EP3116347A1 - Rotatable item of seating furniture - Google Patents
Rotatable item of seating furnitureInfo
- Publication number
- EP3116347A1 EP3116347A1 EP15711075.0A EP15711075A EP3116347A1 EP 3116347 A1 EP3116347 A1 EP 3116347A1 EP 15711075 A EP15711075 A EP 15711075A EP 3116347 A1 EP3116347 A1 EP 3116347A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torsion spring
- bearing
- blocking
- base
- seat
- 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.)
- Granted
Links
- 230000000903 blocking effect Effects 0.000 claims abstract description 88
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 5
- 230000002040 relaxant effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract description 2
- 210000002414 leg Anatomy 0.000 description 16
- 230000008901 benefit Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/18—Chairs or stools with rotatable seat
- A47C3/185—Chairs or stools with rotatable seat self-returning to the original position
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/18—Chairs or stools with rotatable seat
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/14—Standing-up or sitting-down aids
Definitions
- the invention relates to a seat piece of furniture with a base and a seat unit, wherein between the base and the seat unit a rotary bearing comprising a base-side bearing means and a seating unit side bearing means is provided by means of which the seat unit is rotatable about a vertical axis relative to the base.
- the rotary bearing on a switchable blocking device, by means of which the rotational mobility of the storage facilities is mutually blocked.
- the invention also relates to a fitting for such a piece of seating furniture.
- Generic seating furniture pieces are known from the prior art. These are seat furniture pieces whose seat unit is basically rotatable relative to a base, wherein the base can be both a foot provided for stationary installation and a base portion provided with rollers. The latter is well known in particular office seating furniture.
- the rotational mobility of the seat unit allows the seated person to rotate the seat unit without twisting the base, thus assuming a seated position with a changed orientation.
- the pivot bearing which is provided for this purpose between the base and the seat unit, is provided in the case of generic seating furniture pieces with a blocking device that the base and the seat unit in a given relative rotational position coupled to each other so that a rotational movement is no longer possible or strong is difficult.
- the aforementioned blockability is particularly useful if it is a piece of seating furniture with a stand-up.
- a stand-up aid makes it possible to raise the seat unit in particular by an electric motor, so that getting up from the piece of seating furniture is facilitated.
- the blocking prevents when rising, that it comes to falls due to the rotational movement of the seat unit.
- the object of the invention is therefore to develop a generic piece of seating furniture or a fitting for such a piece of seating furniture to the effect that the switchable blocking device is inexpensive and reliable.
- the blocking device has a blocking surface, a torsion spring surrounding this blocking surface and a switching device.
- Said blocking surface is provided on a first of the two storage facilities.
- Said torsion spring wraps around this blocking surface and is fastened to a second bearing device and is such that it has a variable inner diameter as a function of the stress state.
- the switching device is coupled to the torsion spring in such a way that the torsion spring can either tension or relax.
- the torsion spring and the blocking surface are matched to one another such that the torsion spring rests against the blocking surface either in the clamped, compressed or relaxed contracted state, thereby preventing a rotational movement between the bearing devices.
- the inventive design of the blocking device thus provides that it has a circumferential blocking surface on which said torsion spring can create a clamping and from which the torsion spring, the blocking surface can be lifted releasing.
- the blocking surface is a preferably cylindrical surface which is aligned in the direction of the vertical axis.
- the torsion spring surrounds this blocking surface one or more times. It is of such a nature that, in a tightly strained or relaxed state, it bears in a clamped manner on the blocking surface and thus can not be moved relative to it, and in contrast other other more relaxed or stressed state exerts no or less force on the blocking surface and therefore permits the rotational movement.
- the switching device can basically be an electrically operated switching device, which expands or contracts the torsion spring.
- the switching device is a mechanical component that provides mechanical coupling with other subcomponents of the seating furniture piece and thus establishes the released and the blocked state of the blocking device in response to the movement of these other parts.
- the torsion spring used is such that its inner diameter depends on its state of tension. This is achieved in particular by a torsion spring with, in particular, helically arranged turns.
- the cross section through these turns can be circular.
- a square or otherwise rectangular shape may be advantageous, since such a shape causes a facilitated rotationally secured clamping and allows surface contact between the inside of the turns and the blocking surface.
- the end of the windings is preferably formed by two torque introduction sections whose relative position in the circumferential direction determines the state of stress.
- the ends of these turns can be directed radially or obliquely outwards, as is usual with leg springs.
- leg springs are advantageous in view of the low cost of the blocking device.
- the one or more torsion springs together loop around the blocking surface over an angle of at least about 360 ° ( ⁇ 15%).
- the blocking surface is thus clamped at least almost circumferentially by the torsion spring or the torsion springs.
- Particularly advantageous embodiments are considered in which the torsion spring or the plurality of torsion springs wrap around the blocking surface over an angle of approximately 1080 ° ( ⁇ 15%) or 1800 ° ( ⁇ 15%). It is therefore Bacumschlingungswinkel that provide that the blocking surface is looped about three times or about five times.
- the tension in the torsion spring provided for producing or releasing the blocking state also leads to a torque acting in the circumferential direction, which is not desired. It is therefore of advantage if an even number of torsion springs, in particular two torsion springs, are used, which are tensioned or relaxed relative to the circumferential direction during simultaneous tensioning or simultaneous expansion in opposite directions, so that their torque acting in the circumferential direction is compensated in each case becomes.
- these two torsion springs wrap around the blocking surface over an angle of approximately 540 ° ( ⁇ 15 °) or approximately 900 ° ( ⁇ 15 °), ie approximately one and a half times or two and a half times ,
- the switching device preferably has a switching slide, which is axially movable along the first or second bearing device guided by a guide.
- This shift carriage is operatively coupled to the torsion spring or the torsion springs such that the axial displacement of the shift carriage causes a tensioning or relaxing of the torsion spring and thus blocking or releasing the blocking device.
- the storage of the shift carriage on the first or second bearing device can be formed in the simplest case by a slot with arranged therein slider, in particular in the form of screws.
- the displacement of the shift carriage can in particular be effected indirectly by a displacement of other subcomponents of the piece of seating furniture. In principle, however, a direct electrical drive of the shift carriage is possible.
- the interaction between the shift carriage on the one hand and the at least one torsion spring on the other hand preferably takes place in that at least one shift bevel is arranged directly on the shift carriage, by means of the axial displacement of which a torque introduction section of the torsion spring derived therefrom is displaced in the circumferential direction.
- the shift carriage can also have two Heidelbergschrägen.
- a shift carriage with two shift bevels is advantageous if more than one torsion spring is used, so that each torque introduction section can be deflected jointly by a plurality of torsion springs through the shift carriage. If the shift carriage has a plurality of shift bevels, these are preferably offset from one another in the axial direction, so that there is no need to position the torque introduction sections of the plurality of torsion springs at the same height.
- Momenteneinlei- tion sections of the shift carriage can also act on a relative to the shift carriage movable intermediate member, which may be provided, for example, pivotally mounted on the second bearing means.
- This intermediate member in turn acts on one or more torque introduction portions of the torsion spring or torsion springs, so that they are deflected in response to the displacement of the intermediate member in the circumferential direction.
- the torque introduction section movable relative to the second bearing device is movably guided. This can be achieved for example by a slot through which leads the torque introduction section.
- a guide is not absolutely necessary, since already the wrap-around shape of the spring usually ensures sufficient axial positional stability of the torque introduction sections.
- a return spring is provided by means of which the shift carriage is permanently acted upon in the direction of its end position. It is particularly advantageous if this return spring is not formed as a separate spring element, but is formed by the one or more torsion springs.
- this return spring is not formed as a separate spring element, but is formed by the one or more torsion springs.
- this serves the purpose in a described manner to convert the axial movement of the shift carriage in a circumferential direction of one or more torque introduction sections.
- the torque introduction sections can also exert the restoring force on the shift carriage, in that the torque introduction sections acting in the circumferential direction exert an axial force on the shift carriage due to the diversion of the shift bevel.
- a further design of the switching device provides a shift lever which can be pivoted on the first or the second bearing unit.
- Direction is attached and which is operatively coupled to the torsion spring such that a pivoting movement of the shift lever causes a tensioning or relaxing the torsion spring and thus blocking or releasing the blocking device, wherein preferably the shift lever is connected to a torque introduction portion of the torsion spring, so that these by a Pivoting movement of the shift lever is displaceable in the circumferential direction.
- a shift lever is preferably provided per torsion spring.
- the torsion spring or torsion springs are preferably provided on the seat-side bearing device and in each case pivotable about a horizontal pivot axis.
- an arm of the at least one shift lever is connected to a torque introduction portion of a torsion spring, so that it is moved in the circumferential direction when the shift lever pivots. The pivoting movement of the shift lever thus leads to the desired blocking or release.
- the switching of the blocking device can be realized in various ways.
- a particularly advantageous design provides that it is a piece of seating furniture with a stand-up function, through which the seat can be raised to facilitate getting up from the sitting position.
- the blocking device can be operatively coupled with the stand-up assistance function in such a way that it assumes its blocked state upon actuation of the stand-up assistance function.
- the stand-up can be designed by a motor in a conventional manner. In principle, however, a mechanical, for example spring-operated stand-up assistance function is also conceivable.
- the coupling of the stand-up assistance function with the blocking device is particularly useful because a rotation of the seat counteracts the easier getting up.
- the production of the blocked state upon activation of the stand-up is therefore expedient.
- a control lever is provided for manual actuation, which is preferably also of such a type that he the axially displaceable shift carriage or the pivoting Weghe- can move on.
- a control lever may be provided in the manner well known by office seating pieces below the seat and allow either permanent blocking and releasing or allow from a normally blocked state by relocation of the operating lever, a temporary release.
- the distribution of the first and second bearing device on the base or the seat is basically arbitrary.
- the blocking surface can therefore be either rotationally fixed to the seat or the base, while the torsion spring is stationary to the other storage device.
- the blocking surface and the first bearing device are provided on the side and the torsion spring and the second bearing device are provided on the seat side. This makes it possible to switch seat-side actuators such as the aforementioned operating lever or the stand-up assistance function in a facilitated manner with the torsion spring switching.
- the invention relates not only to the piece of seating furniture as a whole but also a fitting for such a piece of seating furniture.
- FIG. 2 shows the pivot bearing of the piece of seating furniture according to FIG. 1 together with the blocking device
- Fig. 6a to 6b an alternative form of blocking device.
- FIGS 1 a to 1 c show an inventive piece of seating furniture in the manner of an armchair.
- This seat piece of furniture has a seat unit 10, in the present case also comprising a backrest 14 and a leg rest 16, in addition to a seat surface 12 which is not upholstered.
- the seat unit 10 as a whole is rotatable relative to a base 20 about a vertical axis 2.
- the base 20 is intended for stationary installation of the piece of seating furniture, but could also be equipped in the manner of office chairs with rollers in order to be easily displaced as a whole.
- the rotatability of the seat unit is achieved via a rotary bearing 30, which is arranged directly above the base 20.
- Fig. 2 shows this pivot bearing in a cut manner.
- it comprises an inner axle section 32, which is rotationally fixed to the seat unit 12, and a bearing sleeve 34 accommodating the axle section 32, which is an integral part of the base 20.
- the main components of the blocking means provided therefor are primarily a blocking surface 40 formed by the outer surface of the bearing sleeve 34 and two torsion springs 50a, 50b each formed in the manner of leg springs.
- Both leg springs 50a, 50b are each mounted with a leg 51a, 51b relative to a circumferential direction about the axis of rotation 2, stationary on the seat unit 12, while the respective opposite legs 52a, 52b are generally movable with respect to the circumferential direction.
- a circumferentially directed movement of the legs 52a, 52b leads to a tensioning or relaxing of the torsion springs 50a, 50b.
- the torsion springs 50a, 50b surrounded with their respective 1, 5 turns (corresponds to about 540 °) the blocking surface 40.
- the torsion springs 50a, 50b are tuned to the diameter of the blocking surface 40, that when eliminating an external moment acting on the legs, the springs assume a relaxed state in which they are pressed against the blocking surface 40. This represents the blocked state. So if not on the thighs 52a, 52b spreading moment present, the torsion springs 50a, 50b block a rotational movement of the seat unit 10 relative to the base 20th
- a switching slide 60 is available, which is displaceable in the axial direction illustrated by the arrow 4.
- the switching carriage 60 is for this purpose equipped with a slot 62 through which project two screws 63, which are screwed into the seat-side bearing device.
- the shift carriage 60 has two offset in the axial direction and oppositely inclined shift bevels 64a, 64b, against which the spring legs 52a, 52b.
- the switching bevels have an angle to the vertical of about 45 ° in the present case.
- the angling of the shift bevels 64a, 64b is such that no self-locking occurs in both directions of action: it is desired that both a displacement of the shift carriage 60 be a spreading of the spring legs 52a, 52b, as well as that the legs 52a, 52b can initiate an axially acting force in the switching carriage 60 in order to be able to divide it back.
- FIGS. 3a and 3b show the released state of the blocking device. This is given when the switching carriage 60 is in a lower end position, in which the legs 52a, 52b respectively in the region of the upper ends of the shift bevels 64a, 64b are arranged. They are thereby spread apart. The turns of the springs 50a, 50b are no longer clamped against the blocking surface 40.
- the lower end position of the shift carriage 60 is effected by a cross-beam 18 of the seat unit 10, which acts from above on the shift carriage 60 and this can not escape in the released position of Figures 3a and 3b upwards.
- FIGS. 5a and 5b illustrate how the blocked state of FIGS. 4a to 4c is caused.
- the figures show the piece of seating furniture when the standing-up aid is activated.
- This get-up aid Fe causes a plurality of components of the seat unit 10 to pivot as shown.
- These components also include said cross-member 18, which is raised from its dashed line in Figure 5a indicated starting position 18 'and thereby loses contact with the switching slide 60. As a result, this deviates upwards in the manner already described and establishes the blocked state of the blocking device.
- Activating the stand-up assistance function thus also automatically causes a blocking of the blocking device without a separate switching process.
- FIGS. 6a and 6b show an alternative form of blocking device.
- two shift levers 65a, 65b are provided, which are mounted pivotably about the axes 67a, 67b in relation to the seat unit side bearing device 32.
- the spring legs 52a, 52b of the torsion springs 50a, 50b acting as torque introduction sections are fixed.
- the respective upper end of the shift lever is provided with a Einkopplungsabêt 66 a, 66 b, by the application of force, the shift lever 65 a, 65 b can be pivoted.
- the actuation of the shift lever 65a, 65b is similar to the described switching slide 66 via the cross-beam 18.
- the blocking device is released.
- the torsion springs 50a, 50b can again assume their relaxed state when the control levers 65a, 65b pivot at the same time, in which they abut against the blocking surface 40 and thus bring the blocking device into the blocked state.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Springs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014204401.4A DE102014204401B4 (en) | 2014-03-11 | 2014-03-11 | Swivel seating furniture |
PCT/EP2015/054860 WO2015135882A1 (en) | 2014-03-11 | 2015-03-09 | Rotatable item of seating furniture |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3116347A1 true EP3116347A1 (en) | 2017-01-18 |
EP3116347B1 EP3116347B1 (en) | 2018-02-14 |
Family
ID=52697371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15711075.0A Not-in-force EP3116347B1 (en) | 2014-03-11 | 2015-03-09 | Rotatable item of seating furniture |
Country Status (5)
Country | Link |
---|---|
US (1) | US9578967B2 (en) |
EP (1) | EP3116347B1 (en) |
CN (1) | CN106572752B (en) |
DE (1) | DE102014204401B4 (en) |
WO (1) | WO2015135882A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014211962B4 (en) | 2014-06-23 | 2016-01-07 | Kintec-Solution Gmbh | Swivel seating furniture |
DE102015112618A1 (en) * | 2015-07-31 | 2017-02-02 | Störiko product design GmbH | chair |
DE102017122387A1 (en) * | 2017-09-27 | 2019-03-28 | Airbus Operations Gmbh | Passenger seating system for a means of transport |
DE102017122397A1 (en) * | 2017-09-27 | 2019-03-28 | Airbus Operations Gmbh | Passenger seating system for a means of transport |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1578784A (en) * | 1923-05-29 | 1926-03-30 | Joseph S Walton | Swivel connection |
US1895226A (en) * | 1931-05-11 | 1933-01-24 | Chicago Hardware Foundry Compa | Stool seat positioning means |
US2755842A (en) * | 1951-12-08 | 1956-07-24 | Peter G Caramelli | Center-controlled movable seat construction |
US3223376A (en) * | 1963-11-18 | 1965-12-14 | Stewart Warner Corp | Self-returning chair control |
US3837611A (en) * | 1973-10-01 | 1974-09-24 | Keystone Consolidated Ind Inc | Swivel construction for a chair |
DE2530944A1 (en) * | 1975-07-11 | 1977-01-27 | Neumueller | Movement control for office swing chair - has cam to move shoulder into movement limiting notches in base |
DE8017198U1 (en) * | 1980-06-27 | 1981-02-12 | Friedrich-W. Dauphin, Buerositzmoebelfabrik, 8561 Offenhausen | SEAT, IN PARTICULAR OFFICE AND / OR INDUSTRIAL CHAIR |
FI83590C (en) * | 1989-05-10 | 1991-08-12 | F Ma Mekrapid | Hub construction for a rotatable chair |
DE19528645C1 (en) * | 1995-08-04 | 1997-02-13 | Stabilus Gmbh | Slide column |
KR20010006876A (en) * | 1999-06-30 | 2001-01-26 | 이세용 | Auto-returning Height-control Assembly for a Chair |
CN2772333Y (en) * | 2005-02-06 | 2006-04-19 | 上海延锋江森座椅有限公司 | Back regulating mechanism of chair |
GB2430009A (en) * | 2005-09-10 | 2007-03-14 | Sunpex Technology Co Ltd | Seat securing mechanism comprising tapered control rod |
BRPI0719191A2 (en) * | 2006-10-12 | 2014-02-04 | Johnson Controls Tech Co | RECLINABLE CHAIR MECHANISM |
CN201267312Y (en) * | 2008-06-20 | 2009-07-08 | 余国鸿 | Revolving chair chassis back locking and controlling mechanism |
CN201518937U (en) * | 2009-10-29 | 2010-07-07 | 杭州杨氏实业有限公司 | Two-way torsion spring type multifunctional swivel chair tray |
DE102012219113A1 (en) * | 2011-11-09 | 2013-05-16 | Dewertokin Gmbh | Electromotive linear drive, in particular for adjusting reclining and seating furniture |
US20140292053A1 (en) * | 2013-04-02 | 2014-10-02 | Catapult Global, LLC | Dual thrust bearing chair swivel |
JP2015028360A (en) * | 2013-07-30 | 2015-02-12 | 日立オートモティブシステムズ株式会社 | Support device and turn position return device |
-
2014
- 2014-03-11 DE DE102014204401.4A patent/DE102014204401B4/en not_active Expired - Fee Related
-
2015
- 2015-03-09 EP EP15711075.0A patent/EP3116347B1/en not_active Not-in-force
- 2015-03-09 WO PCT/EP2015/054860 patent/WO2015135882A1/en active Application Filing
- 2015-03-09 CN CN201580024456.4A patent/CN106572752B/en not_active Expired - Fee Related
- 2015-03-10 US US14/643,079 patent/US9578967B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2015135882A1 (en) | 2015-09-17 |
US9578967B2 (en) | 2017-02-28 |
CN106572752B (en) | 2019-08-06 |
CN106572752A (en) | 2017-04-19 |
EP3116347B1 (en) | 2018-02-14 |
US20150257537A1 (en) | 2015-09-17 |
DE102014204401A1 (en) | 2015-09-17 |
DE102014204401B4 (en) | 2016-02-11 |
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