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—Supports for the head or the back
  • A47C7/40—Supports for the head or the back for the back
  • A47C7/46—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
  • A47C7/462—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
• • 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
  • A47C7/02—Seat parts
  • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
  • A47C7/282—Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes

Definitions

• the invention relates to a chair back and a chair with such a chair back.
• Swivel chairs with a two-part back surface, divided into a lumbar support area and an upper back area, are known in the prior art.
• An inventive chair back comprises an outer chair back frame with two chair back frame legs and an inner, in particular H-shaped clamping frame with two lateral clamping frame legs between which a flexible Bespan- tion and an expandable and compressible clamping frame cross-connection is arranged, in particular to the rear may be formed convex, and it allows the tenter legs can be resiliently together and pushed apart in the lateral direction.
• the chair back comprises at least one, preferably two hand wheels arranged on the outside of a chair back frame leg with a threaded rod extending through the chair back frame leg.
• the voltage of the flexible tension of the inner clamping frame which is particularly suitable for lordosis area, can be adjusted flexibly, so that the tenter optimally adapts to the flexible ends of the seat, especially at the back.
• a chair back with a flexibly adjustable cover provides a high level of comfort, can also be easily manufactured and is very reliable.
• a tilt bearing of the inner clamping frame is provided by the inner clamping frame is pivotally mounted with respect to the outer chair back frame. It is advantageous if the at least one handwheel is located axially on the tilting bearing of the inner clamping frame outside the backrest. It is particularly advantageous if two handwheels are provided, which are located axially on the tilting mounting of the tentering frame on the right and left outside of the backrest.
• the seating comfort can be further increased by additionally adapting the flexible covering of the clamping frame with respect to the inclination points on the back.
• the flexible covering of the clamping frame on the one hand with regard to the deformation due to the flexible covering and other- on the other hand optimally adapt to the back in terms of their inclination due to the tiltable storage and provide increased ergonomics and a further improved seating comfort.
• a cover plate is arranged on the inner side of the clamping frame legs, into which the at least one guide screw engages or with which the at least one guide pin is connected.
• a storage in particular a Nadelrillenlagerung for Threaded rod between the threaded rod and the recess in the chair back frame leg are arranged.
• the outer chair back frame has a flexible covering in an upper back region, the sitting comfort can be further increased.
• the outer chair back frame can be arranged on a chair back support and be telescopically adjustable in height, whereby the chair back can be particularly advantageously adapted to the body size of the seated and the seating comfort can be further increased.
• the invention further relates to a chair, in particular a swivel chair with a chair back of the type described above.
• a chair in particular a swivel chair with a chair back of the type described above.
• the advantages of such a chair or swivel chair correspond to the advantages described above with respect to the chair back. These are not listed again to avoid repetition.
• the invention is explained in more detail below with reference to an embodiment with reference to the accompanying figures.
• FIG. 1 shows a perspective view of a chair back obliquely from behind.
• FIG. 2 shows an exploded view of a portion of the chair back of FIG. 1 from the front.
• Fig. 3 shows an overall view of a chair with a chair back, as described in Figures 1 and 2.
• the chair back 100 includes an outer chair back frame 1 with two laterally disposed chair back frame legs 11 and 12 which are interconnected in an upper portion by a curved, convex, upper cross-link 13 and in a middle to lower portion by a curved, convex, lower cross-link 14 are connected.
• the lower cross-connection 14 attaches to the chair back frame legs 11 and 12
• these each have a slight bend, and at this point are axially on the tilting support of the H-shaped clamping frame 4, on the right and left outside the chair back frame legs 11 and 12 respectively rotatable hand wheels 6a and 6b arranged.
• the handwheels 6a and 6b By means of the handwheels 6a and 6b, there is provided a mounting attachment of the clamping frame legs 41 and 42 of the H-shaped clamping frame, which is such that by turning the two handwheels 6a and 6b, the clamping frame legs 41 and 42 are unfolded and pressed together slightly can be so that the second surface fabric 44 can be stretched and relaxed and so individually adjusted to the needs of the user.
• the chair back 100 is designed so that each of the two clamping frame legs 41 and 42 can be moved over a distance of 0.8 cm, so that when using both hand wheels 6a and 6b a total difference in width of 1, 6 cm between the two clamping frame legs 41 and 42 can be achieved.
• the rubber elements 8 can serve as damping for the clamping frame legs 41 and 42.
• the two handwheels 6a and 6b each have a counter-rotating thread, namely a left-hand thread and a right-hand thread, so that both handwheels 6a and 6b are rotated in the same direction as viewed from the seated end in order to tighten the second surface fabric 44 Reduce tension.
• Fig. 2 shows an exploded view of a portion of the chair back 100 from the front.
• the handwheel 6a can be seen with a threaded rod 61.
• a threaded rod 61 At the bend of the chair back frame leg 11 is an axial bore 1c with a needle groove 1d storage, through which the threaded rod 61 runs in the inserted state of the handwheel 6a.
• the needle groove bearing 1d reduces the friction of the threaded rod 61 and thus ensures easy rotation of the handwheel 6a.
• an axial bore 4 e is provided for receiving a thread deronde 7.
• This threaded probe 7 has on its back a cross-clamping bolt 7a, which engages in a corresponding, on the inside of the clamping frame leg 41 mounted recess and thus secures the threaded probe 7 against rotation.
• the clamping frame leg 41 comprises bores 4a and 4b for cover plate fastening screws 9a and 9b, which connect an end plate 9, which is arranged on the inside of the clamping frame leg 41, firmly to the clamping frame leg 41.
• the tenter leg 41 includes tenter leg bores 4c and 4d for receiving the lead screws 10a and 10b.
• an annular rubber element 8 is provided with four recesses.
• This rubber member 8 is for damping the pivotal movement and the lateral movement of the H-shaped clamping frame 4 with respect to the outer chair back frame 1.
• the rubber element 8 is by means of rubber element fixing screws 8a and 8b, which engage in the holes 1e and 1f of the chair back frame leg 11, firmly bolted to the inside of the chair back frame leg 11.
• the guide screws 10a and 10b extend in the radial longitudinal recesses 1a and 1b of the chair back frame leg 11, through the recesses in the rubber
• the rubber element 8 is elastic and allows a rotation of the guide screws 10a and 10b between the stops of the radial longitudinal recesses 1a and 1b.
• the H-shaped clamping frame 4 can be automatically tilted or pivoted by leaning on the back or pelvic area and so adjusted individually.
• the pivoting movement of the H-shaped clamping frame 4 relative to the outer chair back frame 1 is limited by the fact that the guide screws 10a and 10b abut against the stops of the radial longitudinal recesses 1a and 1b.
• the tension of the second surface covering 44 can be varied by turning the handwheels 6a and 6b.
• the second surface covering 44 When pulling apart the clamping frame legs 41 and 42, accordingly, the second surface covering 44 is tensioned, so that it presents a greater resistance to the seated person. If the handwheels 6a and 6b are operated in respectively opposite directions, the second surface covering 44 can be loosened so that the seated person is given less lumbar resistance. In this case, the highly convex shaped clamping frame cross-connection 43 is resiliently pressed together or apart. According to the invention, the first surface covering 15 of the upper back region and the second surface covering 44 of the lumbar region are designed as flexible coverings.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)
• Chairs Characterized By Structure (AREA)
• Superconductors And Manufacturing Methods Therefor (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=37896785

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (2)

Family Cites Families (11)

• 2006
  • 2006-10-16 DE DE202006015822U patent/DE202006015822U1/de not_active Expired - Lifetime
• 2007
  • 2007-10-10 US US12/311,879 patent/US20100117421A1/en not_active Abandoned
  • 2007-10-10 DE DE502007005985T patent/DE502007005985D1/de active Active
  • 2007-10-10 EP EP07870197A patent/EP2079344B1/fr not_active Not-in-force
  • 2007-10-10 AT AT07870197T patent/ATE491370T1/de active
  • 2007-10-10 WO PCT/DE2007/075008 patent/WO2008064673A1/fr not_active Ceased
  • 2007-10-10 DE DE112007003142T patent/DE112007003142A5/de not_active Ceased
  • 2007-10-15 TW TW096138448A patent/TW200836672A/zh unknown

Non-Patent Citations (1)

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