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

Definitions

• the invention relates to a frame structure for a foldable chair, comprising a seat part and a back rest part swing- ably connected to the rear end of the seat part, whereby the back rest part further is swingably connected to both arm rest parts of the chair at a distance from a point of articulation between the back rest and the seat part, which seat part, adjacent to each arm rest part is provi- ded with a glide extending diagonally in a forward and upward direction, which glides are arranged to cooperate with a locking and/or bearing box rotatively connected to the corresponding arm rest part.
• both arm rest parts have been built up of flat irons welded in a mainly keystone shaped frame structure, to which an ordinary arm rest made of wood is secured by screws. Further, both of the arm rest parts are connected to each other by means of a transversal metal rod.
• a frame structure of this shape has a relati ⁇ vely high weight and, at the same time, it requires a very much labour consuming manufacturing process.
• An object of the present invention is to provide a light and simple frame structure being fast and simple to pro ⁇ cute and comprising a significantly reduced number of components.
• This object is achieved by providing a frame structure characterized in that the frame of the arm rest part is a mainly Z-shapedly bended thin metal sheet, whereby an upper horizontal shoulder of the metal sheet forms the arm rest proper and a lower horizontal shoulder thereof forms a fixing plate for a frame support or a swing means of the chair.
• a frame structure according to the present application a lot of welding work will be eliminated, which signifi ⁇ cantly will reduce the manufacturing costs. Further cha ⁇ racteristics of the invention will appear from the at- tached dependent claims 2 to 5.
• Fig. 1 shows a side view of an example of a frame struc ⁇ ture according to the invention
• Fig. 2 shows the frame structure seen from above
• Fig. 3 shows a front view of the frame structure.
• the present frame structure for a foldable chair com ⁇ prises a seat part 1 and a back rest part 2 swingably connected to the rear end of the seat part 1. Further, the back rest part 2 is swingably connected to both arm rest parts 3 of the chair, preferably around a horizontal axle 4 in an upper rear corner of each arm rest part 3, at a distance from the point of articulation 5 between the back rest 2 and the seat part 1.
• the seat part 1 is slidably suspended in both of the arm rest parts 3 of the chair by means of a pair of glides 6 extending diagonally in a forward and upward direction and solidly fastened to the corresponding sides of the seat part 1, which glide 6 cooperates with a locking and/or bearing box 7 turnably connected to the correspon ⁇ ding arm rest part 3.
• the glide 6 is arranged to slide along the locking and/or bearing box 7.
• the chair is shown in an upright posi- tion.
• the locking member of the locking and/or bearing box 7 is activated by a control means provided on the arm rest part 3 whereby the glide 6 is unlocked and is able to slide along the locking and/or bearing box 7.
• a control means provided on the arm rest part 3 whereby the glide 6 is unlocked and is able to slide along the locking and/or bearing box 7.
• Such a suspension of the back rest part 2 and the seat part i will have a very stabilizing influence on the fra ⁇ me structure proper of the chair, which feature have gi ⁇ ven the idea to this invention to simplify the structure of the frame structure of the chair.
• This aim has been achieved by producing the whole frame of the arm rest part 2 as a mainly Z-shapedly bended and relatively thin metal sheet.
• a required strength of the construction is obtained by the above described suspension of the seat part 1 and the back rest part 2.
• the upper horizontal shoulder 9 of the arm rest part 2, which shoulder extends outwardly from the chair is the arm rest proper of the chair, while the lower horizontal shoulder 10 is a fixing plate for a frame support 11 or a swing means of the chair.
• Locking and/or bearing box 7 is fastened rotatively to the vertical por ⁇ tion of the arm rest part 3, preferably via a fixing pla ⁇ te 12, which will further increase the stability.
• the arm rest part 3 includes four bulgings 13 at the upper bending and three bulgings 13 at the lower bending.
• a possible sideways deviation in the frame structure can preferably be counterworked by a pair of plastic pads 14, or the like, being applied on both sides of the seat part 1. These plastic pads 14 are arranged to fill up the spa- ce between the seat part 1 and the arm rest part 3, with ⁇ out leaving any gap therebetween. By using relatively hard plastic pads 14 the possible sideways deviation in the frame structure of the chair will be efficiently eli ⁇ minated. A preferable position of these plastic pads 14 is in the area around the rear fixing point of each glide 6 in the seat part 1.
• connection of the sitting assembly, i.e. the seat part 1, the back rest part 2, and the arm rest parts 3 to the frame support 11 or the swing means of the chair is pre ⁇ ferably carried out by an H- or I-formed frame secured by srews to the lower shoulder 10 of both arm rest parts 3 which frame possibly via a cradle is connected to a ver ⁇ tical swinging axle of the chair.
• the frame structure of the chair is cushioned and up ⁇ holstered in a suitable way in order to give it a best possible sitting comfort and an esthetic appeal.

Landscapes

• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• General Health & Medical Sciences (AREA)
• Special Chairs (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=8537640

Family Applications (1)

Country Status (3)

Family Cites Families (4)

• 1993
  • 1993-03-26 FI FI931392A patent/FI91707C/fi not_active IP Right Cessation
• 1994
  • 1994-03-23 EP EP94909951A patent/EP0690687A1/en not_active Withdrawn
  • 1994-03-23 WO PCT/FI1994/000106 patent/WO1994022348A1/en not_active Application Discontinuation

Non-Patent Citations (1)

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