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
  • A47C7/448—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
• • 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
  • A47C7/405—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
  • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
  • A47C7/441—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity
• • 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

Definitions

• the invention relates to a backrest for a chair or chair with two laterally juxtaposed, resiliently held backrests, each of which is attached to a separate support member.
• each back support is attached to a separate support member.
• the support members are V-shaped to each other, and the lower ends of these support members are attached to the rear end of the seat on the chair frame.
• the backrests have some flexibility due to the resilient properties of the two support members to adapt to different seating positions of a seated person, it has been shown that this construction is unable, the spine of a seated person both during prolonged sitting in itself changing seat positions, as well as to greatly relieve the individual persons in greatly varying physique.
• the invention has for its object to design a backrest for a seat or armchair so that the seated person is optimally supported in a variety of seating positions in the area of the back or the spine.
• each support member forms the first leg of a substantially L-shaped support
• the second leg of each carrier is pivotable below the chair or armchair seat against spring force about a horizontal axis.
• the carriers are connected to one another by a guide rod oriented essentially perpendicular to the carriers in the rest position mounted in or on a seat substructure and connected to the carrier, that when moving a back support forward or backward, the other back support is displaced in opposite directions, to avoid a "jump" between the two back supports this preferably resiliently to the Straps are attached, such that there is a substantially uniform, stepless backrest.
• the guide rod is preferably articulated with its ends to the carriers and also mounted between their articulation points on the carriers hinged to the seat or the seat base.
• Figure 1 shows a view of a backrest which is attached to a stand of an otherwise not shown armchair or chair.
• Figure 2 shows a view of a modified embodiment of a backrest
• FIG. 3 shows a view of a further modified embodiment of a
• FIG. 4 shows an embodiment of the manner of attaching a back support to its support member
• FIG. 5 shows an exploded view of the embodiment according to FIG. 4;
• Figure 6 shows an embodiment of the manner of attachment of the
• Figure 7 shows an isometric view of a chair
• Figure 8 is a fragmentary isometric view of the column stand of the chair with attached seat chassis to which the backrest supports are pivotally mounted;
• Figure 9 is an isometric view of a top view of a seat base attached to the seat chassis
• FIG. 10 shows a schematic for explaining the principle according to the invention
• FIG. 7 shows an isometric view of an armchair comprising a base 1.1 equipped with rollers, a column 1 supported by the base, a seat 100 and a backrest 3 with two laterally spaced back supports 3.1, which are attached to L-shaped straps 4 are attached, which consist of a substantially vertically oriented support member 4.1 and a substantially horizontally oriented support member 4.2.
• Each back support 3.1 is attached to a support member 7 which is lockable along the associated support member 4.1 in different height positions.
• Each support member 7 includes rubber members, such that the single back support is movable relative to the support member 4.1.
• the support members 4.1 are interconnected by an elastically deformable cross member 9, the spring stiffness is designed so that the free mobility of the individual back support is maintained relative to the other back support to a limited extent.
• the support members 4.2 are pivotally mounted about a horizontal pivot axis 5 by means of a support unit 2.
• the supporting parts 4.2 of the carrier 4 are designed as two-armed lever, acting on the free lever ends 4.3 a substantially vertically aligned spring element 6, the force acting on the carrier force is variable.
• This spring element 6 may be a tension spring, a pneumatic or hydraulic spring element or the like.
• the back braces 3.1 are connected approximately at their center by means of an elastically deformable crossbar 3.2, whose strength is designed so that the back braces 3.1 keep their function as individual supports, the free mobility of a back support relative to the other back support to a limited extent preserved.
• the two back supports 3.1 are likewise fastened individually on their own holding parts 4.1 of carriers 4, each by themselves.
• the support members 7 are designed so that the upper ends of the support members 4.1 project upwardly beyond the support members 7.
• the free ends of the holding parts 4.1 are interconnected by an elastically deformable cross member 9.
• FIG. 6 shows a modified embodiment of the pivotable about a horizontal axis carrier.
• horizontal shaft 20 is mounted on which the second leg 4.2 of the carrier 4 are pivotally mounted.
• Each leg 4.2 is designed as a two-armed lever, the free lever end 4.4 is bent upwards, on which a substantially horizontally oriented tension spring 22 engages.
• the tension springs 22 are fixed with their ends on a variable relative to the horizontal axis at different distances detectable adjusting member 23 for varying the force acting on the carrier force, the e.g. a nut 24 carries, in which a rotatable by means of a knurled wheel 26 threaded pin 25 engages.
• Each leg 4.2 carries in the region of its bearing on the shaft 20 a threaded bushing 27, such that by turning the shaft 20 due to the opposing threaded portions of this shaft, the two legs 4.2 can be laterally adjusted relative to each other, whereby the distance between the back supports 3.1 in accordance Figures 1 and 3 can be adjusted.
• FIG. 8 and 9 show a detail of a fixed at the upper end of the stand column 1 seat chassis 38 to which the two supports 4 in the region of the free ends of the support members 4.2 are pivotally mounted about the pivot axis 39 shown schematically.
• a substantially box-shaped seat base 40 is fixed, for example by means of screws 41 which are guided in slots 42, such that the seat base 40 relative to the seat frame 38 is displaceable forward and backward.
• a core idea of this teaching according to the invention consists essentially in coupling the two backrests 3.1 with one another in such a way that, when the person sitting on the chair (chair) is displaced, a displacement of the backrest, e.g. to the rear inevitably has a movement of the other back support forward. Due to the resilient suspension of the back supports on the straps 4, the two back braces 3.1 are able to assume such a position that a substantially uniform, continuous backrest is created when the user of the chair or armchair when leaning back more against the one In Figure 9 right backrest 3.1 shown leaning or stronger presses against this as against the other back support 3.1.
• This positive coupling of the two back supports 3.1 to oppositely directed movements is effected by means of a in the rest position substantially perpendicular to the straps 4 guide rod 43, which is mounted in such or in the seat base 40 and connected to the support members 4.2, that at a backward movement of a back support 3.1 the other back support in the opposite direction, ie moved to the front, is.
• the deflection angle of the guide rod 43 is shown with respect to the center position to illustrate the principle oversubscribed; In reality, the deflection angle is only very small, so that when pivoting the ends of the guide rod 43 perform only very small movements, which are in the range of tenths of a millimeter and are thus absorbed by the tolerance play of the construction.
• the ends of the guide rod 43 are articulated to the respective support parts 4.2, for example by means of ball joints 44 shown schematically in FIG. 8b, which are preferably mounted in elastically deformable sleeves 44.1.
• the guide rod 43 is also mounted in the middle between its articulation points on the support parts 4.2, preferably by means of the ball joint 45 shown in Figure 9a in or on a longitudinal member 40.2 of the seat base 50 articulated.
• the support members 4.2 are supported by means mounted in the seat base 40 helical compression springs 46 such that the two back braces 3.1 in the unloaded rest position the have the same distance from the seat base 40 and the guide rod 43 occupies a rest or middle position.
• the support members 4.2 are provided with upwardly directed lugs 47 on which the guide rod 43 is articulated.
• To the lugs 47 include pressure plates 48 which are supported by means of the frame 40.1 of the box-shaped seat base 40 guided plunger 49 on the helical compression springs 46 which are aligned perpendicular to the pivot axis 39 housed in the seat base 40.
• the helical compression springs 46 are supported on longitudinally displaceable blocks 50, which in turn are supported on cams 52 of a rotatable by means of the handle 53 camshaft 51 to change the biasing force of the spring 46 by turning the cam 52 can.
• the guide rod 43 is guided in the frame 40.1 of the seat base 40 in arcuate guide grooves 54 whose ideal axes are parallel to the pivot axis 39 of the carrier 4 and are curved relative to the front of the chair from top to back and down.
• the guide grooves 54 allow the tilting or pivoting movement of the guide rod 43 in the region of the ball joint 45, such that upon pivoting of the support member 4.2 to the rear of this support member is also pivoted down at the same time opposite movements of the opposite support member 4.2.
• Figure 8 shows a position of the two support members 4.2 in a central, substantially mutually parallel position when the two back rests 3.1 are either unloaded or evenly loaded.
• the guide rod 43 follows this rearward movement, which due to the articulated support of the guide rod 43 in or on the side rail 40.2 of the entire seat base 40 pulled back on the one hand and on the other hand at the same time is pivoted downwards or lowered in its rear region, in accordance with a seat storage with synchronous mechanism described in DE 299 08 599 Ul, which, as known, is not the subject of the present invention.
• a synchronous mechanism is used when pivoting the backrest forward or to pivot back and the seat according to a predetermined angular ratio.
• the rearward movement of the seat base 40 is against the force of compression springs 60 which are supported between a support plate 61 forming part of the seat chassis 38 and thus stationary, and a support surface 62 forming part of the movable seat base 40.
• Figures 4 and 5 show how the support member 7 is attached to a back support to allow pivotal movements of this back support 3.1 relative to the support member 7 both about a vertical axis and about a horizontal axis:
• a top and bottom open, box-shaped main body 10 is at its the support member 7 facing the end provided with two spaced preferably triangular wall sections 10.1, which have opposite Lageröffhungen 10.11.
• a horizontally oriented bearing bushing 11 is fixed, so that after passing through an axle pin 12 by the brought with the bearing bush 11 in the alignment position bearing openings 10.11 of the main body 10 is pivotally attached to the support member 7.
• a rubber buffer 14 is placed according to Figure 5, which is provided with a corresponding shape of the bearing bush 11 recess 14.1.
• the spring stiffness of the rubber buffer 14 is designed so that a controlled pivoting movement of the main body 10 around the defined by the axle 12 horizontal axis 2 allow.
• the main body 10 is provided on its side facing away from the retaining ring member 7 with an upper and lower bounded by wall sections 10.2 opening.
• the wall sections 10.2 are provided with Lageröffhungen 10.21.
• a fixable at the back of each back support 3.1 fastener 13 has a vertically oriented bearing bush 13.1, which carries a radially outwardly projecting partition 13.2. When the bearing bush 13.1 is brought into alignment with the Lageröffhungen 10.21, an axle pin 14.2 can be inserted through these Lageröffhungen 10.21 and the bearing bush 13.1, whereby the main body 10 is pivotally mounted about a vertical axis on the fastening element 13.

Priority Applications (7)

Applications Claiming Priority (3)

Publications (1)

Family

ID=41078738

Family Applications (1)

Country Status (12)

Cited By (2)

Families Citing this family (18)

Citations (5)

Family Cites Families (9)

• 2006
  • 2006-06-29 DE DE102006030018A patent/DE102006030018A1/de not_active Withdrawn
• 2007
  • 2007-05-26 CN CN2007800242193A patent/CN101478895B/zh not_active Expired - Fee Related
  • 2007-05-26 WO PCT/DE2007/000954 patent/WO2008000207A1/de active Application Filing
  • 2007-05-26 KR KR1020097001471A patent/KR20090034352A/ko not_active Application Discontinuation
  • 2007-05-26 AT AT07722472T patent/ATE516726T1/de active
  • 2007-05-26 CA CA2724761A patent/CA2724761A1/en not_active Abandoned
  • 2007-05-26 AU AU2007264236A patent/AU2007264236A1/en not_active Abandoned
  • 2007-05-26 RU RU2009102813/12A patent/RU2009102813A/ru unknown
  • 2007-05-26 EP EP07722472A patent/EP2040582B1/de not_active Not-in-force
  • 2007-05-26 US US12/306,738 patent/US20100301652A1/en not_active Abandoned
  • 2007-05-26 CA CA002653912A patent/CA2653912A1/en not_active Abandoned
  • 2007-05-26 JP JP2009516867A patent/JP2009540970A/ja active Pending
  • 2007-05-26 ES ES07722472T patent/ES2367869T3/es active Active
  • 2007-05-26 DE DE202007007524U patent/DE202007007524U1/de not_active Expired - Lifetime

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