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
  • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
  • A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest

Definitions

• the invention concerns a chair with an underframe, which is rotatably connected with a back, which is in turn rota ⁇ tably connected with a seat, which is additionally rota ⁇ tably connected at its front end with a foot support, which is so connected with the underframe by control means that the angle formed by the foot support with the seat varies by displacement of the seat-
• the object of the invention is to provide a chair of the present type which, by simple and inexpensive means, enab ⁇ les the provision of such balancing of the forces that the various chair members can be retained with good stability in any desired position without using special locking means,
• the chair is so shaped that the control means are formed by a control rod secured to the foot support and slidable in a slide sleeve rotatably secured to the underframe.
• This structure makes it possible to vary the influence which a pressure against the foot support exerts on the mutual position of the chair members, from virtually zero in the fuuly outwardly pivoted position to an ever increasing influence as the foot support approach- es its inwardly pivoted, substantially vertical position in which it is no longer affected by the weight of a seated person's legs.
• Claim 2 specifies measures to obtain the intended effect.
• the embodiment of the chair as defined in claim 3 provides the advantage that the weight of a seated person and the pressure against the back affect the seat for displace ⁇ ment in opposite directions so that the oppositely acting forces are balanced in all relative seat and back positions.
• fig. 1 is a side view of an embodiment of the chair frame
• fig. 2 shows a detail, illustrating on an enlarged scale control means instrumental in controlling the relative po ⁇ sitions of the chair members in different positions there ⁇ of.
• an underframe is shown in broken lines, compris- ing a ring-shaped foot 10, two wide, plate-shaped legs 11 forming together a V, and two side members 12 forming arm rests and serving to attach the movable members of the chair.
• These members comprise a back frame 13, a seat frame 14 and a foot support frame 15.
• the back frame 13 has at each side a forwardly extending arm 16 which is rotatably connected with the side members of the underframe by a pi ⁇ vot 17.
• the back frame and the seat frame 14 are rotatably interconnected by a hinge 18, and the seat frame and the foot support frame 15 are rotatably interconnected by a hinge 19.
• the foot support frame 15 is firmly connected with two con ⁇ trol rods 20 which are disposed at each side of the frame and form an obtuse angle with the frame and extend oblique- ly upwards and backwards in the position shown in fig. 1.
• Each control rod extends through and is slidable in a slide sleeve 21 which is rotatably secured to the side member 12 - 3 -
• a pivot 22 consists of a low friction material such as e.g. polyamide.
• a fitting 23 is attached to the underside of the seat frame 14 at each side of it and adjacent to its front end, and a slide sleeve 24 of the same type as the sleeve 21 is rotatably secured to the fitting 23 by a pivot 25.
• the slide sleeve 24 surrounds and is slidable on a slide rod 26 which is secured to the side member 12 at both ends and forms an acute angle with the seat frame 14.
• the corresponding positions of the front end of the slide sleeve 24 on the slide rod 26 are marked with the corresponding numerals 0 to 8 on this rod, and the sleeve is shown in broken lines in position 7.
• the control rod 20 is displaced in the slide sleeve 21, which rotates at the same time about the pivot 22.
• the various positions of the centre lines of the control rod and the foot support frame corresponding to the marked positions of the hinge axis are shown by lines 28 and 29, respectively, and also the corresponding positions marked 0 to 8 of the free end of the control rod are shown.
• the slide sleeve 21 is shown in broken lines in position 7.
• the transmission ratio is defined as the ratio of a gi- ven foot support pivot angle to the corresponding displace ⁇ ment of the hinge, it will be seen that this transmission ratio decreases as the members move from position 0 to po ⁇ sition 8. Thus, in all positions, there will be a good ba ⁇ lance of the forces influencing the mutual position of the various members so that there is no need for locking means to retain the members in any desired position.
• the func ⁇ tional relation between angular rotation and displacement can be changed by changing the relative location of pivot axes, control rod and slide rod and of the angles formed by these rods with the other chair members.

Landscapes

• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• General Health & Medical Sciences (AREA)
• Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8109620

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (3)

• 1985
  • 1985-05-08 DK DK203685A patent/DK203685A/da not_active Application Discontinuation
• 1986
  • 1986-05-07 AU AU59055/86A patent/AU5905586A/en not_active Abandoned
  • 1986-05-07 EP EP19860903264 patent/EP0224517A1/en not_active Withdrawn
  • 1986-05-07 WO PCT/DK1986/000049 patent/WO1986006596A1/en unknown

Non-Patent Citations (1)

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