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EP3326492A1 - D'inclinaison d'appuie-tête réversible, mécanisme lombaire - Google Patents

D'inclinaison d'appuie-tête réversible, mécanisme lombaire Download PDF

Info

Publication number
EP3326492A1
EP3326492A1 EP17187070.2A EP17187070A EP3326492A1 EP 3326492 A1 EP3326492 A1 EP 3326492A1 EP 17187070 A EP17187070 A EP 17187070A EP 3326492 A1 EP3326492 A1 EP 3326492A1
Authority
EP
European Patent Office
Prior art keywords
bracket
brackets
coupled
shaft
actuator
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.)
Withdrawn
Application number
EP17187070.2A
Other languages
German (de)
English (en)
Inventor
Allen R. Sigmon
Robert Dean Donovan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
L&P Property Management Co
Original Assignee
L&P Property Management Co
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
Priority claimed from US15/251,242 external-priority patent/US9949567B2/en
Application filed by L&P Property Management Co filed Critical L&P Property Management Co
Publication of EP3326492A1 publication Critical patent/EP3326492A1/fr
Withdrawn legal-status Critical Current

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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—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/46—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/036—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a head-rest
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/38—Supports for the head or the back for the head, e.g. detachable
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/46—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs

Definitions

  • Embodiments of the present invention relate to headrest mechanisms, and particularly to headrest mechanisms for use on reclining seating units.
  • Conventional recliner chairs typically incorporate mechanisms to move the chair into three basic positions: closed, with the footrest retracted and the back generally upright, a "TV position” with the footrest extended and the back generally upright, and reclined, with the footrest extended and the back in a reclined position.
  • the moveable headrest feature allows the head portion of the chair back to pivot with respect to the remainder of the back. This may increase the comfort of a person, especially in the reclined position, as rotation of the headrest provides supports the head of the user and can be adjusted to the most-comfortable position.
  • While moveable headrests have been provided, it is desirable to provide a simplified structure, capable of installation on any number of styles of chairs, while still providing the adjustment needed to enhance the comfort of those using the chair.
  • Another comfort-aiding feature is a lumbar support. It would be desirable to provide adjustable lumbar support to a chair as well.
  • an adjustable lumbar support mechanism for installation on a chair having a back frame as defined in independent claim 1 and a reversible mechanism for installation on a chair having a back frame as defined in independent claim 6 are provided.
  • the dependent claims define preferred and/or advantageous embodiments of the invention.
  • a simplified headrest tilt mechanism is disclosed that is operable to move a headrest portion of a chair back between a closed position generally in line with a chair back, and an open position in which the headrest is pivoted with respect to the chair back.
  • a simplified adjustable lumbar support mechanism is provided that is operable to move a lumbar push bar between a retracted position in line with the chair back, and an extended position in which the lumbar push bar is pivoted with respect to the chair back to provide added lumbar support.
  • a side bracket is coupled to each side of the back frame, and a back bracket is pivotably coupled to each side bracket.
  • An actuator is pivotably coupled to the back frame that has an extendable and retractable shaft.
  • a headrest back insert is couple-able to and between the back brackets, such that extension and retraction of the actuator shaft rotates the headrest back insert.
  • a lumbar push bar is couple-able to and between the back brackets, such that extension and retraction of the actuator shaft rotates the lumbar push bar.
  • Embodiments of the present invention generally relate to a moveable headrest or head tilt mechanism for use on a recliner chair or other item of furniture.
  • an exemplary headrest tilt mechanism 10 is shown that moves the head portion of the chair between the closed position, shown in FIGS. 1 and 2 , to the open position, shown in FIG. 3 .
  • the mechanism 10 is installed into the chair by mounting it to a back frame post 12 that forms the frame for the back of the chair. Only one back frame post 12 is shown in the figures for clarity, but in practice, a second back frame post will be present to support the other side of the chair back.
  • back frame post 12 forms only a part of the entire chair frame.
  • Mechanism 10 is mounted to back frame post through a back post spacer block 14.
  • Block 14 is rigidly secured to the inner face of the back frame post 12.
  • a back bracket 16 is then rigidly secured to the back post spacer block 14, such as by screws or bolts, although other methods of attachment would work.
  • Back bracket 16 extends forwardly and upwardly.
  • a stop 18 is either formed in, or coupled to, back bracket 16 at the lower end of the back bracket 16.
  • a headrest tilt 20 is pivotally coupled to the upper end of back bracket 16 at pivot 22 (as shown in FIG. 3 ).
  • Headrest tilt 20 is shaped as shown with an upwardly extending leg 24 and an inwardly extending leg 26. As shown, there are two headrest tilts 20, one a mirror-image of the other.
  • a top connector tube 28 is coupled to each inwardly extending leg 26 to secure the two headrest tilts 20 together.
  • the connector tube 28 may include a series of spaced holes along its length to allow for width changes in the chair back to which mechanism 10 is attached.
  • a back insert 30 is coupled between the upwardly extending legs 24 of the headrest tilts 20.
  • the back insert 30 is a rigid frame that, in practice, will be finished with support, padding and a cover.
  • a bottom bracket 32 is coupled to the back frame post 12, spaced downwardly from back bracket 16.
  • the mechanism 10 includes two bottom brackets 32, each a mirror-image of the other.
  • a bottom connector tube 34 is rigidly secured to each bottom bracket 32 and forms a lower brace for the mechanism 10.
  • a clevis 36 is coupled to the connector tube 34 such as by bolts, rivets or welding.
  • the shaft 38 of a motor 40 is then pivotally coupled to the clevis 36.
  • the motor shown in the figures could also be any other type of motor, linear actuator or gas spring, capable of the movements described below.
  • the upper end of motor 40 is pivotally coupled to back area of a motor slide hinge 42 at pivot 44.
  • Motor slide hinge 42 has an upper surface with a locating notch 46, as best seen in FIG.
  • motor slide hinge 42 includes a retaining finger 48 that extends upwardly.
  • the retaining finger 48 operates to prevent the mechanism geometry from entering an over-center condition, retaining the stop pin 54 in the desired area.
  • the forward area of motor slide hinge 42 is pivotally coupled to a motor slide bracket 50 at pivot 52.
  • Motor slide bracket 50 is generally L-shaped. One leg of the L is pivotally coupled to the motor slide hinge 42. The other leg of the L is rigidly secured to the adjacent inward leg 26 of the headrest tilt 20 through connector tube 28.
  • a stop pin 54 is rigidly secured to the motor slide bracket 50. Stop pin 54 is located to correspond with the notch 46 in the motor slide hinge 42.
  • At least one of the inward legs 26 is connected to at least one of the bottom brackets 32 (or the bottom connector tube 34, or the back post 12) with an extension spring 56.
  • Spring 56 biases the mechanism 10 to the closed position shown in FIG. 1 .
  • the motor 40 is sized to overcome this spring force to move the mechanism 10 from the closed position to the open position. More specifically, if a user desires to move the mechanism from the closed position of FIG. 1 to the open position of FIG. 3 , he or she will engage the motor 40. While not shown, the motor 40 is operably connected to a switch or control that is operable by the user. The control for the motor 40 may be separate from, or integrated with, other controls associated with the chair.
  • the shaft 38 of the motor extends, overcoming the biasing force of spring 56 and causing an upward force at pivot 44.
  • This upward force moves the motor slide hinge 42 upwardly.
  • the stop pin 54 is rotated rearwardly and upwardly, caused by the upward force of motor slide hinge 42 and the pivot point 52.
  • This movement also results in the corresponding movement of the motor slide bracket 50.
  • the rotation of the motor slide bracket 50 operates to rotate the headrest tilt 20 about pivot 22. So, the motor 40 is used to provide selected adjustment of the angular position of the headrest tilt 20 with respect to the back frame post 12.
  • the motor controls are used to retract the shaft 38, and the spring 56 operates to pull the headrest tilts 20 to the closed position, until the headrest tilt 20 abuts stop 18.
  • Another feature of the mechanism 10 is the release configuration. As the headrest tilts 20 are moving to the closed position, objects may have moved into place behind the back insert 30. If an object is present, the pivotal coupling of the motor 40, motor slide hinge 42 and motor slide bracket 50 cooperate to allow the motor 40 to continue to operate, without imparting continued force to the rotation of the headrest tilts 20. More specifically, if an object is behind the back insert 30, it will operate to block movement of the headrest tilts 20, effectively preventing rotation about pivot 22. The motor 40 can continue to operate, moving pivot 44 downwardly. With the headrest tilts 20 prevented from movement, the motor slide bracket 50 will remain in place. The motor slide hinge 42 is still allowed to move, pivoting about pivot 52. This effectively moves the motor slide hinge 42 away from the stop pin 54, as seen in FIG. 4 . The only remaining force acting against the object behind back insert 30 is imparted by the spring 56.
  • the mechanism 10 has been described above in a "frame-within-a-frame" environment.
  • the back insert 30 nests within or between the back frame posts 12.
  • the mechanism 10 could also be used in an environment where the back frame posts 12 extend only to approximately the area of pivot 22, with the back insert configured to extend essentially across the width of the chair on which it is placed.
  • FIGS. 6 and 7 An embodiment of the mechanism 10 showing the use of a different motor 40A is shown in FIGS. 6 and 7 .
  • the clevis 36A is configured differently from clevis 36 to accommodate the motor 40A.
  • the remainder of the components of mechanism 10 is the same.
  • other motors, gas springs, or linear actuators could also be used in mechanism 10.
  • each different motor, gas spring or actuator may require slight modification in the mounting arrangement.
  • FIGS. 8-11 A different embodiment of the mechanism 10 showing a slightly different configuration is shown in FIGS. 8-11 .
  • the mechanism 10 is again mounted between a back frame post 12 and a back insert 78.
  • a motor bracket 60 is coupled to the frame post 12, such as by bolts, adhesives or screws, although other attachment mechanisms could certainly be used.
  • Bracket 60 extends inwardly from the frame post 12 and has an upwardly extending tab that is coupled to a clevis 62 of a motor 64 at pivot 66.
  • the opposite end of motor 64 has an extending shaft 68 that is pivotally coupled to a motor slide hinge 70 at pivot 72.
  • Motor slide hinge 70 is shaped as shown and has a retaining notch 82, as best seen in FIG.
  • the motor slide hinge 70 is pivotally coupled to a back bracket 74 at pivot 76.
  • the pivotal coupling can be made with a bolt, rivet or other pivotal attachment mechanism.
  • a cam 80 is fixed to the back bracket 74.
  • the cam 80 generally rests within the retaining notch 82.
  • the upper end of the back bracket 74 is fixedly coupled to the back insert 78, such that movement of the back bracket 74 results in movement of the back insert 78.
  • the back bracket 74 is pivotally coupled to a side bracket 86 at pivot 88.
  • side bracket 86 has an unused hole spaced from pivot 88. Having two holes positioned in this location and geometry allows side brackets 86 to be used as either left-side or right-side interchangeably.
  • a locating stop 92 is coupled to back bracket 74 and protrudes outwardly toward side bracket 86. In the closed position, stop 92 rests within a notch 94 in side bracket 86.
  • a side bracket 86 and a back bracket 74 are used to pivotally couple back frame post 12 to back insert 78 on the side opposite motor 64.
  • a spring 96 extends from back bracket 74 to a mounting tab 98 coupled to back frame post 12.
  • FIGS. 12-14 show a mechanism 10 that is similar to that described above with respect to FIGS. 8-11 , but showing a "split-back" configuration.
  • the mechanism 10 of FIGS. 12-14 has many of the same components as those described in FIGS. 8-11 .
  • the back frame is split into a lower back frame post 100 and an upper head rest frame 102.
  • the motor bracket 60 is coupled to the lower back frame post 100.
  • the back bracket 74 is coupled to the upper head rest frame 102 via a spacer block 104.
  • This embodiment illustrates the use of mechanism 10 in a split-back configuration, as opposed to the frame within a frame configuration of FIGS. 8-11 .
  • the principle operation of the mechanism remains the same, but offers furniture manufacturers additional choices in styling.
  • FIG. 15 illustrates the basics of mechanism 10 as shown and described with reference to FIGS. 8-14 , but showing the use of a different motor 110 (which is the same motor as shown and described with respect to FIGS. 6 and 7 above).
  • FIG. 15 illustrates that a number of different motors can be used while retaining the majority of the mechanism.
  • a different motor bracket 112 is used to mount motor 110 to the back frame post 12.
  • the coupling between the motor 110 and motor slide hinge 70 may be slightly different, depending on the shaft configuration of the motor.
  • FIGS. 16-19 illustrate the use of mechanism 10 shown in a reversed configuration (as compared to FIGS. 8-11 ) to provide a motorized, adjustable lumbar support, rather than the headrest tilt.
  • the mechanism 10 by being reversible, allows a manufacturer to stock only one mechanism 10 that provides either an adjustable headrest tilt, or an adjustable lumbar support, requiring only minimal changes in assembly.
  • the mechanism 10 is again mounted to a back frame post 12. Instead of the opposite end being mounted to a back insert (such as back insert 78 in FIGS. 8-11 ), the mechanism is mounted to a lumbar push bar 200.
  • the mechanism 10 is inverted from the orientation shown in FIG. 8 , to provide an adjustable lumbar support, as opposed to a headrest tilt.
  • motor bracket 60 is coupled to the frame post 12, such as by bolts, adhesives or screws, although other attachment mechanisms could certainly be used. Bracket 60 extends inwardly from the frame post 12 and has a downwardly extending tab that is coupled to clevis 62 of motor 64 at pivot 66. The opposite end of motor 64 has an extending shaft 68 that is pivotally coupled to a motor slide hinge 70 at pivot 72. Motor slide hinge 70 is shaped as shown and has a retaining notch 82, as best seen in FIG. 16A , and a retaining finger 84. The motor slide hinge 70 is pivotally coupled to a back bracket 74 at pivot 76. Although not shown, the pivotal coupling can be made with a bolt, rivet or other pivotal attachment mechanism.
  • a cam 80 is fixed to the back bracket 74.
  • the cam 80 generally rests within the retaining notch 82.
  • the lower end of the back bracket 74 is fixedly coupled to the lumbar push bar 200, such that movement of the back bracket 74 results in movement of the lumbar push bar 200.
  • the back bracket 74 is pivotally coupled to a side bracket 86 at pivot 88. Note that side bracket 86 has an unused hole spaced from pivot 88. Having two holes positioned in this location and geometry allows side brackets 86 to be used as either left-side or right-side interchangeably.
  • a locating stop 92 is coupled to back bracket 74 and protrudes outwardly toward side bracket 86. In the closed position, stop 92 rests within a notch 94 in side bracket 86. As best seen in FIG. 18 , a side bracket 86 and a back bracket 74 are used to pivotally couple back frame post 12 to the lumbar push bar 200 on the side opposite motor 64. A spring 96 extends from back bracket 74 to a mounting tab 98 coupled to back frame post 12.
  • the operation of the mechanism 10 shown in FIGS. 16-19 operates substantially similarly to the operation described with respect to FIGS. 1-5 above, including the operation of the motor and spring return, use of the retaining finger, and the release operation, except the mechanism 10 is inverted, such that the lumbar push bar 200 is extended and retracted (as opposed to the back insert). More specifically, the motor 64 is sized to overcome the force of spring 96 to move the mechanism 10 from the closed position to the extended position. If a user desires to move the mechanism from the closed position of FIG. 16 to the open position of FIG. 18 , he or she will engage the motor 64. While not shown, the motor 64 is operably connected to a switch or control that is operable by the user.
  • the control for the motor 64 may be separate from, or integrated with, other controls associated with the chair.
  • the shaft 68 of the motor extends, overcoming the biasing force of spring 96 and causing a downward force at pivot 72. This downward force moves the slide hinge 70 against the cam 80, to rotate back bracket 74.
  • the rotation of the back bracket 74 operates to rotate or extend the lumbar push bar 200.
  • the motor 64 is used to provide selected adjustment of the angular position of the lumbar push bar 200 with respect to the back frame post 12.
  • the motor controls are used to retract the shaft 68, and the spring 96 operates to pull the lumbar push bar 200 to the closed position.
  • the motor shaft 68 may be directly coupled to the back bracket 74. In this configuration, the motor 64 positively extends, and retracts, the lumbar push bar 200. If the motor shaft 68 is directly coupled to the back bracket 74 in this way, the spring 96 and mounting tab 98 may be eliminated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP17187070.2A 2016-08-30 2017-08-21 D'inclinaison d'appuie-tête réversible, mécanisme lombaire Withdrawn EP3326492A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15/251,242 US9949567B2 (en) 2014-09-26 2016-08-30 Reversible headrest tilt, lumbar mechanism

Publications (1)

Publication Number Publication Date
EP3326492A1 true EP3326492A1 (fr) 2018-05-30

Family

ID=59677138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17187070.2A Withdrawn EP3326492A1 (fr) 2016-08-30 2017-08-21 D'inclinaison d'appuie-tête réversible, mécanisme lombaire

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EP (1) EP3326492A1 (fr)
CN (1) CN107788737B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019234719A1 (fr) * 2018-06-09 2019-12-12 Elio Maurizio Ravaioli Mécanisme de mouvement amélioré pour le mouvement de parties mobiles d'un canapé ou d'un fauteuil inclinable rembourré
CN112716190A (zh) * 2019-10-14 2021-04-30 黄子源 一种舒适椅及其舒适椅支架

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108433415B (zh) * 2018-04-28 2024-08-02 锐迈科技股份有限公司 一种单驱动件实现多个姿态调节的机械装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04102409A (ja) * 1990-08-22 1992-04-03 Koito Ind Ltd 座席装置
US20050035637A1 (en) * 2001-03-01 2005-02-17 Mcmillen Robert James Universal ergonomic support with self-contained actuator
EP2039270A1 (fr) * 2007-09-21 2009-03-25 Ciar S.P.A. Support lombaire

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836198A (en) * 1973-01-22 1974-09-17 Hoover Seng Co Manually movable headrest for chairs
US9458905B2 (en) * 2012-09-20 2016-10-04 Steelcase Inc. Spring assembly and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04102409A (ja) * 1990-08-22 1992-04-03 Koito Ind Ltd 座席装置
US20050035637A1 (en) * 2001-03-01 2005-02-17 Mcmillen Robert James Universal ergonomic support with self-contained actuator
EP2039270A1 (fr) * 2007-09-21 2009-03-25 Ciar S.P.A. Support lombaire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019234719A1 (fr) * 2018-06-09 2019-12-12 Elio Maurizio Ravaioli Mécanisme de mouvement amélioré pour le mouvement de parties mobiles d'un canapé ou d'un fauteuil inclinable rembourré
CN113015464A (zh) * 2018-06-09 2021-06-22 埃利奥·拉瓦约利 用于移动斜倚沙发或躺椅的可移动部件的改进的运动机构
CN112716190A (zh) * 2019-10-14 2021-04-30 黄子源 一种舒适椅及其舒适椅支架

Also Published As

Publication number Publication date
CN107788737A (zh) 2018-03-13
CN107788737B (zh) 2021-11-19

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