WO2001093723A1 - Chair with oscillating back - Google Patents

Chair with oscillating back Download PDF

Info

Publication number
WO2001093723A1
WO2001093723A1 PCT/EP2001/006345 EP0106345W WO0193723A1 WO 2001093723 A1 WO2001093723 A1 WO 2001093723A1 EP 0106345 W EP0106345 W EP 0106345W WO 0193723 A1 WO0193723 A1 WO 0193723A1
Authority
WO
WIPO (PCT)
Prior art keywords
chair
tubular elements
back element
sleeves
lateral tubular
Prior art date
Application number
PCT/EP2001/006345
Other languages
French (fr)
Inventor
Giancarlo Piretti
Original Assignee
Pro-Cord Spa
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 Pro-Cord Spa filed Critical Pro-Cord Spa
Priority to AU67518/01A priority Critical patent/AU6751801A/en
Publication of WO2001093723A1 publication Critical patent/WO2001093723A1/en

Links

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
    • A47C7/405—Support for the head or the back for the back with double backrests
    • 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
    • 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 present invention reates to a chair having an oscillating back, comprising a base structure, a back support structure articulated to the base structure around a transverse axle, and at least one back element born by the back support structure.
  • Seats of this type are normally equipped with elastic fittings which tend to hold the back in an upright position.
  • the user may initiate a backward oscillation of the back by leaning backward so as to produce a force on the back opposed to the return action of the aforesaid elastic fittings.
  • Seats with oscillating backs may also be equipped with a locking device which permits the back to be locked into one or more selected positions.
  • the object of the present invention is to a seat of the above specified type which is simple and functional and which allows the user to obtain a high comfort level in any position of the back.
  • this purpose is achieved by a seat having the characteristics forming the object of the principal claim.
  • FIG. 1 is a schematic side view of a seat in accordance with this invention ⁇
  • FIGS. 2 and 3 are rear views in accordance with arrow II of Figure 1 with an intermediate back element in two different positions
  • FIG. 1 is a cross sections in accordance with line V-V of Figure 4.
  • the number 10 indicates a seat comprising a central support 12, normally adjustable in height, at the top of which is installed a base structure 14.
  • the seat 10 comprises a back 16 installed so as to oscillate with respect to the base structure 14, around a transverse axle indicated with the letter A, which is orthogonal to the presentation plane of Figure 1.
  • the base structure 14 also bears a seat 18 and a pair of arm rests 20, only one of which is visible in Figure 1.
  • the back 16 comprises a support structure essentially constituted by a pair of lateral tubular elements 22 located opposite one another on the sides of the base structure 14.
  • the two tubular elements 22 are parallel to one another and each has its lower end articulated to the base structure 14 around the axle A.
  • the tubular elements 22 are connected to opposite ends of a torsion bar, as described in detail in a contemporary patent application of the same Applicant entitled "Chair with seat and back having synchronized oscillation.”
  • Each of the two tubular elements 22 has a first part 22a which extends from the articulation axis A to the rear of the seat 18 and a second part 22b which extends upward from the end area of the seat 18 in a curved form similar to that of a human being's spinal column.
  • the chair back 16 comprises an upper back element 26 and a lower back element 28.
  • each of the two back elements 26, 28 is fitted with a pair of sleeves 30 which engage the side tubular elements 22.
  • each sleeve 30 is preferably formed by a pair of shells 30a, 30b affixed to one another by screws 32.
  • the two shells 30a, 30b have respective semicircular seats 34a, 34b which form an aperture shaped in correspondence to the outer profile of the tubular element 22.
  • the upper back element 26 is fixed while the lower back element 28 can slide along the lateral elements 22 to permit height adjustment of the user's lumbar support.
  • the back element 28 is obtained simply by means of a sliding connection between the sleeves 30 and the tubular elements 22.
  • the friction contact between the sites 34a, 34b and the outer surface of the tubular elements 22 is sufficient to hold the back element 28 in position.
  • the upper back element can also be adjusted in height in a manner similar to the lower back element.
  • the two sleeves 30 of the lower back element 28 are connected to each other by means of a cross element 36 fixed at each of its ends to a respective sleeve 30 and the sleeves 30 of the upper back element 26 are connected at the top by an arched cross piece 24 which forms a handle which can be used to move the chair.
  • Each of the two back elements 26, 28 is connected to the respective sleeves 30 by means of securing devices which permit the back element 26, 28 to oscillate freely with respect to the support structure of the back around a respective transverse axis indicated by B in Figures 2 and 3.
  • these securing devices may be made differently, provided that they permit a spontaneous adaptation of the back element to ' the user's back when he leans against the seat back.
  • the connection between each back element 26, 28 and the respective sleeves 30 is made by a pair of deformable blocks 38, for example of an elastomer material, secured to the back element 28 and to each of the sleeves 30 and arranged in a manner such as to hold the back element 28 in a central position in the absence of stresses and to permit a free adaptation of the back element 28 to the occupant's back around the transverse axis B.
  • each block 38 is substantially wedge-shaped, with two converging walls 40, 42 fixed respectively to a sleeve 30 and to the back element 26 or 28.
  • the transverse oscillating axis B of each back element 28, 30 is placed substantially in correspondence with the junction zone between the converging walls 40, 42 of the block 38.
  • each block has a cavity 44 that increases the flexibility of the oscillating movement the back elements 26, 28 about the axes B.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

Seat with oscillating back, comprising: a base structure (14), a back support structure (22) articulated with the base structure around a transverse axle (A), and at least one back element (26, 28) born by the back support structure (22). The back support structure comprises a pair of lateral tubular elements (22), which extend upward from the transverse axle (A) and the back element (26, 28) is fitted with a pair of sleeves (30), which engage the said lateral tubular elements (22). Connection devices (38) are provided between each of the said sleeves (30) and the back element (26) to permit oscillation of the back element (26, 28) with respect to the lateral tubular elements (22) around a transverse axis (B).

Description

"Chair with oscillating back"
The present invention reates to a chair having an oscillating back, comprising a base structure, a back support structure articulated to the base structure around a transverse axle, and at least one back element born by the back support structure.
Seats of this type are normally equipped with elastic fittings which tend to hold the back in an upright position. The user may initiate a backward oscillation of the back by leaning backward so as to produce a force on the back opposed to the return action of the aforesaid elastic fittings. Seats with oscillating backs may also be equipped with a locking device which permits the back to be locked into one or more selected positions.
The object of the present invention is to a seat of the above specified type which is simple and functional and which allows the user to obtain a high comfort level in any position of the back.
In accordance with this invention, this purpose is achieved by a seat having the characteristics forming the object of the principal claim.
This invention will now be described in detail, with reference to the accompanying drawings, which are given solely as a non-limiting example, in which:
- Figure 1 is a schematic side view of a seat in accordance with this invention^
- Figures 2 and 3 are rear views in accordance with arrow II of Figure 1 with an intermediate back element in two different positions,
- Figure 4 is a larger scale cross section in accordance with line IV-IV of Figure 2, and
- Figures 5' is a cross sections in accordance with line V-V of Figure 4. With reference to Figure 1, the number 10 indicates a seat comprising a central support 12, normally adjustable in height, at the top of which is installed a base structure 14. The seat 10 comprises a back 16 installed so as to oscillate with respect to the base structure 14, around a transverse axle indicated with the letter A, which is orthogonal to the presentation plane of Figure 1. The base structure 14 also bears a seat 18 and a pair of arm rests 20, only one of which is visible in Figure 1.
The back 16 comprises a support structure essentially constituted by a pair of lateral tubular elements 22 located opposite one another on the sides of the base structure 14. The two tubular elements 22 are parallel to one another and each has its lower end articulated to the base structure 14 around the axle A. Preferentially, the tubular elements 22 are connected to opposite ends of a torsion bar, as described in detail in a contemporary patent application of the same Applicant entitled "Chair with seat and back having synchronized oscillation." Each of the two tubular elements 22 has a first part 22a which extends from the articulation axis A to the rear of the seat 18 and a second part 22b which extends upward from the end area of the seat 18 in a curved form similar to that of a human being's spinal column.
The chair back 16 comprises an upper back element 26 and a lower back element 28. As can be seen in Figures 2 and 3, each of the two back elements 26, 28 is fitted with a pair of sleeves 30 which engage the side tubular elements 22. With reference to Figures 4 and 5, each sleeve 30 is preferably formed by a pair of shells 30a, 30b affixed to one another by screws 32. The two shells 30a, 30b have respective semicircular seats 34a, 34b which form an aperture shaped in correspondence to the outer profile of the tubular element 22. Preferably, the upper back element 26 is fixed while the lower back element 28 can slide along the lateral elements 22 to permit height adjustment of the user's lumbar support. Height adjustment of the back element 28 is obtained simply by means of a sliding connection between the sleeves 30 and the tubular elements 22. The friction contact between the sites 34a, 34b and the outer surface of the tubular elements 22 is sufficient to hold the back element 28 in position. In a non-illustrated variant, the upper back element can also be adjusted in height in a manner similar to the lower back element.
Preferably, the two sleeves 30 of the lower back element 28 are connected to each other by means of a cross element 36 fixed at each of its ends to a respective sleeve 30 and the sleeves 30 of the upper back element 26 are connected at the top by an arched cross piece 24 which forms a handle which can be used to move the chair. Each of the two back elements 26, 28 is connected to the respective sleeves 30 by means of securing devices which permit the back element 26, 28 to oscillate freely with respect to the support structure of the back around a respective transverse axis indicated by B in Figures 2 and 3.
From the construction point of view, these securing devices may be made differently, provided that they permit a spontaneous adaptation of the back element to' the user's back when he leans against the seat back. In the embodiment shown in the figures the connection between each back element 26, 28 and the respective sleeves 30 is made by a pair of deformable blocks 38, for example of an elastomer material, secured to the back element 28 and to each of the sleeves 30 and arranged in a manner such as to hold the back element 28 in a central position in the absence of stresses and to permit a free adaptation of the back element 28 to the occupant's back around the transverse axis B. In a lateral view each block 38 is substantially wedge-shaped, with two converging walls 40, 42 fixed respectively to a sleeve 30 and to the back element 26 or 28. The transverse oscillating axis B of each back element 28, 30 is placed substantially in correspondence with the junction zone between the converging walls 40, 42 of the block 38. Preferably, each block has a cavity 44 that increases the flexibility of the oscillating movement the back elements 26, 28 about the axes B.

Claims

1. A chair with oscillating back, comprising:
- a base structure (14),
- a back support structure (22) articulated to the base structure around a transverse axle (A) , and
- at least one back element (26, 28) born by the back support structure (22) , characterized in that the back support structure comprises a pair of lateral tubular elements (22) which extend upward from the transverse articulation axle (A) and are arranged on opposite sides of the base structure (14), and said back element (26, 28) is fitted with a pair of sleeves (30) which engage said lateral tubular elements (22) , connection devices (38) being provided between each of said sleeves (30) and the back element (26) to permit an oscillation of the back element (26, 28) with respect to the lateral tubular elements (22) around a transverse axis (B) .
2. A chair as in Claim 1, characterized in that it comprises an upper back element (26) and a lower back element (28), each of which is connected to said lateral tubular elements (22) by means of a pair of sleeves (30) .
3. A chair as in Claim 2, characterized in that at least one of said back elements (26, 28) is adjustable in height along said lateral tubular elements (22) .
4. A chair as in Claim 3, characterized in that the sleeves (30) in at least one of said back elements (26, 28) engage said lateral tubular elements (22) in a manner such as to permit their sliding.
5. A chair as in Claim 1, characterized in that it comprises a deformable elastic element (38) inserted between each sleeve (30) and the back element (26, 28) , arranged in a manner such as to permit the oscillation of the back element around the said transverse axis (B) .
6. A chair as in Claim 5, characterized in that said deformable elastic element is constituted by a wedge-shaped block (38) of deformable material.
PCT/EP2001/006345 2000-06-06 2001-06-05 Chair with oscillating back WO2001093723A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU67518/01A AU6751801A (en) 2000-06-06 2001-06-05 Chair with oscillating back

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000TO000537A IT1320402B1 (en) 2000-06-06 2000-06-06 CHAIR WITH OSCILLATING BACKREST.
ITTO2000A000537 2000-06-06

Publications (1)

Publication Number Publication Date
WO2001093723A1 true WO2001093723A1 (en) 2001-12-13

Family

ID=11457790

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/006345 WO2001093723A1 (en) 2000-06-06 2001-06-05 Chair with oscillating back

Country Status (3)

Country Link
AU (1) AU6751801A (en)
IT (1) IT1320402B1 (en)
WO (1) WO2001093723A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2840786A1 (en) 2002-06-17 2003-12-19 Jean Yves Chauve Chair has back made up of slats mounted on central vertical tube using sleeves attached to their rear sides, allowing back to turn as user twists in seat
GB2393388A (en) * 2002-09-06 2004-03-31 Pro Cord Spa Chair backrest
CN102846070A (en) * 2012-07-31 2013-01-02 苏州柏德纳科技有限公司 Back cushion supporting frame
US11744375B2 (en) 2021-07-14 2023-09-05 Anthro Form, Llc Seat configuration

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2001412A1 (en) * 1969-04-30 1970-11-12 Rizzi Dr Med Mario Seat with supports for the back and / or the head
EP0324546A1 (en) * 1988-01-12 1989-07-19 Gerald Nutland Burgess Seating apparatus
US4981325A (en) * 1988-08-25 1991-01-01 Dennis Zacharkow Posture support with multi-planar adjustment
DE9313946U1 (en) * 1993-09-10 1993-11-18 Eron Objekteinrichtungen GmbH, 31582 Nienburg Height-adjustable, split backrest, especially for office chairs
EP0970640A1 (en) * 1998-07-07 2000-01-12 Provenda Marketing Ag Working-chair with backrest

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2001412A1 (en) * 1969-04-30 1970-11-12 Rizzi Dr Med Mario Seat with supports for the back and / or the head
EP0324546A1 (en) * 1988-01-12 1989-07-19 Gerald Nutland Burgess Seating apparatus
US4981325A (en) * 1988-08-25 1991-01-01 Dennis Zacharkow Posture support with multi-planar adjustment
DE9313946U1 (en) * 1993-09-10 1993-11-18 Eron Objekteinrichtungen GmbH, 31582 Nienburg Height-adjustable, split backrest, especially for office chairs
EP0970640A1 (en) * 1998-07-07 2000-01-12 Provenda Marketing Ag Working-chair with backrest

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2840786A1 (en) 2002-06-17 2003-12-19 Jean Yves Chauve Chair has back made up of slats mounted on central vertical tube using sleeves attached to their rear sides, allowing back to turn as user twists in seat
GB2393388A (en) * 2002-09-06 2004-03-31 Pro Cord Spa Chair backrest
GB2393388B (en) * 2002-09-06 2005-04-13 Pro Cord Spa Chair backrest
CN1306893C (en) * 2002-09-06 2007-03-28 普罗-科德有限公司 Back of Chair
CN102846070A (en) * 2012-07-31 2013-01-02 苏州柏德纳科技有限公司 Back cushion supporting frame
US11744375B2 (en) 2021-07-14 2023-09-05 Anthro Form, Llc Seat configuration

Also Published As

Publication number Publication date
ITTO20000537A0 (en) 2000-06-06
AU6751801A (en) 2001-12-17
ITTO20000537A1 (en) 2001-12-06
IT1320402B1 (en) 2003-11-26

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