WO2019156641A1 - Structure de support de siège réglable - Google Patents

Structure de support de siège réglable Download PDF

Info

Publication number
WO2019156641A1
WO2019156641A1 PCT/TH2018/000005 TH2018000005W WO2019156641A1 WO 2019156641 A1 WO2019156641 A1 WO 2019156641A1 TH 2018000005 W TH2018000005 W TH 2018000005W WO 2019156641 A1 WO2019156641 A1 WO 2019156641A1
Authority
WO
WIPO (PCT)
Prior art keywords
support structure
seat
seat pan
adjustable
backrest
Prior art date
Application number
PCT/TH2018/000005
Other languages
English (en)
Inventor
Klaus Jürgen KUMMER
Original Assignee
CHAICHANA, Suladda
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHAICHANA, Suladda filed Critical CHAICHANA, Suladda
Priority to PCT/TH2018/000005 priority Critical patent/WO2019156641A1/fr
Publication of WO2019156641A1 publication Critical patent/WO2019156641A1/fr

Links

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
    • 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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C9/00—Stools for specified purposes
    • A47C9/002—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects
    • A47C9/005—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects with forwardly inclined seat, e.g. with a knee-support
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C9/00—Stools for specified purposes
    • A47C9/02—Office stools not provided for in main groups A47C1/00, A47C3/00 or A47C7/00; Workshop stools
    • A47C9/025—Stools for standing or leaning against, e.g. in a semi-standing or half-seated position

Definitions

  • the present invention relates to an adjustable seat support structure or device that is used to support the weight of a person, in particular a seated person and especially to an adjustable support structure or device, that is adjustable so as to alter the seating or reclining position of a subject resting on the structure.
  • an adjustable seat support structure or device that is used to support the weight of a person, in particular a seated person and especially to an adjustable support structure or device, that is adjustable so as to alter the seating or reclining position of a subject resting on the structure.
  • Support structures for use in offices and other situations, which allow altering the seat height, seat inclination and reclining position of a subject are known, (Pat. US 93/05731, Pat. US7806478, Pat. US 2008/052208, Pat. US 2005/024213, Pat. US8944507).
  • many of the known forms of support structures suffer from some disadvantages, either by not acknowledging the current status of biomechanical science or focus only on some limited parts of the ergonomic implications of the seated person.
  • the current embodiment of the invention is primarily, but not exclusively, focused on an office chair application.
  • Office chairs are known to comprise at least five portions:
  • Portion (A) supports the upper portions (B, C, D & E), can be equipped with glides or swiveling wheels for mobility while seated and may contain a mechanical or pneumatic device to allow a height adjustment of the four upper portions.
  • Portions (B) and (C) form the heart and center of this invention and enable an articulated movement of a seated person from a forward leaning position to a backward relaxing position, which can be secured in infinite by the use of frictional mechanical and/or pneumatic means.
  • Portion (D) is attached to and follows the backrest so as to maintain a constant equal and proportional correct height for the lower arm of a seated person.
  • Portion (E) is configured to be pivotally hinged to portion (C) to allow for a reverse synchronized alteration of the backrest, e.g. lumbar support, with the imaginative pivotal fulcrum in the hip joint.
  • the backrest e.g. lumbar support
  • the present invention aims to provide a support structure, which recognizes and supports the current state of anthropological and biomechanical facts.
  • the current invention aims to allow and to encourage a‘seated’ person into shifting the seating position upward in a convenient and often - in an easy understandable and a self-explanatory way.
  • the present invention generally provides a support structure for supporting a person in a seated position, the support structure comprising:
  • a linear for- and upward or back- and downward moving apparatus to carry the weight of a person seated upon the support structure
  • a frame attached to the support structure to support the upper body portion, when leaning back (backrest), which may be connected in such a way, that it allows for angle variations of the seated person forward or backward through a synchronized movement;
  • the support structure is incorporated into a chair, in particular a work or office chair, on which the subject may recline backward or lean forward in a linear single movement, whereby the transverse pivotal axis is the knee joint as the reference fulcrum, meaning, while the upper thigh is evenly supported and in permanent contact with the seat pan surface in its entire length, the legs remain resting square on the floor.
  • the compulsory dynamic movement allows the seated person to maintain throughout the motion a torso-to-thigh angle larger than 90 degrees.
  • the incline of the seat pan is achieved and controlled by two pairs of transverse connected pivotally hinged levers directly under the seat pan, which force the seat pan to move on a compulsory hinged parallelogram with uneven legs to describe an imaginative curved path with the fulcrum in the knee joint.
  • a torso-to-thigh angle of 100 degrees or more can be maintained, the need to alter the angle ratio between seat and backrest may be less relevant, since the primary function of the backrest is to support the upper body or torso, when it tips backward over its balance point into a reclining position.
  • a backrest to seat angle adjustment can be incorporated through a compulsory synchronized movement with the seat pan movement.
  • the seat pan needs to be supported by means of a force to lift a weight. There are several options for this force available, such as leaf springs, coil springs or pneumatic gas springs.
  • the adjustable support structure When installed with a lifting force in the form of a coil or leaf spring, the adjustable support structure would be a floating device, meaning, that with a corresponding adjustment of the spring to the weight of the seated person, the adjustable support structure would allow to balance the seated body and use the body weight to move into a forward elevated posture or into a relaxed backward reclining posture in a compulsory singular‘floating’ movement without obstruction or effort.
  • the adjustable support structure must also comprise means for securing (locking) the structure in particular infinite angular positions.
  • the means of locking can be achieved in several ways, either by a serial clutch plate block, locked transversely through a cam lever or by a screw-clamping device.
  • the easiest means of locking the movement would be through a pneumatic gas spring with a lockable chamber valve.
  • the adjustable support structure would have only one releasable locking/detent means for the entire structure of the seat rest support and the arrest of the seat pan movement in anv inclination.
  • a second means of lever or other device would be provided for the height adjustment and detention of the means of the uplifting force in portion (A) of the current embodiment.
  • the limitations of the terminal positions of the backward and forward movement of the seat pan can be controlled by various means, either by limiting the movement of the weight lifting device through the length of the slots it moves in, or, in case of employing a gas spring, the length limitation of its stem movement.
  • the present embodiment is designed to accommodate the most common seating situations in the current office environment. It also provides a solution for the fast gaining recognition and importance, to employ height adjustable tables in the office working environment aimed to solve the back pain problems, by switching effortlessly between working in a low sitting position and an elevated high up working position with infinite positions in between.
  • the construction and movement of the present embodiment also offers to be applicable in many other situations, where a person needs an elevated seating support for various tasks, which traditionally can only be achieved with two or more different chairs.
  • Fig. 1 depicts a schematic view of an office chair construction in accordance with and comprising the present invention
  • Fig. 2 depicts a schematic view of the anatomic premise which the current embodiment is referring to and its modulations in 2.1, 2.2 and 2.3;
  • Fig. 3 depicts a schematic view of the current common situation of seat structures offered to the marked at present, showing the angles of a generally backward tilted position and a generally horizontal position;
  • Fig. 4 depict a schematic view of the objective, which the current embodiment is
  • Fig. 5 depicts a side view of the assembly of the support structure and its members referring to the assumptions of Fig. 2, Fig. & Fig. 4 in the lower relaxed reclining position;
  • Fig. 6 depicts a side view assembly of the support structure and its members and proportions as shown in Fig 5, but raised to the acute forward tilted position and the fulcrum reference point of the knee joint; it also describes the proportions of the articulation of the present embodiment and the fulcrum reference point of the knee joint;
  • Fig. 7 depicts the embodiment of the assembled apparatus of portion (B) in Fig. 1;
  • Fig. 8 depicts a section through the apparatus assembly shown in Fig. 7;
  • Fig. 9 depicts an isometric exploded view of the members of the in Fig.7 shown appara- tus assembly
  • Fig. 10 depicts the preferred embodiment of the apparatus as an assembly of portions B
  • C, D and E e.g. apparatus, seat pan, armrest and backrest as described in Fig. 1, in a lower reclined position;
  • Fig. 11 depicts the preferred embodiment of the apparatus as an assembly of portions (B),
  • Fig.l2 depicts the hinge arrangement between the apparatus (B) and the backrest (E) support lever, that controls the reverse synchronized movement of the backrest in relation to the seat pan in a reclined position;
  • Fig.13 depicts the hinge arrangement between the apparatus (B) and the backrest support lever, that controls the reverse synchronized movement of the backrest in relation to the seat pan in a forward tilting position;
  • Fig. 14 depicts the preferred embodiment of the present invention applied in an office chair in its most articulated positions.
  • Fig. 1 generally depicts an office chair and schematically represents a possible embodiment of the invention. As will be evident from viewing Fig. 1, the seating assembly generally corn- prises five elements:
  • the base A is structured as a classic 5 -prong rolling leg frame containing a telescopic column, which carries a gas cylinder, which can be adjusted in height in order to adapt to the specific requirements of each users height for such a seat support structure.
  • the structure A acts as a mount, upon which the structure B is supported.
  • the support structure B and the seat pan C which form the heart of this current invention and comprise a plurality of portions, which will be described in detail below.
  • Fig. 2, 2.1, 2.2, & 2.3 depict the biomechanical.background and explanation for the function of the current invention and describes part of the human skeleton, in particular the arrangement of the bone structure and movement around the hip joint.
  • Fig. 2 shows the bones attached to the hip joint and its relative angles when standing up and when sitting on a seat surface at a 90- degree angle. It is today a scientific established fact, that the maximum angle of movement be- tween hip bone and pelvis is 60 degrees, while the remaining 30 degrees take place in the lumbar part of the spine directly above the pelvis, the result of which is a conversion of the natural spine curve (lordosis) into the opposite curve (kyphosis).
  • Fig. 1 the maximum angle of movement be- tween hip bone and pelvis is 60 degrees, while the remaining 30 degrees take place in the lumbar part of the spine directly above the pelvis, the result of which is a conversion of the natural spine curve (lordosis) into the opposite curve (kyphosis).
  • Fig. 2.1 shows the so-called zero position, in which the natural spine curve is still maintained, while all muscles controlling the bending process, on the thigh, around the buttock and the lower back are in a relaxed state, neither tensed or depleted.
  • Fig. 2.2 shows the typical seat configuration achieved with the majority of seating de- vices available in the market.
  • Fig. 2.3 shows the actual configuration, when executing a task that requires a short distance between the eye and the object to be observed on a flat table, like in writing or drawing. In both cases the muscles of the lower back and the lower thigh muscles are increasingly tensed, while the upper thigh muscles are increasingly depleted.
  • Fig. 3 depicts the seating configuration and the corresponding torso-to-thigh angles of a traditional seating support structure in its most forward and most backward position and illustrates the effect of the limitation of seat support structures most commonly present in the market, whereas 3. a represents the pivotal location of the hip joint, the knee joint in 3.b and the pivotal point of the foot in joint 3.c, which remains stationary through the whole movement.
  • Fig. 4 depicts one of the claims and the aim of the current invention to modify the seating support structure in such a way, that a torso-to-thigh angle of 100 degrees or -more can be maintained throughout the entire elevation movement from the most lower back recline to the upper most forward incline.
  • Fig. 5 depicts a schematic illustration of the seating support structure and the portions in- volved to achieve the claimed angles and movements described above.
  • the portions generally take the form of levers or like structures. In the illustrated embodiment the portions shown are:
  • the various portions of the support structure are connected via hinge or pivot means, so as to define the support structure in a lower backward reclined position, whereas the uplifting force 3 is at its lower hinge point pivotally hinged to the bearing structure 2 in point 3.1 and at its upper end to the seat pan support in pivot point 3.2.
  • the upper forward pivotal hinged lever 5 is at its lower end hinged pivotal to the front of bearing base 2 in point 5.1 and at its upper end to the seat pan support 6 in point 5.2.
  • the lower backward pivotal hinged lever 4 is at its lower point pivotal hinged to the bearing base structure 2 in point 4.1 and at its upper pivotal point to the seat pan support 6 in point 3.2/4.2. Also illustrated is the alignment of the seat pan (C) with the knee joint fulcrum 3.b (Fig. 3) and the positional parallel alignment to the knee joint in the higher upward inclined position.
  • Fig. 6 shows the support structure moved into a desired second forward inclined position and how it enables the subject supported by the structure to be moved from a relative lower backward reclining position to an acute elevated forward seated position (and vice versa), or to any position along a continuum between those two extremities.
  • the range of movement between the first and any desired second position is controlled and limited solely by the extend of movement permissible of portion 3, the uplifting force device employed in accordance with the particular design of the support structure in use in any particular instance. It also illustrates the alignment of the seat pan (C) with the knee joint fulcrum 3.b (Fig. 3) and the positional parallel alignment to the knee joint in the higher upward inclined position.
  • Fig. 7 depicts the preferred embodiment of the apparatus assembly of portion (B) in Fig. 1, with its portions as described in Fig. 5 and Fig. 6. plus the additional portions of the release lever arrangements on each side for the seat height gas spring release lever 10 and the apparatus height lift lever 11.
  • Fig. 8 depicts an isometric section through the in Fig. 7 described apparatus assembly and its arrangement of the in Fig. 5 & 6 described portions and its referential hinge points in relation to each other.
  • Fig. 9 depicts an exploded isometric view of all portions comprising the apparatus assembly of portion (B) in Fig. 1 and described in Fig. 5, 6, 7 & 8.
  • Fig. 9 depicts the position of the release lever 8 with the hinge pin 8.1, the adjustment screw 8.2 for the release pin adjustment of the gas spring for the height adjustment in portion (A) in Fig. 1 and the release Bowden cable 8.3 connected to the release lever 11 (Fig. 7).
  • Fig. 10 depicts the assembly ofportions (B), (C), (D) and (E) as described in Fig. 1 , 5, 6, 7,
  • Fig.11 depicts the assembly of Fig.10 in an acute upper forward raised position of the seat pan and the compulsory syncronized movement of the backrest portion (E) relative to the seat pan (C), whereby the backrest (E) stays in a vertical position allowing a seated person to keep the upper body balancing upright
  • Fig. 12 describes the mechanical arrangement of the connecting hinge arrangement between the backrest support structure 7 and the lower pivotal hinged lever 4, whereby the lever 4 hinged in 4.2 has an rearward extending cam with an oblong sliding hole in 7.2 which engages the backrest lever hinged in 7.1 by means of a transverse shaft in 7.2 fixed to the backrest lever.
  • Fig. 13 describes the in Fig. 12 shown arrangement in the upper forward inclining position and demonstrates the reverse movement of the backrest
  • Fig. 14 depicts the in Fig. 10, 11, 12, & 13 described movements of the backrest (E) and the seat pan (C) when applied to a complete chair as described in Fig. 1, in a rearward reclined position and a forward and upward inclined position. It also describes the objective of this invention to allow a movement of a person from a reclined lower backward position to a higher forward inclined position rotating around the knee joint fulcrum with constant contact of the upper thigh to the seat pan, thus maintaining sufficient friction and support on the seat to prevent sliding forward and while asuming an opening of the body angle approximating 120 - 125 degrees, which is close to the zero-position as described in Fig. 6.
  • the locking of the up or down movement of the support structure depends on the form of device employed for the uplifting force. If the force is generated by a progressive coil spring, the detention or locking could be employed through means of a multi-layered clutch plate block, which arrests the movement of the pivoted parallelogram levers by means of a cam-shaped lever, clamping (locking) or releasing the clamp plates transverse and thus allow the spring to extend or to remain stationary.

Landscapes

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

Abstract

L'invention concerne un appareil d'assise utilisé en tant que mécanisme de support de siège, par exemple, dans une chaise de bureau, au moyen duquel le siège est déplacé par pivotement depuis une position assise inférieure inclinée vers l'arrière à une position assise supérieure inclinée vers l'avant sur un axe de pivotement transversal ayant pour pivot l'articulation du genou. L'appareil comprend une partie support (2), qui est fixée sur une colonne de gaz verticale (1), intégrée dans une base de chaise. Sur la partie support (2) se trouvent deux paires de leviers (4, 5), qui sont articulés transversalement de manière à pouvoir pivoter, qui forment un parallélogramme avec la partie d'appui (2) et une structure de support de siège (6), laquelle devient un parallélépipède à deux côtés opposés inégaux (4, 5), dans lequel un côté (4) est plus long que l'autre côté (5), de sorte que la rotation simule la rotation de la cuisse avec le pivot dans l'articulation du genou (3.b), et soutient ainsi uniformément la longueur de la cuisse sur l'ensemble de son mouvement. La force de soulèvement (3) destinée à soulever et maintenir une personne assise sur la structure (6) est positionnée à l'intérieur du parallélépipède articulé de manière pivotante à l'intérieur de la partie (2) et au point (3.2) dans la structure (6).
PCT/TH2018/000005 2018-02-07 2018-02-07 Structure de support de siège réglable WO2019156641A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/TH2018/000005 WO2019156641A1 (fr) 2018-02-07 2018-02-07 Structure de support de siège réglable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TH2018/000005 WO2019156641A1 (fr) 2018-02-07 2018-02-07 Structure de support de siège réglable

Publications (1)

Publication Number Publication Date
WO2019156641A1 true WO2019156641A1 (fr) 2019-08-15

Family

ID=67548517

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TH2018/000005 WO2019156641A1 (fr) 2018-02-07 2018-02-07 Structure de support de siège réglable

Country Status (1)

Country Link
WO (1) WO2019156641A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4084761A4 (fr) * 2019-12-30 2024-01-24 Inventor Group Gmbh Mécanisme à ressort pour un dispositif d'assise

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1514697A (zh) * 2001-06-15 2004-07-21 霍恩技术公司 改进的人体工学座椅
CN101715310A (zh) * 2007-06-06 2010-05-26 马莱诺蒂有限公司 具有摆动靠背的椅子
WO2014021796A1 (fr) * 2012-08-03 2014-02-06 Kummer Klaus Juergen Structure de support réglable
EP2782778A1 (fr) * 2011-11-25 2014-10-01 Sabelt S.p.A. Siège réglable destiné à un véhicule à moteur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1514697A (zh) * 2001-06-15 2004-07-21 霍恩技术公司 改进的人体工学座椅
CN101715310A (zh) * 2007-06-06 2010-05-26 马莱诺蒂有限公司 具有摆动靠背的椅子
EP2782778A1 (fr) * 2011-11-25 2014-10-01 Sabelt S.p.A. Siège réglable destiné à un véhicule à moteur
WO2014021796A1 (fr) * 2012-08-03 2014-02-06 Kummer Klaus Juergen Structure de support réglable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4084761A4 (fr) * 2019-12-30 2024-01-24 Inventor Group Gmbh Mécanisme à ressort pour un dispositif d'assise

Similar Documents

Publication Publication Date Title
US8944507B2 (en) Ergonomic adjustable chair mechanisms
US5160184A (en) Controller for seating and the like
US7234772B2 (en) Articulated seating mechanism
US6644748B2 (en) Synergistic body positioning and dynamic support system
US5630648A (en) Dynamic posture chair
US4695093A (en) Work chair
JP4987739B2 (ja) 椅子及び椅子用腰部サポートパッド、腰部サポートパッドアセンブリ
US5005905A (en) Chair for an office or the like
NL8004217A (nl) Stoel, in het bijzonder stoel voor een datavisie- toestel
US5884974A (en) Ergonomic arm support and bracket
EP2156766B1 (fr) Chaise et variantes
US9968196B2 (en) Kinematic mechanisms for furniture
US20190045929A1 (en) Seating device
WO2016044430A1 (fr) Tabouret permettant à une personne de travailler tout en gardant son équilibre
US20010020810A1 (en) Computer work station
GB2176396A (en) Posture support chair
US6142570A (en) Ergonomic arm support
KR200256511Y1 (ko) 골반 교정용 의자
WO2014021796A1 (fr) Structure de support réglable
WO2019156641A1 (fr) Structure de support de siège réglable
RU2654678C1 (ru) Рабочее место для учебы и офисного труда, включающее стол и кресло
JP2020535947A (ja) 姿勢適応型ワークチェア
KR101056745B1 (ko) 의자용 좌판 틸팅장치
JP2022513431A (ja) 椅子類のための同期機構及び椅子類
JP3622080B2 (ja) 重機操作用シート

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18904862

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18904862

Country of ref document: EP

Kind code of ref document: A1