EP0910974A1 - Device for hingeably connecting backrests of chairs and the like to the associated frame, comprising at least one spring spiral with arms which are respectively fixed to said backrest and frame - Google Patents

Device for hingeably connecting backrests of chairs and the like to the associated frame, comprising at least one spring spiral with arms which are respectively fixed to said backrest and frame Download PDF

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Publication number
EP0910974A1
EP0910974A1 EP98203548A EP98203548A EP0910974A1 EP 0910974 A1 EP0910974 A1 EP 0910974A1 EP 98203548 A EP98203548 A EP 98203548A EP 98203548 A EP98203548 A EP 98203548A EP 0910974 A1 EP0910974 A1 EP 0910974A1
Authority
EP
European Patent Office
Prior art keywords
frame
backrest
arms
spring
chairs
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.)
Withdrawn
Application number
EP98203548A
Other languages
German (de)
French (fr)
Inventor
Massimo Scolari
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.)
Giorgetti SpA
Original Assignee
Giorgetti 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 Giorgetti SpA filed Critical Giorgetti SpA
Publication of EP0910974A1 publication Critical patent/EP0910974A1/en
Withdrawn legal-status Critical Current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
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs
    • A47C7/444—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs of torsion type

Definitions

  • the present invention relates to a device for hingeably connecting backrests of seats and the like to the associated frame, comprising at least one spring spiral with opposite arms which are respectively fixed to said backrest and frame.
  • hinging systems for backrests of chairs which systems, although serving their purpose, have a complex and costly structure and an aesthetic appearance which does not blend in with the design of the chair.
  • the technical problem which is posed, therefore, is that of providing a hinging device for backrests of chairs which is structurally simple and reliable and consists of a small number of parts which can be easily assembled and applied to any type of chair, armchair and the like with or without arm-rests.
  • the hinging system should have a certain degree of elasticity so as to provide the backrest with a slightly springy action.
  • a device for hingeably connecting backrests of chairs and the like to the associated frame comprising at least one spring spiral with opposite arms which are respectively fixed to said backrest and frame.
  • the hinging device comprises two pairs of wires 1 which are made of steel or similar material and each of which is twisted so as to form a spiral 2 of a spring with opposite arms 3 and 4 which are respectively fixed to the frame 5 of the chair and to an element 6 supporting the backrest 7 of the chair itself.
  • Each arm 4 fixed to the backrest 7 is provided with a threading 4a.
  • Said element 6 supporting the backrest 7 has a shape substantially in the form of an "L" with the horizontal short arm having a hole 6a for engagement with the threading 4a of the arm 4 of the spring, being fixed thereon by known means such as a weld or a transverse grub screw 6b inserted into the short arm itself until it interacts with the threading 4a.
  • the vertical long arm 6c of the support element 6 has a hole 6d for receiving a screw 8 locking the support 6 of the backrest 7.
  • the arm 3 of the spring inserted into the frame 5 is in turn locked onto the latter by means of a transverse grub screw 5a.
  • a guide bush 9 is also arranged in the region of the hole where the arm 3 enters into the frame 5.
  • the device could be reduced to a single spiral with arms 3 and 4 which are directly inserted into the frame 5 and into the backrest 7 without the need for intermediate elements.

Abstract

Device for hingeably connecting backrests (7) of chairs and the like to the associated frame (5), comprising at least one spring spiral with opposite arms (4,3) which are respectively fixed to said backrest (7) and frame (5).

Description

  • The present invention relates to a device for hingeably connecting backrests of seats and the like to the associated frame, comprising at least one spring spiral with opposite arms which are respectively fixed to said backrest and frame.
  • It is known in the technical sector relating to the production of chairs and the like that there exists the need to hingeably connect the backrest of said chairs to the frame so that the backrest is able to assume different inclinations in order to provide a more comfortable supporting action.
  • Some examples of hinging systems for backrests of chairs are known, which systems, although serving their purpose, have a complex and costly structure and an aesthetic appearance which does not blend in with the design of the chair.
  • The technical problem which is posed, therefore, is that of providing a hinging device for backrests of chairs which is structurally simple and reliable and consists of a small number of parts which can be easily assembled and applied to any type of chair, armchair and the like with or without arm-rests. Within the scope of this problem a further requirement is that the hinging system should have a certain degree of elasticity so as to provide the backrest with a slightly springy action.
  • These technical problems are solved according to the present invention by a device for hingeably connecting backrests of chairs and the like to the associated frame, comprising at least one spring spiral with opposite arms which are respectively fixed to said backrest and frame.
  • Further details may be obtained from the following description of a non-limiting example of embodiment of the invention provided with reference to the accompanying drawings, in which:
    • Figure 1 shows a partially exploded, perspective view of the hinging device according to the invention;
    • Figure 2 shows a perspective view of the device with the backrest mounted;
    • Figure 3 shows a cross-section along a vertical plane of the mounted device.
  • As shown, the hinging device according to the invention comprises two pairs of wires 1 which are made of steel or similar material and each of which is twisted so as to form a spiral 2 of a spring with opposite arms 3 and 4 which are respectively fixed to the frame 5 of the chair and to an element 6 supporting the backrest 7 of the chair itself.
  • Each arm 4 fixed to the backrest 7 is provided with a threading 4a.
  • Said element 6 supporting the backrest 7 has a shape substantially in the form of an "L" with the horizontal short arm having a hole 6a for engagement with the threading 4a of the arm 4 of the spring, being fixed thereon by known means such as a weld or a transverse grub screw 6b inserted into the short arm itself until it interacts with the threading 4a.
  • The vertical long arm 6c of the support element 6 has a hole 6d for receiving a screw 8 locking the support 6 of the backrest 7.
  • The arm 3 of the spring inserted into the frame 5 is in turn locked onto the latter by means of a transverse grub screw 5a. A guide bush 9 is also arranged in the region of the hole where the arm 3 enters into the frame 5.
  • Although described in a form which is functionally complete and structurally entirely reliable, preferably from an aesthetic point of view as well, the device could be reduced to a single spiral with arms 3 and 4 which are directly inserted into the frame 5 and into the backrest 7 without the need for intermediate elements.

Claims (10)

  1. Device for hingeably connecting with a springy action backrests (7) of chairs and the like to the associated frame (5), characterized in that it comprises at least one spring spiral (2) with opposite arms (3,4) which are respectively fixed to said backrest and frame.
  2. Device according to Claim 1, characterized in that said spring spirals are preferably two in number and separate from one another.
  3. Device according to Claim 1, characterized in that said spring spirals are two pairs which are all separate from one another.
  4. Device according to Claim 1, characterized in that said opposite arms of the spring have threaded ends.
  5. Device according to Claim 1, characterized in that it comprises an element (6) for supporting the backrest (7), which is connected to one of the two arms of the spiral.
  6. Device according to Claim 1, characterized in that said support element has a shape in the form of an "L".
  7. Device according to Claim 6, characterized in that said short arm of the "L" is provided with a threaded hole (6a) for engagement with the corresponding threading (4a) of the associated arm (4) of the spiral.
  8. Device according to Claim 2, characterized in that said support element has through-holes on the short side of the "L" for receiving the respective arms (4) of the pair of springs.
  9. Device according to Claim 7 or 8, characterized in that said support element (6) is locked in position on the associated arm (4) by means of a transverse grub screw (6b).
  10. Device according to Claim 1, characterized in that said arm (3) of the spring fixed to the frame (5) is locked in position by means of a transverse grub screw (5a).
EP98203548A 1997-10-23 1998-10-20 Device for hingeably connecting backrests of chairs and the like to the associated frame, comprising at least one spring spiral with arms which are respectively fixed to said backrest and frame Withdrawn EP0910974A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1997MI000753U IT237991Y1 (en) 1997-10-23 1997-10-23 ARTICULATION DEVICE FOR CHAIR BACKRESTS AND SIMILAR TO THE FRAME INCLUDING AT LEAST ONE SPRING OF SPRINGS WHOSE ARMS
ITMI970753U 1997-10-23

Publications (1)

Publication Number Publication Date
EP0910974A1 true EP0910974A1 (en) 1999-04-28

Family

ID=11376716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98203548A Withdrawn EP0910974A1 (en) 1997-10-23 1998-10-20 Device for hingeably connecting backrests of chairs and the like to the associated frame, comprising at least one spring spiral with arms which are respectively fixed to said backrest and frame

Country Status (2)

Country Link
EP (1) EP0910974A1 (en)
IT (1) IT237991Y1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003059123A1 (en) * 2002-01-17 2003-07-24 Green Continental Furniture (M) Sdn Bhd A dining chair with reclining mechanism
WO2008128561A2 (en) * 2007-04-20 2008-10-30 Bruenig Matthias Movable backrest for a chair or armchair

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114034A1 (en) * 1982-12-23 1984-07-25 Intercollection Development SA Seating furniture
US4575150A (en) * 1984-04-09 1986-03-11 Simodow Manufacturing Ltd. Suspension arrangement for a tilting chair
CH673567A5 (en) * 1987-01-14 1990-03-30 Intercollection Dev S A Folding seat - has two coil springs at each side with pairs of arms secured in common bosses
EP0423546A1 (en) * 1989-10-18 1991-04-24 Lista Rebstein AG Easy-chair

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114034A1 (en) * 1982-12-23 1984-07-25 Intercollection Development SA Seating furniture
US4575150A (en) * 1984-04-09 1986-03-11 Simodow Manufacturing Ltd. Suspension arrangement for a tilting chair
CH673567A5 (en) * 1987-01-14 1990-03-30 Intercollection Dev S A Folding seat - has two coil springs at each side with pairs of arms secured in common bosses
EP0423546A1 (en) * 1989-10-18 1991-04-24 Lista Rebstein AG Easy-chair

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003059123A1 (en) * 2002-01-17 2003-07-24 Green Continental Furniture (M) Sdn Bhd A dining chair with reclining mechanism
AU2002303072B2 (en) * 2002-01-17 2007-02-08 Green Continental Furniture (M) Sdn Bhd A dining chair with reclining mechanism
WO2008128561A2 (en) * 2007-04-20 2008-10-30 Bruenig Matthias Movable backrest for a chair or armchair
WO2008128561A3 (en) * 2007-04-20 2009-04-23 Matthias Bruenig Movable backrest for a chair or armchair

Also Published As

Publication number Publication date
IT237991Y1 (en) 2000-09-29
ITMI970753U1 (en) 1999-04-23

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