JP6572266B2 - Chair - Google Patents

Chair Download PDF

Info

Publication number
JP6572266B2
JP6572266B2 JP2017130763A JP2017130763A JP6572266B2 JP 6572266 B2 JP6572266 B2 JP 6572266B2 JP 2017130763 A JP2017130763 A JP 2017130763A JP 2017130763 A JP2017130763 A JP 2017130763A JP 6572266 B2 JP6572266 B2 JP 6572266B2
Authority
JP
Japan
Prior art keywords
back frame
left
backrest
body
right
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2017130763A
Other languages
Japanese (ja)
Other versions
JP2017200599A5 (en
JP2017200599A (en
Inventor
エリック チャン
エリック チャン
誠太郎 河本
誠太郎 河本
Original Assignee
株式会社イトーキ
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
Family has litigation
Priority to US201361831763P priority Critical
Priority to US61/831,763 priority
Application filed by 株式会社イトーキ filed Critical 株式会社イトーキ
Publication of JP2017200599A publication Critical patent/JP2017200599A/en
Publication of JP2017200599A5 publication Critical patent/JP2017200599A5/ja
Application granted granted Critical
Publication of JP6572266B2 publication Critical patent/JP6572266B2/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=52008259&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP6572266(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/44Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/46Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/46Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462Support 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

Description

  The present invention relates to a chair, and is particularly suitable for a chair used in an office.

  The first of the elements that the chair should hold is the comfort of the user. In particular, comfort is an important factor because chairs used in offices keep people sitting for a long time. There are several factors that impede comfort, but typically there are a feeling of pressure due to a hard part that hits the body and a tight feeling that makes it difficult to move the body. Therefore, measures are taken to reduce the feeling of pressure and tightness.

  The problem of pressure is dealt with by placing cushions on the seat and back, or by configuring the seat and back with a mesh. Adopting a deformable structure for the seat plate and the backrest plate is also effective for improving the softness.

  On the other hand, in order to prevent or reduce the feeling of cramping, it is only necessary to allow the body to move while sitting. Giving the chair a rocking function is an effective means for relieving the feeling of cramping. However, there is a limit to improving comfort with only a locking function. This is because a person takes various postures while seated, but a simple rocking function cannot follow changes in the posture of the person.

  For example, it is normal for a seated person to turn the body and turn sideways, but if the backrest has a rigid structure, the person's twisting the body will reduce the contact area with the backrest. The user receives a feeling of pressure and comfort is reduced.

Therefore, ingenuity has been made to improve the followability of the backrest to the movement of the body. As an example, in Patent Documents 1 to 4, the backrest is supported by a back frame at three locations, the left and right upper portions and the left and right middle portions, as a structure that can deform the backrest with the body pressure of the seated person. It is described to do.

  If the backrest is freely deformed by the body pressure of the seated person, the stability of the body is impaired and the comfort is inferior. In other words, the backrest is required to have a function to firmly support the body. In particular, when a person sits on a chair and performs various desk work, if the body is bent forward, the internal body will be stressed and the burden on the body will increase, so even if the person is not locked, It can be said that it is highly necessary to support and keep the back straight.

Looking at the patent literature in terms of stable support features such body, since the backrest of the patent documents has become three-point support of the left and right intermediate portions of the left and right two places and a lower end of the upper, excessive It can be said that there is no deformation. However, since the lower part of the backrest is easily deformed, it cannot be said that the function of firmly supporting the body in the non-locking state and holding the back muscles extended is high. That is, each patent document may not have a sufficient body stable support function in a non-locking state.

Also, as a use mode of the chair, it is common to twist the body to the right or left or shift the shoulder to the left or right in a locked state, and in this case, the load concentrates on the left or right side of the upper part of the backrest, In each patent document , since the upper part of the backrest is difficult to deform, it cannot be said that the followability with respect to changes in posture of the body is high, and there is room for improvement in this aspect as well.

The back of the chair is often provided with a resin back plate. However, as a means to relieve pressure and improve cushioning and fit, the back plate is made to have a flexible structure. For example, the applicant of the present application disclosed in Patent Document 5 that the body support portion is formed of a multi-stage band plate group by providing a multi-stage long groove on the back plate. In Patent Document 5, each strip is provided with thin trimming grooves at the left and right ends in order to facilitate deformation.

On the other hand, Patent Document 6 discloses a back plate having a form similar to a honeycomb structure, and Patent Document 7 discloses a net-like structure by regularly arranging cross-shaped holes and straight holes. The backrest made is disclosed.

In Patent Document 6 and Patent Document 7, the body support part of the backrest is formed as a mesh structure, and each group of thin lines forming the body support part is bent. Deformation is allowed, and as a result, the entire body support portion can be deformed so as to be recessed rearward.

  Now, considering the support function of the body by the backrest, it is not necessary to have a high degree of flexibility, and the function of stably supporting the body is also important. For example, if the body tends to sway in the rocking state, comfort may be lost.

  In addition, when a seated person performs deskwork such as operating a personal computer in a non-locking state, it is preferable that the waist is firmly supported because it is held in an appropriate posture with the back straight, but the flexibility of the backrest is high. If too much, the body cannot be supported stably.

Patent Documents 6 and 7 are a kind of mesh structure that is easily deformed as a whole. Therefore, although cushioning is high, there is room for improvement in terms of stable body support. Yeah. On the other hand, the band plate of Patent Document 5 is excellent in support stability of the body because it does not stretch and deform excessively, but there is room for improvement in terms of flexibility because there is a limit to the elongation of each band plate. It can be said.

Japanese Patent Publication No. 2002-119366 Japanese Patent Publication No. 2004-129966 Japanese Patent Publication No. 2010-063831 U.S. Pat. No. 7,249,802 Japanese Patent Publication No. 2011-041615 Japanese Patent No. 4015673 U.S. Pat. No. 5,934,758

  The present invention has been made against the background of such a situation, and intends to provide a chair that is improved in use value and improved. In addition, the present application includes many improved configurations, and may be provided.

The present invention is specified in each claim.

The present invention
"Seat and backrest, and comprises a back frame of placement has been rigid structure behind the seat back,
The backrest includes a synthetic resin back frame body that forms the periphery of the backrest, and a body support portion that is surrounded by the back frame body. Left and right side members, left and right longitudinal upper members constituting the upper end portion, and lower members constituting the lower end portion. ''
This is the basic configuration.

And, the invention of claim 1 is the above basic configuration,
"The back frame has a left and right vertically long member and a connecting portion to which the left and right vertically long members are connected,
The upper member of the back frame is attached to the connecting portion of the back frame, and the left and right side members of the back frame are attached to the left and right vertically long members of the back frame, respectively . the back frame has a lower end be supported in a state of three-point supported by the back frame is a free end,
And the back frame is supported by the back frame in a state of being able to rotate in the front-rear direction against the elasticity of the back frame. ''
The structure is added.

According to a second aspect of the present invention, in the basic configuration,
"The back frame has a left and right vertically long member and a connecting portion to which the left and right vertically long members are connected,
The left and right side members of the frame body are respectively attached to the left and right vertically long members of the back frame at midway height positions. Therefore, the back frame body is supported by the back frame in a three-point support state and has a lower end. Is the free end,
And site between the attachment portion between the mounting portion and the left and right side members of the upper frame member of the back frame body is adapted to deform available-bending by the body pressure of a seated person "
The structure is added.

According to a third aspect of the present invention, in the basic configuration,
"The back frame has a left and right vertically long member and a connecting portion to which the left and right vertically long members are connected,
The upper member of the back frame is attached to the connecting portion of the back frame, and the left and right side members of the back frame are attached to the left and right vertically long members of the back frame, respectively . the back frame has a lower end be supported in a state of three-point supported by the back frame is a free end,
And, the body support part can be deformed so as to be recessed backward by the body pressure of the seated person. ' '
The structure is added.

According to a fourth aspect of the present invention, in the basic configuration,
"The back frame has a left and right vertically long member and a connecting portion to which the left and right vertically long members are connected,
The upper member of the back frame is attached to the connecting portion of the back frame, and the left and right side members of the back frame are attached to the left and right vertically long members of the back frame, respectively. The back frame is supported in a three-point supported state on the back frame, and the lower end is a free end,
And site between the attachment portion between the mounting portion and the left and right side members of the upper frame member of the back frame, while that is a modification available-bending by the body pressure of a seated person, the body support unit It can be deformed to dent backwards by the body pressure of the seated person. ''
The structure is added.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the body support portion is configured by a group of thin stays integrally formed with the back frame, and the group of stays is The posture is a horizontally long or vertically long posture, the adjacent stays are connected by a connecting piece, and the width of the stay is smaller than the interval between the adjacent stays.

A sixth aspect of the present invention is the method according to any one of the first to fourth aspects, wherein the body support portion is formed of a mesh material that is a separate member from the back frame body, and the mesh material is the back frame body. Installed on.

The invention of claim 7 is the above basic configuration,
"The back frame has a left and right vertically long member and a connecting portion to which the left and right vertically long members are connected,
The upper member of the back frame is attached to the connecting portion of the back frame, and the left and right side members of the back frame are attached to the left and right vertically long members of the back frame, respectively . the back frame has a lower end be supported in a state of three-point supported by the back frame is a free end,
And the said body support part is the structure provided with many left-right laterally or vertically long stays integrally molded by the said back frame body, or the structure which consists of a mesh material separate from the said back frame body It is allowed to dent and deform backwards due to the body pressure of the seated person. ' '
The structure is added.

In each invention of the present application, the backrest is supported at three points by the upper end portion and the two left and right portions. And, when the user is sitting without leaning on the backrest to perform desk work such as PC operation, the lumbar part etc. can be stably supported by the part supported by the left and right points of the backrest. it can. Therefore, the state where the back is stretched can be accurately maintained, and the user can take an appropriate working posture.
According to the present invention, comfort in a state of leaning on a chair is improved .

1A and 1B are views showing the overall appearance of a chair according to an embodiment, in which FIG. 1A is a perspective view seen from the front, and FIG. 1B is a perspective view seen from the rear. 2A and 2B are views showing the overall configuration of the chair, in which FIG. 2A is a partially separated perspective view, and FIG. 2B is a side view. 3A and 3B are separated views of the main part, in which FIG. 3A is a view showing a state in which the backrest is shifted in a normal posture, and FIG. 3B is a view in which the backrest is horizontally turned and separated. 4A and 4B are diagrams showing the relationship between the support device and the back frame, wherein FIG. 4A is a perspective view of the upper support device and the back frame, and FIG. 4B is a perspective view of the upper support device, the side support device, and the backrest. (C) is a separation perspective view of a side support device and a backrest. FIG. 5 is a separation view showing the relationship between the upper support device and the backrest. FIG. 6 is a separation view showing the relationship between the side support device and the backrest. FIG. 7 is an explanatory view of a lumbar support member, (A) and (B) are separated perspective views, and (C) is a plan view of a backrest. FIG. 8 is a front view of the backrest. FIG. 9 is a perspective view of the backrest as seen from the front. FIG. 10 is a perspective view of the backrest as seen from behind. FIG. 11 is a separation diagram for explaining the function.

Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment is applied to a swivel chair often used in an office or the like. Although using word "longitudinal", "lateral" to identify the direction within the following embodiments and appended claims, these directions, based on the normal sitting person's orientation in the chair Yes.

(1). As chair Overview Figure 1, the chair is provided with a leg unit 1 and the seat 2 and the backrest 3 as a main element, the backrest 3 is attached to the back frame 4 disposed behind It has been. The leg device 1 includes a leg support 5 in a vertical posture and a center tube 6 that supports the leg column 5, and five branch arms extend in the radial direction from the center tube 6. A caster is attached to the tip of each branch arm.

  The leg support 5 is composed of an extendable gas cylinder having an inner cylinder and an outer cylinder. As shown in FIG. 2B, a base 7 is attached to the upper end of the leg support 5 and the back frame 4 is attached to the base 7. Are connected via a joint member 8 so as to be tiltable backward. The back frame 4 and the joint member 8 can be integrated. The inner cylinder and the outer cylinder constituting the leg column 5 are rotatable relative to each other. Therefore, the base 7 (and the seat 2 and the backrest 3) can be rotated horizontally.

  Although not shown, the base 7 incorporates a locking spring that elastically supports the rearward tilting of the back frame 4. The seat 2 is attached so that an intermediate member (not shown) provided on the base 7 can be moved backward while being tilted rearward around the front portion. The intermediate member and the joint member 8 are connected to each other so as to be capable of relative movement with a horizontally long shaft. For this reason, the seat 2 tilts backward while moving backward in conjunction with the backward tilt of the backrest 3.

The backrest 3 is manufactured by an injection molding method using a resin such as polypropylene as a material .

The backrest 3 includes a back frame member 9 constituting the outer periphery, is made from the body supporting portion 10 for positioned therein. As shown in FIG. 8, the back frame body 9 has a pair of side members 9 a that constitute both the left and right sides, a horizontally long upper member 9 b that constitutes the upper end portion, and a left and right horizontally elongated lower member 9 c that constitutes the lower end. It is formed in a form close to.

  The lower end of the backrest 3 is located in the vicinity of the seat surface. A lumbar support member 11 that supports the waist of the seated person is disposed on the front surface of the backrest 3 at a height corresponding to the waist of the seated person. Since the height and preference of the seated person varies, the lumbar support member 11 can be adjusted in height.

  The backrest 3 of the present embodiment has a constricted shape so that the attachment portion of the lumbar support member 11 is the narrowest. However, it is not necessary to be limited to this, and as the form of the backrest 3, the lateral width is substantially constant, the inverted trapezoidal shape having a wide upper end and a narrow lower end, or an inverted base having a narrow upper end and a wide lower end Arbitrary forms, such as a shape, can be adopted.

For example, as shown in FIG. 3, the back frame 4 has left and right vertically long members 4a that are inclined so as to approach each other as the distance therebetween increases. The upper ends of the left and right vertically long members 4a are integrally connected via a connecting portion 4b.

Accordingly, the left and right vertical members 4a form an inverted V shape. The lower ends of the left and right vertically long members 4a are integrally connected via a lower stay portion 4c. Further, a forward-facing arm portion 4d is integrally provided at the lower ends of the left and right vertically long members 4a. The forward arm portion 4d and the lower stay portion 4c are connected to the joint member 8 shown in FIG. For example, as is clear from FIG. 4B, the longitudinal member 4a of the back frame 4 is formed in an L-shaped cross section having a back plate and a side plate. For this reason, although it is lightweight, it has a structure resistant to the front-rear direction, the left-right direction, and torsion.

  The back frame 4 of the present invention employs a resin molded product or an aluminum die-cast product, but can also be manufactured using a metal plate or metal pipe as a material. It is also possible to make a composite product of different materials. In addition, it is not necessarily an integral structure, and for example, the left and right vertically long members 4a may be separately manufactured and connected at the upper end, and may be configured by a plurality of parts. It is also possible to employ a shell structure product for the back frame 4.

For example, as shown in FIG. 3, the left and right intermediate portions of the upper member 9 b constituting the back frame body 9 of the backrest 3 are attached to the connecting portion 4 b at the upper end of the back frame 4 via the upper holding device 12. The left and right side members 9 a of the back frame body 9 are attached to the vertically long member 4 a of the back frame 4 via the side support device 13 at a portion above the attachment portion of the lumbar support member 11. This point will be described in detail below.

(2). As shown in mounting structure of the backrest Figure 4 (A) (B), the upper support device 12 has two spring portions 12a disposed on the front V shaped. A left and right horizontally long upper mounting portion 12b is integrally connected to the upper end of the spring portion 12a. And the lower attachment part 12c which protruded back is integrally connected to the lower end of the right-and-left spring board part 12a. The upper support device 12 is manufactured by injection molding using a resin such as polypropylene, and the spring plate portion 12a has a vertically long posture, but is wide in a front view and narrow in a side view. Is made. For this reason, it can be easily bent and deformed by the force from the front.

The lower mounting portion 12c is formed in a horizontally long block shape (boss shape). In the connecting portion 4b of the back frame 4, a rear first concave portion 15 of a forward opening into which the lower mounting portion 12c is fitted is formed. The lower attachment portion 12c is fixed to the rear first recess 15 by a first bolt 16 inserted from below. 4 as (A), the attachment portion 12c of the upper support device 12, the nut insertion hole 17 for the first bolt 16 sets the threaded Murrell nut is opened rearward.

As shown in FIG. 5, the upper member 9b of the backrest 3 has inner and outer triple structure having an outer wall and an inner wall 18 and the intermediate wall 1 9, the elongated groove 20 of the two rows that is opened rearward for the formation Has been. And the front side 1st recessed part 21 in which the upper attachment part 12b of the upper support apparatus 12 fits is formed by notching the left-right intermediate part of the inner wall 19, for example. On the mounting portion 12b of the upper support device 12 is fixed to the second bolt 2 2 Thus the upper member 9b which is inserted from below.

The upper member 9b of the backrest 3 is formed with a nut holding portion 23 that opens rearward. On the other hand, a stopper piece 24 is provided on the upper mounting portion 12b of the upper support device 12 so as to protrude upward from the nut holding portion 23 of the upper member 9b.

The side support device 13 is manufactured using, for example, a resin having high rigidity such as nylon resin. As shown in FIGS. 5B and 5C, the side support device 13 includes a belt-like arm portion 13a that is gently bent in a waveform in plan view. A rear boss portion 13b is integrally provided at the rear end of the arm portion 13a, and a front boss portion 13c is integrally provided at the front end of the arm portion 13a. Arm unit 13a, the thus simplifying the body pressure of the occupant has a stiffness which is not deformed (although it may be a little deformed.).

The rear boss portion 13 b is fitted into a rear second concave portion 25 provided on the vertically long member 4 a of the back frame 4. A third bolt 26 is inserted into the rear second concave portion 25 from below. A nut (not shown) into which the third bolt 26 is screwed is incorporated in the rear boss portion 13 b of the side support device 13. The rear boss portion 13b is provided with a flange 13d that overlaps the opening edge of the rear second concave portion 25.

As clearly shown in FIG. 6, a front second concave portion 27 into which the front boss 13 c of the side support device 13 is fitted is formed in the side member 9 a of the backrest 3. Front second recess 27 generally has the shape of a box-like appearance, the inner wall thereof 27a, bolts (not shown) which after a short bolt holes 28 through which. On the other hand, the front boss portion 13 c of the side support device 13 is provided with a nut mounting groove 29, and a bolt is screwed into a nut disposed in the nut mounting groove 29.

In this case, the inner plate 25a of the front second concave portion 27 is formed with a step portion 30 for increasing the strength by thickening the bolt hole 28 portion. On the other hand, the front boss 13c of the side support device 13 is formed with a notch 31 that overlaps the step 30 of the front second recess 27. The front boss portion 13 c of the side support device 13 is provided with a flange 13 e that overlaps the opening edge of the front second concave portion 27.

(3). Lumber Support Member Next, the lumbar support member 11 will be described mainly with reference to FIG. The lumbar support member 11 is a molded product made of a resin, and is made of a material having a certain degree of elasticity, such as polypropylene. The lumbar support member 11 has a laterally long shape that crosses the backrest 3 and is gently curved in a concave shape in a plan view. Further, the lumbar support member 11 is slightly curved in a forward projecting shape when viewed in a longitudinal side view.

  The left and right ends of the lumbar support member 11 are integrally formed with a slide boss body 34 that protrudes rearward in a prismatic shape. The slide boss body 34 is slidably fitted to a vertically long guide frame portion 35 provided on the side member 9 a of the backrest 3. As shown in FIG. 6, the inner periphery of the guide frame portion 35 is configured by a plate portion, and the above-described front second concave portion 27 is integrally connected to the upper end of the guide frame portion 35.

  As shown in FIG. 7, a block-like forward projecting portion 36 a provided on the knob 36 is fitted to the rear end of the slide boss body 34. The forward projecting portion 36a of the knob 36 is fixed to the slide boss body 34 by a bolt (not shown). The slide boss body 34 is provided with a nut insertion groove 37. The lumbar support member 11 can hold the height stepwise, and as a height adjusting means, as shown in FIG. Provided.

  Now, providing a lumbar support member on the backrest is widely performed, but generally it is often arranged on the back side of the cushion or the back side of the mesh material. However, if a cushion or mesh material is interposed between the lumbar support member and the body, it may feel unsatisfactory for a person who seeks a strong “feel”. In some cases, such as when the backrest is not provided with a cushion or mesh, the lumbar support member must be disposed in front of the back plate.

  As an example, Japanese Patent Publication No. 2008-237333 discloses that a backrest is composed of a frame portion and a back plate inside the frame, and a plurality of slits are provided in the back plate. It is disclosed to arrange in front. In this document, a clip-type handle that is fitted to the frame portion from the outside is integrally provided at both left and right end portions of the lumbar support member, and the frame portion is elastically held by the handle.

  However, in the configuration in which the handle is fitted from the outside as in this publication, since the handle protrudes to the left and right outside of the frame portion, a person's clothes are caught on the handle, or an object hits the handle and the handle is damaged. Is concerned. Further, since the handle only holds the height by friction, the lumbar support member may slide down or rise up due to the body pressure of the seated person.

On the other hand, in this embodiment, since the slide bosses 34 provided at the left and right end portions of the lumbar support member 11 penetrate the guide frame portion 35 of the back frame body 9, the knob 36 is located on the left and right outer sides of the back frame body 9. It can arrange so that it may not protrude. Thereby, it can prevent or remarkably prevent that clothes are caught on the knob 36 or an object hits it. In addition, since it is easy to provide the guide frame portion 35 with a means for holding the height of the stopper hole 38 for adjusting the height, the lumbar support member 11 can be held at a desired height and cannot be moved.

  The height adjusting means can employ various configurations. When the stopper hole 38 is provided in the guide frame portion 35 as in the embodiment, an elastic member that fits and detaches from the guide frame portion 35 may be provided in the block-like forward projecting portion of the knob 36. Since the guide frame portion 35 has a certain width in the front-rear direction, there is no reduction in strength due to the penetration of the slide boss body 34. The knob 36 can be simply plate-shaped and screwed to the slide boss body 34.

(4). Structure of the backrest Next, details of the structure of the body supporting portion 10 of the backrest 3 will be described with reference mainly to Figures 8-10. As shown in FIG. 8, in the present embodiment, the body support portion 10 includes the horizontally long side stays 40 connected to the left and right side members 9 a of the back frame body 9 and the horizontally long side stays 40 positioned between the side stays 40. A group of center stays 41 is provided, and the groups of both stays 40 and 41 are arranged in a vertically displaced state. A center area is constituted by a group of center stays 41, and a side area is constituted by a group of side stays 40.

The left and right ends of the center stay 41 adjacent to the left and right and the tip of the side stay 40 are integrally connected by a connecting piece (joint stay) 42. In this case, there is a little left-right distance between the tip of the side stay 40 and the end of the center stay 41, and thus the connecting piece 42 is in an inclined posture in front view. Furthermore, since the center stay 41 and the side stay 40 are arranged so as to be displaced in the vertical direction, the connecting pieces 42 adjacent to each other in the vertical direction are in opposite directions. And the base of the connection piece 42 adjacent to the upper and lower sides and the stays 40 and 41 are integrally connected. Accordingly, the group of the connecting pieces 42 has a zigzag shape in front view.

The backrest 3 is confined in a front view so that the lower portion is narrow. For this reason, the side member 9a of the backrest 3 is also curved outwardly, but the connecting piece 42 is also It curves outwardly in a concave shape so as to follow the shape of the side member 9a. Further, the side member 9a and the center stay 41 have substantially the same left and right lengths.

The side stay 40 and the center stay 41 have a plate-like structure in which the front and rear surfaces are wide surfaces. As shown in FIG. 10, ribs 43 are integrally provided on the rear surfaces of the side stay 40 and the center stay 41. Yes. Accordingly, the cross-sectional shapes of the side stay 40 and the center stay 41 are laterally T-shaped. The rear surface of the rib 43 is flush with the rear surface of the connecting piece 42. The connecting piece 42 has the appearance of a thin strip, and therefore can be easily deformed so that the angle of the lateral direction V widens or narrows. That is, in the lumbar support member 11 , the density of the stays 40 and 41 is high. For this reason, the lumbar support part has higher rigidity than other parts.

  Since the group of the side stays 40 and the center stays 41 are arranged in multiple stages, left and right horizontally long spaces 44 are vacant between the side stays 40 adjacent to each other vertically and between the center stays 41. . In the present embodiment, the vertical width dimension of the space 44 is about twice the vertical width of the stays 40 and 41 except for the lumbar support portion. In the lumbar support portion, the vertical width dimension of the space 44 is set to be the same as the vertical width of the stays 40 and 41. For this reason, the lumbar support portion has high rigidity.

  Of course, the vertical width and pitch (density) of the side stay 40 and the center stay 41 can be arbitrarily set. For example, the vertical width dimension of the stays 40 and 41 and the space 45 can be set to the same level over the entire vertical direction. The vertical width dimension of the stays 40 and 41 can be made smaller than the vertical width dimension of the space 45 throughout.

In the present embodiment, the body support portion 10 is configured by the two rows of side stays 40 and the one row of center stays 41. However, the body support portion 10 is not limited to this, and the left and right sides are not provided without providing the center stays 41. It is also possible to configure the stay 40 with a single connecting piece 42 that connects the stay 40, or with two rows of side stays 40 and two rows of intermediate stays positioned therebetween. When two rows of intermediate stays are provided, three connecting pieces 42 are required. Furthermore, the body support portion 10 can also be constituted by five rows of stay groups of two rows of side stays 40, one row of center stays 41, and two rows of intermediate stays. Furthermore, the backrest 3 can adopt other forms.

(5) Summary Next, the operation will be described with reference to FIG. 11 (this description assumes a state in which a person with a general weight / physique is using). First, the locking state will be described.

For example, the body pressure of the seated person in the rocking state acts on the backrest 3 from the front as shown by the arrow F, and the load acting on the backrest 3 is supported by the upper support device 12 and the side support device 13. The upper support device 12 can be bent and deformed in a side view so that the upper end moves rearward by a load from the front as indicated by an arrow Y in FIG. 11, while the side support device 13 is deformed by an arrow X in FIG. As shown, the tip can be bent and deformed in plan view so that it moves backward, but since the side support device 13 has high rigidity, the back frame 4 of the backrest 3 is firmly held by the side support device 13, The waist of the seated person is held stably.

On the other hand, the moment due to locking greatly affects the backrest 3 on the upper end, but the upper support device 12 is lower in rigidity than the side support device 13 and easily deforms due to body pressure. 3 can be deformed as its upper end approaches the upper end of the back frame 4. That is, it can rotate in the front-rear direction. This bending deformation of the backrest 3 can improve the cushioning property at the time of locking.

In addition, when a person twists the upper body to the right or left in the locked state or shifts the shoulder to the right or left, the two left and right spring portions 12a constituting the upper support device 12 bend and deform unevenly. Thus, the backrest 3 can be deformed so as to be twisted following the twisting or shifting of the body. Therefore, the backrest 3 can be made to follow changes in the posture of the body, and as a result, comfort can be improved.

As apparent from FIG. 11, the backrest 3 are curved loosely forward concave in plan view, the degree of curvature They become largest at around the lumbar support member 11, the upper end portion almost become a flat state Yes. For this reason, it is easy to shift the shoulder (or a portion close to the shoulder) to the left and right while holding the waist portion so as not to be shifted to the left and right. From this point, high comfort can be obtained.

As shown in FIG. 2B, in the neutral state where the seated person is not leaning on the backrest 3, the backrest 3 is slightly tilted backward, and the lumbar support member 11 is located at the foremost position. When the user performs desk work such as operating a personal computer, the user takes a posture in which his / her waist is placed on the lumbar support member 11 of the backrest 3, but the side support device 13 has a high rigidity, so that the seater's posture is neutral. The back 3 is not bent and deformed by the body pressure, and the human waist is stably supported by the back 3. For this reason, the upper body of the user is held in a preferable posture in which the back is not stretched and the back is stretched. Therefore, the posture maintaining function in the neutral state (non-locking state) is also excellent.

The backrest 3 of the present embodiment is such that the side support 40 and the center stay 41 are displaced up and down, and the connecting piece 42 is in a zigzag form, so that the body support portion 10 is reared by the body pressure of the seated person. It can bend and deform so as to swell. For this reason, while being excellent in the fitting property to a user's body, it is excellent also in the followable | trackability to a body movement.

Further, the connecting pieces 42 adjacent to each other in the vertical direction are deformed so as to reduce the mutual opening angle (V angle), whereby the center stay 41 tends to shift backward, and as a result, the body support portion 10 is deformed so as to expand backward. For this reason, cushioning properties and fit to the user's body can be improved.

  This application is based on a US provisional application (61 / 831,763) filed on June 6, 2013, the contents of which are incorporated herein by reference.

  According to the present invention, a chair with improved comfort in a leaning state can be provided. Furthermore, it is possible to provide a chair that can ensure strength and save manufacturing effort and prevent variation in quality.

DESCRIPTION OF SYMBOLS 1 Leg apparatus 2 Seat 3 Backrest 4 Back frame 5 Leg support 6 Center cylinder 7 Base 8 Joint member 9 Back frame 9a Side member 9b Upper member 9c Lower member 10 Body support part 11 Lumber support member 12 Upper support apparatus 12a Spring part 12b Upper mounting portion 12c Lower mounting portion 13 Side support device 13a Arm portion 13b Rear boss portion 13c Front boss portion 13e Flange 15 Rear first recess 16 First bolt 18 Inner wall 19 Intermediate wall 22 Second bolt 23 Nut holder 24 Stopper piece 25 Back side second recess 25a Inner plate 26 Third bolt 27 Front side second recess 28 Bolt hole 29 Nut mounting groove 30 Step portion 31 Notch portion 34 Slide boss body 35 Guide frame portion 36 Knob 36a Forward projecting portion 37 Nut Insertion groove 38 Stopper hole 0 side stay 41 center stay 42 coupling piece 43 the rib 44 space 45 space

Claims (7)

  1. A seat and a backrest, and a back frame having a rigid structure disposed behind the backrest,
    The backrest includes a synthetic resin back frame body that forms the periphery of the backrest, and a body support portion that is surrounded by the back frame body. Left and right side members, left and right upper members constituting the upper end, and a lower member constituting the lower end,
    The back frame has left and right vertically long members, and a connecting portion connected to the left and right vertically long members,
    The upper member of the back frame is attached to the connecting portion of the back frame, and the left and right side members of the back frame are attached to the left and right vertically long members of the back frame, respectively . the back frame has a lower end be supported in a state of three-point supported by the back frame is a free end,
    And the back frame is supported by the back frame in a state in which it can rotate in the front-rear direction against the elasticity of the back frame.
    Chair.
  2. A seat and a backrest, and a back frame having a rigid structure disposed behind the backrest,
    The backrest includes a synthetic resin back frame body that forms the periphery of the backrest, and a body support portion that is surrounded by the back frame body. Left and right side members, left and right upper members constituting the upper end, and a lower member constituting the lower end,
    The back frame has left and right vertically long members, and a connecting portion connected to the left and right vertically long members,
    The upper member of the back frame is attached to the connecting portion of the back frame, and the left and right side members of the back frame are attached to the left and right vertically long members of the back frame, respectively. The back frame is supported in a three-point supported state on the back frame, and the lower end is a free end,
    And site between the attachment portion between the mounting portion and the left and right side members of the upper frame member of the back frame body is adapted to deform available-bending by the body pressure of a seated person,
    Chair.
  3. A seat and a backrest, and a back frame having a rigid structure disposed behind the backrest,
    The backrest includes a synthetic resin back frame body that forms the periphery of the backrest, and a body support portion that is surrounded by the back frame body. Left and right side members, left and right upper members constituting the upper end, and a lower member constituting the lower end,
    The back frame has left and right vertically long members, and a connecting portion connected to the left and right vertically long members,
    The upper member of the back frame is attached to the connecting portion of the back frame, and the left and right side members of the back frame are attached to the left and right vertically long members of the back frame, respectively . the back frame has a lower end be supported in a state of three-point supported by the back frame is a free end,
    And the body support part can be deformed so as to be recessed backward by the body pressure of the seated person.
    Chair.
  4. A seat and a backrest, and a back frame having a rigid structure disposed behind the backrest,
    The backrest includes a synthetic resin back frame body that forms the periphery of the backrest, and a body support portion that is surrounded by the back frame body. Left and right side members, left and right upper members constituting the upper end, and a lower member constituting the lower end,
    The back frame has left and right vertically long members, and a connecting portion connected to the left and right vertically long members,
    The upper member of the back frame is attached to the connecting portion of the back frame, and the left and right side members of the back frame are attached to the left and right vertically long members of the back frame, respectively. The back frame is supported in a three-point supported state on the back frame, and the lower end is a free end,
    And site between the attachment portion between the mounting portion and the left and right side members of the upper frame member of the back frame, while that is a modification available-bending by the body pressure of a seated person, the body support unit , Can be deformed to dent backwards by the body pressure of the seated person,
    Chair.
  5. The body support portion is composed of a group of thin stays integrally formed on the back frame body, the group of stays is in a horizontally long or vertically long posture, and adjacent stays are connected by a connecting piece. Furthermore, the width of the stay is smaller than the interval between adjacent stays.
    The chair as described in any one of Claims 1-4.
  6. The body support portion is made of a mesh material that is a separate member from the back frame, and the mesh material is attached to the back frame.
    The chair as described in any one of Claims 1-4.
  7. A seat and a backrest, and a back frame having a rigid structure disposed behind the backrest,
    The backrest includes a synthetic resin back frame body that forms the periphery of the backrest, and a body support portion that is surrounded by the back frame body. Left and right side members, left and right upper members constituting the upper end, and a lower member constituting the lower end,
    The back frame has left and right vertically long members, and a connecting portion connected to the left and right vertically long members,
    The upper member of the back frame is attached to the connecting portion of the back frame, and the left and right side members of the back frame are attached to the left and right vertically long members of the back frame, respectively . the back frame has a lower end be supported in a state of three-point supported by the back frame is a free end,
    And the said body support part is the structure provided with many left-right laterally or vertically long stays integrally molded by the said back frame body, or the structure which consists of a mesh material separate from the said back frame body It is allowed to dent and deform backwards due to the body pressure of the seated person,
    Chair.
JP2017130763A 2013-06-06 2017-07-04 Chair Active JP6572266B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US201361831763P true 2013-06-06 2013-06-06
US61/831,763 2013-06-06

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2015248149 Division 2014-06-06

Publications (3)

Publication Number Publication Date
JP2017200599A JP2017200599A (en) 2017-11-09
JP2017200599A5 JP2017200599A5 (en) 2017-12-21
JP6572266B2 true JP6572266B2 (en) 2019-09-04

Family

ID=52008259

Family Applications (4)

Application Number Title Priority Date Filing Date
JP2015521502A Active JP6353443B2 (en) 2013-06-06 2014-06-06 Chair
JP2015248149A Active JP6353433B2 (en) 2013-06-06 2015-12-21 Chair back
JP2017130763A Active JP6572266B2 (en) 2013-06-06 2017-07-04 Chair
JP2018147380A Pending JP2018187443A (en) 2013-06-06 2018-08-06 Chair

Family Applications Before (2)

Application Number Title Priority Date Filing Date
JP2015521502A Active JP6353443B2 (en) 2013-06-06 2014-06-06 Chair
JP2015248149A Active JP6353433B2 (en) 2013-06-06 2015-12-21 Chair back

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP2018147380A Pending JP2018187443A (en) 2013-06-06 2018-08-06 Chair

Country Status (4)

Country Link
US (1) US20160135603A1 (en)
JP (4) JP6353443B2 (en)
CN (1) CN105263367A (en)
WO (1) WO2014196630A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9560917B2 (en) * 2014-11-26 2017-02-07 Steelcase Inc. Recline adjustment system for chair
CA2981528A1 (en) * 2015-04-13 2016-10-20 Steelcase Inc. Seating arrangement
DE102016102556A1 (en) * 2016-02-15 2017-08-17 Interstuhl Büromöbel GmbH & Co. KG Backrest for an office chair
US9713385B1 (en) * 2016-03-16 2017-07-25 Oasyschair Co., Ltd. Lower-back supporting device of chair
US10463153B2 (en) 2016-06-09 2019-11-05 Steelcase Inc. Seating arrangement
US10219627B2 (en) * 2016-09-29 2019-03-05 Steelcase Inc. Compliant seating structure
DE102017001503A1 (en) * 2017-02-16 2018-08-16 Oliver Deichmann A chair, in particular an office chair, with a mechanism acting between the seat surface and the backrest, by means of which the inclination resistance of the backrest is dependent on the load on the seat surface. The seat is at least partially raised depending on the load on the backrest.
USD852525S1 (en) 2017-05-25 2019-07-02 Steelcase Inc. Seating arrangement
USD851418S1 (en) 2017-05-25 2019-06-18 Steelcase Inc. Seating arrangement
USD827352S1 (en) 2017-05-25 2018-09-04 Steelcase Inc. Seating arrangement
USD851952S1 (en) 2017-05-25 2019-06-25 Steelcase Inc. Seating arrangement
USD852526S1 (en) 2017-05-25 2019-07-02 Steelcase Inc. Seating arrangement
USD851417S1 (en) 2017-05-25 2019-06-18 Steelcase Inc. Seating arrangement
USD846294S1 (en) 2017-05-25 2019-04-23 Steelcase Inc. Seating arrangement
USD852524S1 (en) 2017-05-25 2019-07-02 Steelcase Inc. Seating arrangement
USD869889S1 (en) 2017-12-05 2019-12-17 Steelcase Inc. Chairback
USD870479S1 (en) 2017-12-05 2019-12-24 Steelcase Inc. Chair
USD869872S1 (en) 2017-12-05 2019-12-17 Steelcase Inc. Chair
USD869890S1 (en) 2017-12-05 2019-12-17 Steelcase Inc. Chairback
US10426269B1 (en) * 2018-04-30 2019-10-01 Buzz Seating, Inc. Chair with appendage accommodations

Family Cites Families (75)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS471881Y1 (en) * 1968-07-29 1972-01-22
GB1584270A (en) * 1977-04-04 1981-02-11 Youngflex Sa Seats
US5249839A (en) * 1991-11-12 1993-10-05 Steelcase Inc. Split back chair
JP3156172B2 (en) * 1994-11-28 2001-04-16 株式会社光製作所 Chair made of metal pipe frame
US5871258A (en) * 1997-10-24 1999-02-16 Steelcase Inc. Chair with novel seat construction
EP0970639A1 (en) * 1998-07-07 2000-01-12 Provenda Marketing Ag Adjustable lumbar support
JP3874392B2 (en) * 1998-07-09 2007-01-31 株式会社岡村製作所 Chair
WO2000022959A1 (en) * 1998-10-20 2000-04-27 Protoned B.V. Chair mechanism
JP2000270962A (en) * 1999-03-24 2000-10-03 Okamura Corp Flexible base plate for chair
US6220661B1 (en) * 1999-04-19 2001-04-24 Steelcase Development Inc. Chair back and method of assembly
EP1191863A4 (en) * 1999-06-17 2004-06-09 Steelcase Inc Chair construction
US6254190B1 (en) * 1999-09-29 2001-07-03 Peter G. G. Gregory Chair having a seat with differential front and rear support portions
JP4316748B2 (en) * 1999-11-08 2009-08-19 株式会社岡村製作所 Chair
US6382719B1 (en) * 2000-05-04 2002-05-07 Steelcase Development Corporation Back construction
ITTV20000084A1 (en) * 2000-07-21 2002-01-21 Sitting Snc Di Bordin Giacinto A chair structure-particularly ergonomic chair for office, of the type equipped with head restraints and adjustable Lumbar cushions
JP2002119366A (en) * 2000-10-16 2002-04-23 Kokuyo Co Ltd Chair
IT1315528B1 (en) * 2000-10-18 2003-02-18 Enrico Cioncada Armchair tilting
GB0106247D0 (en) * 2001-03-14 2001-05-02 Williams David N L Improvements relating to supports
US6609755B2 (en) * 2001-06-15 2003-08-26 Hon Technology Inc. Ergonomic chair
US6568760B2 (en) * 2001-06-15 2003-05-27 Hon Technology Inc. Chair of modular construction
US6572190B2 (en) * 2001-06-15 2003-06-03 Hon Technology Inc. Lumbar support for a chair
US20020195855A1 (en) * 2001-06-20 2002-12-26 Teppo David S. Shape-changing support, such as for seating
US6565153B2 (en) * 2001-07-31 2003-05-20 Johnson Controls Technology Corporation Upper back support for a seat
JP3834502B2 (en) * 2001-11-05 2006-10-18 株式会社岡村製作所 Reclining chair
GB2414176B (en) * 2002-02-13 2006-09-13 Miller Herman Inc Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
US7097249B2 (en) * 2002-07-23 2006-08-29 Okamura Corporation Tilting mechanism for a chair and chair having the same
ITTO20020775A1 (en) * 2002-09-06 2004-03-07 Pro Cord Spa chair back.
US7048335B2 (en) * 2003-06-05 2006-05-23 Steelcase Development Corporation Seating unit with crossbar seat support
US20040140701A1 (en) * 2002-10-15 2004-07-22 Burkhard Schmitz Backrest for a seating structure with an adjustable sacral support
US20050062323A1 (en) * 2003-06-11 2005-03-24 Dicks Gerald G. Chair
US6709060B1 (en) * 2003-07-03 2004-03-23 Tung-Hua Su Chair backrest
US7458637B2 (en) * 2004-06-10 2008-12-02 Steelcase Inc. Back construction with flexible lumbar
US7237841B2 (en) * 2004-06-10 2007-07-03 Steelcase Development Corporation Back construction with flexible lumbar
CA2600308C (en) * 2005-03-01 2013-11-26 Haworth, Inc. Chair back
JP4856911B2 (en) * 2005-08-18 2012-01-18 株式会社イトーキ Chair with backrest
DE502005010192D1 (en) * 2005-10-03 2010-10-14 Vitra Patente Ag Chair
JP4719905B2 (en) * 2005-10-27 2011-07-06 コクヨ株式会社 Chair
JP5002835B2 (en) * 2005-10-27 2012-08-15 コクヨ株式会社 Member connection structure
JP4747311B2 (en) * 2005-11-11 2011-08-17 コクヨ株式会社 Chair
JP4721183B2 (en) * 2005-11-11 2011-07-13 コクヨ株式会社 Spring mounting structure
EP1952723A4 (en) * 2005-11-14 2013-04-03 Okamura Corp Headrest device of chair
US7226127B1 (en) * 2005-12-21 2007-06-05 Tk Canada Limited Ergonomic chair backrest
JP4015673B2 (en) * 2006-04-10 2007-11-28 株式会社岡村製作所 Chair backrest board
JP4996240B2 (en) * 2006-08-30 2012-08-08 株式会社イトーキ Chair
US7896438B2 (en) * 2006-09-29 2011-03-01 Sunrise Medical Hhg, Inc. Shapeable wheelchair seatback assembly
CN200953958Y (en) * 2006-09-30 2007-10-03 苏同华 Sitting-chair back
JP5132917B2 (en) * 2006-11-10 2013-01-30 株式会社岡村製作所 Chair backrest device
KR101090648B1 (en) * 2006-11-10 2011-12-07 가부시끼가이샤 오까무라세이사꾸쇼 Chair backrest device
US7874619B2 (en) * 2007-01-29 2011-01-25 Allseating Corporation Adjustable lumbar support for a chair back
BRPI0807127A2 (en) * 2007-01-29 2011-09-13 Miller Herman Inc seat structure and methods for using it
CN101801241B (en) * 2007-03-13 2013-06-05 Hni技术公司 Dynamic chair back lumbar support system
US7857388B2 (en) * 2007-06-01 2010-12-28 Steelcase Inc. Seating unit with adjustable lumbar device
JP5347142B2 (en) * 2008-01-16 2013-11-20 コクヨ株式会社 Chair
CN201175137Y (en) * 2008-03-07 2009-01-07 吴耀全 Improved chair back
US7775601B2 (en) * 2008-03-17 2010-08-17 Yao-Chuan Wu Back structure for a chair
WO2010044331A1 (en) * 2008-10-16 2010-04-22 株式会社岡村製作所 Chair
JP5460997B2 (en) * 2008-10-20 2014-04-02 タカノ株式会社 Hinge structure and chair back support structure using it
JP5434211B2 (en) * 2009-04-09 2014-03-05 トヨタ紡織株式会社 Assembly structure of sheet-like elastic body for vehicle seat
JP5467814B2 (en) * 2009-08-19 2014-04-09 株式会社イトーキ Chair back or seat
US20110215623A1 (en) * 2010-03-04 2011-09-08 Hsuan-Chin Tsai Height-Adjusting Assembly for Office Chair Backrest
US8449037B2 (en) * 2010-04-13 2013-05-28 Herman Miller, Inc. Seating structure with a contoured flexible backrest
US8408647B2 (en) * 2010-05-21 2013-04-02 Yao-Chuan Wu Movable chair backrest
US8272691B2 (en) * 2010-06-04 2012-09-25 Fuh Shyan Co., Ltd. Resilient lower-back supporting device capable of vertical adjustment along with backrest of chair
JP5527026B2 (en) * 2010-06-04 2014-06-18 トヨタ紡織株式会社 Vehicle seat
JP5671280B2 (en) * 2010-08-20 2015-02-18 株式会社イトーキ Chair shoulderrest or backrest or headrest
CN201958277U (en) * 2011-01-28 2011-09-07 陈育成 Multistage seatback frame
US20120193959A1 (en) * 2011-02-01 2012-08-02 Ching-Ming Chen Automatic waistrest adjusting device for office chairs
TWM414875U (en) * 2011-06-24 2011-11-01 Fuh Shyan Co Ltd Elastic leaning and restoration device of lifting back of office chair
US8613484B2 (en) * 2012-05-18 2013-12-24 Genius Champion Enterprises Co., Ltd. Detachable chair
US8528980B1 (en) * 2012-06-26 2013-09-10 Fu-Chih Hsiao Seat back unit
US8998339B2 (en) * 2012-09-20 2015-04-07 Steelcase Inc. Chair assembly with upholstery covering
WO2014144143A1 (en) * 2013-03-15 2014-09-18 Hni Technologies Inc. Chair with activated back flex
US9357849B2 (en) * 2013-10-10 2016-06-07 James E. Grove Dynamic lumbar support for a chair
US9192234B2 (en) * 2014-01-28 2015-11-24 James E. Grove Progressively curved lumbar support for the back of a chair
US9237811B1 (en) * 2014-11-03 2016-01-19 Patra Co., Ltd. Chair with improved waist bearing power

Also Published As

Publication number Publication date
JP2016073692A (en) 2016-05-12
WO2014196630A1 (en) 2014-12-11
WO2014196630A8 (en) 2015-05-28
US20160135603A1 (en) 2016-05-19
JP2017200599A (en) 2017-11-09
JP6353433B2 (en) 2018-07-04
JP6353443B2 (en) 2018-07-04
CN105263367A (en) 2016-01-20
JP2018187443A (en) 2018-11-29
JPWO2014196630A1 (en) 2017-02-23

Similar Documents

Publication Publication Date Title
US10172465B2 (en) Chair with activated back flex
US9648956B2 (en) Conforming back for a seating unit
US9326613B2 (en) Upholstered seat with flexible pelvic support
CA2769990C (en) A chair with tilting backrest
ES2290401T3 (en) Inclination chair synchronized with seat, backup and adjustable energy mechanism.
KR100779809B1 (en) Control mechanism for seating unit
CA2345603C (en) Chair with synchronously moving seat and seat back
DE10194640B4 (en) Chair that has a mechanism for supporting the seat part
US7334845B2 (en) Comfort surface for seating
US4660887A (en) Ergonomic support
JP3874392B2 (en) Chair
US7909402B2 (en) Back support for a seat
EP2347679B1 (en) Chair
CN101410037B (en) Ergonomic side chair
JP3142518B2 (en) Chair
EP2092855A1 (en) Backrest device for chair
KR20120079118A (en) Rocking chair
JP4856911B2 (en) Chair with backrest
JP3993375B2 (en) Chair
JP2007125221A (en) Backrest device of chair
JP4183084B2 (en) Chair and its back
US20160135603A1 (en) Chair
EP2359717B1 (en) Chair backrest
DE102008009509B4 (en) Office chair
JP2015177979A (en) chair

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170803

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20170803

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20171010

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20180518

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20180606

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20180806

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20190109

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20190304

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20190710

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20190809

R150 Certificate of patent or registration of utility model

Ref document number: 6572266

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150