the rotational movement in the attachment point acts from the weight force. But this is the counter-force of the backrest acting against the seated person depends on their inclination.
• the invention proceeds from the consideration of overcoming this disadvantage by movably connecting a seat link which directs the seat surface to the backrest support via a pull rod.
• a seat link which directs the seat surface to the backrest support via a pull rod.
• the rotational movement of the backrest and thus of the backrest carrier is transmitted via the pull rod to a rotational movement of the seat handlebar.
• the coupling via the pull rod offers additional mechanical degrees of freedom which allow the inclination of the backrest to be converted into a desired upward movement of the seat surface in a certain range.
• Such mechanical degrees of freedom are the length of the drawbar, the location of the attachment points of the drawbar on the backrest support and the seat link and the position of the backrest support to the seat link.
• the basic principle acting here is based on the fact that, in the case of a coupling of a rotary movement with a movable drawbar, the movement effected per rotation angle parallel to the drawbar is again dependent on the absolute rotational position.
• the described Bene coupling between seat link and backrest support with a pull rod can thus be used to compensate for the described undesirable dependence of the generated per angular difference of the backrest stroke of the seat of the absolute inclination angle of the backrest.
• the backrest support is rotatably mounted on the support frame via a pivot bearing and has a pivot bearing on which the pull rod is rotatably mounted, wherein the pivot bearing in which the pull rod is mounted, in the direction of the seat link before and in the direction of the seat over the Rotary bearing is arranged over which the backrest support is attached.
• This geometry ensures that a rearward tilting movement of the backrest support leads from the beginning to an offset of the drawbar.
• About the coupling of the drawbar to the seat handlebars steering the seat can be achieved in this way a favorable for the automatic weight increase the increase of the seat.
• the backrest support on an angled pivot arm on which the pull rod is rotatably mounted By means of an angled swivel arm, the angle position between the pull rod and the tangent of the rotary motion of the backrest support can be set to save material in the starting or resting state of the chair at the attachment point.
• the seat link is rotatably mounted on the seat. This allows for a rotational movement of the seat link relative to the support frame maintaining the orientation of the seat.
• the seat link is designed as a joint element, in particular as a hinge plate, with a first, a second and a third pivot bearing.
• the seat is connected to the support frame.
• the drawbar is mounted.
• This embodiment is cost-effective and allows a mechanically simple, movable coupling between the seat and the support frame.
• About the distance of the third pivot bearing of the other two pivot bearings caused by each tie rod rotation angle of the joint element can be adjusted. Again, the ratio of the angle of rotation and the tie rod offset depends on the absolute rotational position of the joint element.
• the seat is guided in a spaced from the Auftician further Aufddling by means of a support frame mounted on the support member such that at an upward pivotal movement at the Auftician an overall tilt of the seat is effected to the stipulateleh- ne.
• the increasing forward inclination of the seat back pressure of the seated person is absorbed by the appropriately oriented inclination of the seat. Slipping of the seated person is thus prevented.
• the guidance of the seat by means of the seat guide element in a further Aufddling allows a great deal of freedom in the design of the desired synchronous movement of the seat with respect to the deflection of the backrest.
• the seat link and the seat guide element cooperate in such a way that the point is raised by a tilting movement of the backrest directed backwards and the additional point is pushed back upwards.
• the Auftician raised in a rotational movement and the other Aufyak is pushed by the rotational movement, a slight embodiment of the raising of the seat with a desired inclination curve is possible.
• the seat guide element is designed as a slotted guide.
• the slotted guide allows in addition to the leadership in accordance with the predetermined link shape as a further degree of freedom a rotational movement. In this way, the movement of the seat can be influenced and predetermined within certain limits in a simple manner.
• the slide guide on a curved guide. Due to the curvature, the progression of the increase of the further point of the seat is adjustable. This can be combined with the upward pivoting As a result of the movement of the front surface, the course of movement of the seat as such is predetermined.
• the slotted guide on a linear guide is low feasible.
• a progression of the upward movement of the further point can also be achieved with a linear guide in such a way that the seat surface inclines when the backrest is deflected and, in addition, the more the overall height increases with increasing deflection of the backrest.
• the connecting straight line between the third rotary bearing and the first rotary bearing is connected to the connecting straight line between the third rotary bearing and the rotary bearing in which the pull rod is mounted , includes approximately a right angle and the connecting line between the pivot bearing for mounting the drawbar and the third pivot bearing with the connecting line between the pivot bearing in which the drawbar is mounted, and the pivot bearing in which the backrest support is mounted, an angle of more than 90 °, in particular more than 120 °, includes.
• This arrangement is space-saving and allows a favorable implementation of the tilting movement of the backrest in a desired upward movement of the seat.
• a further stable variant of the synchronization mechanism is arranged in total mirror-symmetrical to both sides of the seat. It is particularly expedient to form the joint elements as flat hinge plates.
• FIG. 1 is a side view schematically an office chair with a weight mechanism in the rest position, wherein the seat is mounted on a seat link on a support frame and Fig. 2 in a side view schematically the office chair of FIG. 1 in the deflected position, and
• FIG 3 is a side view schematically an office chair with a weight mechanism in the rest position, wherein a linear slotted guide is provided.
• Fig. 1 shows a side view schematically an office chair 1, which has a seat 3 and a backrest 5.
• the chair 1 also has a central chair column 7, which - not shown - by a pedestal, especially a bogie with wheels, is worn.
• a central support frame 8 is arranged, on which the seat surface 3 and the backrest 5 are articulated via a seat link 9 or a backrest support 10.
• the backrest support 10 is rotatably attached to the support frame 8 via the rotary support 11.
• the seat 3 is also rotatably mounted in a first pivot bearing 17 on the support frame 8 via the seat link 9 designed as a joint element 13.
• the joint element 13 has, in addition to the first pivot bearing 17, a second pivot bearing 18 and a third pivot bearing 19.
• the seat surface 3 is mounted in a Auftician 15, so that the seat surface 3 can perform a total pivoting movement relative to the support frame 8.
• the joint member 9 engages a tie rod 22, whose other end is connected via the pivot bearing 23 with an angled pivot arm 25 of the back support 10.
• the seat 3 is connected via a slotted guide 30 on the support frame 8.
• FIGS. 1 and 2 The operation of the office chair 1 will be apparent from a comparison of FIGS. 1 and 2. While Fig. 1 - as mentioned - the office chair 1 in the idle state, the office chair 1 is shown in a deflected form in Fig. 2.
• the pivot arm 25 is moved to the top right due to the mounting of the backrest support 10 in the pivot bearing 11. This movement will transmitted via the pull rod 22 to the joint member 13.
• the offset of the pull rod 22 leads due to the mounting of the joint member 13 in the first pivot bearing 17 to an erection of the joint member 13.
• the Auftician 15 of the seat 3 moves in an upward pivotal movement.
• the seat 3 is thus raised overall and simultaneously moved to the right in the illustration shown.
• the other Auf Vietnamese 27 of the seat 3 moves in accordance with the curved slide guide 30 also in a kind of pivoting movement to the top right.
• the curvature of the slotted guide is dimensioned such that, with continuous movement, the seat surface 3 generally inclines towards the backrest 5.
• the pivot arm 25 or the pivot bearing 23 and the further point of reference in accordance with a fictitious hourly division of 12 hours, starting from the rest position of the office chair 1 of the Auf Vietnamese 15 initially at 9 o'clock starting in the direction of an 11 o'clock position in Fig. 2.
• the pull rod 22 engages approximately tangentially with respect to the rotational movement of the joint member 13 in the third pivot bearing 19.
• the angle of the pull rod 22 to the passing through the first pivot bearing 17 and the third pivot bearing 19 radius of rotation is approximately 90 °.
• the pivot arm 25 moves according to the performed tilt of the backrest 5 by about one hour.
• the pull rod 22 is oriented tangentially to the rotary movement of the swivel arm 25.
• Fig. 3 shows in a side view schematically an office chair 1 ', wherein the further Auftician 27 of the seat surface 3 moves in deflection of the backrest support 10 in a linear slotted guide 30' to the right.
• the linear slotted guide 30 ' is designed so that the seating surface 3 tends to the backrest 5 with progressive movement of the backrest and is increasingly raised overall.

Landscapes

• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• General Health & Medical Sciences (AREA)
• Chairs For Special Purposes, Such As Reclining Chairs (AREA)
• Chairs Characterized By Structure (AREA)
• Hydrogenated Pyridines (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=37074964

Family Applications (1)

Country Status (6)

Families Citing this family (22)

Family Cites Families (6)

• 2005
  • 2005-07-27 DE DE202005011725U patent/DE202005011725U1/de not_active Expired - Lifetime
• 2006
  • 2006-07-19 WO PCT/EP2006/007077 patent/WO2007012418A1/fr active Application Filing
  • 2006-07-19 AT AT06762680T patent/ATE458423T1/de active
  • 2006-07-19 AU AU2006274242A patent/AU2006274242A1/en not_active Abandoned
  • 2006-07-19 ES ES06762680T patent/ES2339151T3/es active Active
  • 2006-07-19 DE DE502006006259T patent/DE502006006259D1/de active Active
  • 2006-07-19 EP EP06762680A patent/EP1906792B1/fr active Active

Non-Patent Citations (1)

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