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WO1997025905A1 - Siege de bureau inclinable - Google Patents

Siege de bureau inclinable Download PDF

Info

Publication number
WO1997025905A1
WO1997025905A1 PCT/KR1996/000025 KR9600025W WO9725905A1 WO 1997025905 A1 WO1997025905 A1 WO 1997025905A1 KR 9600025 W KR9600025 W KR 9600025W WO 9725905 A1 WO9725905 A1 WO 9725905A1
Authority
WO
WIPO (PCT)
Prior art keywords
chair
support portion
back support
housing
user
Prior art date
Application number
PCT/KR1996/000025
Other languages
English (en)
Inventor
Chul Hwang
Original Assignee
Chul Hwang
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 Chul Hwang filed Critical Chul Hwang
Priority to AU47325/96A priority Critical patent/AU4732596A/en
Publication of WO1997025905A1 publication Critical patent/WO1997025905A1/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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, 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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • 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
    • A47C7/002—Chair or stool bases
    • A47C7/004—Chair or stool bases for chairs or stools with central column, e.g. office chairs
    • 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
    • A47C7/002—Chair or stool bases
    • A47C7/006—Chair or stool bases with castors
    • 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
    • A47C7/50—Supports for the feet or the legs
    • A47C7/506—Supports for the feet or the legs of adjustable type
    • A47C7/5062—Supports for the feet or the legs of adjustable type rectilinearly
    • 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; Workshop stools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S297/00—Chairs and seats
    • Y10S297/07—Rocker/recliner

Definitions

  • the present invention relates in general to a reclining office chair and, more particularly, to a structural improvement in such a chair for pushing or pulling the chair on the floor more smoothly without causing any damage to the flooring material due to frictional force generated between the moving portion of the chair and the surface of flooring material and for freely reclining the back support portion of the chair sufficiently to provide comfortable seating and resting posture for a user, and furthermore allowing the user to almost horizontally lean back in the chair.
  • the moving portion of a conventional reclining office chair includes a plurality of, for example, four or five, legs.
  • the legs extend from a swivel shaft and have their casters.
  • the casters are mounted to the ends of the legs respectively such that each caster is free to swivel about an axis at angles of 360° to the axis of the caster.
  • a seat portion is mounted to the top of the swivel shaft such that the height of the seat portion from the floor can be adjusted.
  • the reclining back support portion of the chair is connected to the rear side of the seat.
  • the casters abruptly swivel and roll on the floor and cause large frictional force between them and the floor when the user moves up to or away from a desk, the casters not only cause damage to the flooring material, such as floorboard or floorcloth, they also make it difficult to exactly locate the chair on a desired position.
  • each caster when the user repeatedly moves up to or away from the desk, the gross weight of the chair (user's weight + chair's weight) is directly applied to the floor surface.
  • each caster abruptly swivels about an axis at angles of 180° to the axis of the caster, thereby causing the large frictional force between the casters and the floor surface. Therefore, the casters of the chair will cause damage to various expensive flooring materials, such as a floorboard, a textile carpet, a wood flooring and a floorcloth, which cover the floor for the various purposes of sound absorption, walking shock absorption, thermal insulation and interior decoration.
  • conventional office chairs are neither fixed to the floor nor mounted to chair guide rails. Different from the seats in airplanes or automobiles, office chairs need to be repeatedly pulled or pushed in the desired direction.
  • the back support portions of the chairs can not help being limited in their reclining angles relative to the seat portions to an extent that the chairs will not turn over when the user reclines all the way back. This limited reclined position of the back support portion is not suff cient for the user to rest comfortably, to say nothing of sleeping comfortably.
  • the conventional reclining office chair with a limited reclining angle may turn over when the user fully reclines the back support portion. Therefore, the conventional reclining office chair may wound the user, so the reclining office chair has a safety problem.
  • some offices may be provided with a separate resting area equipped with comfortable chairs whose back support portions can be reclined back almost fully.
  • the above resting area equipped with the comfortable chairs can not help causing a waste of office space and increasing the cost of office management.
  • the back support portion of the above chair has a fixed configuration, the back support portion does not meet with various sitting postures of the user but causes various diseases due to bad sitting postures for a long period by the user.
  • the users of the office chairs have different physiques and do office work with various sitting postures. Otherwise stated, a user sitting in the chair may stoop over a desk to write a document or stretch oneself to see a computer monitor.
  • the back of the user in either of the above postures is separated from the back support portion of the chair, thus to be supported by no part of the back support portion. Therefore, the back support portion having the fixed configuration can not support the back of the user in the above postures, thus to not only prevent the user from doing office work efficiently but also to cause various physical diseases, such as spinal curvature and internal maladies.
  • the user using the above chair may be mentally stressed due to the mental and physical problems caused by the chair and suffer from mental trouble.
  • an object of the present invention to provide a reclining office chair in which the above problems can be overcome and which minimizes frictional force generated between the chair and the floor when a user moves up to or away from a desk, allows the user to almost horizontally lean back in the chair and always supports the back of user regardless of sitting postures of the user, thereby letting the user either do office work or rest comfortably and safely.
  • a reclining office chair in accordance with a preferred embodiment of the present invention comprises: a caterpillar assembly adapted for moving the chair on a floor while reducing the frictional force generated between the caterpillar assembly and the floor; a swivel shaft adapted for rotatably coupling a seat portion to the caterpillar assembly and adjusting the seat portion's height from the floor; the seat portion having a housing in its bottom; a reclining back support portion connected to the rear side of the seat portion; an adjustable cushion provided in the back support portion, the adjustable cushion selectively advancing forward from the back support portion to support the back of a user when the user sits in the chair such that the back of the user is spaced apart from the back support portion; means for driving the adjustable cushion; a retractable foot holder received in the housing of the seat portion and selectively protruding out of the front of the housing; and a retractable support frame adapted for supporting the chair and preventing the chair from being suddenly turned over when the back support portion is reclined back to make
  • Fig. 1 is a side view showing the construction of a reclining office chair in accordance with a preferred embodiment of the present invention
  • Fig. 2 is a side view showing the operation of the chair of Fig. 1;
  • Fig. 3 is a sectional view of the chair taken along the section line A-A of Fig. 1; and Fig. 4 is a front view showing the construction of the back support portion of the chair of Fig. 1.
  • Fig. 1 is a side view of a reclining office chair according to a preferred embodiment of the invention.
  • Fig. 2 is a side view showing the operation of the above chair for reclining back the back support portion of the chair and supporting the chair with the reclined back support portion to prevent the chair from being suddenly turned over due to the reclined back support portion.
  • Fig. 3 is a sectional view of the above chair taken along the section line A-A of Fig. 1, and Fig. 4 is a front view showing the construction of the back support portion of the above chair.
  • the chair of this invention includes a motor-driven caterpillar assembly 10 instead of the conventional moving portion with casters.
  • the caterpillar assembly 10 which is adapted for moving the chair on the floor, minimizes the frictional force generated between the chair and the floor.
  • a shaft holder 10a vertically stands on the top of the caterpillar assembly 10 and vertically receives a seat height adjusting shaft 21.
  • a fixing bolt 10b is radially inserted in the holder 10a.
  • the swivelling structure of the seat portion 20 comprises a boss 21a which is provided to the outer bottom surface of the housing 22 and rotatably receives the top portion of the shaft 21.
  • a reclining back support portion 30 is connected to the rear side of the seat portion 20. This back support portion 30 can be reclined sufficiently to provide comfortable seating and resting posture for a user as will be described later herein.
  • the caterpillar assembly 10 includes a pair of caterpillars, each of which has a plurality of wheels 12 and an endless belt 11 wrapped about the wheels 12.
  • One of the wheels 12 of each caterpillar is connected to a caterpillar drive motor 13.
  • the motor 13 is a reversible motor which is operated by a drive switch or a three way switch 13a preferably mounted on a side surface of the housing 22.
  • the drive motor 13 is applied with electric power from an outside power source which will be hereinafter explained.
  • the drive switch 13 is always kept in the neutral position and maintains the drive motor 13 in the stop position when the chair is not loaded.
  • the seat portion 20 includes a seat cushion 26 which is laid on the housing 22.
  • the retractable foot holder 23 is received in the housing 22 and supported by rollers such that the holder 23 can selectively protrude out of the front of the housing 22.
  • the above holder 23 is handled by a pair of holder handle knobs 23a to either protrude out of or retract into the housing 22.
  • the holder handle knobs 23a are provided at both sides of the holder 23 and project out of both side walls of the housing 22 as best seen in Fig. 3.
  • the retractable support frame 40 is a folding frame which is received in the housing 22 such that the frame 40 can selectively protrude out of the back of the housing 22.
  • the above frame 40 is used for supporting the chair to prevent the chair from being suddenly turned over when the back support portion 30 is fully reclined back to make the chair's center of gravity move from the seat portion 20 to the reclined back support portion 30.
  • the frame 40 includes a horizontal frame part 24 and a vertical frame part 25 which are coupled to each other.
  • the frame 40 is also handled by a pair of frame handle knobs 24a when the frame 40 either protrudes out of or retracts into the housing 22.
  • the frame handle knobs 24a are provided at both sides of the horizontal part 24 and project out of both side walls of the housing 22 as best seen in Fig. 3.
  • the vertical part 25 is hinged to the rear side of the horizontal part 24 by means of a longitudinal pin 25a such that the part 25 can be either folded or unfolded relative to the horizontal part 24.
  • the vertical part 25 has a length sufficient enough to reach the floor when the part 25 is fully opened and perpendicular to the horizontal part 24 as shown in Fig. 2.
  • the housing 22 also has electric power charging means 15 which is charged with electric power supplied from an outside power source and supplies electric power for the drive motor 13.
  • the back support portion 30 includes a back support frame 31 which is pivoted to the rear side of the housing 22.
  • the above portion 30 also includes a back support cushion 31a mounted on the front surface of the frame 31. This cushion 31a is used for supporting the back of a user and providing comfortable seating and resting posture for the user.
  • a handle knob 39 is provided in the junction between the frame 31 and the housing 22.
  • the above back support frame 31 can be reclined back such that the frame 31 is almost level with the housing 22 when the frame 31 is fully reclined.
  • the middle portion of the back support cushion 31a is an adjustable cushion 37 which is separated from the other part of the back support cushion 31a.
  • This adjustable cushion 37 is selectively operated by drive means provided in the back support frame 31 to move relative to the other part of the support cushion 31a. That is, the adjustable cushion 37 can either advance forward as shown in the phantom line of Fig. 1 or retract to its original position in the back support cushion 31a as shown in the solid line of Fig. 1.
  • the adjustable cushion drive means comprises a pair of longitudinal guide shafts 32 which are longitudinally arranged in both sides of the back support frame 31 respectively as shown in Fig. 4.
  • a pair of movable sleeves 33 are fitted over each shaft 32 and biased by their associated compression coil springs 34.
  • the coil springs 34 are held by both ends of each shaft 32 and bias their associated sleeves 33 toward the center of each shaft 32.
  • Pivoted to each sleeve 33 is a link 36 which in turn is pivoted to an associated end of a support shaft 38 of the adjustable cushion 37 as shown in Figs. 1 and 2.
  • the support shaft 38 longitudinally extends on the back of the cushion 37,
  • a solenoid-operated fixing member 35 is provided in each sleeve 33.
  • the fixing members 35 provided for the sleeves 33 selectively fix the sleeves 33 to the shafts 32 when the members 35 are turned off.
  • a solenoid switch 35a for operating the members 35 is provided on, for example, a side wall of the housing 22 as shown in Figs. 1 and 2.
  • the motor 13 When the three way switch 13a is handled to select "forward”, the motor 13 is applied with electric power from the power charging means 15 of the seat portion 20 and rotated in the forward direction. The forward rotating force of the motor 13 is transmitted to the roller 12 of the caterpillar assembly 10 and makes the assembly 10 move forward to the desired position.
  • the switch 13a When the chair with the assembly 10 reaches the desired position, the switch 13a is handled to select "neutral”, the motor 13 is supplied with no power and thereby stops.
  • the switch 13a when the switch 13a is handled to select "reverse”, the motor 13 will be rotated in the reverse direction and the assembly 10 will move in the reverse direction.
  • the above switching motion for operating the caterpillar assembly 10 is similar to that used for operating an automobile power window.
  • the back support portion 30 When the back support portion 30 needs to be reclined back, a user handles the knob 39 in the conventional manner.
  • the back support portion 30 When the user wants to almost horizontally lean back in the chair, the back support portion 30 will be fully reclined back.
  • the chair in this case may be suddenly turned over as the chair's center of gravity has moved from the seat portion 20 to the reclined back support portion 30.
  • the user In order to support the chair in the above case, the user handles the knob 24a to make the retractable support frame 40 protrude out of the housing 22.
  • the vertical frame part 25 When the frame 40 completely protrudes out of the housing, the vertical frame part 25 is turned down about the pin 25a to be perpendicular to the horizontal frame part 24. Due to the frame 40, the chair with the fully reclined back support portion 30 can be prevented from being suddenly turned over.
  • the user When the user wants to put one's legs on the foot holder 23 and rest comfortably, the user handles the knob 23a to make the holder 23 protrude out of the front of the housing 22.
  • the back support portion 30 When the back support portion 30 is fully reclined back and, at the same time, the foot holder 23 protrudes out of the housing, the user can rest comfortably while almost horizontally leaning back in the chair and putting one's legs on the holder 23.
  • the users of the office chairs have different physiques and do office work with various sitting postures. Otherwise stated, the user may stoop over a desk to write a document or stretch oneself to see a computer monitor.
  • the back of a user in either of the above postures is separated from the back support cushion 31a.
  • the chair may not only prevent the user from doing office work efficiently but also cause various physical diseases.
  • the chair of this invention can support the back of the user in either of the above postures and thereby overcoming the above problems. That is, when the solenoid switch 35a is turned on to activate the solenoid-operated fixing members 35 of the adjustable cushion drive means, the members 35 release their associated sleeves 33 from the shafts 32. Thus, the spring-biased sleeves 33 elastically move to the center of each shaft 32 and thereby close the links 36. Hence, the adjustable cushion 37 advances forward from the position shown in the solid line of Fig. 1 to the position shown in the phantom line.
  • the cushion 37 is freely movable forward and backward relative to the back support portion 30 while turning on the switch 35a, the user can freely adjust the position of the cushion 37 by moving one's upper body forward and backward.
  • the switch 35a is turned off to let the fixing members 35 fix their associated sleeves 33 to the shafts 32 and thereby fixing the cushion 37 at that adjusted position.
  • the reclining office chair of this invention includes a motor-driven caterpillar assembly instead of the conventional moving portion with casters.
  • the chair reduces the frictional force generated between the chair and the flooring material while the chair is pushed or pulled on the floor.
  • the above chair has a retractable support frame which selectively protrudes out of the back of the seat portion to support the chair when the back support portion is fully reclined back. With the above support frame, the chair can be prevented from being suddenly turned over even though the chair's center of gravity is in the reclined back support portion. Therefore, a user almost horizontally leans back in the chair.
  • the above chair also includes a retractable foot holder which selectively protrudes of the front of the seat portion, the user can put one's legs on the holder and rest comfortably.
  • the chair further includes an adjustable cushion in the back support portion.
  • the adjustable cushion selectively advances forward from the back support portion to support the user's back when the user's back is separated from the back support portion while the user stoops over a desk to write a document or stretches oneself to see a computer monitor. Therefore, the above chair always supports comfortably the user's back regardless of user's postures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

La présente invention concerne un siège de bureau inclinable. Ce siège est équipé d'un ensemble motorisé à chenillettes en remplacement des roulettes conventionnelles, ce qui fait que ce siège exerce une force de frottement réduite lorsqu'on le fait avancer ou reculer sur le sol. Un châssis support rétractable déborde sélectivement derrière l'assise du siège de façon à soutenir le siège lorsque le dossier est complètement incliné. Grâce à ce châssis support, on évite au siège de se renverser brutalement même lorsque le centre de gravité du siège vient à se trouver dans le dossier incliné. Le siège offre ainsi à l'utilisateur une inclinaison proche de l'horizontale. Le dossier du siège comporte en outre un coussin réglable, ce qui fait que ce siège soutient confortablement le dos de l'utilisateur quelles que soient ses postures.
PCT/KR1996/000025 1995-02-20 1996-02-21 Siege de bureau inclinable WO1997025905A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU47325/96A AU4732596A (en) 1995-02-20 1996-02-21 Reclining office chair

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2019950002787U KR200153954Y1 (ko) 1995-02-20 1995-02-20 사무용 의자
KR1995-2787U 1995-02-20

Publications (1)

Publication Number Publication Date
WO1997025905A1 true WO1997025905A1 (fr) 1997-07-24

Family

ID=19408160

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1996/000025 WO1997025905A1 (fr) 1995-02-20 1996-02-21 Siege de bureau inclinable

Country Status (2)

Country Link
KR (1) KR200153954Y1 (fr)
WO (1) WO1997025905A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2398549A (en) * 2003-02-18 2004-08-25 Godwin Erapi Motorised reclining adjustable wheelchair
CN104323588A (zh) * 2014-10-15 2015-02-04 西安交通大学 创新实验课桌
CN109090886A (zh) * 2018-08-20 2018-12-28 陈怀娥 一种户外多功能板凳
US10335330B2 (en) 2017-03-02 2019-07-02 Travelsys4u Ltd. Motor-driven chair steered by seat rotation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101381073B1 (ko) * 2013-11-19 2014-04-04 송성진 신체교정과 온열치료를 겸한 기능성 의자
CN104172763B (zh) * 2014-08-28 2016-09-28 浙江凯帝家具有限公司 一种折叠软背椅

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2541559A1 (de) * 1975-09-18 1977-03-24 Bama Bueroeinrichtungs Ges Mbh Rueckenstuetze fuer sitze aller art
US4453732A (en) * 1981-12-24 1984-06-12 Assanah Albert A Patient transport and care vehicle
DE3150193C2 (de) * 1981-12-18 1987-04-30 Rettungsdienst Stiftung Björn Steiger e.V., 7057 Winnenden Rollstuhl für Körperbehinderte
US5123495A (en) * 1988-06-10 1992-06-23 Quest Technologies, Inc. Wheelchair stair climbing control system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2541559A1 (de) * 1975-09-18 1977-03-24 Bama Bueroeinrichtungs Ges Mbh Rueckenstuetze fuer sitze aller art
DE3150193C2 (de) * 1981-12-18 1987-04-30 Rettungsdienst Stiftung Björn Steiger e.V., 7057 Winnenden Rollstuhl für Körperbehinderte
US4453732A (en) * 1981-12-24 1984-06-12 Assanah Albert A Patient transport and care vehicle
US5123495A (en) * 1988-06-10 1992-06-23 Quest Technologies, Inc. Wheelchair stair climbing control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2398549A (en) * 2003-02-18 2004-08-25 Godwin Erapi Motorised reclining adjustable wheelchair
GB2398549B (en) * 2003-02-18 2006-08-16 Godwin Erapi Multi-purpose mobile wheel chair
CN104323588A (zh) * 2014-10-15 2015-02-04 西安交通大学 创新实验课桌
US10335330B2 (en) 2017-03-02 2019-07-02 Travelsys4u Ltd. Motor-driven chair steered by seat rotation
CN109090886A (zh) * 2018-08-20 2018-12-28 陈怀娥 一种户外多功能板凳

Also Published As

Publication number Publication date
KR960028190U (ko) 1996-09-17
KR200153954Y1 (ko) 1999-08-02

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