EP0648452A2 - Dispositif de réglage en hauteur pour dossiers de chaises - Google Patents

Dispositif de réglage en hauteur pour dossiers de chaises Download PDF

Info

Publication number
EP0648452A2
EP0648452A2 EP94112672A EP94112672A EP0648452A2 EP 0648452 A2 EP0648452 A2 EP 0648452A2 EP 94112672 A EP94112672 A EP 94112672A EP 94112672 A EP94112672 A EP 94112672A EP 0648452 A2 EP0648452 A2 EP 0648452A2
Authority
EP
European Patent Office
Prior art keywords
clamping body
fastening element
height adjustment
lever
clamping
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
EP94112672A
Other languages
German (de)
English (en)
Other versions
EP0648452B1 (fr
EP0648452A3 (fr
Inventor
Konrad Neumüller
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.)
Sifa Sitzfabrik GmbH
Original Assignee
Sifa Sitzfabrik GmbH
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 Sifa Sitzfabrik GmbH filed Critical Sifa Sitzfabrik GmbH
Publication of EP0648452A2 publication Critical patent/EP0648452A2/fr
Publication of EP0648452A3 publication Critical patent/EP0648452A3/fr
Application granted granted Critical
Publication of EP0648452B1 publication Critical patent/EP0648452B1/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
    • 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
    • A47C7/402—Support for the head or the back for the back adjustable in height

Definitions

  • the invention relates to a height adjustment for backrests of chairs, in particular office swivel chairs, with the features of the preamble of claim 1.
  • Screw clamps for adjusting the height of a backrest consisting of an optionally padded backplate, which is connected to a fastening element which is arranged in a longitudinally displaceable manner on a backrest support, and with locking means for mutually clamping the backrest support and fastening element, have been known for a long time .
  • the object of the invention is to provide a height adjustment for backrests of chairs, in particular office swivel chairs, which is extremely easy to use and which can be easily adapted to different backrest supports.
  • the fixing means of a height adjustment for backrests of chairs of the type mentioned at the beginning consists of a clamping body which is arranged on the side of the fastening element opposite the back plate.
  • the clamping body has at least one through bore or at least one through slot and at least one anchor is guided at one end through a bore or a slot of the fastening element and held therein with undercuts.
  • the armature is passed through the clamping body and connected to a lever by means of a bore and a pin, the lever is pivotably mounted around the pin and has an attachment which can be pivoted in between the pin and the clamping body in a clamping manner, as a result of which the tensile force exerted on the anchor and the simultaneous pressure on the clamping body determines the fastening element and the backrest support to one another. It is advantageous if the attachment can be swiveled in a short distance over the highest pressure point and comes into a latching position.
  • the clamping body between the fastening element and the bolt is advantageously designed to be adjustable in height.
  • the clamping body consists of two parts lying against one another and displaceable relative to one another on an inclined surface, wherein at least one compression spring is arranged between stops of both parts, which strives to press both parts apart along the incline.
  • This arrangement ensures that the clamping adjusts itself automatically, since the compression spring always presses the clamp body to rest against the fastening element and the shoulder and there is sufficient scope for readjustment between the two parts of the clamp body.
  • the abutting parts of the clamping body can also be provided with matching locking means, such as steps or toothings.
  • the clamping body is an elastic element made of hard rubber or an elastomer.
  • a pressure body is arranged between the shoulder of the lever and the clamping body.
  • This pressure body is, for example, pivotally mounted on one side on the side pin of the extension of the lever and rounded on the other side and lies in a trough of the clamping body, the pressure body being able to be brought into a clamping locking position over the highest pressure point of the extension and the pressure body when the extension is pivoted in is.
  • At least one tension spring is advantageously used between an upper region of the backrest support and a lower region of the fastening element.
  • FIGS. 1 to 3 The height adjustment shown in FIGS. 1 to 3 is shown here with a backrest made of back plate 1, backrest support 2 and fastening element 3.
  • the back plate 1 which can be a wooden plate or a plastic or metal shell, is screwed to the flat fastening element 3.
  • the fastening element 3 and the backrest support 2 are connected by the clamping device, which is shown in FIG. 1 in the open position and in FIG. 2 in the closed position.
  • One side of the clamp is formed by undercuts 15 of an anchor 7, which is guided through slots in the fastening element 3 and the backrest support 2.
  • the slot 16 in the fastening element 3 is designed so that the anchor 7 with its undercuts 15 comes to rest behind and next to it, while the slot 22 in the backrest support 2 has the length by which the backrest is to be moved along the backrest support 3 to the maximum .
  • the armature 7 has a bore 14, with which it engages in a central recess 8 'on an attachment 8''of a lever 8 which is directed towards the fastening element in the clamping position and which also has holes 9 on the side of this recess 8'.
  • a bolt 10 is inserted through the bores 9, 14 so that the lever 8 is pivotably mounted on the armature 7.
  • the clamping body consists of two rectangular parts 4, 5 with a triangular cross-section, so that there are two inclined surfaces with which the two parts 4, 5 lie against each other so that there is an overall approximately rectangular cross-section. Both parts 4, 5 can slide against each other on the inclined surfaces, whereby they are held together and limited in their movement in that one part 4 laterally has pins 21 and the other part has protruding webs 20 with elongated holes 20 '.
  • the inclined surfaces of both parts as is shown in more detail in FIG. 6 with reference to part 4, are provided with longitudinal grooves 24, which are each provided with stops 4 'at the flat end of part 4, 5 and in which compression springs 6 are located looking to push the two parts 4, 5 apart along their slopes.
  • both parts 4, 5 of the clamping body endeavor to achieve a greater overall height than the fastening element 3, as a result of which the original clamping force, which decreases due to wear or fatigue of individual parts, is always restored by a quasi-growing clamping body.
  • Both parts 4, 5 of the clamping body have central slots 25 for the armature 7.
  • a slotted spacer plate 13 is inserted between the clamping body and the fastening element 3.
  • the lever 8 In the open position, the lever 8 is pivoted outward about the bolt 14 and has brought it into an inclined position via the pins 19 in the elongated holes 12 of the pressure body 11. No clamping takes place between the undercuts 15 of the armature 7 and the clamping body 4, 5.
  • the backrest can be moved along the backrest support 2, being laterally between a lower region of the Fastening element 2 and an upper region of the backrest support 2 in Fig. 5 indicated tension springs 23 are attached, which try to pull the fastening element 3 upwards.
  • the lever 8 is pivoted downward and pulls its pin 19 in the elongated holes 12 of the pressure body 11 in a substantially vertical position to the fastening element 3.
  • a snap effect is achieved, which makes the adjustment function perceptible to the user.
  • a tensile force is exerted on the armature 7 and at the same time a pressure force is exerted on the clamping body, as a result of which the backrest is clamped to the backrest support.
  • the pressure body slides a minimal path beyond the largest pressure point into a latching position.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Clamps And Clips (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP94112672A 1993-10-15 1994-08-13 Dispositif de réglage en hauteur pour dossiers de chaises Expired - Lifetime EP0648452B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4335320 1993-10-15
DE4335320A DE4335320A1 (de) 1993-10-15 1993-10-15 Höhenverstellung für Rückenlehnen von Stühlen

Publications (3)

Publication Number Publication Date
EP0648452A2 true EP0648452A2 (fr) 1995-04-19
EP0648452A3 EP0648452A3 (fr) 1995-12-27
EP0648452B1 EP0648452B1 (fr) 1998-03-18

Family

ID=6500315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112672A Expired - Lifetime EP0648452B1 (fr) 1993-10-15 1994-08-13 Dispositif de réglage en hauteur pour dossiers de chaises

Country Status (14)

Country Link
US (1) US5551754A (fr)
EP (1) EP0648452B1 (fr)
AT (1) ATE164047T1 (fr)
AU (1) AU665154B2 (fr)
CA (1) CA2118076C (fr)
DE (2) DE4335320A1 (fr)
DK (1) DK0648452T3 (fr)
ES (1) ES2117742T3 (fr)
FI (1) FI944813A (fr)
IL (1) IL111089A (fr)
NO (1) NO305971B1 (fr)
RU (1) RU2101994C1 (fr)
TR (1) TR28728A (fr)
ZA (1) ZA948057B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29600214U1 (de) * 1996-01-08 1996-02-29 SIFA Sitzfabrik GmbH, 92237 Sulzbach-Rosenberg Klemmung für höhenverstellbare Rückenlehnen
US5921630A (en) * 1997-06-06 1999-07-13 Cassaday; Terrence Joseph Height adjustment mechanism for a back rest or an arm rest of a chair
US6010193A (en) * 1997-07-14 2000-01-04 Honda Giken Kogyo Kabushiki Kaisha Anti-rattle guide assembly for supporting an armrest or other structure moveable between extended and retracted positions
DE19731105C2 (de) * 1997-07-19 1999-12-16 Thomas Barth Rückenlehne
US6523895B1 (en) * 1999-02-05 2003-02-25 Davis Furniture Industries, Inc. Ergonomic chair
US6062647A (en) * 1999-07-08 2000-05-16 Mei; Teng-Fu Adjustable armrest assembly
US6354664B1 (en) * 2000-11-28 2002-03-12 Su-Ming Chen Height adjusting device for a chair
US7210742B2 (en) * 2005-03-22 2007-05-01 Yao-Chuan Wu Distance adjustment device for chair
CN2848623Y (zh) * 2005-09-28 2006-12-20 明门实业股份有限公司 可调整扶手高度的儿童汽车座椅
US9138061B1 (en) 2012-12-05 2015-09-22 Joel H. Eisenberg Seating
US9770111B2 (en) 2015-03-05 2017-09-26 A-Dec, Inc. Height adjusting mechanism and stool for dental practitioner
KR101698730B1 (ko) * 2016-11-01 2017-01-20 이명주 카시트용 발받침의 위치조절수단

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526430A (en) * 1968-11-18 1970-09-01 Art Metal Knoll Corp Back height adjustment mechanism
US4616877A (en) * 1985-05-09 1986-10-14 Kimball International, Inc. Chair with back height adjustment
US5007678A (en) * 1989-10-11 1991-04-16 Steelcase Inc. Chair back height adjustment mechanism

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1336510A (en) * 1918-12-19 1920-04-13 Collier Keyworth Company Chair-iron
DE2218894A1 (de) * 1972-04-19 1973-10-31 Froescher Kg August Lehnenverstelleinrichtung, insbesondere fuer buerostuehle
SE404407B (sv) * 1977-12-14 1978-10-02 Kalmar Lens Landsting Losbar lasanordning for ror och axlar
JPS56145848A (en) * 1980-04-14 1981-11-12 Morita Mfg Apparatus for adjusting inclination of head rest of treating table
US4596484A (en) * 1984-10-05 1986-06-24 Velbon International Corporation Lock for telescoping tubular support
US5035466A (en) * 1989-04-03 1991-07-30 Krueger International, Inc. Ergonomic chair
DE3939321C2 (de) * 1989-11-28 1993-11-04 Kaltenbach & Voigt Stuhl mit hoehenverstellbarer rueckenlehne
US5232265A (en) * 1992-02-11 1993-08-03 Shepherd Products U.S., Inc. Vertical back adjust for chairs
US5382077A (en) * 1992-07-29 1995-01-17 Doerner Products Ltd. Height adjustment mechanism for a chair seat back

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526430A (en) * 1968-11-18 1970-09-01 Art Metal Knoll Corp Back height adjustment mechanism
US4616877A (en) * 1985-05-09 1986-10-14 Kimball International, Inc. Chair with back height adjustment
US5007678A (en) * 1989-10-11 1991-04-16 Steelcase Inc. Chair back height adjustment mechanism

Also Published As

Publication number Publication date
RU2101994C1 (ru) 1998-01-20
DE4335320A1 (de) 1995-04-20
IL111089A0 (en) 1994-11-28
CA2118076A1 (fr) 1995-04-16
US5551754A (en) 1996-09-03
NO943437D0 (no) 1994-09-15
AU665154B2 (en) 1995-12-14
DK0648452T3 (da) 1998-12-07
RU94036442A (ru) 1996-07-27
EP0648452B1 (fr) 1998-03-18
ZA948057B (en) 1995-06-09
ES2117742T3 (es) 1998-08-16
NO305971B1 (no) 1999-08-30
CA2118076C (fr) 1999-11-16
TR28728A (tr) 1997-02-20
FI944813A0 (fi) 1994-10-13
FI944813A (fi) 1995-04-16
AU7427294A (en) 1995-06-22
ATE164047T1 (de) 1998-04-15
IL111089A (en) 1998-06-15
NO943437L (no) 1995-04-18
DE59405465D1 (de) 1998-04-23
EP0648452A3 (fr) 1995-12-27

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