EP0635227A1 - Chaise, notamment chaise de bureau - Google Patents

Chaise, notamment chaise de bureau Download PDF

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Publication number
EP0635227A1
EP0635227A1 EP94110869A EP94110869A EP0635227A1 EP 0635227 A1 EP0635227 A1 EP 0635227A1 EP 94110869 A EP94110869 A EP 94110869A EP 94110869 A EP94110869 A EP 94110869A EP 0635227 A1 EP0635227 A1 EP 0635227A1
Authority
EP
European Patent Office
Prior art keywords
support part
seat support
rear seat
seat
chair
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.)
Granted
Application number
EP94110869A
Other languages
German (de)
English (en)
Other versions
EP0635227B1 (fr
Inventor
Manfred Elzenbeck
Klaus Haar
Harald Nathmann
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.)
Dauphin Entwicklungs und Beteiligungs GmbH
Original Assignee
Trendoffice Bueromoebel & Co KG GmbH
Trendoffice Bueromobel & Co KG GmbH
TRENDOFFICE BUEROMOEBEL
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 Trendoffice Bueromoebel & Co KG GmbH, Trendoffice Bueromobel & Co KG GmbH, TRENDOFFICE BUEROMOEBEL filed Critical Trendoffice Bueromoebel & Co KG GmbH
Publication of EP0635227A1 publication Critical patent/EP0635227A1/fr
Application granted granted Critical
Publication of EP0635227B1 publication Critical patent/EP0635227B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • A47C1/022—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
    • 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
    • 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs

Definitions

  • the invention relates to a chair according to the preamble of claim 1.
  • Such a chair known from DE 27 33 322 C3 (corresponding to US Pat. No. 4,200,332), has a so-called synchronous mechanism in which the backrest and seat are pivoted simultaneously in a certain predetermined ratio.
  • the energy accumulator serves to enable an adjustment or pivoting of the backrest, which is done by the user pressing against the backrest.
  • the rear area of the seat is lowered as well or raised when the backrest is swung forward.
  • a length-adjustable gas spring is provided, which can be celebrated in any length setting. The effort for this is great.
  • the seat and the backrest have a fixed position to each other for each pivot position of the synchronous mechanism. This does not meet the needs of users with different body shapes and different postures when using the chair.
  • the invention has for its object to design a chair of the generic type so that an adaptation to different body shapes and working postures of the user is possible with a simple structure.
  • the measures according to the invention make it possible for the basic inclination of the seat surface to be changed, i.e. the basic setting of the inclination of the seat relative to the backrest can be changed.
  • the position of the front area of the seat is not changed, but the seat is raised or lowered in its rear area.
  • the subclaims give advantageous and partly inventive configurations.
  • the seat inclination adjustment device can be used as a kit for retrofitting the chair and that the chair retains its synchronous mechanism even without this seat inclination adjustment device.
  • FIG. 1 shows an office chair which has a chair frame 1. This is provided with a base frame 2, which is supported by rollers 3 against the floor. On the base 2, a height-adjustable chair column 4 is attached, at the upper end of which a seat support 5 is attached.
  • the seat support 5 is configured in two parts; it has a front seat support part 6, which is fastened on the chair column 4, and a rear seat support part 7, which is articulated above the chair column 4 by means of a pivot axis 8 on the front seat support part 6.
  • a support tube 9 is fastened, which runs parallel to the pivot axis 8.
  • a seat 10 is supported on this support tube 9 shortly behind its front edge 11.
  • the seat 10 is supported in its rear area on a support axis 12 which is mounted in the rear seat support part 7.
  • a seat inclination adjustment device 13 can also be arranged on the rear seat support part 7.
  • a backrest support 14 which projects from this and on which a backrest 15 is attached.
  • a backrest height adjustment device 16 is provided.
  • the described design of the seat support 5 with the arrangement of the seat 10 and the backrest 15 forms a so-called synchronous mechanism.
  • a force changing device 17 is provided in order to be able to change the forces to be overcome when adjusting or rocking.
  • Armrests 18 are attached to the front edge 11 of the seat 10, specifically on the outer ends of the support tube 9, of which only one can be seen in the side view of FIG. 1.
  • Fig. 2 In Fig. 2 below is also indicated that the armrest 18 is provided at its lower end with a short holding sleeve 24 which is attached to the end of the support tube section 20 '.
  • positioning projections (not shown in the drawing) are formed in the holding sleeve 24, which engage in recesses 26 formed at the end of the respective support tube section 20.
  • each support tube section 20, 20 ' an actuating shaft is pivotally mounted about the axis 22, which projects into the open space 23 at one end.
  • An actuating shaft 27 for a chair height adjustment is mounted in the support tube section 20 shown above in FIG. 2, while an actuation shaft 28 for the actuation of a synchronous mechanism is mounted in the support tube section 20 'shown in FIG. 2 below.
  • Each actuating shaft 27, 28 has at least one driving pin 29 running radially to the axis 22, which extends outwards through an elongated hole 30 in the respective support tube section 20 or 20 '.
  • the respective elongated hole 30 extends over a part of the circumference of the respective support tube section 20, 20 ′, the maximum pivoting angle of the actuating shaft 27 or 28 also being caused by the circumferential extent of the respective elongated hole 30 the axis 22 is set. Only a driving pin 29 and an elongated hole 30 are shown in FIG. 2.
  • the actuation shafts 27, 28 are each pivoted by means of an operating lever 31 which has a push-in sleeve 32 and an actuating handle 33 attached to it.
  • an operating lever 31 which has a push-in sleeve 32 and an actuating handle 33 attached to it.
  • the tubular plug-in sleeve 32 is pushed onto the corresponding support tube section 20 or 20 ', with recesses 34 formed on the inside of the plug-in sleeve 32 engaging with the driving pin 29.
  • the configuration of the operating lever 31 can be seen in FIG. 3.
  • the actuating handle 33 protrudes - on the axis 22 - on one side via the push-in sleeve 32, as can be seen in FIGS. 2 and 3.
  • the push-in sleeve 32 can be plugged onto the support tube section 20 'in such a way that the operating lever 31 projects outwards in the direction of the armrest 18, as shown in FIG. 2 below if - what Fig. 2 can be removed above - no armrest 18 is to be provided, then the operating lever 31 can be plugged onto the support tube section 20 such that the actuating handle 33 projects in the direction of the adjacent bearing bush 19.
  • the front end of the respective support tube section 20 having the recesses 26 only has to be closed with a cover cap. As can be seen from FIG.
  • an area of the respective support tube section 19 or 20 forming a bearing section 35 is left free between the respective bearing bush 19 'and the adjacent push-in sleeve 32.
  • the seat 10 is pivotally supported on these storage areas, as will be shown further below.
  • the chair column 4 has a generally known length-adjustable gas spring 36 which is held in a clamping manner in the form of a cone-shaped clamping device 37 of the front seat support part 6.
  • a valve actuation pin 38 protrudes upward from the gas spring 36, and when it is inserted into the gas spring 36, an existing valve is opened, making length adjustments of the gas spring 36 possible.
  • Gas springs are generally known in practice and are shown and described, for example, in DE 18 12 282 C2 (corresponding to US Pat. No. 3,656,593).
  • a two-armed valve actuation lever is provided, which is pivotably supported against the pivot axis 8, as can be seen in FIG. 4.
  • a lever arm 40 of the lever 39 bears against the valve actuation pin 38, while the other lever arm 41 ends in the region of the open space 23.
  • a valve actuating arm 42 attached to the actuating shaft 27 for seat height adjustment, specifically to its section projecting into the open space 23, which projects approximately radially to the axis 22 from the actuating shaft 27. It engages with its free end under the adjacent free end of the lever arm 41, so that when the actuating shaft is pivoted in such a way that the free end 43 is pivoted upward, the lever arm 40 of the lever 39 is pivoted downward and the valve actuating pin 38 pushes into the gas spring 36. In Fig. 4 this pivoting takes place counterclockwise.
  • the pin 38 is reset by the gas pressure in the gas spring 36, as a result of which the lever 39 and thus the actuating shaft 27 are also reset in their initial position.
  • the seat 10 is snapped elastically onto the support tube sections 20, 20 'by means of latching sections 44 which partially encompass the bearing sections 35. Since the seat 10 together with the latching sections 44 is made in one piece from hard elastic plastic, this is readily possible.
  • the latching sections 44 are shown in particular in FIG. 6.
  • the seat 10 In its rear area, the seat 10 is supported on the support axis 12 which is mounted in approximately horizontally extending elongated holes 45 in the rear seat support part 7 and which extends parallel to the axis 22 and to the pivot axis 8.
  • the seat 10 is snapped onto this support axis 12 by means of latching openings 46 which are formed in webs 47 of the seat 10 which extend downward from the seat 10.
  • the elongated hole 45 in the rear seat support part 7 enables such pivoting occurring substantially horizontal relative movements between the seat 10 and the rear seat support part 7 by the support axis 12 executing these movements in the elongated holes 45.
  • the rear seat support part 7 is pivoted about the pivot axis 8
  • the backrest 15 is pivoted in accordance with the pivoting movements of the rear seat support part 7.
  • the seat 10 is pivoted about the stationary axis 22 due to the essentially vertical pivoting movements of the support axis 12 mounted in the rear seat support part 7.
  • a force accumulator 48 which in the exemplary embodiment shown is a prestressed helical compression spring 49.
  • This helical compression spring 49 is supported via a pivotable abutment 50 against the front seat support part 6 below the actuating shaft 28 in the open space 23. With its other end, the compression spring 49 is supported against a slide shoe 51 of the force changing device 17.
  • the sliding shoe 51 in turn bears against a sliding surface 52 which is formed on a lever arm 53 of the rear seat support part 7.
  • This lever arm 53 is formed in one piece with the rear seat support part and extends essentially downwards from the pivot axis 8.
  • the rear seat support part is designed as an angle lever.
  • the pivotable abutment 50 is provided with a rod 54 passing through the compression spring 49, on which the slide shoe 51 can also be displaced in the direction of the compression spring 49.
  • the force changing device 17 acts on the end of the rod 54 opposite the abutment 50. It has an adjusting screw 55 articulated on the rod 54, which engages in an adjusting nut 56 which is designed as part of a turning handle 57 and is mounted in a lower wall 58 of the front seat support part 6 so as to be rotatable but non-displaceably in the direction of the adjusting screw 55 is.
  • the sliding surface 52 lies at least approximately on a circular arc section, the center point of which is formed by the swivel joint 59, the distance b between the swivel joint 59 and the intersection of the axis 60 with the sliding surface 52 is not or only slightly changed when the rotary handle 57 is rotated that the bias of the helical compression spring 49 does not change with such adjustments.
  • the force acting on the lever arm 53 by the compression spring 49 is therefore not changed; it is only by changing the distance a between the axis 60 and the pivot axis 8 that the effective lever arm, i.e. Overall, the torque acting from the compression spring 49 on the rear seat support part 7 and thus on the seat 10 and the backrest 15 changes. This torque is smaller the smaller the distance a is and vice versa. This means that the adjustment forces to be applied to the rotary handle 57 can also be kept constant over the entire adjustment path of the slide shoe 51, since the frictional forces between the slide shoe 51 and the sliding surface 52 practically do not change.
  • a locking device 61 is provided.
  • This locking device 61 shown essentially in FIGS. 2 and 5, has a locking lever 62 which is attached to the lever arm 53 of the rear seat support part 7 by means of a pivot connection 63 and can be pivoted about an axis parallel to the pivot axis 8.
  • the swivel connection 63 is located in the lower region of the lever arm 53, and is therefore at a clear distance from the swivel axis 8.
  • the locking lever 62 is on its underside with an approximately perpendicular to its longitudinal direction provided stop surface 64, which is associated with a fixed locking surface 65.
  • This locking surface 65 is formed in the front seat support part 6, specifically in the area of the lower wall 58 thereof.
  • the locking surface 65 faces the pivot connection 63, whereas the stop surface 64 faces the locking surface 65.
  • the locking lever 62 has a fork-shaped end 66, under which a locking actuating arm 67 engages, which is T-shaped and is fixedly connected to the actuating shaft 28.
  • a crossbar 67a of the actuating arm 67 therefore engages under the fork-shaped end 66.
  • the actuating arm 67 protrudes radially from the section of the actuating shaft 27 located in the open space 23 in relation to the axis 22.
  • the locking actuating arm 67 is pivoted between a position shown in solid lines in FIG. 5 and a position shown in broken lines there. In the position shown in solid lines in FIG. 5, the locking actuating arm 67 lifts the locking lever 62 to such an extent that its stop surface 64 disengages from the locking surface 65. If the user of the chair now presses the backrest 15 back against the force of the compression spring 49, the fork-shaped end 66 of the locking lever 62 on the T-shaped actuating arm 67 can be displaced in the direction of the actuating shaft 27. So it is possible to rock freely with the synchronous mechanism.
  • the actuating shaft 28 is pivoted into the position shown in broken lines in FIG. 5 by means of the operating lever 31, the transverse web 67a of the T-shaped actuating arm 67 comes out of engagement with the fork-shaped end 66, so that the latter is connected to the locking surface 65 via one Guide pin 68 can fall.
  • This pivoting down of the locking lever 62 is only possible if the rear seat support part 7 is pivoted by the force of the compression coil spring 49 with a corresponding relief of the backrest 15 and the seat 10 into a position in which the backrest 15 and its front end position the seat 10 assumes its upper end position.
  • a continuous rod-shaped support axis 12 is not provided, but the support axis 12 'is formed by two pins 71, 71', which are held clamped in bearing parts 72 on the underside of the seat 10, so that they can also be retrofitted or, if necessary, without destruction the seat 10 can be pulled out. They are - as can be seen in FIGS. 7 and 8 - on both sides of the rear seat support part 7, so that they can pivot past the webs 47 thereof.
  • a rocker 73 designed in the manner of a double-armed lever is pivotably mounted on the seat support part 7 about a pivot axis 74.
  • the pivot axis 74 is inserted into openings 47a in the webs 47 of the rear seat support part 7. It also penetrates web-like bearing cheeks 73a which are formed on the underside of the rocker 73 facing the rear seat support part 7.
  • the pivot axis 74 can be held clamped in the webs 47 or the web-like bearing cheeks 73a.
  • the rocker 73 has two fork-shaped lever arms 75, 75 'which are also located on both sides of the rear seat support part 7 and each overlap a pin 71 or 71', so that when the rocker 73 is pivoted about the pivot axis 74 parallel to the pivot axis 8, the pins 71, 71 'in the height can be changed.
  • the seat 10 in an otherwise fixed position from the rear seat support part 7 to the front seat support part 6, i.e. without simultaneous adjustment of the position of the backrest 15, the seat 10 is pivoted about the axis 22, so that its rear region 76 has a higher or lower position relative to the rear seat support part 7 occupies.
  • These swiveling of the rocker 73 are realized in a similar manner to the swiveling of the compression spring 49 of the force changing device 17.
  • an adjusting screw 78 is articulated which engages in an adjusting nut 79.
  • This is firmly connected to a rotary handle 80 which, together with the adjusting nut 79, is rotatably but immovably mounted in the direction of the adjusting screw 78 in an opening 81 in a wall 82 of the rear seat support part 7.
  • the adjusting screw 78 has at its end opposite the adjusting nut 79 a transverse web 83 which engages in elongated holes 84 of abutment webs 85 of the lever arm 77.
  • the adjusting nut 79 When mounting the seat inclination adjustment device 13, which is possible as an additional equipment, if necessary subsequently, the adjusting nut 79 is pushed from above through the opening 81 in the wall 82 and the rotary handle 80 is set against it from below; both parts are then connected with a screw 86.
  • the rocker 73 is connected to the rear seat support part 7 by inserting the pivot axis 74.
  • the support axis 12 is pulled out of the elongated holes 45.
  • the pins 71, 71 'are then inserted into the fork-shaped lever arms 75, 75'.
  • the seat 10 is connected to the front support tube 9 in that the latching sections 44 are elastically snapped onto the support tube sections 20, 20 ', on which they can be pivoted about the axis 22. The disassembly takes place accordingly.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Hydrogenated Pyridines (AREA)
EP94110869A 1993-07-22 1994-07-13 Chaise, notamment chaise de bureau Expired - Lifetime EP0635227B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4324541 1993-07-22
DE4324545A DE4324545C2 (de) 1993-07-22 1993-07-22 Stuhl, insbesondere Bürostuhl
DE4324541A DE4324541A1 (de) 1993-07-22 1993-07-22 Stuhl, insbesondere Bürostuhl
DE4324543A DE4324543C2 (de) 1993-07-22 1993-07-22 Stuhl, insbesondere Bürostuhl
DE4324542A DE4324542A1 (de) 1993-07-22 1993-07-22 Stuhl, insbesondere Bürostuhl

Publications (2)

Publication Number Publication Date
EP0635227A1 true EP0635227A1 (fr) 1995-01-25
EP0635227B1 EP0635227B1 (fr) 1997-10-15

Family

ID=42309850

Family Applications (2)

Application Number Title Priority Date Filing Date
EP94110869A Expired - Lifetime EP0635227B1 (fr) 1993-07-22 1994-07-13 Chaise, notamment chaise de bureau
EP94110870A Expired - Lifetime EP0635228B1 (fr) 1993-07-22 1994-07-13 Chaise, notamment chaise de bureau

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP94110870A Expired - Lifetime EP0635228B1 (fr) 1993-07-22 1994-07-13 Chaise, notamment chaise de bureau

Country Status (8)

Country Link
US (2) US5797653A (fr)
EP (2) EP0635227B1 (fr)
JP (2) JP3544709B2 (fr)
AT (2) ATE143235T1 (fr)
DE (6) DE4324542A1 (fr)
DK (2) DK0635228T3 (fr)
ES (1) ES2107715T3 (fr)
FI (2) FI109574B (fr)

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Citations (1)

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DE4324543C2 (de) 2003-06-26
FI943434A (fi) 1995-01-23
DK0635227T3 (da) 1998-06-02
JPH0751144A (ja) 1995-02-28
EP0635227B1 (fr) 1997-10-15
ES2107715T3 (es) 1997-12-01
DE4324545C2 (de) 2003-10-16
US5564783A (en) 1996-10-15
FI109574B (fi) 2002-09-13
DE4324545A1 (de) 1995-01-26
JP3544709B2 (ja) 2004-07-21
FI105889B (fi) 2000-10-31
DE4324541A1 (de) 1995-01-26
JPH0751143A (ja) 1995-02-28
DE4324543A1 (de) 1995-01-26
FI943433A0 (fi) 1994-07-20
EP0635228B1 (fr) 1996-09-25
US5797653A (en) 1998-08-25
FI943433A (fi) 1995-01-23
DE59404317D1 (de) 1997-11-20
ATE159154T1 (de) 1997-11-15
ATE143235T1 (de) 1996-10-15
EP0635228A1 (fr) 1995-01-25
FI943434A0 (fi) 1994-07-20
JP3549577B2 (ja) 2004-08-04
DK0635228T3 (fr) 1997-03-17
DE4324542A1 (de) 1995-01-26
DE59400730D1 (de) 1996-10-31

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