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EP2745740A1 - Neigungssteuerungsvorrichtung, insbesondere für einen Stuhl, und Verfahren zum Betrieb - Google Patents

Neigungssteuerungsvorrichtung, insbesondere für einen Stuhl, und Verfahren zum Betrieb Download PDF

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Publication number
EP2745740A1
EP2745740A1 EP13193075.2A EP13193075A EP2745740A1 EP 2745740 A1 EP2745740 A1 EP 2745740A1 EP 13193075 A EP13193075 A EP 13193075A EP 2745740 A1 EP2745740 A1 EP 2745740A1
Authority
EP
European Patent Office
Prior art keywords
control device
tilt control
receptacle
members
locking member
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
EP13193075.2A
Other languages
English (en)
French (fr)
Other versions
EP2745740B1 (de
Inventor
Leif Vartdal
Halstein Kvangraven
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.)
SCANDINAVIAN BUSINESS SEATING AB
Original Assignee
Scandinavian Business Seating AS
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 Scandinavian Business Seating AS filed Critical Scandinavian Business Seating AS
Publication of EP2745740A1 publication Critical patent/EP2745740A1/de
Application granted granted Critical
Publication of EP2745740B1 publication Critical patent/EP2745740B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • 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
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/026—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
    • 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
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • 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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism

Definitions

  • the invention relates to tilt control mechanisms for chairs. More specifically, the invention concerns a tilt control device for controlling relative movements between a first member and a second member that are pivotally connected, as specified in the preamble of claim 1, and method of controlling relative movements as specified in the preamble of claim 7 and claim8.
  • a tilting mechanism for an office chair typically includes two housing parts, one part attached to the seat and the other part attached to the chair pedestal.
  • the housing parts are interconnected by an axle, allowing the seat to be pivoted, or tilted, with respect to the pedestal.
  • a spring is arranged between the housing parts so as to dampen the pivoting movements, and is normally configured such that the neutral (equilibrium) state of the spring corresponds to a more or less horizontal seat position.
  • a locking device provides a means for locking, or fixating, the housing parts with respect to one another at any given tilting angle. In use, the seat tilt angle is controlled by the user (shifting his or her weight on the seat), and the seat may be locked at the desired tilt angle.
  • Known tilt locking mechanisms include frictional plates and locking pins.
  • the preloaded spring will tend to move the seat back to the horizontal position. If the user at this instant has shifted his or her position on the chair, the sudden release of the tilt lock mechanism will cause an undesirable abrupt movement of the seat and the backrest.
  • a tilt control device for controlling relative movements between a first member and a second member that are pivotally connected; the first member comprising at least one receptacle, and the second member comprising a guide; the tilt control device further comprising a movable tilt locking member configured for removably entering the guide and the at least one receptacle in order to selectively lock and unlock the first and second members with respect to one another, characterized in that an operating member is operably connected to the locking member via actuating means, said actuating means being configured and arranged to allow relative movement between the operating member and the locking member, and wherein the operating member and the locking member are not directly connected, but the operating member controls the movement of the locking member via the actuating means.
  • the actuating means comprise at least one resilient element.
  • the actuating means comprise a pair of springs arranged on opposite sides of an enlarged portion of the locking member in a manner such that when one spring is in compression and exerting a motive force on the locking member, the other spring is in tension or in a relaxed state, and vice versa.
  • the first member is connected to a chair column and the second member is connected to a chair seat, and the locking member is arranged for reciprocal movement in a main body which is connected to the second member.
  • a main body is connected to the second member and comprises a bore configured for slidingly receiving the locking member, and the operating member is slidably arranged on the outside of the main body.
  • the first member comprises a plurality of receptacles arranged at regular intervals.
  • said movements are caused by a user sitting on the chair seat and shifting his or her weight with respect to the chair column.
  • Figure 1 shows an embodiment of the tilt control device on tilting assembly 4 on an office chair having a seat 3 supported by a column 2.
  • the column 2 is connected to a pedestal (not shown), in a manner which is commonly known in the art.
  • the chair may also conveniently comprise a backrest (not shown).
  • the tilting assembly is of a type that is generally known in the art, having a lower housing part 5 which is connected to the column 2, and an upper housing part 6 which is connected to the seat 3.
  • the housing parts 5,6 are pivotally connected by an axle (reference number 28 in figure 4a ) via holes 8.
  • a spring (not shown) that serves to dampen the pivoting movements, and is configured such that the neutral (equilibrium) state of the spring corresponds to a more or less horizontal seat position.
  • Such spring arrangements are generally known in the art and need therefore not be described further her.
  • the illustrated embodiment of the invented tilt control device comprises a main body 12 connected to the upper housing part 6 via a footing foundation 9 and bolts 10.
  • the main body 12 has a generally cylindrical shape and a trough-going axial bore 31 configured for slidingly receiving a locking bolt 16.
  • the bolt 16 has a stem portion 17 and a head portion 20 and an intermediate shoulder portion 19.
  • the bore is open in both ends, and the inner end 33 ( figure 3 a) is shaped to receive the stem portion but not the head portion.
  • the stem portion 17 may thus slide partly through the inner end 33 and guide opening 30 in the upper housing part 6.
  • An inner coil spring 27 is arranged around and coaxially with the stem portion 17. In the assembled state, in the bore of the main body 12, the inner spring 27 is arranged to abut against the shoulder portion 19 at one end, and the inner wall portion 32 at the other end.
  • a control knob 7 is slidingly arranged on the outside of the main body 12.
  • the knob 7 has an internal cavity and an annular groove 29 that is configured for accommodating a portion of the main body 12.
  • an outer coil spring 26 is arranged in the knob internal cavity, and abuts against the bolt head portion 20 at one end and the bottom of the knob cavity 34 at the other end.
  • the knob 7 comprises two grooves 14 (diametrically opposite each other) that each is configured for cooperating with a respective cam 24 and detent 23 on the main body 12.
  • the detent 23 serves as an outer limiter for the knob's reciprocal movement on the main body.
  • Figure 5a shows the knob in this outer position: the knob collar 25 is abutting against the main body detent 23.
  • the cam 24 is connected to the main body 12 via strip portions 21 (see figure 4c ) such that the cam may flex elastically inwards.
  • the cam is momentarily depressed by the collar 25.
  • the cam then serves to hold the know in the position shown in figure 5b .
  • the collar snaps back over the flexible cam.
  • control knob 7 and the locking bolt 16 are thus not directly connected, but the control knob 7 controls the movements of the locking bolt 16 via intermediate resilient elements (springs 26, 27).
  • the lower housing part 5 comprises a number of receptacles 18, arranged at regular intervals in an arcuate configuration corresponding to the arcuate tilting movement M. Each receptacle 18 is configured for receiving a portion of the locking bolt stem portion 17.
  • the upper housing part 6 and the lower housing part 5 may thus be interlocked at a plurality of tilt angles, by inserting the locking bolt 16 into any one of the receptacles 18 (as illustrated in e.g. figure 5c ).
  • Figure 5a and figure 6a both illustrate the tilt control device in an "unactivated and unlocked” state: the knob 7 is pulled back to a position where the collar 25 abuts against the detent 23, and the locking bolt 16 is also retracted into the main body 12. The bolt is not engaging any of the receptacles 18, and the lower housing part 5 and the upper housing part 6 are free to move relative to one another (i.e. pivot about the axle 28, cf. figure 4a ) In this state of the tilt control device, the outer spring 26 and the inner spring 27 are in a state of equilibrium.
  • Figure 5b and figure 6b both illustrate the tilt control device in an "activated and unlocked" state.
  • the lower housing part 5 and the upper housing part 6 have moved with respect to one another so that the locking bolt 16 is not aligned with any of the receptacles.
  • the knob 7 has been pushed inwards, to a position where the collar 25 has moved across the cam 24, thereby compressing the outer spring 26 and thus urging the locking bolt 16 towards the lower housing part 5 where the free end of the stem portion 17 abuts against the lower housing part 5 between adjacent receptacles 18.
  • the device is thus set to lock.
  • the housing parts 5, 6 may move slightly with respect to one another, but once the stem portion 17 is aligned with a receptacle 18, the stem will be urged (by the compressed outer spring 26) into that receptacle and lock the housing parts 5, 6 with respect to one another.
  • This state is illustrated in figures 5c and 6c .
  • Figure 5c and figure 6c both illustrate the tilt control device in an "unactivated and locked” state: the knob 7 has been pushed inwards as described above with respect to figures 5b and 6b , and a forward portion of the stem 17 is arranged in a receptacle 18. The housing parts 5, 6 are thus locked with respect to one another.
  • the outer spring 26 has been somewhat extended (relaxed) and the inner spring 27 has been compressed, compared to the state of the springs illustrated in figures 5b , 6b .
  • FIG. 5d and 6d both illustrate the tilt control device in an "activated and locked" state: a part of the stem 17 is still in the receptacle (as in figures 5c and 6c ), but the housing parts 5, 6 have move slightly with respect to one another (e.g. by the user shifting his or her weight on the chair seat), thereby causing the receptacle 18 to pinch and hold the stem portion 17.
  • the knob 7 has been pulled outwards, and as the stem portion is being held (pinched) in place in the receptacle (in the locked state), the inner spring 27 is in the same state as illustrated in figures 5c and 6c .
  • the outer spring 26 is allowed to expand, compared to the state illustrated in figures 5c and 6c .
  • the invented tilt control device thus ensures that the locking bolt stem 17 always enters the closest receptacle 18 when the device is set to lock ( figure 5b and 6b ).
  • the invented tilt control device also ensures that the housing parts 5, 6 are not released (allowed to pivot) with respect to one another unless the user is sitting on the seat and relieving the pinching force as described above with reference to figures 5d and 6d .

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)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Mechanical Control Devices (AREA)
EP13193075.2A 2012-12-19 2013-11-15 Neigungssteuerungsvorrichtung, insbesondere für einen Stuhl, und Verfahren zum Betrieb Active EP2745740B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20121538A NO336920B1 (no) 2012-12-19 2012-12-19 Vippestyringsinnretning og fremgangsmåte

Publications (2)

Publication Number Publication Date
EP2745740A1 true EP2745740A1 (de) 2014-06-25
EP2745740B1 EP2745740B1 (de) 2016-08-10

Family

ID=49578221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13193075.2A Active EP2745740B1 (de) 2012-12-19 2013-11-15 Neigungssteuerungsvorrichtung, insbesondere für einen Stuhl, und Verfahren zum Betrieb

Country Status (4)

Country Link
EP (1) EP2745740B1 (de)
KR (1) KR20140079743A (de)
CN (1) CN103876509B (de)
NO (1) NO336920B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3620082A1 (de) * 2018-09-10 2020-03-11 Sedus Stoll AG Arretierungsvorrichtung für ein verschwenkbares sitzmöbel, sitzmöbel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0902634B1 (de) * 1996-01-08 2000-04-05 Imarc S.p.A. Vorrichtung zum einstellen des neigungswinkels der sitzflächen im allgemeinen
US6213552B1 (en) * 1998-01-16 2001-04-10 Miotto International Company Multi-position chair control mechanism for synchronously adjusting the seat and backrest of a chair
US20100187883A1 (en) * 2009-01-23 2010-07-29 Chen Yung-Hua Apparatus for adjusting the seat back angle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5375912A (en) * 1990-08-10 1994-12-27 Stulik; Edward L. Reclining chair
JP2010233840A (ja) * 2009-03-31 2010-10-21 Aisin Seiki Co Ltd シートリクライニング装置
CN101731861B (zh) * 2009-12-30 2012-05-30 韩汝辉 一种靠背倾斜角度可调的座椅

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0902634B1 (de) * 1996-01-08 2000-04-05 Imarc S.p.A. Vorrichtung zum einstellen des neigungswinkels der sitzflächen im allgemeinen
US6213552B1 (en) * 1998-01-16 2001-04-10 Miotto International Company Multi-position chair control mechanism for synchronously adjusting the seat and backrest of a chair
US20100187883A1 (en) * 2009-01-23 2010-07-29 Chen Yung-Hua Apparatus for adjusting the seat back angle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3620082A1 (de) * 2018-09-10 2020-03-11 Sedus Stoll AG Arretierungsvorrichtung für ein verschwenkbares sitzmöbel, sitzmöbel

Also Published As

Publication number Publication date
KR20140079743A (ko) 2014-06-27
EP2745740B1 (de) 2016-08-10
CN103876509A (zh) 2014-06-25
NO336920B1 (no) 2015-11-23
CN103876509B (zh) 2018-10-26
NO20121538A1 (no) 2014-06-20

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