WO2008018117A1 - Fauteuil - Google Patents

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Publication number
WO2008018117A1
WO2008018117A1 PCT/JP2006/315611 JP2006315611W WO2008018117A1 WO 2008018117 A1 WO2008018117 A1 WO 2008018117A1 JP 2006315611 W JP2006315611 W JP 2006315611W WO 2008018117 A1 WO2008018117 A1 WO 2008018117A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
support
auxiliary frame
base
backward
Prior art date
Application number
PCT/JP2006/315611
Other languages
English (en)
Japanese (ja)
Inventor
Nobutoshi Yamazaki
Kei Kawakami
Yoshiko Yagi
Nobuhiko Kitada
Hiroshi Takeuchi
Hiroyuki Ito
Original Assignee
Itoki Corporation
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 Itoki Corporation filed Critical Itoki Corporation
Priority to PCT/JP2006/315611 priority Critical patent/WO2008018117A1/fr
Priority to CNA2006800555526A priority patent/CN101505634A/zh
Publication of WO2008018117A1 publication Critical patent/WO2008018117A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile 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
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/405—Support for the head or the back for the back with double backrests

Definitions

  • the present invention relates to a chair (synchronous chair) in which a backrest and a seat are interlocked and tilted backward. More specifically, the present invention relates to a chair suitable for women.
  • backrest there is a net with a frame stretched around, but a thin back shell made of synthetic resin with a cushion attached to the front is often used. It is often attached to the back support (back strut) that is located behind.
  • Patent Document 1 An improvement proposal relating to this point is disclosed in Patent Document 1 which is the prior application of the applicant of the present application.
  • the backrest is formed in a structure that bends in side view, the backrest bends in a convex shape in side view in the non-locking state, and the entire backrest is flat in side view when locked. It is designed to be in the form. Further, the above In the claimed invention, the upper part and the lower part of the backrest that sandwich the bending point are fixed to separate links, and the shape of the backrest in a side view in the non-locking state and the locking state is changed by changing the degree of backward tilting of the link. Different.
  • Patent Document 1 Japanese Patent No. 3553301
  • the present invention has been made in order to improve such a current situation, and an object thereof is to provide a chair suitable for women while partially following the idea of Patent Document 1.
  • the chair according to the present invention includes, as a basic configuration, a base attached to a leg, a seat supported by the base, a backrest to which a seated person can lean, and a back to which the backrest is attached.
  • the seat and the back support are supported by the base so that they can tilt at least backwards against the spring means.
  • the backrest includes a flexible back shell that supports the body pressure of the seated person, and the back shell covers the waist of the seated person when the knock support and the seat are not tilted backward. It is greatly curved forward and convex in a longitudinal side view so that it can be supported in a concentrated manner, and when the back support and seat are tilted backward, it stretches and deforms so as to approach a flat state in the longitudinal side view. This is the first feature.
  • the back shell is allowed to be stretched and deformed by attaching only the upper part to the back support so as not to be separated from the front and back, and the back support is tilted backward in conjunction with the back tilt of the back support.
  • an auxiliary frame that stretches and deforms the back shell is connected.
  • the back support of the present invention means a member to which the backrest is attached, and it does not mean that it constitutes the rear part of the seat chair.
  • a person sitting in a posture in which the upper body is raised raises the spine while holding the center of gravity of the upper body directly above the pelvis by placing the waist (lumbar vertebrae) on the forward convex part of the backrest.
  • the upper body of the seated person will bend up with his chest raised, and as a result, his head will wake up, Because of this, the beauty that stretched back It can be used for a long time with a long posture, and is therefore particularly suitable for women.
  • the backrest is flattened and deformed flatly in a side view in the longitudinal direction (finally, it may be flattened or loosely curved).
  • the waist and back are evenly supported with a feeling of pushing up against the waist.
  • This aspect is also suitable for women.
  • the present invention has various nourisions.
  • the auxiliary frame is set to tilt backward to a greater degree than the back support, and the auxiliary frame and the lower part of the back shell (that is, the apex of the forward convex curved portion).
  • the lower part is connected in a state where it can move in the vertical direction and cannot be separated in the front-rear direction, and the auxiliary frame tilts backward to a greater degree than the back support.
  • the back shell is stretched and deformed.
  • the seat and the back support are fixed to each other so as to be tilted backward and backward together, and the tilting fulcrum of the seat and the back support is located at the front portion of the base, while
  • the auxiliary frame is connected to the rear part of the base and the back support, and the auxiliary frame is positioned to the rear of the tilting fulcrum of the seat and the back support so that the auxiliary frame is larger than the knock support.
  • the back support includes a horizontal portion extending to the vicinity of the front portion of the base below the seat, and a longitudinal axis provided on the base by a support shaft provided at the front portion of the horizontal portion. It is connected to the horizontal bearing part so that it can be tilted backward and backward, the seat is fixed to the horizontal part of the back support, and the auxiliary frame is connected to the rear part of the base so that it can tilt backwards. Has been.
  • the seat and the back support are not tilted backward only by sitting, and the person leans on the backrest. It is necessary for the back support (back) and the seat to tilt backward (or back and back).
  • a support shaft is attached to the seat (or a bracket to which the seat is fixed), and the length of the support shaft that is open to the base is long.
  • the long holes in the base are formed in a backward tilted position when viewed from the side, so that the seat ascends and retracts while descending as a whole. It starts to move!
  • the auxiliary frame is provided with a support body that also supports the back side force of the apex portion of the forward convex curved portion of the knock shell.
  • the present invention also has a norelation relating to the seat.
  • the front seat is divided into a front seat portion and a rear seat portion with a bent portion extending in the left-right direction, and the front seat portion can be tilted forward about the bent portion.
  • the width dimension is set to a dimension larger than 1Z4 and smaller than 1Z2 of the front and rear width dimension of the entire seat, and the seat front portion is stepwise or steplessly changed to a side view posture by turning the lever. It is supported by a member arranged below the seat so that it can be changed.
  • the problem of swelling of the lower leg of a woman in the office is a serious force.
  • the front seat is tilted forward to eliminate pressure on the thigh.
  • swelling of the lower leg can be eliminated or significantly suppressed.
  • the front-rear width dimension of the front part of the seat is larger than the front-rear width dimension of 1Z4 and smaller than 1Z2. With this dimension, the pelvis can be effectively restrained from pressing on the thigh while being held stable in the back of the seat.
  • the front end portion of the seat is recessed in a forward concave shape in plan view.
  • the seated person receives a guide action that moves both knees toward the center line of the seat, and as a result, aligns both knees. It becomes easy to hold the posture. In this regard, it is a form for women who prefer to sit with both knees aligned.
  • FIG. 1A is a front view of a chair
  • FIG. 1B is a side view of the chair.
  • FIG. 2A is a plan view of the chair
  • FIG. 2B is a sectional view taken along the line IIA-IIA in FIG. 1A
  • FIG. 2C is a rear view of the chair.
  • FIG. 3A is a longitudinal side view of a chair
  • FIG. 3B is a longitudinal side view of a seat and a backrest.
  • FIG. 4 is a plan view with the seat omitted.
  • FIG. 5 is a perspective view of members constituting the locking mechanism.
  • FIG. 6 is an exploded perspective view of the base and the lower receiving member.
  • FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG.
  • FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG.
  • FIG. 9 is an exploded perspective view of a seat inner shell.
  • FIG. 10 is a schematic perspective view of an outer shell.
  • FIG. 11 is an exploded perspective view of members constituting the back part.
  • Fig. 12A is a partially broken front view of the backrest
  • Fig. 12B is a sectional view taken along the line B-B in Fig. 12A with the cushion omitted
  • Fig. 12C is CC in Fig. 12A with the cushion omitted.
  • FIG. 13 is an exploded perspective view of members constituting the back part.
  • FIGS. 14A and 14B are perspective views in the assembled state of the members constituting the locking mechanism, FIG. 14A is a view with the front cover removed, and FIG. 14B is a state with the front cover removed.
  • FIG. 14A is a view with the front cover removed
  • FIG. 14B is a state with the front cover removed.
  • FIG. 15 is a partial vertical side view of the back.
  • FIG. 16A is a conceptual diagram for explaining the movement of the backrest and the seat
  • FIG. 16B is a conceptual diagram showing the lumbar support function.
  • FIG. 17 is an exploded perspective view showing the support mechanism portion of the seat front portion.
  • FIG. 18 is a plan view showing a support mechanism part of a seat front part.
  • FIG. 19 is a cross-sectional view taken along the line XIX-XIX in FIG.
  • FIG. 20 is a cross-sectional view taken along the line XX-XX in FIG.
  • the chair includes a leg 1, a base 2 attached to the upper end of the leg 1, a seat 3 disposed above the base 2, and a backrest 4 disposed behind the seat 3.
  • the leg 1 includes a pedestal 5 that also has a gas cylinder force, and branch legs 6 that extend radially from the pedestal 5, and a caster 7 is provided at the tip of each branch leg 6.
  • the lock of the pedestal 5 can be released by operating the lever 8 (see FIG. 1A) provided on the base 2.
  • the seat 3 includes front and rear seat inner shells (seat plates) 9 and 10 made of resin and cushion bodies 11 stretched so as to extend in series on the upper surfaces thereof.
  • the seat 3 comprises a seat rear portion 3b that does not move unless it is locked, and a seat front portion 3a that can be tilted forward.
  • the front inner shell 9 and the rear inner shell 10 are connected by a horizontally long connecting pin 12, and the seat front portion 3a can be tilted forward with the connecting pin 12 as the center.
  • the backrest 4 has a structure in which a cushion 4b is stretched on the front surface of a synthetic resin back shell 4a, and a back cover 13 extending over almost the entire height of the back shell 4a is provided behind the back shell 4a. (Back cover 13 is fixed to back support 19 to be described later.) O
  • the backrest 4 has a side guard section ⁇ that protrudes so as to wrap the waist of the person sitting on both sides. Yes.
  • the main reason for the side girth section is to improve the posture stability of the seated person, and the seated person wears roller's pants, and the waist skin is exposed. If you can not see the external force! /, Is to cover
  • the space between the knock cover 13 and the base 2 is closed by the rear cover 14, and a front cover 15 is mounted in front of the base 2, and the front cover 15 is provided on both left and right sides.
  • the front lever knob 16 for tilting the seat front part 3a is exposed (details will be described later).
  • the front cover 15 is attached to the front inner shell 9 of the seat 3.
  • Reference numeral 17 shown in FIGS. 1 and 2 is a lever that switches the backrest 4 between a state in which the backrest 4 can be tilted backward and a state in which the backrest cannot be tilted.
  • the base 2 has a nosing shape that opens upward, and a back support 19 to which a seat 3 and a backrest 4 are attached is connected to the base 2 as shown in FIG.
  • the back support 19 includes two left and right pipes 20 as main members.
  • the pipe 20 is composed of a horizontal portion 20a that is positioned below the seat 3 and extends in the front-rear direction, and a back column 20b in which the rear end force of the horizontal portion 20a rises upward!
  • the front ends of the left and right pipes 20 constituting the knock support 19 have an open groove type facing upward as viewed from the front.
  • the front bracket 21 is fixed by welding.
  • the left and right front brackets 21 are fixed to the left and right horizontally long first support shafts (also called slide shafts) 22 by welding, and the horizontal portions 20a of the left and right pipes 20 are
  • the connecting portion 23 and the second connecting body 24 are integrally connected.
  • the first support shaft 22 is disposed below the horizontal portion 20 a of the pipe 20.
  • an outer shell 25 made of grease is provided below the rear inner shell 10, and the rear inner shell 10 is detachably fixed to the outer shell 25.
  • the outer shell 25 is fixed to the first connecting body 23 of the knock support 19 with screws or the like.
  • the front inner shell 9 has a shape close to a substantially flat plate.
  • the rear inner shell 10 is gently bent in an upward concave shape in a front view, and is gently curved in an upward concave shape in a longitudinal front view.
  • the front and rear inner shells 9 and 10 are connected to the pair of left and right cylindrical bearing portions 9a and 10a and the semicircular bearing portions 9b and 10b so that they can be bent.
  • the connecting pin 12 (in other words, the first support shaft 22 is positioned in front of the bending point of the seat front 3a.) Slightly it is positioned behind the first spindle 22 0
  • the front and rear inner shells 9, 10 are connected and then the cushion 11 is integrally formed by the insert molding method.
  • the cushion 11 can be separately manufactured and attached.
  • the outer shell 25 is disposed directly below the rear inner shell 10, and the rear inner shell 10 is moved to the outer side by fitting the claw-like engaging portion 25 a of the outer shell 25 and the hole-like engaging portion 10 c of the rear inner shell 10. It is attached to the shell 25.
  • the first support shaft 22 of the back support 19 is sandwiched between a lower bearing member 26 and an upper bearing member 27 that overlap each other in the vertical direction.
  • the holding member 28 is overlapped with the member 27, and these three members are fastened together with screws (not shown) to the base 2 in a state of being overlapped with each other! RU
  • the lower bearing member 26 has four front and rear, left and right engagement holes 29 penetrating vertically, while the base 2 has the engagement holes 29 described above.
  • the boss body 2a that fits tightly is formed in the body, and by inserting the lower bearing member 26 into the boss body 2a, The lower bearing member 26 is held immovable in the horizontal direction.
  • the pressing member 28 is fastened to the boss body 2a with screws.
  • the base 2 is formed with a center protrusion 2b where the rear end of the lower bearing member 26 comes into contact, a hole 2c into which the pillar 5 is fitted, an overhanging portion 2d for attaching an armrest (not shown), and the like.
  • the base 2 and the upper and lower bearing members 26 and 27 are die-cast products such as aluminum, and the pressing member 28 is a sheet metal product. However, the material and processing method of these members can be arbitrarily selected.
  • the upper and lower bearing members 26 and 27 are formed with long grooves 30 that allow the first support shaft 22 to slide back and forth.
  • the upper and lower elongated grooves 30 are elongated by overlapping each other.
  • a spring (compression coil spring) 31 is disposed between the upper and lower bearing members 26 and 27, and a rear wall 32 is formed at the rear end of the lower bearing member 26 to support the spring 31 with a rearward force.
  • a front spring support 33 that supports the spring 31 forward is overlapped with the first support shaft 22 of the knock support 19.
  • the knock support 19 (and the seat 3 and the backrest 4) can slide backward against the spring 31 and can tilt backward about the first support shaft 22.
  • the long grooves (long holes) 30 of the upper and lower bearing members 26, 27 extend in the horizontal direction. For this reason, even if the spring force of the spring 31 is not excessively large, the seat 3 cannot be tilted backward only by a person sitting on the seat 3.
  • first support shaft 22 It is also possible to directly attach the first support shaft 22 to the base 2 without using the vertical shaft bearing members 26, 27, and the first support shaft 22 is connected to the back support 19. It is also possible to manufacture the first support shaft 22 separately and fit the first support shaft 22 into a long hole formed in the base 2.
  • a bearing member 35 for holding the front lever is attached to the front end portion of the left and right front brackets 21, and the cam member 36 is attached by the bearing member 35. Support. Details of this point will be described later.
  • the backrest 4 is provided with a back shell 4a made of greaves and a cushion 4b stretched on the front surface thereof (a bag-like cloth is also stretched).
  • the knock shell 4a has a number of horizontally long slits 38. The shell 4a retains flexibility so that the shape of the longitudinal side view can be easily changed.
  • the upper ends of the left and right back struts 20b are connected by an upper connecting body 39 having a cross-sectionally rearward opening groove type, and the upper end portion of the back shell 4a is connected to the upper connecting body. It is attached to 39 so that it cannot be separated.
  • a locking portion 4c is formed on the upper part of the knock shell 4a, and the locking portion 4c is fitted to the upper coupling body 39.
  • an auxiliary frame 40 having a substantially L-letter shape in a side view with two left and right pipe members as main members is disposed as a part of the locking mechanism.
  • the frame can also be referred to as a rear frame or a link.
  • the left and right horizontally elongated second support shafts 42 are integrally fixed to the front ends of the left and right pipes constituting the auxiliary frame 40 via the bracket plate 41. ing.
  • the second support shaft 42 is sandwiched between the rear part of the base 2 in a state where it can be rotated by upper and lower split bearings 43, 44, and the bearings 43, 44 are
  • the holding member 45 is fixed to the base 2 with screws. Therefore, the auxiliary frame 40 can tilt about the third support shaft 42.
  • the auxiliary frame 40 may be connected to the base 2 with a pin.
  • the bearings 43 and 44 should originally be displayed in cross section, but the cross section display (hatching) is not performed because of the complexity. In FIG. 13, only the upper bearing member 43 is shown.
  • a third connector 46 made of a metal plate is fixed to the lower part of the left and right pipes constituting the auxiliary frame 40, and the upper ends of the left and right pipes
  • a fourth connector 47 made of a metal plate is fixed to the body.
  • the third connecting body 46 includes a forward groove, 46a, and upper and lower blades 46b, while a third support shaft 49 is fixed to the lower body of the left and right back struts 20b via a bracket material 48.
  • the third support shaft 49 is rotatably sandwiched between upper and lower split-type bearing bodies 50 and 51, and the front and rear bearings 50 and 51 are held together by the holding force 52. It is fixed to the third connecting body 46 via Accordingly, the knock support 19 (back strut 20b) and the auxiliary frame 40 rotate in conjunction with each other.
  • the rear bearing 50 is fitted in the forward groove 46a of the third connecting body 46, and the holding member 52 is fixed to the blade 46b of the third connecting body 46 with screws. Yes.
  • the fourth connecting body 47 in the auxiliary frame 40 is formed with a pair of left and right bearing pieces 47a extending upward, and is inserted into the left and right bearing pieces 47a.
  • a roller-shaped support body 54 is rotatably fitted to the pin 52, and the support body 54 is brought into contact with the back surface of the back shell 4a.
  • the support body 54 is separated into the left and right, and the left and right support bodies 54 are rounded and truncated cone-shaped so that the portion close to the center of the backrest 4 has a small diameter ( As a whole, the central part is constricted.)
  • the portion of knock shell 4a where the seated person hits is curved in a forwardly convex shape in a side view so that the portion on which support body 54 hits is located closest to the front.
  • the forward apex portion 4 of the knock shell 4a is substantially the same height as the third lumbar vertebra Y3 of the seated person.
  • a box-shaped bracket projecting rearward is formed in a portion of the back surface of the back shell 4a located between the third connecting body 46 and the fourth connecting body 47 of the auxiliary frame 40.
  • the left and right lateral guide pins 56 are formed integrally with each other via the section 54. (The guide pins 56 may be a separate member from the back seal 4a.)
  • the guide body 57 in which the guide pin 56 of the backrest 4 is fitted to the third connecting body 46 and the fourth connecting body 47 of the auxiliary frame 40 is fixed with screws! / RU
  • the guide body 57 has a guide groove 57a which is vertically long and has a lower portion opened forward.
  • the guide groove 57a and the guide pin 56 are fitted, so that the knock shell 4a is separated forward from the auxiliary frame 40. It is held (locked) so that it cannot move and can move up and down.
  • the reason why the lower portion of the guide groove 57a is opened forward is to allow the guide pin 56 to be fitted / removed also with the front side force.
  • the auxiliary frame 40 is covered from the front by an auxiliary cover 58, and as shown in FIG. 14B, the support body is a support body among the mechanism portions that support the backrest 4.
  • the portion excluding the periphery of 54 is covered with a front cover 59.
  • the front cover 58 has a window hole 59a for exposing the substantially upper half of the auxiliary cover 59.
  • the back cover 13 is provided with a claw for attaching it, but the display is omitted in FIG. Figure 14A
  • the hanger 60 can be attached to the upper connecting body 39 of the back support 19.
  • the auxiliary frame 40 is attached to the base 2 at a position near the rear end of the seat 3, and therefore, the rotation fulcrum of the auxiliary frame 40 is a person. It is shifted backward from the center point (position indicated by the black arrow in Fig. 3A) where the load is applied when seated. For this reason, when the person is seated and the backrest 4 is not leaning against the backrest 4, the knock support 19 is supported by the auxiliary frame 40 so that the rearward force is also supported upward. This prevents the first spindle 22 from moving backward.
  • the backrest 4 is greatly curved forward and convex in a longitudinal side view, so that the seated person's lumbar vertebra Y (especially the third lumbar vertebra Y3) is Therefore, the stability of the seated person's pelvis and spine is high. As a result, a person can sit down for a long time without getting tired in a posture in which the back is stretched.
  • the forward apex 4a 'of the backrest 4 is supported by the support body 54 with the back force, the forward apex 4 of the backrest 4 is dented by the human body pressure or the degree of curvature is reduced. There is nothing. For this reason, the lumbar support function can be maintained with great strength.
  • the seat 3 and the backrest 4 since the seat 3 and the backrest 4 are attached to the back support 19, the seat 3 and the backrest 4 integrally move backward and backward, and the degree of the rearward tilt of the knock support 19 The degree of backward tilting of seat 3 is consistent.
  • the auxiliary frame 40 and the back column 20b are connected, the auxiliary frame 40 tilts backward in conjunction with the rearward tilt of the back column 20b, but the auxiliary frame 40 rotates. Since the fulcrum is located behind the rotation fulcrum of the back column 20b, the auxiliary frame 40 tilts backward at a larger angle than the back column 20b. Further, since the back support 19 also moves backward, the auxiliary frame 40 tilts backward while being pushed backward, and this also causes the auxiliary frame 40 to tilt backward to a greater degree than the back column 20b.
  • the support body 54 and the back column 20b are both inclined backward, the support body 54 is supported by the back support. It will tilt backward relative to the pillar 20b.
  • the guide pin 52 is fitted in the guide member 57 and is held so as not to be separated from the front and rear with respect to the auxiliary frame 40.
  • the back shell 4a is subjected to the action of pulling downward, and the shape force that is greatly bulged forwardly convex in a longitudinal side view is close to a flat shape and deformed to a shape. For this reason, it is comfortable for a person who feels that the person's back and hips are pushed up in a rocking state.
  • the backrest 4 when the backrest 4 extends and deforms while tilting backward, the backrest 4 tilts backward at a larger angle than the seat 3, and therefore the seat 3 and the backrest 4 are supported by the back support 1 9 Despite being attached to the backrest 4, the backrest 4 can be tilted backward enough to ensure a comfortable rocking condition.
  • the bracket portion 55 of the back shell 4a has a small vertical dimension! /. Therefore, the lower portion of the back shell 4a is easily deformed. For this reason, the back shell 4a is naturally rounded. You can be in a waiting state. For this reason, it has good fit to the human waist
  • the front bracket 21 of the knock support 19 constitutes a part of the support means of the seat front portion 3a, and the front bracket 21 is a hook-like protruding portion that protrudes forward from the horizontal portion 20a of the pipe 20. 21a.
  • the bearing member 35 includes a side plate 35a positioned on the left and right outer sides, a support surface 35b positioned on the inner side of the side plate 35a, a downward projecting portion 35c that fits into the groove of the hook-shaped projecting portion 14a, and a lower portion of the pipe 13
  • a rear-facing convex part 35d, an inwardly extending piece 35e projecting inward from the left and right sides, and a back plate 35f that contacts the front of the front bracket 14, and the rearward convex part 35d is connected to the front bracket 21 by a pin 62.
  • the bearing member 35 is held so as not to change its posture with respect to the front bracket 21.
  • the support surface 35b of the bearing member 35 has a horizontal base end and an inclined surface on the front side.
  • the posture of the seat front portion 3a is changed by the rotation of the front lever 34.
  • the front lever 34 includes a left and right central shaft 34a that fits into a bearing hole 63 formed in the side plate 35a of the bearing member 35, a center crank 34b that is bent between the left and right central shaft 34a, and the outer side of the left and right central shaft 34a.
  • the formed side crank 34c and the hook part 34d bent at the tip of the side crank 34c are also made of force, and the knob 16 described above is fixed to the hook part 34d.
  • the projecting direction of the center crank 34b and the projecting direction of the side crank 34c are shifted by approximately 90 degrees when viewed from the axial direction of the central shaft 35a. While the corner of the front lever 34 is slightly rounded, the side plate 35a of the bearing member 35 is thin, so the front lever 34 can fit its center shaft 34a into the bearing hole 63 of the bearing member 35. .
  • cam members 36 are also fitted to the left and right ends of the center crank 34b of the front lever 34 with an external force.
  • the cam member 36 includes a long hole 36a in which the center crank 34b of the front lever 34 is slidable in a direction perpendicular to the axis thereof, and is formed in a substantially flat cylindrical shape, and one end portion is a support surface of the bearing member 35. It is listed in 35a.
  • the cam member 36 rotates about its base end, and takes a posture of an upright posture that overlaps with the back plate 35f of the bearing member 35 and a forward tilted posture (horizontal posture) that overlaps the inclined portion of the support surface 35b. Can be changed.
  • a stopper projection 65 for holding the cam member 36 in an upright posture is formed on the lower surface of the front inner shell 9 in the seat 3.
  • the front inner shell 9 has a front-side and left-right middle portion with arcuate guide holes 66 in a side view arc shape into which the left-right middle portion of the center crank 34b of the front lever 34 is fitted. Is provided.
  • the guide hole 66 is formed by forming a downwardly concave upper guide surface 67 on the front inner shell 9 and attaching an upwardly concave lower guide body 68. It is fitted in the engagement hole 69 formed in the inner shell 9.
  • the seat front portion 3a is not tilted forward.
  • the posture is changed between the normal posture and the forward leaning posture (see the dashed line in Fig. 20).
  • the forward tilt angle is preferably about 10 to 15 degrees.
  • FIG. 3B The dimensional relationship between the seat front part 3a and the seat rear part 3b of the seat 3 is shown in Fig. 3B. If the overall front-rear width dimension of the seat 3 is WO, and the front-rear width dimension of the seat front 3a is W1, then (1 / 4-W0) ⁇ W1 ⁇ (1 / 2-W0), and W1 is The actual size is preferably about 200mm. Further, it is preferable that the connecting portion (the axial center of the connecting pin 12 which is the center of bending) is located in front of the portion 31 / force where the rear seat portion 3b is most recessed 90-: L 10 mm. The most recessed part 3b ′ of the seat rear part 3b is located behind the front-rear center position of the seat 3 as a whole.
  • the connecting portion the axial center of the connecting pin 12 which is the center of bending
  • each member such as a base, a seat, a knock support, an auxiliary frame, and a backrest can be any shape as long as the function is maintained.
  • both the knock support and the auxiliary frame can be made of sheet metal products or die-cast products.
  • the horizontal portion of the knock support located below the seat may be a die-cast product or a sheet metal product, and the back strut may be a pipe.
  • the present invention can also be applied to a chair in which the seat only tilts backward in conjunction with the backrest.

Abstract

L'invention concerne un dossier (4) muni d'une coque arrière flexible (4a). L'extrémité supérieure de la coque arrière (4a) est adaptée à l'extrémité supérieure d'un support arrière (19). Un siège (3) est fixé à une partie horizontale (20a) du support arrière (19). Le support arrière (19) est raccordé à une base (2) de façon à être mobile et inclinable vers l'arrière. Un cadre auxiliaire (40) est raccordé à l'arrière de la base (2) de façon à être inclinable vers l'arrière et raccordé de façon relativement mobile au support arrière (19). La partie inférieure de la coque arrière (4a) est maintenue sur le cadre auxiliaire (40) de telle sorte qu'ils puissent être déplacés relativement dans la direction verticale et qu'ils ne puissent pas être séparés l'un de l'autre dans les directions vers l'arrière et vers l'avant, et la partie inférieure de la coque arrière (4a) est appuyée vers l'avant par un corps de support (54). Lorsque le dossier (4) et le siège (3) sont inclinés vers l'arrière, la coque arrière (4a) est allongée et déformée en une forme plate. Parmi les parties du siège (3), une partie avant (3a) du siège sur laquelle les cuisses de la personne assise sont placées peut être inclinée vers l'avant autour d'une broche de connexion (12). Par conséquent, un gonflement d'une jambe inférieure de la personne assise peut être supprimé par l'élimination de la compression sur la cuisse.
PCT/JP2006/315611 2006-08-07 2006-08-07 Fauteuil WO2008018117A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2006/315611 WO2008018117A1 (fr) 2006-08-07 2006-08-07 Fauteuil
CNA2006800555526A CN101505634A (zh) 2006-08-07 2006-08-07 椅子

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2006/315611 WO2008018117A1 (fr) 2006-08-07 2006-08-07 Fauteuil

Publications (1)

Publication Number Publication Date
WO2008018117A1 true WO2008018117A1 (fr) 2008-02-14

Family

ID=39032662

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/315611 WO2008018117A1 (fr) 2006-08-07 2006-08-07 Fauteuil

Country Status (2)

Country Link
CN (1) CN101505634A (fr)
WO (1) WO2008018117A1 (fr)

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WO2010087760A1 (fr) * 2009-01-29 2010-08-05 Officeline Ab Chaise de bureau
EP2298131A1 (fr) * 2009-09-16 2011-03-23 Haworth GmbH Siège doté d'un réglage de profondeur d'assise
US9004597B2 (en) 2012-09-20 2015-04-14 Steelcase Inc. Chair back mechanism and control assembly
JP2018015425A (ja) * 2016-07-29 2018-02-01 株式会社吉田製作所 歯科用椅子
CN109996467A (zh) * 2016-12-20 2019-07-09 国誉株式会社 椅子
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering

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JP6215659B2 (ja) * 2013-11-12 2017-10-18 コクヨ株式会社 椅子

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JP2003534876A (ja) * 2000-06-07 2003-11-25 センター フォア デザイン リサーチ アンド ディベロプメント ナームローゼフェンノートチャップ 椅 子

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010087760A1 (fr) * 2009-01-29 2010-08-05 Officeline Ab Chaise de bureau
US8651574B2 (en) 2009-01-29 2014-02-18 Lt Office Line Ab Office chair
EP2298131A1 (fr) * 2009-09-16 2011-03-23 Haworth GmbH Siège doté d'un réglage de profondeur d'assise
US9345328B2 (en) 2012-09-20 2016-05-24 Steelcase Inc. Chair assembly with upholstery covering
US9462888B2 (en) 2012-09-20 2016-10-11 Steelcase Inc. Control assembly for chair
US9022476B2 (en) 2012-09-20 2015-05-05 Steelcase Inc. Control assembly for chair
US9027997B2 (en) 2012-09-20 2015-05-12 Steelcasel Inc. Chair assembly
US9027999B2 (en) 2012-09-20 2015-05-12 Steelcase Inc. Control assembly for chair
US9027998B2 (en) 2012-09-20 2015-05-12 Steelcase Inc. Chair assembly
US9049935B2 (en) 2012-09-20 2015-06-09 Steelcase Inc. Control assembly for chair
USD742677S1 (en) 2012-09-20 2015-11-10 Steelcase Inc. Chair
USD742676S1 (en) 2012-09-20 2015-11-10 Steelcase Inc. Chair
US9004597B2 (en) 2012-09-20 2015-04-14 Steelcase Inc. Chair back mechanism and control assembly
US9451826B2 (en) 2012-09-20 2016-09-27 Steelcase Inc. Chair assembly
US9010859B2 (en) 2012-09-20 2015-04-21 Steelcase Inc. Chair assembly
US9492013B2 (en) 2012-09-20 2016-11-15 Steelcase Inc. Chair back mechanism and control assembly
US9526339B2 (en) 2012-09-20 2016-12-27 Steelcase Inc. Control assembly for chair
US9844267B2 (en) 2012-09-20 2017-12-19 Steelcase Inc. Chair back mechanism and control assembly
US9861201B2 (en) 2012-09-20 2018-01-09 Steelcase, Inc. Chair assembly
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US9918552B2 (en) 2012-09-20 2018-03-20 Steelcase Inc. Control assembly for chair
US10206507B2 (en) 2012-09-20 2019-02-19 Steelcase Inc. Control assembly for chair
JP2018015425A (ja) * 2016-07-29 2018-02-01 株式会社吉田製作所 歯科用椅子
CN109996467A (zh) * 2016-12-20 2019-07-09 国誉株式会社 椅子

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