EP0797399B1 - Resilient curve element of plastics material with longitudinal and transverse struts for a lordosis support with adjustable curvature - Google Patents

Resilient curve element of plastics material with longitudinal and transverse struts for a lordosis support with adjustable curvature Download PDF

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Publication number
EP0797399B1
EP0797399B1 EP95942156A EP95942156A EP0797399B1 EP 0797399 B1 EP0797399 B1 EP 0797399B1 EP 95942156 A EP95942156 A EP 95942156A EP 95942156 A EP95942156 A EP 95942156A EP 0797399 B1 EP0797399 B1 EP 0797399B1
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EP
European Patent Office
Prior art keywords
curving element
element according
curving
housing
draw tape
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.)
Expired - Lifetime
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EP95942156A
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German (de)
French (fr)
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EP0797399A1 (en
Inventor
Knud Dr. Klingler
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Klingler Knud
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Individual
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    • 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
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support 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

Definitions

  • the invention relates to an elastic bulge element Plastic with longitudinal and cross struts for one arch-adjustable lumbar support with a drawstring, one end of which has a fastener the arch element and its other end with one Eccentric device for adjusting the curvature of the Arch elements is connected.
  • Such a bulge element is from DE-C1-43 20 105 known.
  • the bulge element known from this requires with regard to its connection with the adjusting device additional parts and a considerable assembly effort.
  • the object of the invention is a bulging element for a Lumbar support to improve it on that simple type inexpensive to produce and with one can be assembled with little effort.
  • Another job the invention is a simple and fast type in a frame or part of a backrest frame without attaching tools.
  • the arch element 1 consists of a frame with cross struts 2 and longitudinal struts 3. In the embodiment are next to a central strut 4 on both sides parallel to it two further longitudinal struts 3 arranged with these connecting cross struts 2 form a central framework that as a whole by means of the longitudinal struts 3, 4 by one horizontal axis is archable.
  • the cross struts 2 protrude this central scaffold on both sides and can under be arranged at an angle to a side To ensure support.
  • the arch element 1 exists preferably completely made of a plastic, but also reinforcing inserts made of any material, e.g. B. a metal, and / or stiffening ribs can. To save weight and / or the Bending properties and stability and rigidity too influence, recesses 5 may be provided. At the a lower end 6 of the bulge element 1 is a single piece executed with the arch element 1.
  • the approach 6 is part of a Housing 7 for receiving and storing a Adjustment device.
  • the adjustment device contains one in the housing 7 rotatable disc 8 with a Eccentric cam 9, the disc 8 with one not helical gear shown is firmly connected or is made in one piece with it, which with an im Housing 7 mounted screw (not shown) in Engagement is, the snail has an extension 10 is rotatably connected to a handwheel 11.
  • the Handwheel 11 By means of the Handwheel 11, the worm is rotated, which makes it with it engaged gear and thus the disc 8 with the eccentric cam 9 is also rotated.
  • the housing 7 consists of the approach 6 and a corresponding closing part 12, the outline of which in Fig. 1 is shown partially in dashed lines.
  • the Approach 6 and the closing part 12 have projections or depressions 13, 13 ', as indicated for example in Fig. 2 are as guides and / or snap connections to Merging and holding approach 6 and locking part 12 serve for the closed housing 7 as soon as the disc 8 with the eccentric cam 9 and the helical gear as well as the screw with the extension 10 and the handwheel 11 in the corresponding recesses or recesses in Approach 6 and inserted in the locking part 12.
  • the Projections and depressions 13 ' can each be so be carried out that the strength of the approach 6 and the Locking part 12 correspond so that the free end of the Projection, e.g. B. by ultrasound, at the exit of continuous open recess can be welded.
  • Approach 6 and locking part 12 can also only have aligned holes (not shown) that by means of suitable rivet or screw connections can be connected.
  • the closing part 12 can also be used as a hinge Material thinning in one piece with the approach 6 des Be bulging elements 1 produced. To close the housing 7 then only needs the closing part 12 through 180 ° pivoted and to be firmly connected to the approach 6.
  • bridges 14 On the back of the arch element 1 on the central strut 4, preferably in the area of the cross struts 2, are bridges 14 arranged to receive and guide a drawstring 15th to serve.
  • the tension band 15 is preferably in the sense of a Leaf spring is flexible and can be made from one Metal but also from a plastic or other flexible materials exist.
  • Around the bridges 14 in one piece with the arch element 1 in the casting or The central strut has the ability to produce pressing processes 4 14 windows in the area where the bridges are arranged 16 on.
  • a fastening element 17 for the drawstring 15 is arranged.
  • this is the case Fastening element 17 from a locking projection 18 with a to the approach 6 directed sliding ramp 19.
  • the drawstring 15 has a latching opening 20, the size of which is designed in this way is that the locking projection 18 and the sliding ramp 19 from it can be included.
  • the drawstring 15 contains the Locking opening 20 opposite end a locking hole 21, whose diameter is chosen so that it is free of play or with little play the eccentric cam 8, the Allowing rotation, can take up.
  • the bridges 14 point in the direction of the approach 6 a decreasing headroom for the fastening element 17 on.
  • increases 22 can be provided be preferably the headroom to the starch restrict the drawstring 15.
  • the curvature characteristic can be set, e.g. B. a radius of curvature that varies over the height.
  • the radius of curvature can also be determined by the distances between the bridges 14 can be varied from one another. By varying the Distance between locking opening 20 and locking hole 21 in Tension band 15 can pre-tension the arch element 1 be determined.
  • a variant, not shown, of fastening the Drawstring 15 at the top of the bulge 1 can be like looks like this.
  • the fastener 17 consists of this variant from a cross slot in the central strut 4 and the drawstring 15 has one at the upper end 23 hook-shaped turn, which is suitable in the Cross slot.
  • the attachment can also for example by a rivet or screw connection or a snap ring.
  • a fastener for tool-free arrangement of the Arch elements 1 are provided in bearing parts 24 (see FIG. 4), the directly on the frame or indirectly on an additional Frame part of a backrest are attached.
  • the Fastening element is preferably a round pin 25 executed, the central part is exposed in the housing 7 and the ends of which protrude from the housing 7 (see FIG. 1).
  • 4 is a view of an embodiment of a Round pin 25 shown in the leaf plane of FIG. 1. From this it can be seen that the middle part and the exposed ends have flats 26, the Flattenings 26 from each other at the middle part and at the ends are offset by 180 °.
  • the bearing parts 24 are approximately designed hook-shaped, and have a clear distance of her hook parts when transported into a plane are, from each other, exactly the strength of the round pin 25 minus the thickness of the flats 26 at one end and corresponds to the middle part.
  • This clear width can, for. B. with a round pin 25 with a diameter of 5 mm and respective flats from 1 to 3 mm.
  • the bearing parts are at a distance of equal to or slightly larger than the diameter of the Round pin 25 is.
  • the round pin 25 can in other embodiments have no flattening and in suitable holder z. B. U-holder with resilient legs or elastic pivotable cap-like holder to enclose the ends of the round pin can be used (all not shown).
  • the arch element 1 can also be fastening and / or Guide elements for tool-free arrangement Frame parts e.g. B. on rods z. B. in the form of clips exhibit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Description

Die Erfindung betrifft ein elastisches Wölbelement aus Kunststoff mit Längs- und Querstreben für eine wölbungsverstellbare Lordosenstütze mit einem Zugband, dessen eines Ende mittels eines Befestigungselements mit dem Wölbelement und dessen anderes Ende mit einer Exzentervorrichtung zur Verstellung der Wölbung des Wölbelements verbunden ist.The invention relates to an elastic bulge element Plastic with longitudinal and cross struts for one arch-adjustable lumbar support with a drawstring, one end of which has a fastener the arch element and its other end with one Eccentric device for adjusting the curvature of the Arch elements is connected.

Ein derartige Wölbelemente ist aus der DE-C1-43 20 105 bekannt. Das hieraus bekannte Wölbelement erfordert hinsichtlich seiner Verbindung mit der Verstellvorrichtung zusätzliche Teile und einen erheblichen Montageaufwand.Such a bulge element is from DE-C1-43 20 105 known. The bulge element known from this requires with regard to its connection with the adjusting device additional parts and a considerable assembly effort.

Aufgabe der Erfindung ist es, ein Wölbelement für eine Lordosenstütze dahingehend zu verbessern, daß es auf einfache Art kostengünstig herstellbar und mit einem geringen Aufwand zusammenbaubar ist. Eine weitere Aufgabe der Erfindung ist es, ein Wölbelement auf einfache und schnelle Art in einem Rahmen oder Rahmenteil einer Lehne ohne Werkzeuge zu befestigen.The object of the invention is a bulging element for a Lumbar support to improve it on that simple type inexpensive to produce and with one can be assembled with little effort. Another job the invention is a simple and fast type in a frame or part of a backrest frame without attaching tools.

Die erstgenannte Aufgabe wird durch ein Wölbelement mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen.The first-mentioned task is performed by a bulge element with the Features of claim 1 solved. Beneficial Embodiments of the invention are in the subclaims remove.

Nachstehend wird die Erfindung an einem Ausführungsbeispiel unter Bezug auf Zeichnungen näher erläutert. Es zeigt:

Fig. 1
eine Draufsicht auf ein erfindungsgemäßes Wölbelement,
Fig. 2
einen Querschnitt durch das Wölbelement gemäß Fig. 1,
Fig. 3
ein Zugband,
Fig. 4
einen Ausschnitt eines Rundzapfens mit sich gegenüberliegenden Abflachungen im Mittelteil und an den freiliegenden Ende.
The invention is explained in more detail using an exemplary embodiment with reference to drawings. It shows:
Fig. 1
a plan view of an arch element according to the invention,
Fig. 2
2 shows a cross section through the arch element according to FIG. 1,
Fig. 3
a drawstring,
Fig. 4
a section of a round spigot with opposing flats in the middle part and at the exposed end.

Das Wölbelement 1 besteht aus einem Gerippe mit Querstreben 2 und Längsstreben 3. Im Ausführungsbeispiel sind neben einer Zentralstrebe 4 beidseitig parallel zu ihr zwei weitere Längsstreben 3 angeordnet, die mit den diese verbindenden Querstreben 2 ein Zentralgerüst bilden, das als Ganzes mittels der Längsstreben 3, 4 um eine horizontale Achse wölbbar ist. Die Querstreben 2 ragen über dieses Zentralgerüst beidseitig hinaus und können unter einem Winkel zu ihm angeordnet sein, um eine seitliche Abstützung zu gewährleisten. Das Wölbelement 1 besteht vorzugsweise vollständig aus einem Kunststoff, wobei aber auch Verstärkungseinlagen aus beliebigem Material, z. B. einem Metall, und/oder Versteifungrippen vorgesehen sein können. Um Gewicht zu sparen und/oder die Biegeeigenschaften und Stabilität und Steifigkeit zu beeinflussen, können Aussparungen 5 vorgesehen sein. Am unteren Ende des Wölbelements 1 ist ein Ansatz 6 einstückig mit dem Wölbelement 1 ausgeführt.The arch element 1 consists of a frame with cross struts 2 and longitudinal struts 3. In the embodiment are next to a central strut 4 on both sides parallel to it two further longitudinal struts 3 arranged with these connecting cross struts 2 form a central framework that as a whole by means of the longitudinal struts 3, 4 by one horizontal axis is archable. The cross struts 2 protrude this central scaffold on both sides and can under be arranged at an angle to a side To ensure support. The arch element 1 exists preferably completely made of a plastic, but also reinforcing inserts made of any material, e.g. B. a metal, and / or stiffening ribs can. To save weight and / or the Bending properties and stability and rigidity too influence, recesses 5 may be provided. At the a lower end 6 of the bulge element 1 is a single piece executed with the arch element 1.

Im Ausführungsbeispiel ist der Ansatz 6 ein Teil eines Gehäuses 7 zur Aufnahme und Lagerung einer Verstellvorrichtung. Die Verstellvorrichtung enthält eine im Gehäuse 7 lagerbare drehbare Scheibe 8 mit einem Exzenternocken 9, wobei die Scheibe 8 mit einem nicht dargestellten schrägverzahnten Zahnrad fest verbunden ist oder einstückig mit ihm hergestellt ist, das mit einer im Gehäuse 7 gelagerten Schnecke (nicht dargestellt) in Eingriff steht, wobei die Schnecke über eine Verlängerung 10 drehfest mit einem Handrad 11 verbunden ist. Mittels des Handrads 11 wird die Schnecke gedreht, wodurch das mit ihr in Eingriff stehende Zahnrad und damit die Scheibe 8 mit dem Exzenternocken 9 ebenfalls gedreht wird.In the exemplary embodiment, the approach 6 is part of a Housing 7 for receiving and storing a Adjustment device. The adjustment device contains one in the housing 7 rotatable disc 8 with a Eccentric cam 9, the disc 8 with one not helical gear shown is firmly connected or is made in one piece with it, which with an im Housing 7 mounted screw (not shown) in Engagement is, the snail has an extension 10 is rotatably connected to a handwheel 11. By means of the Handwheel 11, the worm is rotated, which makes it with it engaged gear and thus the disc 8 with the eccentric cam 9 is also rotated.

Im Ausführungsbeispiel besteht das Gehäuse 7 aus dem Ansatz 6 und einem entsprechenden Schließteil 12, dessen Umriß in Fig. 1 teilweise strichliert dargestellt ist. Der Ansatz 6 und der Schließteil 12 weisen Vorsprünge bzw. Vertiefungen 13, 13' auf, wie sie beispielsweise in Fig. 2 angedeutet sind, die als Führungen und/oder Schnappverbindungen zum Zusammenführen und -halten von Ansatz 6 und Schließteil 12 zum geschlossenen Gehäuse 7 dienen, sobald die Scheibe 8 mit dem Exzenternocken 9 und dem schrägverzahnten Zahnrad sowie die Schnecke mit der Verlängerung 10 und dem Handrad 11 in die entsprechenden Vertiefungen bzw. Aussparungen im Ansatz 6 und im Schließteil 12 eingelegt sind. Die Vorsprünge und Vertiefungen 13' können jeweils so ausgeführt sein, daß sie der Stärke des Ansatzes 6 bzw. des Schließteils 12 entsprechen, so daß das freie Ende des Vorsprunges, z. B. durch Ultraschall, am Ausgang der durchgehenden offenen Vertiefung verschweißt werden kann. Ansatz 6 und Schließteil 12 können auch lediglich fluchtende Bohrungen (nicht dargestellt) aufweisen, die mittels geeigneter Niet- oder Schraubverbindungen fest miteinander verbunden werden können.In the embodiment, the housing 7 consists of the approach 6 and a corresponding closing part 12, the outline of which in Fig. 1 is shown partially in dashed lines. The Approach 6 and the closing part 12 have projections or depressions 13, 13 ', as indicated for example in Fig. 2 are as guides and / or snap connections to Merging and holding approach 6 and locking part 12 serve for the closed housing 7 as soon as the disc 8 with the eccentric cam 9 and the helical gear as well as the screw with the extension 10 and the handwheel 11 in the corresponding recesses or recesses in Approach 6 and inserted in the locking part 12. The Projections and depressions 13 'can each be so be carried out that the strength of the approach 6 and the Locking part 12 correspond so that the free end of the Projection, e.g. B. by ultrasound, at the exit of continuous open recess can be welded. Approach 6 and locking part 12 can also only have aligned holes (not shown) that by means of suitable rivet or screw connections can be connected.

Der Schließteil 12 kann auch über eine als Gelenk dienende Materialverdünnung einstückig mit dem Ansatz 6 des Wölbelements 1 hergestellt sein. Zum Schließen des Gehäuses 7 braucht dann lediglich das Schließteil 12 um 180° verschwenkt und mit dem Ansatz 6 fest verbunden zu werden.The closing part 12 can also be used as a hinge Material thinning in one piece with the approach 6 des Be bulging elements 1 produced. To close the housing 7 then only needs the closing part 12 through 180 ° pivoted and to be firmly connected to the approach 6.

Auf der Rückseite des Wölbelements 1 auf der Zentralstrebe 4 vorzugsweise im Bereich der Querstreben 2 sind Brücken 14 angeordnet, die zur Aufnahme und Führung eines Zugbandes 15 dienen. Vorzugsweise ist das Zugband 15 im Sinne einer Blattfeder biegeelastisch ausgeführt und kann aus einem Metall aber auch aus einen Kunststoff oder anderen biegeelastischen Materialien bestehen. Um die Brücken 14 einstückig mit dem Wölbelement 1 im Gieß- oder Preßverfahren herstellen zu können, weist die Zentralstrebe 4 im Bereich der Anordnungsstellen der Brücken 14 Fenster 16 auf.On the back of the arch element 1 on the central strut 4, preferably in the area of the cross struts 2, are bridges 14 arranged to receive and guide a drawstring 15th to serve. The tension band 15 is preferably in the sense of a Leaf spring is flexible and can be made from one Metal but also from a plastic or other flexible materials exist. Around the bridges 14 in one piece with the arch element 1 in the casting or The central strut has the ability to produce pressing processes 4 14 windows in the area where the bridges are arranged 16 on.

Am oberen Ende des Wölbelements 1 in Verlängerung der zentralen Achse der Brücken 14 ist auf der Zentralstrebe 4 ein Befestigungselement 17 für das Zugband 15 angeordnet. Im dargestellten Ausführungsbeispiel besteht das Befestigungselement 17 aus einem Rastvorsprung 18 mit einer zum Ansatz 6 gerichteten Gleitrampe 19. Das Zugband 15 weist eine Rastöffnung 20 auf, deren Größe so gestaltet ist, daß der Rastvorsprung 18 und die Gleitrampe 19 von ihr umfaßt werden können. Das Zugband 15 enthält an dem der Rastöffnung 20 gegenüberliegenden Ende eine Rastbohrung 21, deren Durchmesser derart gewählt ist, daß sie spielfrei oder mit geringem Spiel den Exzenternocken 8, dessen Drehung ermöglichend, aufnehmen kann.At the top of the arch element 1 in extension of the The central axis of the bridges 14 is on the central strut 4 a fastening element 17 for the drawstring 15 is arranged. In the illustrated embodiment, this is the case Fastening element 17 from a locking projection 18 with a to the approach 6 directed sliding ramp 19. the drawstring 15 has a latching opening 20, the size of which is designed in this way is that the locking projection 18 and the sliding ramp 19 from it can be included. The drawstring 15 contains the Locking opening 20 opposite end a locking hole 21, whose diameter is chosen so that it is free of play or with little play the eccentric cam 8, the Allowing rotation, can take up.

Die Brücken 14 weisen ausgehend vom Ansatz 6 in Richtung zum Befestigungselement 17 eine abnehmende Durchgangshöhe auf. Auf der Zentralstrebe 4, benachbart zu den Brücken 14 - vorzugsweise zu allen -, können Erhöhungen 22 vorgesehen sein, die vorzugsweise die Durchgangshöhe auf die Stärke des Zugbandes 15 beschränken. Durch die Wahl der Durchgangshöhe und/oder der Anzahl und Höhe der Erhöhungen kann die Wölbungscharakteristik eingestellt werden, z. B. ein über die Höhe unterschiedlicher Krümmungsradius. Der Krümmungsradius kann auch durch die Abstände der Brücken 14 voneinander variiert werden. Durch das Variieren des Abstandes zwischen Rastöffnung 20 und Rastbohrung 21 im Zugband 15 kann die Vorspannung des Wölbelementes 1 bestimmt werden. The bridges 14 point in the direction of the approach 6 a decreasing headroom for the fastening element 17 on. On the central strut 4, adjacent to the bridges 14 - Preferably to all -, increases 22 can be provided be preferably the headroom to the starch restrict the drawstring 15. By choosing the Headroom and / or the number and amount of increases the curvature characteristic can be set, e.g. B. a radius of curvature that varies over the height. Of the The radius of curvature can also be determined by the distances between the bridges 14 can be varied from one another. By varying the Distance between locking opening 20 and locking hole 21 in Tension band 15 can pre-tension the arch element 1 be determined.

Eine nicht dargestellte Variante der Befestigung des Zugbandes 15 am oberen Ende des Wölbelements 1 kann wie folgt aussehen. Das Befestigungselement 17 besteht bei dieser Variante aus einem Querschlitz in der Zentralstrebe 4 und das Zugband 15 weist am oberen Ende 23 eine hakenförmige Abbiegung auf, die geeignet ist, in den Querschlitz einzugehen.A variant, not shown, of fastening the Drawstring 15 at the top of the bulge 1 can be like looks like this. The fastener 17 consists of this variant from a cross slot in the central strut 4 and the drawstring 15 has one at the upper end 23 hook-shaped turn, which is suitable in the Cross slot.

Wenn die Verstellvorrichtung in das Gehäuse 7 eingelegt und dieses geschlossen ist, wird vom Ansatz 6 her unter den Brücken 14 und gegebenenfalls über die Erhöhung 22 das Zugband 15 mit der Rastöffnung 20 nach vorne eingeschoben. Dabei gerät das vordere Ende 23 des Zugbandes 15 auf die Gleitrampe 19 und seine Rastöffnung 20 rastet, da das Zugbandende 23 durch die Rampensteigung vorgespannt wird, hinter dem Rastvorsprung 18 ein, wenn die Rastöffnung 20 über das freie Ende des Rastvorsprungs 18 gleitet. Gegebenenfalls unter geringer manueller Wölbung des Wölbelements 1 wird nun die Rastbohrung 21 über dem Exzenternocken 9 positioniert. Durch die durch die Durchgangshöhe des banachbarten Paares Brücke 14 und Erhöhung 22 bedingte Vorspannung des Endes des Zugbandes 15 mit der Rastöffnung 20 gleitet diese auf dem Exzenternocken 9 bis sie - eine relative Drehung zwischen dem Nocken 9 und dem Zugband 15 zulassend - am Boden des Exzenternockens auf der Scheibe 8 anliegt. Damit besteht eine feste Verbindung des Zugbandes 15 mit der Exzentervorrichtung, ohne daß ein Werkzeug erforderlich ist. Die Befestigung kann aber auch beispielsweise durch eine Niet- oder Schraubverbindung oder einen Sprengring erfolgen.When the adjustment device is inserted into the housing 7 and this is closed, is from approach 6 under the Bridges 14 and possibly the elevation 22 that Drawstring 15 inserted with the locking opening 20 to the front. The front end 23 of the drawstring 15 gets on the Sliding ramp 19 and its locking opening 20 snaps, since that Tension band end 23 is biased by the ramp slope, behind the locking projection 18 when the locking opening 20th slides over the free end of the locking projection 18. If necessary with slight manual curvature of the Arch elements 1 is now the locking hole 21 above Eccentric cam 9 positioned. Through the through the Headroom of the adjacent pair of bridge 14 and Raised 22 prestressing the end of the drawstring 15 with the latch opening 20, it slides on the eccentric cam 9 to them - a relative rotation between the cam 9 and allowing the drawstring 15 - on the bottom of the eccentric cam the disc 8 abuts. So there is a firm connection the drawstring 15 with the eccentric device without a Tool is required. The attachment can also for example by a rivet or screw connection or a snap ring.

An unteren Ende des Gehäuses 7 ist im Ausführungsbeispiel ein Befestigungselement zur werkzeugfreien Anordnung des Wölbelements 1 in Lagerteilen 24 (s. Fig. 4) vorgesehen, die direkt am Rahmen oder indirekt an einem zusätzlichen Rahmenteil einer Lehne befestigt sind. Das Befestigungselement ist vorzugsweise als Rundzapfen 25 ausgeführt, dessen Mittelteil im Gehäuse 7 freiliegt und dessen Enden aus dem Gehäuse 7 herausragen (siehe Fig. 1). In Fig. 4 ist eine Ansicht eines Ausführungsbeispiels eines Rundzapfens 25 in der Blattebene gemäß Fig. 1 dargestellt. Hieraus ist erkennbar, daß der Mittelteil und die freiliegenden Enden Abflachungen 26 aufweisen, wobei die Abflachungen 26 vom Mittelteil und an den Enden zueinander um 180° versetzt sind. Die Lagerteile 24 sind etwa hakenförmig gestaltet, und weisen einen lichten Abstand ihrer Hakenteile, wenn sie in eine Ebene transportiert sind, voneinander auf, der genau der Stärke des Rundzapfens 25 abzüglich der Stärke der Abflachungen 26 an einem Ende und am Mittelteil entspricht. Diese lichte Weite kann z. B. bei einem Rundzapfen 25 mit einem Durchmesser von 5 mm und jeweiligen Abflachungen von 1 bis 3 mm betragen. Unterhalb der Hakenteile weisen die Lagerteile einen Abstand auf, der gleich oder etwas größer als der Durchmesser des Rundzapfens 25 ist.At the lower end of the housing 7 is in the embodiment a fastener for tool-free arrangement of the Arch elements 1 are provided in bearing parts 24 (see FIG. 4), the directly on the frame or indirectly on an additional Frame part of a backrest are attached. The Fastening element is preferably a round pin 25 executed, the central part is exposed in the housing 7 and the ends of which protrude from the housing 7 (see FIG. 1). 4 is a view of an embodiment of a Round pin 25 shown in the leaf plane of FIG. 1. From this it can be seen that the middle part and the exposed ends have flats 26, the Flattenings 26 from each other at the middle part and at the ends are offset by 180 °. The bearing parts 24 are approximately designed hook-shaped, and have a clear distance of her hook parts when transported into a plane are, from each other, exactly the strength of the round pin 25 minus the thickness of the flats 26 at one end and corresponds to the middle part. This clear width can, for. B. with a round pin 25 with a diameter of 5 mm and respective flats from 1 to 3 mm. Below of the hook parts, the bearing parts are at a distance of equal to or slightly larger than the diameter of the Round pin 25 is.

In der in Fig. 4 dargestellten Position läßt sich somit der Rundzapfen 25 und damit das Wölbelement 1 zwischen die hakenförmigen Lagerteile 24 einführen, wonach es nach einer leichten Verschwenkung um die Achse des Rundzapfens 25 - um nur wenige Grad - wegen des dann wirksamen Durchmessers von 5 mm nicht mehr aus der Lagerung entfernt werden kann. Hierdurch ist eine äußerst schnelle und sichere Montage des Wölbelements an einem Rahmen oder Rahmenteil möglich.In the position shown in Fig. 4, the Round pin 25 and thus the arch element 1 between the Insert hook-shaped bearing parts 24, after which it is after a slight pivoting about the axis of the round pin 25 - um only a few degrees - because of the then effective diameter of 5 mm can no longer be removed from storage. This is an extremely quick and safe installation of the Arch elements possible on a frame or frame part.

Der Rundzapfen 25 kann in anderen Ausführungsbeispielen keine Abflachungen aufweisen und in geeignete Halter z. B. U-Halter mit federnden Schenkeln oder elastisch verschwenkbare kappenartige Halter zur Umfassung der Enden des Rundzapfens einsetzbar sein (alle nicht dargestellt). Das Wölbelement 1 kann weiter Befestigungs- und/oder Führungselemente zur werkzeugfreien Anordnung an Rahmenteilen z. B. an Rundstäben z. B. in Form von Clips aufweisen.The round pin 25 can in other embodiments have no flattening and in suitable holder z. B. U-holder with resilient legs or elastic pivotable cap-like holder to enclose the ends of the round pin can be used (all not shown). The arch element 1 can also be fastening and / or Guide elements for tool-free arrangement Frame parts e.g. B. on rods z. B. in the form of clips exhibit.

Claims (13)

  1. Elastic curving element (1) made of plastic with longitudinal and transverse struts (2, 3, 4) for a curve-adjustable lordosis support with a draw tape (15), one end (23) of which is connected by means of a fastening element (17) to the curving element (1) and other end of which is connected to a eccentric device for adjusting the curve of the curving element (1), characterised in that the curving element (1) comprises a shoulder (6) produced in one piece therewith which is part of a housing (7) for mounting and bearing the eccentric device, and in that guides for the draw tape (15) designed in one piece with the curving element (1) are in the form of bridges (14) over the central longitudinal strut (4) of the curving element (1), whereby the bridges (14) have varying clearance heights.
  2. Curving element according to Claim 1, characterised in that the clearance heights of the bridges (14) decrease in the direction from the shoulder (6) to the fastening element (17).
  3. Curving element according to Claim 1 or 2, characterised in that an elevation (22) on the central web (4) reducing the clearance height for the draw tape (15) is assigned to at least one bridge (14).
  4. Curving element according to Claim 3, characterised in that the clearance height delimited by the bridge (14) and the elevation (22) corresponds to the thickness of the draw tape (15).
  5. Curving element according to one of Claims 1 to 4, characterised in that the fastening element (17) comprises a locking projection (18) and a corresponding locking opening (20) on the curving element (1) or in the draw tape (15) respectively.
  6. Curving element according to Claim 5, characterised in that the locking projection (18) is manufactured in one piece with the curving element (1) and comprises a sliding ramp (19) directed towards the shoulder (6).
  7. Curving element according to Claim 5, characterised in that the locking projection is a bent hook-shaped part of the draw tape (15) which can be suspended in a locking opening formed in the central web (4).
  8. Curving element according to one of Claims 1 to 7, characterised in that the draw tape (15) comprises a locking bore (21) for mounting the eccentric cam (9).
  9. Curving element according to one of Claims 1 to 8, characterised in that the shoulder (6) is connected in addition via a thin section of material serving as a hinge to the pivotable closing part (12) of the housing (7).
  10. Curving element according to Claim 9, characterised in that the shoulder (6) and the closing part (12) of the housing (7) comprise corresponding guides in the form of projections and recesses (13) and/or snap connections.
  11. Curving element according to one of Claims 1 to 10, characterised in that it comprises fastening elements for tool-free arrangement on frame parts of a seat.
  12. Curving element according to Claim 11,. characterised in that a fastening element is a round pin (25) arranged in the housing (7), whereby parts thereof lie free and/or project out of the housing (7).
  13. Curving element according to Claim 12, characterised in that the round pin (25) in the freelying middle part and on the freelying projecting ends comprises flattened parts (26), whereby the flattened part in the middle part is offset by 180° to those in the free ends.
EP95942156A 1994-12-15 1995-12-14 Resilient curve element of plastics material with longitudinal and transverse struts for a lordosis support with adjustable curvature Expired - Lifetime EP0797399B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4444803A DE4444803C2 (en) 1994-12-15 1994-12-15 Elastic arch element made of plastic with longitudinal and cross struts for an arch-adjustable lumbar support
DE4444803 1994-12-15
PCT/EP1995/004947 WO1996018326A1 (en) 1994-12-15 1995-12-14 Resilient curve element of plastics material with longitudinal and transverse struts for a lordosis support with adjustable curvature

Publications (2)

Publication Number Publication Date
EP0797399A1 EP0797399A1 (en) 1997-10-01
EP0797399B1 true EP0797399B1 (en) 1998-11-11

Family

ID=6535951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95942156A Expired - Lifetime EP0797399B1 (en) 1994-12-15 1995-12-14 Resilient curve element of plastics material with longitudinal and transverse struts for a lordosis support with adjustable curvature

Country Status (5)

Country Link
US (1) US5934752A (en)
EP (1) EP0797399B1 (en)
JP (1) JP4012565B2 (en)
DE (2) DE4444803C2 (en)
WO (1) WO1996018326A1 (en)

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US6652029B2 (en) 2001-12-20 2003-11-25 L & P Property Management Company Unitized back plate and lumbar support
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US6666511B2 (en) 1989-08-04 2003-12-23 Schukra Geratebau Ag Arching mechanism and method of use
US6676214B2 (en) 2001-11-16 2004-01-13 L & P Property Management Company Method and apparatus for lumbar support with integrated actuator housing
US6758522B2 (en) 2001-03-29 2004-07-06 L&P Property Management Company Apparatus and method for varying coefficients of friction in a variable apex back support
US6779844B2 (en) 2001-12-14 2004-08-24 L&P Propety Maqnagement Company Arching lumbar support with weight distribution surface
US7690726B2 (en) 2005-01-12 2010-04-06 L&P Swiss Holding Company Coupling unit and adjusting mechanism using the coupling unit
US7775595B2 (en) 2004-02-06 2010-08-17 Schukra Of North America Drive mechanism
US7841661B2 (en) 2005-01-12 2010-11-30 L&P Swiss Holding Company Lumbar support assembly and corresponding seat structure
US7984949B2 (en) 2007-04-24 2011-07-26 Schukra Of North America Lumbar and bolster support for second row seat
US7984948B2 (en) 2004-07-30 2011-07-26 Schukra Of North America, Ltd. Modular contour support apparatus
US7997650B2 (en) 2008-02-22 2011-08-16 Schukra Of North America Constant pressure retreating lumbar system

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Publication number Priority date Publication date Assignee Title
US6666511B2 (en) 1989-08-04 2003-12-23 Schukra Geratebau Ag Arching mechanism and method of use
US6623076B2 (en) 1993-06-17 2003-09-23 Schukra-Gerätebau AG Adjustment apparatus for a resiliently flexible support element of a back rest
US6824214B2 (en) 2001-03-01 2004-11-30 L & P Property Management Company Universal ergonomic support with self-contained actuator
US6619739B2 (en) 2001-03-01 2003-09-16 L & P Property Management Company Universal ergonomic support with self-contained actuator
US6758522B2 (en) 2001-03-29 2004-07-06 L&P Property Management Company Apparatus and method for varying coefficients of friction in a variable apex back support
US6652028B2 (en) 2001-11-02 2003-11-25 L & P Property Management Apparatus and method for lumbar support with variable apex
US6676214B2 (en) 2001-11-16 2004-01-13 L & P Property Management Company Method and apparatus for lumbar support with integrated actuator housing
US6779844B2 (en) 2001-12-14 2004-08-24 L&P Propety Maqnagement Company Arching lumbar support with weight distribution surface
US6652029B2 (en) 2001-12-20 2003-11-25 L & P Property Management Company Unitized back plate and lumbar support
US7775595B2 (en) 2004-02-06 2010-08-17 Schukra Of North America Drive mechanism
US7984948B2 (en) 2004-07-30 2011-07-26 Schukra Of North America, Ltd. Modular contour support apparatus
US8382204B2 (en) 2004-07-30 2013-02-26 Schukra of North America Co. Modular contour support apparatus
US7690726B2 (en) 2005-01-12 2010-04-06 L&P Swiss Holding Company Coupling unit and adjusting mechanism using the coupling unit
US7841661B2 (en) 2005-01-12 2010-11-30 L&P Swiss Holding Company Lumbar support assembly and corresponding seat structure
US8544953B2 (en) 2005-01-12 2013-10-01 L&P Swiss Holding Ag Lumbar support assembly and corresponding seat structure
US7984949B2 (en) 2007-04-24 2011-07-26 Schukra Of North America Lumbar and bolster support for second row seat
US7997650B2 (en) 2008-02-22 2011-08-16 Schukra Of North America Constant pressure retreating lumbar system

Also Published As

Publication number Publication date
JP4012565B2 (en) 2007-11-21
US5934752A (en) 1999-08-10
DE4444803A1 (en) 1996-06-20
DE59504242D1 (en) 1998-12-17
WO1996018326A1 (en) 1996-06-20
JPH10510442A (en) 1998-10-13
DE4444803C2 (en) 1997-04-24
EP0797399A1 (en) 1997-10-01

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