Seat arrangement

Abstract

A seating arrangement is disclosed that includes a back frame, a back shell, and a cover member, the back frame including a top portion, a bottom portion, and a pair of side portions that cooperate to define an opening, wherein at least one of the top portion, the bottom portion, and the side portions includes a longitudinally extending channel; the back shell having a forward facing support surface positioned within the opening and configured to support a seated user, and an attachment portion extending around at least a portion of a perimeter of the support surface; the cover member extending over the support surface, wherein the cover member is directly attached to the attachment portion of the back shell at an attachment location, and wherein the attachment location and the attachment portion of the back shell are positioned within the channel and are hidden from view.

Description

[0001] This application is a divisional application of Chinese patent application No. 201780035801.3, filed on June 6, 2017, entitled "Seat Device". Technical Field

[0002] Various embodiments relate to a seating device that includes different combinations of a linearly adjustable seat assembly, a tiltable back assembly, a flexible back support assembly, a control device, and a vertically adjustable arm assembly. Summary of the Invention

[0003] In one embodiment, a seating device includes: a seat assembly configured to support a seated user thereon; a backrest assembly movable between an upright position and a reclining position, wherein the backrest assembly is configured to support the user and extends upward from the seat assembly; and a control assembly. The control assembly includes: a pair of spring members, each having a first end and a second end, the first end operably coupled to the backrest assembly, wherein the spring members are configured to bias the backrest assembly from the reclining position toward the upright position; and a cam member having a first cam surface and a second cam surface, wherein the first cam surface and the second cam surface are radially offset about the cam member such that when the backrest assembly is in a first reclining position, the first cam surface contacts a second end of one of the pair of spring members, and when the backrest assembly is in a second reclining position greater than the first reclining position, the second cam surface contacts a second end of the other of the pair of spring members, and wherein the first cam surface and the second cam surface each include a laterally extending abutment surface.

[0004] In another embodiment, a seating device includes: a seat assembly configured to support a seated user thereon; a backrest assembly movable between an upright position and a reclining position, wherein the backrest assembly is configured to support the user and extends upward from the seat assembly; and a control assembly. The control assembly includes: a pair of spring members, each having a first end and a second end, the first end operably coupled to the backrest assembly, wherein the spring members are configured to bias the backrest assembly from the reclining position toward the upright position; and a cam member having a first cam surface and a second cam surface, wherein the first cam surface and the second cam surface are radially offset about the cam member such that when the backrest assembly is in a first reclining position, the first cam surface contacts a second end of one of the pair of spring members, and when the backrest assembly is in a second reclining position greater than the first reclining position, the second cam surface contacts a second end of the other of the pair of spring members, and wherein the cam member includes a plurality of walls, and when the cam member moves between the plurality of positions, the second end of each of the pair of spring members travels along a track between the plurality of walls.

[0005] In another embodiment, a seating device includes: a seat assembly configured to support a seated user thereon; a backrest assembly movable between an upright position and a reclining position, wherein the backrest assembly is configured to support the user and extends upward from the seat assembly; and a control assembly. The control assembly includes: a spring member configured to bias the backrest assembly from the reclining position toward the upright position; and an actuator member movable between a first position, a second position, and a third position, wherein in the first position, the actuator member abuts against a stop member, thereby limiting movement of the backrest assembly from the upright position toward the reclining position; in the second position, the actuator member abuts against the spring member such that when the backrest assembly moves from the upright position toward the reclining position, the spring member biases the backrest assembly from the reclining position toward the upright position; and in the third position, the actuator member does not abut against the stop member and the spring member.

[0006] In another embodiment, a seating device includes: a seat assembly configured to support a seated user thereon; a backrest assembly movable between an upright position and an inclined position, wherein the backrest assembly is configured to support the user and extends upward from the seat assembly; and a control assembly. The control assembly includes: a spring member configured to bias the back assembly from the tilted position toward the upright position; an actuator member movable between a biased position and a non-biased position, wherein in the biased position the spring member biases the back assembly from the tilted position toward the upright position, and in the non-biased position, the spring member does not bias the back assembly from the tilted position toward the upright position when the back assembly moves from the upright position toward the tilted position; and a cam device including a first cam portion and a second cam portion connected to the actuator member, wherein the second cam portion is connected to the actuator member and is laterally movable from a first position to a second position, the first position and the second position corresponding to the biased position and the non-biased position of the actuator member, respectively.

[0007] In another embodiment, a seating device includes: a housing member; a seat assembly including a seat support member, wherein the seat assembly is configured to support a seated user; a first linkage member having a first end pivotally connected to the housing member via a first pivoting device and a second end pivotally connected to the seat assembly via a second pivoting device; and a second linkage member having a first end pivotally connected to the housing member via a third pivoting device and a second end pivotally connected to the seat support member via a fourth pivoting device; wherein at least two of the first pivoting device, the second pivoting device, the third pivoting device, and the fourth pivoting device include a shaft disposed in a slot, and wherein the shaft is fixed to prevent the shaft from sliding within the slot.

[0008] In another embodiment, a method for assembling a seating device includes: providing a housing member; providing a seat assembly including a seat support member, wherein the seat assembly is configured to support a seated user; providing a first link member having a first end and a second end; providing a second link member having a first end and a second end; connecting at least two of the following by inserting a shaft into a slot: the first end of the first link member to the housing member, the second end of the first link member to the seat support member, the first end of the second link member to the housing member, and the second end of the second link member to the seat support member; aligning the housing member, the seat support member, the first link member, and the second link member relative to each other via at least one shaft within at least one of the slots; and securing the shaft within the slot such that sliding of the shaft along the slot is prevented.

[0009] In another embodiment, a seating device includes: a seat assembly configured to support a seated user thereon; a backrest assembly movable between an upright position and a reclining position, wherein the backrest assembly is configured to support the user and extends upward from the seat assembly; and a control assembly. The control assembly includes: a fixing member; a spring configured to bias the backrest assembly from the reclining position toward the upright position, wherein the spring includes a first end and a second end, the first end being operatively coupled to the backrest assembly; and a bias adjustment member positioned between the fixing member and the second end of the spring, wherein the bias adjustment member is configured to adjust the magnitude of a biasing force applied to the backrest assembly by the spring, and wherein the bias adjustment member is configured to act as a support member between the second end of the spring and the fixing member when the second end of the spring moves relative to the fixing member.

[0010] In another embodiment, a seating device includes: a seat assembly configured to support a seated user thereon; a backrest assembly movable between an upright position and a reclining position, wherein the backrest assembly is configured to support the user and extends upward from the seat assembly; and a control assembly. The control assembly includes: a fixing member; a spring configured to bias the backrest assembly from the reclining position toward the upright position, wherein the spring includes a first end and a second end, the first end being operatively coupled to the backrest assembly; and a bias adjustment member positioned between the fixing member and the second end of the spring, wherein the bias adjustment member is configured to adjust the magnitude of a biasing force applied to the backrest assembly by the spring, and wherein the bias adjustment member cannot be adjusted without at least partially disassembling the seating device.

[0011] In another embodiment, a seating device includes: a receiver; a column member including a first portion having a first longitudinal axis and a second portion having a second longitudinal axis angled away from the first longitudinal axis, wherein the first portion is telescopically received within the receiver; an arm support coupled to the second portion of the column member and configured to support a portion of the arm of a seated user; and a locking device. The locking device includes: an actuator portion configured to allow a seated user to access the device, wherein the actuator portion is positioned along the length of the second portion of the column member; a locking portion movable between an unlocked position and a locked position, wherein in the unlocked position the first portion of the column member is telescopically adjustable within the receiver, and in the locked position the telescopic adjustment of the first portion of the column member within the receiver is prevented, wherein the locking portion is positioned along the length of the first portion of the column member; and a connector portion extending between the actuator portion and the locking portion, wherein the connector portion transmits input force from the actuator portion to the locking portion to move the locking portion between the locked position and the unlocked position, and wherein the actuator portion, the locking portion, and the connector portion are a single integral piece.

[0012] In another embodiment, a seating device includes: a seat assembly configured to support a seated user; a backrest assembly configured to support the back of the seated user, wherein the backrest assembly includes a back frame extending upward from the seat assembly; a receiver; and a column member telescopically received within the receiver. The seating device further includes: an arm support coupled to the column member and configured to support a portion of the seated user's arm; and a locking device including a locking portion and a receiving portion, wherein the locking portion is movable between an unlocked position and a locked position, in which the column member is telescopically adjustable within the receiver, and in the locked position, the locking portion engages the receiving portion, thereby preventing telescopic adjustment of the column member within the receiver, and wherein the backrest frame, the receiver, and the receiving portion are a single integral piece.

[0013] In another embodiment, a seating device includes: a seat assembly slidably movable between a foremost position and a rearmost position, the seat assembly including: a seat support structure configured to support a seated user thereon; and at least one elongated sliding support attached to the seat support structure and including a support surface and at least one stop member, wherein the support surface and the at least one stop member are a single integral piece. The seating device further includes: at least one sliding support member slidably supporting the sliding support thereon between the foremost position and the rearmost position, wherein the at least one stop member is configured to prevent the seat assembly from moving beyond at least one of the foremost position and the rearmost position.

[0014] In another embodiment, a seating device includes: a seat assembly slidably movable between a foremost position and a rearmost position, the seat assembly including: a seat support structure configured to support a seated user thereon, wherein the seat support structure is flexible; and at least one elongated sliding support attached to the seat support structure, thereby structurally reinforcing the seat support structure against deflection, wherein the at least one sliding support includes a support surface and at least one stop member. The seating device further includes: at least one sliding support member slidably supporting the sliding support thereon between the foremost position and the rearmost position, wherein the at least one stop member is configured to prevent the seat assembly from moving beyond at least one of the foremost position and the rearmost position.

[0015] In another embodiment, a seating device includes: a seat assembly slidably movable between a foremost position and a rearmost position, the seat assembly including: a seat support structure configured to support a seated user thereon; at least one elongated sliding support attached to the seat support structure, wherein the at least one sliding support includes a support surface and at least one stop member, and wherein the at least one stop member is configured to prevent the seat assembly from moving beyond at least one of the foremost position and the rearmost position; and a release portion operably coupled to the at least one stop member and configured to move the at least one stop member from the first position to the second position, wherein the release portion can be accessed from outside the seating device without the use of tools. The seating device further includes: at least one sliding support member slidably supporting the sliding support thereon between the foremost position and the rearmost position.

[0016] In another embodiment, a seating device includes: a seat assembly configured to support a seated user thereon; a control assembly supporting the seat assembly; a backrest assembly adapted to be coupled to the control assembly and extending upward from the seat assembly; and a quick-connect device for connecting the backrest assembly to the control assembly. The quick-connect device includes: a first notch and a first shaft assembly, wherein one of the back assembly and the control assembly includes the first notch, and the other of the back assembly and the control assembly includes the first shaft assembly received within the first notch; a second notch and a second shaft assembly, wherein one of the back assembly and the control assembly includes the second notch, and the other of the back assembly and the control assembly includes the second shaft assembly received within the second notch; and a locking device including a main locking member pivotable between a locked position and an unlocked position, wherein in the locked position the main locking member abuts against the second shaft assembly, thereby preventing the second shaft assembly from being removed from the second notch, and in the unlocked position the second shaft assembly is removable from the second notch, thereby allowing the back assembly to be disconnected from the control assembly.

[0017] In another embodiment, a method for assembling a seating device includes: providing a seat assembly configured to support a seated user thereon; providing a control assembly supporting the seat assembly; providing a backrest assembly adapted to be coupled to the control assembly and extending upward from the seat assembly; and connecting the backrest assembly via a quick-connect device. Connecting the back assembly includes: providing a first recess and a first shaft device, wherein one of the back assembly and the control assembly includes the first recess, and the other of the back assembly and the control assembly includes the first shaft device received within the first recess; providing a second recess and a second shaft device, wherein one of the back assembly and the control assembly includes the second recess, and the other of the back assembly and the control assembly includes the second shaft device received within the second recess; providing a locking device including a main locking member pivotable between a locked position and an unlocked position, wherein in the locked position the main locking member abuts against the second shaft device, thereby preventing the second shaft device from being removed from the second recess, and in the unlocked position the second shaft device is removable from the second recess, thereby allowing the back assembly to be disconnected from the control assembly; positioning the first shaft device within the first recess; rotating the back assembly relative to the control assembly until the second shaft device is positioned within the second recess; and pivoting the main locking member from the unlocked position to the locked position, thereby preventing the second shaft device from being removed from the second recess.

[0018] In another embodiment, a seating device includes: a seat assembly configured to support a seated user thereon; a control assembly supporting the seat assembly; a backrest assembly coupled to the control assembly and extending upward from the seat assembly; and a quick-connect device. The quick-connect device includes: a notch and a shaft assembly, wherein one of the backrest assembly and the control assembly includes the notch, and the other of the backrest assembly and the control assembly includes the shaft assembly received within the notch; and a locking device including a primary locking member movable between a locked position and an unlocked position, wherein in the locked position the primary locking member abuts against the shaft assembly, thereby preventing the shaft assembly from being removed from the notch, and in the unlocked position the shaft assembly is removable from a second notch, thereby allowing the backrest assembly to be disconnected from the control assembly, and the locking device further includes a secondary locking member operably coupled to the primary locking member and configured to prevent the primary locking member from moving from the locked position to the unlocked position.

[0019] In another embodiment, a seating device includes: a receiver; a column member telescopically received within the receiver; an arm support coupled to a second portion of the column member and configured to support a portion of the arm of a seated user; and a locking device. The locking device includes: a first link having a first end, a second end, and an actuator portion, the first end pivotally coupled to the column member, the actuator portion positioned along the length of the first link between the first end and the second end; and a second link having a first end pivotally coupled to the second end of the first link and a second end operably coupled to a locking portion, the locking portion being movable between an unlocked position and a locked position, in which the column member is telescopically adjustable within the receiver, and in which telescopic adjustment of the column member within the receiver is prevented in the locked position.

[0020] In another embodiment, a seating device includes: a generally rigid back frame including a horizontally extending top portion, a horizontally extending bottom portion, and a pair of side portions extending vertically between the top and bottom portions, wherein the top, bottom, and side portions cooperate to define an opening, and wherein at least one of the top, bottom, and side portions includes a longitudinally extending channel; a flexible back shell having a forward-facing support surface located within at least a portion of the opening and configured to support a seated user, and an attachment portion extending around at least a portion of the periphery of the support surface; and a cover member extending over at least a portion of the support surface, wherein the cover member is directly attached to the attachment portion of the back shell at an attachment location, and wherein the attachment location and the attachment portion of the back shell are located within the channel and are hidden from view.

[0021] In another embodiment, a seating device includes: a generally rigid back frame including a horizontally extending top portion, a horizontally extending bottom portion, and a pair of side portions extending vertically between the top and bottom portions, wherein the top, bottom, and side portions of the back frame cooperate to define an opening; a flexible back shell having a forward-facing support surface located within at least a portion of the opening and configured to support a seated user, and an attachment portion extending around a large portion of the periphery of the support surface; and a cover member extending over at least a portion of the support surface, wherein the cover member is directly attached to the attachment portion of the back shell around a large portion of the periphery of the support surface.

[0022] In another embodiment, a seating device includes: a seat assembly configured to support a seated user thereon in a manner movable between a first vertical position and a second vertical position different from the first vertical position; and a control device. The control device includes: a control input member capable of being grasped by the seated user and configured to rotate along a first direction and along a second direction opposite to the first direction; a first arm having a first end and a second end, the first end being coupled to rotate together with the control input member; a second arm having a first contact surface, a second contact surface, and an actuator portion, wherein the second end of the first arm is configured to contact the first contact surface of the second arm when the control input is rotated along the first direction, thereby moving the actuator portion from the first position to the second position, and wherein the first... The second end of the arm is configured to contact the second contact surface of the second arm when the control input rotates in the second direction, thereby moving the actuator portion from the first position to the second position; and a cylinder operable between an actuated state and a non-actuated state, the actuated state allowing vertical adjustment of the seat assembly between the first vertical position and the second vertical position, the non-actuated state in which the seat assembly remains in a given vertical position, and wherein the cylinder actuates from the non-actuated state to the actuated state when the actuator portion of the second arm moves from the first position to the second position.

[0023] In another embodiment, a seating device includes: a generally rigid back frame member; and a flexible back shell member coupled to the back frame member and including a pair of vertical side portions and at least two strip portions extending laterally between the side portions, the at least two strip portions including forward-facing surfaces configured to support the back of a seated user, the at least two strip portions including a lowermost strip portion, and the lowermost strip portion being configured to deflect a first distance when a seated user applies a rearward-directing force to the lowermost strip portion. The seating device further includes: a lumbar assembly supported by the back frame and configured to support a lumbar region of the back of a seated user, the lumbar assembly being configured to deflect a second distance when a seated user applies the rearward-directing force to the lumbar assembly; wherein the first distance and the second distance are generally similar.

[0024] In another embodiment, a seating device includes: a back frame member; and a lumbar assembly, the lumbar assembly being vertically adjustable relative to the back frame member, the lumbar assembly including a forward-facing support surface configured to support the back of a seated user, the support surface including a first portion and a second portion located at a different vertical height from the first portion, wherein the second portion is movable between a first position and a second position, in which the second portion is located in front of the first portion and defines a foremost surface of the support surface, and in the second position, the second portion is substantially coplanar with the first portion.

[0025] In another embodiment, a method for testing the vertical movement of a lumbar assembly of a seating device includes: providing a seat assembly having an upper surface configured to support a seated user thereon; and providing a lumbar assembly vertically adjustable relative to a back frame member, the lumbar assembly including a forward-facing support surface configured to support the back of the seated user, the support surface including a first portion and a second portion located at a different vertical height from the first portion, wherein the second portion is movable between a first position and a second position, in which the second portion is located in front of the first portion and defines a foremost surface of the support surface along the centerline of the seating device, and in the second position, the second portion is substantially coplanar with the first portion. The method further includes vertically moving the lumbar assembly relative to the upper surface of the seat assembly to a first vertical position; positioning the foremost surface of the support surface along the centerline of the seat assembly while the lumbar assembly is in the first vertical position, wherein the foremost surface of the support surface is defined by the second portion as it is in the first position; vertically moving the lumbar assembly relative to the upper surface of the seat assembly to a second vertical position, wherein the second vertical position is at a greater vertical height than the first vertical position; and positioning the foremost surface of the support surface along the centerline of the seat assembly while the lumbar assembly is in the second vertical position, wherein the foremost surface of the support surface is defined by the second portion as it is in the first position.

[0026] In another embodiment, a seating device includes: a control structure; and a seat assembly slidably supported on the control structure between a foremost position and a rearmost position. The seat assembly includes: a first stop member configured to move between the first position and the second position, wherein in the first position, the first stop member prevents the seat assembly from being detached from the support structure, and in the second position, the first stop member does not prevent the seat assembly from being detached from the support structure, wherein the first stop member is configured to abut against at least one of a first sliding guide and a first sliding support member when in the first position; and a second stop member spaced apart from the first stop member and configured to move between the first position and the second position, wherein in the first position, the second stop member prevents the seat assembly from being detached from the support structure, and in the second position, the second stop member does not prevent the seat assembly from being detached from the support structure. The seat assembly is detached from the support structure, wherein the second stop member is configured to abut against at least one of the second sliding guide and the second sliding support member when in the first position; and a third stop member, spaced apart from the first and second stop members and configured to move between a first and a second position, wherein in the first position, the third stop member prevents the seat assembly from detaching from the support structure, and in the second position, the third stop member does not prevent the seat assembly from detaching from the support structure, wherein the third stop member is located laterally outside of at least one of the first sliding guide and the first sliding support member and at least one of the second sliding guide and the second sliding support member. The first, second, and third stop members are configured such that the first, second, and third stop members must simultaneously move to the second position to detach the seat support structure from the control structure.

[0027] In another embodiment, a seating device includes: a control structure; and a seat assembly slidably supported on the control structure between a foremost position and a rearmost position. The seat assembly includes: a first stop member configured to move between a first position and a second position, wherein in the first position, the first stop member prevents the seat assembly from being detached from the support structure, and in the second position, the first stop member does not prevent the seat assembly from being detached from the support structure; a second stop member spaced apart from the first stop member and configured to move between the first position and the second position, wherein in the first position, the second stop member prevents the seat assembly from being detached from the support structure, and in the second position, the second stop member does not prevent the seat assembly from being detached from the support structure; and a third stop member spaced apart from the first stop member and the second stop member and configured to move between the first position and the second position, wherein in the first position, the third stop member prevents the seat assembly from being detached from the support structure, and in the second position, the third stop member does not prevent the seat assembly from being detached from the support structure. The first stop member, the second stop member, and the third stop member are configured such that the first stop member, the second stop member, and the third stop member must be moved simultaneously to the second position to detach the seat support structure from the control structure, wherein the seat support structure can be detached from the control structure by moving the seat support structure relative to the control structure in a fully longitudinal direction.

[0028] In another embodiment, a seating device includes: a first support structure; a second support structure having a first forward-facing surface configured to support a seated user thereon, the support structure including at least one aperture extending therethrough; and a fastener member configured to fasten the first support structure to the second support structure, the fastener member including a second forward-facing surface extending through the at least one aperture such that the second forward-facing surface of the fastener is substantially flush with the first forward-facing surface of the second support structure, the fastener member snapping into the second support structure.

[0029] These and other features, advantages and objects of the invention will be further understood and appreciated by those skilled in the art upon reference to the following description, claims and drawings. Attached Figure Description

[0030] Figure 1 This is a perspective view of an embodiment of the seating device;

[0031] Figure 2 This is a front side view of an embodiment of the seating device, showing the seat device in a lowered and raised position, as well as an upright and tilted position, and showing the seat assembly in a retracted and extended position;

[0032] Figure 3 This is an exploded view of the seat assembly;

[0033] Figure 4 This is a cross-sectional view of the connecting device between the upper and lower housing components of the seat assembly;

[0034] Figure 5 This is a top perspective view of the sliding support component;

[0035] Figure 6 This is a bottom perspective view of the sliding support component;

[0036] Figure 7 It is along Figure 1 A sectional view of the seat assembly taken along line VII-VII;

[0037] Figure 8 This is a perspective view of the seat assembly, in which the cover, padding member, and top shell member have been removed to expose the interior of the seat assembly;

[0038] Figure 9 This is an exploded view of the back components;

[0039] Figure 9A This is a perspective view of a flush-mounted fastener;

[0040] Figure 10 This is a rear perspective view of the back shell component;

[0041] Figure 11A This is an exploded perspective view of the lumbar support components;

[0042] Figure 11B1 This is a perspective view of the mounting components of the lumbar support assembly;

[0043] Figure 11B2 This is a second perspective view of the mounting components of the lumbar support assembly;

[0044] Figure 11C This is a perspective view of an alternative embodiment of the lumbar support component;

[0045] Figure 11D This is a top plan view of an alternative embodiment of the lumbar support assembly;

[0046] Figure 11E This is an exploded perspective view of an alternative embodiment of the lumbar support component;

[0047] Figure 11F This is a front side sectional view of the backrest assembly, showing point S defined by the lumbar support assembly;

[0048] Figure 12 This is a front and side sectional view of the rear component;

[0049] Figure 13 It is along Figure 1 A cross-sectional view of the connection device between the waist assembly, the back frame member, and the back shell member, taken along line XIII-XIII;

[0050] Figure 14A This is a front side view of the four-bar linkage mechanism of the seat assembly in a vertical position, with internal components shown in dashed lines;

[0051] Figure 14B This is a front side view of the four-bar linkage assembly shown as a seat assembly in an inclined position, with internal components shown in dashed lines;

[0052] Figure 15A From Figure 9 A perspective view of the quick-connect device taken from area 15A;

[0053] Figure 15B This is a front view of the quick-connect device;

[0054] Figure 15C It is along Figure 15B A front and side sectional view of the quick-connect coupling device taken from the XVC-XVC line;

[0055] Figure 16A This is a front perspective view of the locking device used for quick connection of the coupling device;

[0056] Figure 16B This is a rear perspective view of the locking device;

[0057] Figure 16C This is a front side view of the locking device;

[0058] Figure 16D This is a perspective view of the main locking part of the locking device;

[0059] Figures 17 to 19 This is a front side sectional view of the quick-connect device, showing various states in which the backrest assembly of the seat unit is connected to the control assembly;

[0060] Figure 20 This is a top perspective view of the main bias device;

[0061] Figure 21 This is a top perspective view of an alternative configuration of the main bias device;

[0062] Figure 22 This is a top perspective view of the auxiliary biasing device;

[0063] Figure 23A It is shown as being in neutral. Figure 22 A front and side sectional view of the auxiliary biasing device;

[0064] Figure 23B It is shown as being in the offset position. Figure 22 A front and side sectional view of the auxiliary biasing device;

[0065] Figure 23C It is shown as being in the locked position. Figure 22 A front and side sectional view of the auxiliary biasing device;

[0066] Figure 24 yes Figure 22 A perspective view of the control device, showing the drive gear and its driven gear;

[0067] Figure 25 This is a top perspective view of an alternative embodiment of the auxiliary biasing device;

[0068] Figure 26 yes Figure 25 Top view of the auxiliary biasing device;

[0069] Figure 27 This is a perspective view of another alternative embodiment of the auxiliary biasing device;

[0070] Figure 28 yes Figure 27 Top view of the auxiliary biasing device;

[0071] Figure 29 Is with Figure 27 A front side sectional view of the control components associated with the auxiliary biasing device;

[0072] Figure 30 This is a top-view perspective view of the vertical height control and adjustment device;

[0073] Figure 31 Is it like this? Figure 30 The front side sectional view of the adjustment device shown;

[0074] Figure 32 This is an exploded view of the arm assembly;

[0075] Figure 33 This is a top plan view of the seating assembly, showing the arm covers of the arm assembly of the seating assembly in various configurations and positions;

[0076] Figure 34 yes Figure 32 The arm cover and control assembly shown are front and side views.

[0077] Figure 35 It is along Figure 32 A perspective sectional view of the receiver portion of the back frame component, taken from the XXXV-XXXV line;

[0078] Figure 36 This is a front side view of an alternative embodiment of the arm assembly;

[0079] Figure 37 yes Figure 36 A front side view of the control unit of the arm assembly;

[0080] Figure 38 yes Figure 36 End view of the end cap of the arm assembly;

[0081] Figure 39 This is a top perspective view of an alternative embodiment of the seating arrangement, including a headrest assembly and a clothes hanger;

[0082] Figure 40 yes Figure 39 Exploded views of the backrest assembly, headrest assembly, and clothes hanger; and

[0083] Figure 41 It is a cross-sectional view of the connecting device that secures the back shell, back frame members and headrest assembly to each other. Detailed Implementation

[0084] For ease of description, the terms "up," "down," "right," "left," "back," "front," "vertical," and "horizontal," and their derivatives, should be used as follows: Figure 1 This invention is directed in the manner described herein. However, it should be understood that, unless explicitly stated otherwise, various alternative orientations and sequences of steps may be taken for the embodiments described herein. It should also be understood that the specific apparatuses and processes shown in the drawings and described in the following specification are exemplary embodiments of the concepts defined in the appended claims. Therefore, unless expressly stated otherwise in the claims, specific dimensions and other physical characteristics relating to the embodiments disclosed herein should not be considered as limiting. The various elements of the embodiments disclosed herein can be described as operatively connected to each other, including elements directly or indirectly connected to each other. Furthermore, the term "seat assembly" as used herein encompasses many seat assemblies, including but not limited to office chairs, vehicle seats, home seats, stadium seats, theater seats, etc.

[0085] Figure 10 ( Figure 1The term generally indicates a seating device embodying the invention. In the example shown, the seating device 10 includes an office chair assembly. The seating device 10 includes a simplified base assembly 12 abutting against a supporting floor surface 14, a control or support assembly 16 supported by the simplified base assembly 12, a seat assembly 18, a backrest assembly 20, and a pair of arm assemblies 22. Figure 2 The system is configured such that the seat assembly can move between a fully rearward position A and a fully forward position B, the backrest assembly 20 can move between a fully upright position C and a fully tilted position D, while the seat can move between a fully upright position E and a fully tilted position F, and the control assembly 16, seat assembly 18, backrest assembly 20, and arm assembly 22 can move between a fully lowered position G and a fully raised position H, as described below. The control assembly 16, seat assembly 18, backrest assembly 20, and arm assembly 22 are further rotatably supported above the base assembly 12 so as to pivot about axis 24 in direction 26.

[0086] Seat assembly 18 ( Figure 1 and Figure 3 The system includes a housing assembly 28, a streamlined molded foam padding member 30, and a fabric cover 32 covering the edges of the padding member 30 and the housing assembly 28. The housing assembly 28 includes a lower housing member 34 and an upper housing member 36. In the example shown, both the lower housing member 34 and the upper housing member 36 are constructed of flexible plastic. The upper housing member 36 (… Figure 3 and Figure 4 The upper housing member 36 is connected to the lower housing member 34 via a plurality of snap-fit ​​coupling devices 37, which include a plurality of first coupling portions 38 positioned around the periphery of the upper surface 40 of the lower housing member 34 and extending upward from the upper surface 40, and a plurality of second coupling portions 42 positioned around the periphery of the bottom surface 44 of the upper housing member 36 and extending upward from the bottom surface 44. As shown, the first coupling portions may include hook-like devices, while the second coupling portions 42 may include tab devices, wherein the second coupling portions 42 are configured to be slidably received within the first coupling portions 38 in direction 46. The upper housing member 36 is further secured to the lower housing member 34 by a plurality of mechanical fasteners, such as screws (not shown), that prevent the second coupling portions 42 from disengaging from the first coupling portions 38.

[0087] The seat assembly 18 also includes a pair of sliding support members 48 configured to slidably support the seat assembly 18 on the control assembly 16. Figure 3 , Figure 5 and Figure 6In the example shown, each elongated support member 48 includes a first end 50, a second end 52, and a downwardly facing support surface 54 extending therebetween. Each support member 48 also includes a first stop member 56 positioned adjacent to the first end 50 and a second stop member 58 positioned adjacent to the second end 52. The first stop member 56 includes a downwardly extending abutment surface 57, while the second stop member 58 includes a downwardly extending flexible tab 60 having a vertically extending abutment surface 62. The tab 60 is positioned along the flexible arm 64 and is movable between a lowered or non-flexible position and an elevated or flexed position, in which the abutment surface 62 extends below the support surface 54, and in the elevated or flexed position, the abutment surface 62 is positioned above the support surface 54. Each support member 48 also includes an actuator portion 66 integrally formed with the arm 64 at its distal end, such that movement of the actuator portion 66 in the vertical direction also moves the abutment surface 62 between its lowered and elevated positions. During assembly, the support member 48 is assembled together with the lower housing member 34 of the housing assembly 28 such that the actuator portion 66 extends through a corresponding aperture 68 in the lower housing member 34, allowing the user to access the actuator portion 66 from the outside of the seat assembly 18. Each support member 48 also includes a longitudinally extending channel 70 that extends along the edge of the support surface 54 and is configured to slidably connect the seat assembly 18 to the control assembly 16, as described below.

[0088] like Figure 7 and Figure 8 As best shown, the control assembly 16 includes a housing member 72 fixed for movement relative to the ground and a pair of elongated L-shaped sliding support rails 74 fixed to the housing 72 via a plurality of mechanical fasteners such as screws (not shown). In the example shown, each sliding support rail 74 includes an upwardly arranged support surface 76 configured to slidably support a support surface 54 of one of the sliding support members 48. During assembly, the seat assembly 18 is slidably coupled to the control assembly 16 so that the sliding support rails 74 are slidably inserted into the channels 70 of the sliding support members 48 at the foremost position A. Figure 2The slide support member 48 moves longitudinally between its lowered position and its final position B. When the slide support member 48 begins to engage with the slide support guide 74, the tab 60 abuts against the front edge 78 of the slide support guide 74, thereby deflecting the tab 60 from its lowered position to its raised position. The tab 60 then slides along the support surface of the slide support guide as the seat assembly 18 moves rearward relative to the control assembly 16 until the tab 60 reaches the rear edge 80 of the slide support guide 74 and snaps downward from its raised position to its lowered position. In use, the rearward longitudinal travel of the seat assembly 18 relative to the control assembly 16 is limited by the abutment surface 57 against the front edge 78 of the slide support guide 74, while the forward longitudinal travel of the seat assembly 18 relative to the control assembly 16 is limited by the abutment surface 62 of the tab 60 against the rear edge 80 of the slide support guide 74. By applying an upward force to the actuator portion 66 of each sliding support member 48, thereby moving the abutment surface 62 from a lowered position to a raised position, the seat assembly 18 can be removed from its attachment to the control assembly 16. This allows the abutment surface 62 to leave the rear edge 80 of the sliding support guide rail 64 as the seat assembly 18 moves from the rearmost position a towards the foremost position B. It should be noted that the actuator portion 66 can be accessed from the outside of the seat assembly 16, and the actuator portion 66 can be actuated without the use of a separate tool.

[0089] The seat assembly 18 and the control assembly 16 are also configured to allow the user to lock the seat assembly 18 in the rearmost position A. Figure 2 At the predetermined position between () and the foremost position B. For example Figure 8 As shown, the seat assembly 18 also includes a locking device 82, which includes a locking member 84 slidably disposed within the housing assembly 28. In the example shown, the locking member 84 includes a planar body portion 86 that is sandwiched between the lower housing member 34 and the upper housing member 36. Figure 7The locking member 84 can slide between an engaged position Y and an unengaged position Z. A pair of teeth 88 extending laterally inward from the main body 86 are configured to selectively engage two of a plurality of recesses 90 spaced longitudinally along one of the sliding support rails 74. A handle portion 92 extends downward from the main body 86 and passes through a hole 94 within the lower housing member 34. The handle portion 92 is configured for easy gripping by the user, allowing the user to move the locking member 84 between a locked position Y and an unlocked position Z. A coil spring 96 biases the locking member 84 from the unlocked position Z toward the locked position Y. In operation, the user can grip the handle portion 92 and move the handle portion 92 in direction 98, thereby overcoming the biasing force exerted on the locking portion 84 by the coil spring 96 and disengaging the pair of teeth 88 of the locking member 84 from the recesses 90 of the sliding support rail 74, thereby allowing longitudinal adjustment of the seat assembly 18 relative to the control assembly 18 between a rearmost position A and a foremost position B. Once the selected position is reached, the operator releases the force applied to the handle portion 92, thereby allowing the spring 96 to bias the teeth 88 of the locking member 84 into engagement with the corresponding aperture 90, thus preventing further sliding of the seat assembly 18 relative to the control assembly 16. In an alternative embodiment, the seat assembly 18 can be removed from its attachment to the control assembly 16 simply by applying an upward force to the actuator portions 66 of the two sliding supports 48 while moving the handle portion 92 of the locking device 82 and disengaging the teeth 88 from the recesses 90 of the sliding support guide 74. This configuration requires three separate inputs to the seat assembly 18 and the control assembly 16 to detach the seat assembly 18 from the control assembly 16. It should be noted that the actuator portions 66 and the handle portion 92 are sufficiently spaced apart from each other, making it difficult for a single operator to move all three portions without making a specific effort.

[0090] Back component 20 ( Figure 1 and Figure 9The seat assembly 100 includes a generally rigid back frame member 102, a flexible back shell member 104, a lumbar support assembly 106 slidably positioned between the back frame member 102 and the back shell member 104, and a fabric cover 108 covering the back shell member 104. It should be noted that although the example shown includes a cover 108 covering the lumbar support assembly, the seat assembly 10 may also include a back shell member constructed in various ways that is not covered by the cover assembly, wherein the back shell member itself provides a forward-facing surface on which the back of the seated user is supported, or may also include other material layers, such as comfort surfaces, molded foam inserts, etc. In the example shown, the back frame member 102 comprises a metal such as aluminum and includes a horizontally extending upper frame portion 110, a horizontally extending lower frame portion 112, and a pair of side frame portions 114 extending vertically between the upper frame portion 110 and the lower frame portion 112. The back frame member 102 also includes a horizontally extending intermediate frame portion 118 that extends between the side frame portions 114 and is located between the upper frame portion 110 and the lower frame portion 112. The upper frame portion 110, the intermediate frame portion 118, and the side frame portions 114 cooperate with each other to form an open interior space 120 over which the back shell member 104 extends. The upper frame portion 110, the intermediate frame portion 118, and the side frame portions 114 are each provided with a U-shaped cross-sectional configuration, thereby providing a forward-opening channel 122 extending around the periphery of the interior space 120. The frame member 112 may also include a plurality of integral tab members 124 that extend into the channel 112 and are spaced apart around the periphery of the interior space 120.

[0091] Back shell component 104 ( Figure 9 and Figure 10The back shell member 104 includes a horizontally extending upper shell portion 126, a horizontally extending lower shell portion 128, and a pair of side shell portions 130 extending vertically between the upper shell portion 126 and the lower shell portion 128. The back shell member 104 also includes a plurality of horizontally extending flexible strips 132 extending between the side shell portions 130 and cooperating to define a plurality of grooves 133 therebetween. In this embodiment, the back shell member 104 is configured with a forward-facing convex configuration along a central longitudinal extension axis and a forward-facing concave configuration along a central transverse extension axis. In the example shown, the strips 132 converge toward the upper portion of the entire back shell member 104, wherein the lowermost strip 134 of the plurality of strips 132 cooperates with the lower shell portion 128 to define an open interior space 136 in which the waist assembly 106 is positioned. However, other configurations of the back shell member 104 may also be provided, wherein the waist assembly 106 is absent and the strip 104 extends throughout the entire internal space 136 between the upper shell portion 126 and the lower shell portion 128. Other configurations of the strip 132 may also be used, including angled or curved configurations. Moreover, although the back shell member 104 of this embodiment comprises an integrally molded single-piece unit, other configurations, including multi-piece configurations, may also be adopted. The back shell member 104 also includes a tab member 138 that extends around most of the outer periphery of the back shell member 104, except for the corner 140 of the back shell member 104 located between the bottom shell portion 128 and the side shell portion 130. The tab member 138 includes a plurality of length-spaced holes 142 extending through the tab member 138 and along the side housing portion 130 of the tab member 138, and a plurality of length-spaced holes 144 extending through the tab member 138 and along the top housing portion 126 of the tab member 138, wherein the holes 142, 144 are used to connect the back housing member 104 to the back frame member 102, as described below.

[0092] Waist component 106 ( Figure 9 and Figure 11AThe device includes a housing assembly 146, which includes a front housing member 148 and a rear housing member 150. In the illustrated embodiment, the front housing member 148 includes a forward-facing support surface 152, which is convex in its vertical direction and concave in its lateral direction. The front housing member 150 also includes a pair of attachment tabs 154 that extend outward from their ends and are recessed rearward from the support surface 152. The front housing member 148 also includes a pair of centrally located apertures 156 configured to receive mechanical fasteners such as screws 158 therethrough. The rear housing member 150 is configured to be integrally similar to the front housing member 158 and includes an outer wall 160 extending peripherally, a pair of apertures 162 positioned adjacent to the outer end of the rear housing member 150, and a pair of forward-extending mounting bosses 164 configured to receive screws 158 therein in a threaded connection. The waist assembly 106 also includes a concave leaf spring member 166 and a pair of mounting members 168 connected to the end 167 of the spring member 166. For example... Figure 11B1 As best shown, each mounting member 168 includes a groove 170, a tab 172, and a hook device 174. The groove 170 is defined around a boss 171 and houses the end 167 of a spring 166 therein. The tab 172 is received in a corresponding aperture 162 of the rear housing member 150. The hook device 174 is slidably received in a channel 122 of the side frame portion 114 of the back housing member 104, as described below.

[0093] During assembly, the spring member 166 and the mounting member 168 are connected to the rear housing member 150 by inserting the end 167 of the spring member 166 into the corresponding hole 162 of the rear housing member 150 and positioning the end 167 of the spring member 166 within the groove 170 of the mounting member 168. Then, the front housing member 148 is connected to the rear housing member 150 by inserting the tab 154 of the front housing member 148 into the recess 162 of the rear housing member 150, then inserting the screw 158 through the hole 156 of the front housing member 148 and screwing the screw 158 into the mounting boss 164 of the rear housing member 150. Finally, the waist support assembly 106 is connected by inserting the hook device 174 of each mounting member 168 into the channel 122 of the side frame portion 114. Figure 9 and Figure 13The hook device 174 is connected to the back frame member 102. In the illustrated embodiment, each hook device 174 includes a rearwardly extending portion 176 received within a channel 122, and a laterally inwardly extending portion 178 received within a laterally inwardly extending undercut portion 180 of the channel 122. As the channel 122 and its undercut portion 180 extend longitudinally along the length of the side frame portion 114, the waist support assembly 106 is vertically adjustable within the space 136 of the back housing member 104. C-shaped spring member 181 ( Figure 11B1 and Figure 13 The hook device 174 extends and includes an inwardly extending central engagement portion 183, the central engagement portion 183 being configured to engage a plurality of relief notches 185 spaced apart along the inner surface of the channel 122. Figure 9 Select one of the options, thereby holding the waist assembly 106 at the selected vertical portion.

[0094] like Figure 12 As best illustrated, the lowermost strip portion 134 of the back shell member 104 and the lumbar assembly 106 deflect or move backward by a similar distance when a rearward force is applied to them, thereby improving the comfort of the seated user. Specifically, the lower strip portion 134 of the back shell member 104 and the lumbar assembly 106 are configured such that when the same rearward force F is applied to both the lowermost strip portion 134 and the lumbar assembly 106 by the seated user, both the lowermost strip portion 134 and the lumbar assembly 106 deflect backward by an amount X. In this way, when the back shell member 104 and the lumbar assembly flex, the front surface 135 of the lowermost strip 134 and the forward-facing support surface 152 remain aligned with each other along the forward-facing convex configuration of the back shell member 104, thereby maintaining a smooth, comfortable support surface for the seated user.

[0095] The outer perimeter 182 of the covering 108 Figure 13 The cover 108 is directly sewn to the tab member 138 via multiple stitches 184 around most of the back shell member 104. In this embodiment, the outer periphery 182 of the cover 108 is directly attached to the tab member 138 along its entire length. As previously described, the tab member 138 extends around most of the outer periphery of the back shell member 104, except at corner 140. Other embodiments may include a tab member 138 extending around the entire periphery of the back shell member 104 without any interruption, such that the outer periphery 182 of the cover 108 can be directly secured to the tab member 138 around the entire periphery of the back shell member 104. Furthermore, although the outer periphery 182 is directly attached to the tab member 138 via stitching in the example shown, other suitable fastening methods may be used, including adhesives, acoustic welding, in-mold molding, etc.

[0096] The assembly consisting of the back shell member 104 and the cover 108 is attached to the back frame member 102 by inserting the tab member 138 of the back shell member 104 and the outer periphery 182 of the cover 108 into the channel 122 of the back frame member 102, such that after assembly, the tab member 138 of the back shell member 104 and the outer periphery 182 of the cover 108 are hidden within the channel 122 of the back frame member 102 and are not visible. In the example shown, the hook device 174 of the waist assembly 106, the tab member 138 of the back shell member 104, and the outer periphery 182 of the cover 180 are all accommodated within the same channel 122, thereby reducing the total packaging space used for the associated connections. In the example shown, the back shell member 104 is secured to the back frame member 102 by connecting the tab member 124 of the back frame member 102 to the associated aperture 142 of the back shell member 104 and by a plurality of mechanical fasteners 183, 185, as further described below.

[0097] The back frame member 102 also includes a plurality of integrally formed abutment tabs 125 located within a U-shaped channel 122 of the back frame member 102 and spaced apart along the side frame portion 114. The tabs 125 extend from the inner wall 127 of each side frame member 114 into the channel 122 and are configured to abut against tabs 138 of the back shell member 104, thereby limiting the inward deflection of the side shell portion 130 of the back shell member 104 in response to a rearwardly pointing force exerted on the back shell member 104 by the back of a seated user.

[0098] In use, the housing assembly 146 of the lumbar support assembly 106 is configured to slide along the length of the spring member 166 in the lateral direction 186, thereby allowing the support surface 152 of the housing assembly 146 to be centered relative to the back of the seated user when the user may not be centered relative to the entire back assembly 20. In the example shown, each end 188 of the housing assembly 146 is provided with a rearwardly convex curved abutment surface 190 configured to abut against a corresponding forward-concave curved abutment surface 192 of the corresponding mounting member 168. In operation, if the housing assembly 146 of the lumbar support assembly 106 slides to an off-center position during the rearward deflection of the back housing member 104 and the movement of the user within the chair, as the rearward deflection of the back housing member 104 decreases, the abutment surface 190 of the housing assembly 146 abuts against the abutment surface 146 of the mounting member 168, thereby pushing the housing assembly 146 of the lumbar support assembly 106 toward a centered position within the interior space 136.

[0099] Figure 106a ( Figure 11C-11E This generally indicates another embodiment of the waist assembly. Since the waist assembly 106a is similar to the previously described waist assembly 106, therefore... Figure 11A and Figure 11B and Figures 11C to 11E Correspondingly similar components are indicated by the same corresponding reference numerals, except that the latter's reference numerals include the suffix "a". Waist assembly 106a ( Figure 11C -to Figure 11E The device includes a housing assembly 146a, a pair of support handles 168a, a spring member 166a extending between the handles 168a, and a biasing member 167a. The housing assembly 146a includes a front housing member 148a and a rear housing member 150a. The spring member 166a is positioned between the front housing member 148a and the rear housing member 150a, and the housing members 148a and 150a are connected together via hardware such as screws 158a. The front housing member 148a includes a forward-facing support surface 152a and a laterally extending flexible slat 153a, the flexible slat 153a being positioned between an upper portion 155a and a lower portion 157a of the support surface 152a and partially spaced apart from the upper portion 155a and the lower portion 157a by a gap or slot 149a. The slat 153a flexes more readily in the front-rear direction 159a than the entire housing assembly 146a, particularly the upper portion 155a and lower portion 157a of the front housing member 148a. A biasing member 169a, such as a coil spring, is positioned between the slat 153a of the rear housing member 150a and the front housing member 148a, thereby biasing the slat 153a in the forward direction 161a. The biasing force exerted on the slat 153a by the biasing member 167a is relatively small, making it easy for the slat 153a to shift backward when contacted by the back of a seated user. The slat 153a located at the front defines an "S-point" or foremost point of the back assembly 20 in the lumbar region at the central plane or centerline of the back assembly 20 in the front-rear direction, and provides a specific point from which the lumbar assembly 106a is positioned relative to the upper surface 107 of the seat assembly 18. Figure 11F The vertical adjustability of the S point. One method for determining the position of the S point involves horizontally rearwardly moving a vertical straight edge 109 along the upper surface 107 of the seat assembly 18 until the straight edge contacts the foremost surface of the back assembly 20 located in the waist region at the centerline of the back assembly 20. In this example, the foremost surface would be the front surface of the slat 153a of the front housing member 148a. Another method involves projecting a vertical laser beam from a "car" movable along a horizontal track until the beam illuminates the foremost surface of the back assembly 20 located in the waist region at the centerline of the back assembly 20. It should be noted that if the foremost surface of the back assembly comprises a series of equidistant points, the S point is determined as the midpoint of that surface within the waist region of the back assembly. As an example, the two relative vertical positions of the S point are... Figure 11FThe diagram shows a lowered position I located at a vertical distance X from the upper surface 107 of the seat assembly 18, and an elevated position J located at a vertical distance X' from the upper surface 107 of the seat assembly 18. In use, the backward pressure applied to the slat 153a by the back of the seated user causes the slat 153a to flex backward, such that the slat 153a is substantially flush with the upper portion 155a and lower portion 157a of the support surface 152a. The waist assembly 106a and the back assembly 20 can be configured such that the vertical travel of point S defined by the slat 153a relative to the upper surface 107 of the seat assembly 18 is preferably at least 50 mm, more preferably at least 80 mm, and most preferably at least 100 mm. Furthermore, the waist assembly 106a and the back assembly 20 can be configured such that the distance between the S point defined by the slat 153a and the upper surface 107 of the seat assembly 18 is preferably from about 170 mm to about 250 mm, and more preferably from about 150 mm to about 250 mm.

[0100] Control component 16 ( Figure 14A The assembly includes a housing component 194, a sliding support rail 74, a front linkage component 198, and a rear linkage component 214. The housing component 194 is operably connected to the base assembly 12. Figure 1 The support assembly 196, the front link member 198 having a first end 200 pivotally connected via a shaft member 204 to a front end 202 of each sliding support rail 74 for movement about a pivot axis 206, and a second end 208 pivotally connected via a shaft member 210 to the housing member 194 for movement about a pivot axis 212; the rear link member 214 having a first end 216 pivotally connected via a shaft member 220 to a rear end 218 of each sliding support rail 74 for movement about a pivot axis 212, and a second end 228 pivotally connected via a shaft member 230 to the housing member 194 for movement about a pivot axis 232. The housing member 194, the sliding support rails 74, the front link member 198, and the rear link member 230 cooperate to form a structure that allows the back assembly 20 ( Figure 2 , Figure 14A and Figure 14B A four-bar linkage assembly 231 that moves between an upright position C and an inclined position D, and allows the seat assembly 18 to move between an upright position E and an inclined position F.

[0101] Each sliding support rail 74 (FIG. 14a) is provided with an elongated aperture 240 at the front and an elongated aperture 242 at the rear, the elongated apertures 240 and 242 being configured to slidably accommodate shaft member 204 and shaft member 220, respectively. During assembly, the end 244 of shaft member 204 is connected to the front connecting rod member 198 and slidably accommodated within the elongated aperture 240, allowing shaft member 204 to be adjusted in direction 248 along the length of aperture 240, and the end 246 of shaft member 220 is connected to the rear connecting rod member 214 and slidably accommodated within the elongated aperture 242, allowing shaft member 220 to be adjusted in direction 248 along the length of aperture 242. After the shafts 204 and 220 are pre-assembled within the apertures 240 and 242, the relative positions of the components of the four-bar linkage 231 can be adjusted by sliding the ends 244 and 246 of the shafts 204 and 220 along direction 248 to ensure proper alignment of the components relative to each other. This reduces "tilting" within the overall assembly due to stacking tolerances and / or ensures the correct orientation of the back assembly 20 and / or the seat assembly 18 when in their respective fully upright positions. Proper alignment can be determined by securing the four-bar linkage 231 within a fixing device, by pre-marking one or more components of the four-bar linkage 231, by adjusting the four-bar linkage 231 until a stop member within the system is reached, by visual calibration, or other methods suitable for ensuring proper alignment. After proper alignment is determined and the four-bar linkage 231 is positioned in the appropriate configuration, the ends 244 and 246 of the shaft members 204 and 220 are fixed to the associated frame guide rail support 74 via rail riveting, welding, or the like.

[0102] Back assembly 20 consists of quick-connect device 250 ( Figure 9 Connected to control assembly 16, the quick-connect device includes a connecting portion 252 integrally molded with the lower frame portion 112 of the back frame member 102. Figures 15A-15C ) and locking device 254 Figures 16A-16BIn the example shown, the connecting portion 252 extends forward from the lower frame portion 112 of the back frame member 102 and includes a laterally extending U-shaped upper channel 256, a laterally extending U-shaped lower channel 258 offset downward and rearward from the upper channel 256, and a pair of inwardly extending pivot bosses 260. The locking device 254 includes a main locking device 262 and a secondary locking device 264. The main locking device 262 includes a locking portion 266, which includes an abutment surface 272 and a pair of outwardly and oppositely arranged recesses 268, both of which can enter via end slots 270. The primary locking device 262 further includes a leaf spring 264 having a biasing portion 278 and a clamping portion 276 clamping to the primary locking portion 266. Both the clamping portion 276 and the biasing portion 278 include downwardly extending fingers 280 configured to engage a connecting portion 252 of the back frame member 162. The secondary locking device 264 includes a secondary locking portion 282, which includes a release portion 284 and an abutment portion 286, and is pivotally coupled to the locking portion 266 of the primary locking device 262. The secondary locking device 264 also includes a spring member 288 biasing the release portion 284 and the abutment portion 286, as described below.

[0103] The back assembly 20 and control assembly 16 are assembled by aligning the back assembly with the control assembly 16, such that the upper channel 256 of the connecting portion 252 is aligned with the shaft member 220 of the control assembly. The back assembly 20 moves forward relative to the control assembly until the shaft member 222 is at least partially received within the upper channel 256. The back assembly 20 then moves forward in the forward direction while simultaneously rotating in the downward direction, thereby pushing the shaft member 230 into the lower channel 258, and the locking device 254 moves to the locked position. Figures 17 to 19As best shown, the shaft member 230 and / or one of the bushing members 302 abuts against the release portion 284 of the secondary locking device 264, thereby moving the release portion 284 and the abutment portion 286 from the locked position to the unlocked position and allowing the shaft member 232 to enter the lower channel 258. As the shaft member 230 enters the recess 258, the locking portion 266 rotates downward until the abutment surface 272 of the locking portion 266 abuts against the bushing member 302. Once the shaft member 230 is seated within the lower channel 258, the abutment portion 286 of the secondary locking portion 282 is biased from the unlocked position to the locked position by the spring member 288, in which the abutment portion 286 abuts against the inner wall of the channel 258. It should be noted that the primary locking device 262 cannot move from the locked position to the unlocked position unless the abutment portion 286 of the secondary locking device 264 moves from its locked position to the unlocked position first. By manually or with the aid of a tool, force can be applied to the release portion 284 along direction 304, and the abutment portion 286 of the secondary locking portion 282 can be moved from the locked position to the unlocked position. Once the abutment portion 286 of the secondary locking portion 282 has moved from its locked position to the unlocked position, the locking portion 266 of the main locking device 262 can be moved from the locked position to the unlocked position, thereby allowing the back assembly 20 to be removed from the control assembly 16.

[0104] In some cases, the distance between the pivot axis 271 and the bushing member 302 may vary due to stacking tolerances and / or due to wear of the entire seating assembly over time. Therefore, the abutment surface 272 may include a plurality of slots 273 spaced apart along its length. Figure 16B From pivot point 271 of pivot boss 260 ( Figure 16C and 16D The distance to the groove of each slot 273 gradually increases from the bottom to the top of the main locking portion 266, i.e., R2 is greater than R1. As previously described, the main locking portion 266 rotates downward to abut against the bushing member 302, thereby preventing the shaft 260 from being removed from the recess 258. By allowing the main locking member 266 to continue rotating downward and securely locking the shaft 230 and bushing 302 within the recess 258, the various distances R1, R2, etc., allow for such variations that may occur due to stacking tolerances, component wear, etc. As the distance increases due to either stacking tolerances and / or system settling / wear, the main locking member 266 continues to optimize the locking abutment and absorb any clearance within the system.

[0105] Turn now Figure 20The main biasing device 306 includes a helical spring 308 configured to bias the back assembly 20 from an inclined position D toward an upright position C. In the illustrated embodiment, the helical spring 308 includes a coiled body portion 310, a first end 314, and a second end 316. The coiled body portion 310 is coiled around a spacer 312 positioned about a shaft member 210. The first end 314 is biased against a housing member 194, and the second end 316 is biased against a shaft member 204 via a spacer / support member. In the illustrated example, the spacer / support member 318 includes a body portion 320 extending at least partially about the shaft member 204, and a connecting portion 322 integrally formed with the body portion 320. The connecting portion 322 includes a recess 324 in which the second end 316 of the helical spring 308 is received. The spacer / support member 318 is configured to hold the second end 316 of the spring 308 in place and to act as a support between the second end 316 of the spring 308 and the shaft member 204 when the back assembly moves between the upright position C and the tilted position D.

[0106] In an alternative embodiment, spacer / support member 318a ( Figure 21 The mechanism is configured to allow adjustment of a preset bias applied to the four-bar linkage 231 by a coil spring. The spacer / support member 318a is similar to the spacer / support member 318, with the most notable exception being that it includes multiple recesses 324a, 324b, and 324c instead of a single recess 324. It should be noted that each of the recesses 324a, 324b, and 324c has a different depth relative to each other, such that the bottom of each of the recesses 324a, 324b, and 324c is at a different distance from the axis 48 of the shaft member 244. The different depths of each of the recesses 324a, 324b, and 324c allow for the preset tension applied to the backrest assembly 20 by the main biasing device 306 during the manufacture of the chair, and these different depths integrate the preset adjustment device within the support member, thereby reducing the relative overall package volume. It should be noted that this device prevents a temporary user from adjusting or manipulating the back-bias pretension within the system without significantly disassembling the entire seat assembly 10.

[0107] Auxiliary biasing device 326 ( Figure 22 The back assembly 20 is configured to further offset from the tilted position D toward the upright position C, and can be in the neutral or non-advanced position. Figure 23A ), advance or offset position ( Figure 23B ) and locking position ( Figure 23CThe back assembly 20 can be selected between the tilt position D and the upright position C. In the push or bias position, the auxiliary biasing device 326 provides an additional biasing force to move the back assembly 20 from the tilt position D toward the upright position C. In the locked position, it prevents the back assembly 20 from moving from the upright position C toward the tilt position D. The auxiliary biasing device 326 includes a coil spring 328, which includes a body portion 330, a first end 334, and a second end 338. The body portion 330 is coiled around a positioning spacer 332, which is positioned about a shaft member 210. The first end 334 is biased against the shaft member 204 via a spacer / support member 336, which is configured similarly to the spacer / support member 318 as described above. The second end 338 extends in the opposite direction to the first end 334. The auxiliary biasing device 326 also includes an actuator arm 340, which is pivotally coupled along its length to a pivot axis 342 fixed to the housing member 194, such that the actuator arm 340 pivots about a pivot axis 344. The actuator arm 340 also includes a first end 346 and a second end 350, the first end 346 including a front opening channel 348 for receiving a second end 338 of a spring 328, and the second end 350 including a stop surface 352.

[0108] In operation, the control input knob 354 can be grasped and rotated by the user to move the auxiliary biasing device 326 between a neutral position, a biased position, and a locked position. The input knob 354 is pivotally fixed to the end of an input shaft 356, which extends laterally across and is rotatably coupled to the housing member 194. Drive gear 358 ( Figure 24 The input gear 358 is fixed to the end of the input shaft 356 opposite to the input knob 354 and receives input force applied to the input knob 354 by the operator. The input gear 358 includes a plurality of teeth 360 spaced apart around its outer periphery, an outer wall 362 extending around the periphery of the gear 358, and a recess 364 extending into the outer wall 362. The output gear 366 is fixed to rotate with the end of the pivot shaft 342 of the member 300 and includes a plurality of teeth 368 spaced apart around its edge. The output gear 366 also includes alignment teeth 370 spaced alternately from the teeth 368, extending laterally outward from the outer surface of the output gear 366. In the example shown, the alignment teeth 370 are configured to be received within the relief 364 of the input gear 358, thereby ensuring proper alignment of the input gear 366 and the output gear 358. Figure 23AIn the neutral position shown, actuator arm 340 is positioned such that actuator arm 340 does not engage the second end 338 of spring 328, so that spring 328 does not apply a biasing force to the four-bar linkage 231 to bias the back assembly 20 from the tilt position D toward the upright position C. To provide an auxiliary biasing force to the back assembly 20 by auxiliary biasing device 326, actuator arm 340 moves as shown in the diagram. Figure 23B The auxiliary propulsion position shown is such that when the back assembly moves from the upright position C to the tilted position D, the actuator arm 340 abuts against the second end 338 of the spring 328, and the spring member applies a force to the four-bar linkage 231, thereby biasing the back assembly 20 from the tilted position D towards the upright position C. The actuator arm 340 can be further moved to, as shown in the figure. Figure 23C The locked position shown causes the stop surface 352 of the second end 350 of the actuator arm 340 to abut against the stop member 372 of the second link member 214, thereby preventing the back assembly 20 from moving from the upright position C toward the tilted position D.

[0109] Figure reference 326a ( Figure 25 and Figure 26 This generally indicates another embodiment of the auxiliary biasing device within the control assembly 16a. Since the auxiliary biasing device 326a and the associated control assembly 16a are similar to the previously described auxiliary biasing device 326 and control assembly 16, therefore... Figures 22 to 24 as well as Figures 25 to 26Correspondingly similar components are indicated by the same corresponding reference numerals, except that the latter includes the suffix "a". In the example shown, the auxiliary biasing device 326a includes a helical spring 374 having a body portion 376, a first end portion 380, and a second end portion 384. The body portion 376 is coiled around a spacer member 378, which is positioned about a shaft member 210a. The first end portion 380 engages a structural reinforcement member 382, ​​which has a first end portion pivotally connected to the shaft member 210a and a second end portion pivotally connected to the shaft member 204a for pivoting together with and structurally reinforcing the front link member 198a. The auxiliary biasing device 326a also includes an actuator device 386, which includes a first cam member 388, a second cam member 390, and an actuator arm 392 fixed to the second cam member 390. Similar to the description above regarding the auxiliary biasing device 326, the auxiliary biasing device 326a is adjustable between a neutral position, a biased position, and a locked position. The operator can adjust the auxiliary biasing device 326a between these positions by gripping and rotating the input knob 354a in direction 355a. The first cam member 388 is fixed to rotate with the housing member 194a, while the second cam member 390 is fixed to rotate with the input shaft 356a, such that rotation of the input knob 354a and the input shaft 356a drives the cam surfaces 394 of the first cam member 388 and the second cam member 390 to abut against each other, thereby resisting the biasing force of the biasing spring 398 extending about and along the length of the input shaft 356a, and driving the second cam member 390 and the actuator arm 392 in direction 396. In this embodiment, the cam surfaces 394 of the first cam member 388 and the second cam member 390 are graduated, thereby allowing the first cam member 388 and the second cam member 390 to be selectively positioned relative to each other. In such a way... Figure 26In the first position shown, the actuator arm 392 is not aligned with the second end 384 of the spring 374, such that when the back assembly 20 moves from the upright position C to the tilted position D, the second end 384 of the spring 374 rotates freely without applying a biasing force to the back assembly 20. When the actuator arm 392 moves laterally from the first position or the neutral position to the second position or the biased position, the actuator arm 392 is aligned with the second end 384 of the spring 374, such that when the back assembly 20 moves from the upright position C toward the tilted position D, the actuator arm 392 abuts against the second end 384 of the spring 374 and the housing member 194a, causing the spring 374 to deflect and apply a biasing force to the four-bar linkage 231a, thereby biasing the back assembly 20 from the tilted position D toward the upright position C. When the actuator arm 392 moves laterally from the second position or the offset position to the third position or the locked position, the actuator arm 392 aligns with the structural reinforcement arm 382 and the housing member 194a, such that when the user attempts to move the back assembly 20 from the upright position C to the tilted position D, the actuator arm 392 abuts against the structural reinforcement arm 382 and the housing member 194a, thereby preventing the back assembly 20 from moving from the upright position C to the tilted position D and effectively locking the back assembly 20 in the upright position C.

[0110] Figure reference 326b ( Figures 27 to 29 This generally indicates another embodiment of the auxiliary biasing device within the control assembly 16b. Since the auxiliary biasing device 326b and the associated control assembly 16b are similar to the previously described auxiliary biasing device 326a and control assembly 16a, therefore... Figure 25 and Figure 26 as well as Figures 27 to 29 Correspondingly similar components are indicated by the same corresponding reference numerals, except that the latter includes the suffix "b". In the example shown, control assembly 16b includes housing member 194b, a pair of sliding support rails 74b, and rear linkage member 214b, the rear linkage member 214b having a first end 216b pivotally connected to the rear end 218b of the sliding support rails 74b and a second end 228b pivotally connected to the housing member 194b via shaft member 230b. The front end 202b of the sliding support rails 74b floats relative to the housing member 194b. The main biasing device 306b includes a coil spring 308b having a first end biased against the housing member 194b and a second end 316b biased against the sliding support rails 74b at position 400, thereby biasing the sliding support rails 74b relative to the housing member 194b in direction 402.

[0111] The auxiliary biasing device 326b includes a pair of helical springs, including a first helical spring 404 and a second helical spring 406. Each of the first and second helical springs 404 and 406 includes a body portion 408 coiled around a spacer 410—positioned about a shaft member 230b—and a linkage member operably coupled to a first end (not shown) of the back assembly 20 or operably supporting the back assembly 20. The first helical spring 404 includes a second end 412, and the second spring 406 includes a second end 414. The auxiliary biasing device 326b also includes an actuator device 416, which includes a cam 418 having a first radially extending track 420 and a second radially extending track 422, each defined by a plurality of radially extending guide walls 424, between which the ends 412 and 414 of the springs 404 and 406 are guided, as described below. The first track 420 includes a laterally extending first cam wall 430, while the second track 422 includes a laterally extending second cam wall 432 radially spaced from the first cam wall 430. Figure 28 As best shown, the second end 412 of the first spring 404 travels along the first track, while the second end 414 of the second spring 206 travels along the second track 422. In operation, the operator can adjust the auxiliary bias force applied to the back assembly 20 by gripping and rotating the input knob 354b in direction 355b to bias the back assembly 20 from the tilt position D toward the upright position C. The cam 418 is fixed to rotate together with the input knob 354b via the input shaft 356b. Rotation of the cam 418 causes the first cam wall 430 and the second cam wall 432 to contact the ends 412, 414 of the first spring 404 and the second spring 406, thereby deflecting the springs 404, 406 and increasing the bias force applied to the back assembly 20 at the selected tilt position. It should be noted that the radial offset positions of the first cam wall 430 and the second cam wall 432 relative to each other cause the first cam wall 430 to engage the second end 412 of the first spring 404 first, and then the second cam wall 432 to engage the second end 414 of the second spring 406, such that the auxiliary force applied to the back assembly 20 increases with the increase of the tilt angle. This embodiment allows the operator to determine at what point the auxiliary biasing force applied by the auxiliary biasing device 426b is applied to the back assembly 20 during the tilting process from the upright position C to the tilted position D.

[0112] Control component 16 ( Figure 30 and Figure 31The system also includes a pneumatic height control adjustment assembly 450, configured to allow a user to adjust the overall height of the seat assembly 10 between a lowered position G and an elevated position H. In the illustrated embodiment, the height control adjustment assembly 450 includes a first link 452 fixed to rotate with a shaft 454, which pivots about a shaft member 210 and is fixed to rotate with an input rod 456. The first link 452 includes a first end 458 fixedly coupled to the shaft 454 and a U-shaped second end 460 having a downwardly arranged first surface 462. The height control actuator assembly 450 also includes a second link 464 pivotally coupled at the first end 466 to a pivot shaft 342 and an upwardly arranged second surface 468 extending along the length of a second end 470 of the second link 464. In the example shown, the second surface 468 includes an upwardly arranged convex first arcuate surface 472 positioned distally adjacent to the second end 470, and an upwardly arranged convex second arcuate surface 474 positioned between the first arcuate surface 472 and the first end 466 of the second link 464. The second link 464 also includes an actuator tab 476 positioned along its length.

[0113] During operation, the operator can adjust the overall height of the seat assembly 10 between the fully lowered position G and the fully raised position H via the height control adjustment assembly 450 and the actuation cylinder device 478. To influence actuation, the operator grasps the input lever 456 and rotates the actuator lever 456 in any of the directions 450, thereby pivoting the actuator lever 456, the shaft 454, and the first link 452. As the first link 452 rotates, the first surface 462 of the first link 452 is guided along either the first arcuate surface 472 or the second arcuate surface 474 according to the direction of rotation of the input lever 456. The first surface 462 of the first link 452 travels along a track along either of the arcuate surfaces 472 or 474, causing the second link 464 to pivot about the pivot axis 342 in the direction 482. This causes the actuator tab 476 of the second link 464 to press down the actuator button 484 of the cylinder device 478, thereby actuating the cylinder device 478. By removing the downward force applied to the seat device 10, the cylinder device 478 is allowed to raise the height of the seat device 10, allowing the operator to adjust the height of the seat device 10 from a lower position to a higher position, or by applying a downward force to the seat device 10, thereby overcoming the force applied to the seat device 10 by the cylinder device 478 and lowering the overall height of the seat device 10. Once the desired height of the seat device 10 has been reached, the operator releases the input lever 456, thereby allowing the coil spring 486 to bias the actuator tab 476 away from the button 484 by rotating the second link 464 in the direction opposite to the direction 482. In the example shown, the conical helical spring 486 is located at and aligned with the end of the cylinder assembly 478. It should be noted that the first arcuate surface 472 and the second arcuate surface 474 are shaped such that the input force required by the operator to actuate the cylinder assembly 478 on the input rod 456 is substantially the same regardless of the direction of rotation of the input rod 456.

[0114] Each arm assembly 22 ( Figure 1 and Figure 32Each of the components includes a column member 490, a control assembly 492 housed within the column member 490, and an arm support assembly 494 supported on an end of the column member 490. Each column 490 includes a first portion 496 telescopically housed within a bushing member 497 positioned within a receiver portion 498 of the back frame member 102, such that the arm assembly 22 is substantially vertically adjustable relative to the back frame member between a raised position and a lowered position. The column member 490 also includes a second portion 500 extending forward from the first portion 496, such that at a corner 501 located between the first portion 496 and the second portion 500, the second portion forms an angle of at least 45° with the first portion, and preferably at least 75° with the first portion. The arm support 494 is operatively coupled to the second portion 500 of the column member 490, such that the arm support 494 ( Figure 33 It can be adjusted laterally between the inner position I and the outer position J, longitudinally between the rear position K and the front position L, and rotatably between the forward-facing position M, the outward rotation position, and the inward rotation position O.

[0115] like Figure 32 As best shown, the arm assembly 22 can also be provided as a conversion kit with or independently of a pair of plug members 551, wherein the arm assembly 22 can be replaced with the plug members 551 to convert the seat assembly 10 from an armed type to an armless type, and vice versa. Each plug member 551 includes a post portion 553 and an end wall 555. The post portion 553 is constructed similarly to the post portion 490 of the armrest 22 and is adapted to be received within the receiver portion 498 of the backrest frame 102. The end wall 555 seals the end of the post portion 553, thereby providing a seamless appearance and preventing access to the interior of the receiver portion 498. In some embodiments, the plug member 551 may be configured to include accessory components or supports, including but not limited to bag hooks, cup holders, tablet, mobile phone or other device holders, or other personal accessories.

[0116] Control component 492 ( Figure 34 The control assembly 492 includes a first link 502 having a first end 504 and a second end 508, the first end 504 being pivotally coupled to a support plate 506 of the arm support 492. The first link also includes an actuator portion 510 positioned along the length of the first link 502 between the first end 504 and the second end 508. The control assembly 492 also includes a second link 512 having a first end 514 and a second end 516, the first end 514 being pivotally coupled to the second end 508 of the first link 502. The second end 516 includes a biasing spring 518 that biases a plurality of locking teeth 520 of the locking member 522 toward a plurality of receiving teeth. Figure 35The plurality of receiving teeth are integrally molded with the back frame member 102 within the receiver 498 for locking engagement. In this embodiment, the pivot connection between the first link 502 and the second link 512 is preferably located at the corner 501 closest to the first portion 496 and the second portion 500, and the actuator portion 510 extends through a hole in the bottom of the second portion 500 of the pillar member 490, such that the actuator portion 510 can be approached along the length of the second portion 500 between the corner 501 and the distal end 526 of the pillar member 490.

[0117] Figure 22c ( Figure 36 This generally indicates an alternative embodiment of the arm assembly. Since arm assembly 22c is similar to the previously described arm assembly 22, therefore... Figures 32 to 34 and Figures 36 to 38 Correspondingly similar components are indicated by the same corresponding reference numerals, except that the latter includes the suffix "c". In the illustrated embodiment, the actuator portion 510c is pivotally housed within the end cap 528. Control component 492c ( Figure 37 The device includes an actuator portion 510c, a locking portion 530, and a flexible connector portion 532. The actuator portion 510c, locking portion 530, and connector portion 532 are preferably constructed as a single, integrated unit, comprising the entire actuator portion 510c and the entire locking portion 530, including a plurality of locking teeth 520c. In operation, the operator grasps the handle portion 534 of the actuator portion 510c, moves the handle portion 534 in direction 536, and moves the arm portion 538 in direction 540, thereby bending the distal end of the connector portion 532 downward and pulling the connector portion 532 in direction 542, disengaging the plurality of locking teeth 520c from the plurality of receiving teeth 524 of the receiver portion 498 of the back frame member 102.

[0118] like Figure 32 As best shown, the arm support assembly 494 may include a plastic arm cover housing member 660, an arm cover foam member 662, and an arm cover covering device 664, the arm cover covering device 664 including an outer layer 666, comprising thermoplastic polyolefin (TPO) and / or thermoplastic elastomer (TPE), molded onto a connecting ring 668. During assembly, the foam member 662 is positioned within the arm cover covering device 664. The housing member 660 is then positioned within the covering device 664 and snap-fitted or connected to the connecting ring 668 via mechanical fasteners (not shown). The arm support assembly 494 is then connected to a second portion 500 of the pillar arm 490 via mechanical fasteners extending through the second portion and into the housing member 660.

[0119] In another alternative embodiment, the seat assembly 10 ( Figure 38The device may be equipped with a headrest assembly 550 and / or a clothes hanger 552. In the example shown, the headrest assembly 550 ( Figure 40 The device includes a mounting structure 554 and a headrest member 556. The mounting structure 554 includes a mounting portion 558 and an upwardly extending support frame 562. The mounting portion 558 has an upwardly opening U-shaped cross-sectional configuration, its overall configuration similar to the upper portion of the back frame member 102. The headrest member 556 is vertically adjustable and mounted to the upwardly extending support frame 562. Alternatively, the mounting structure 554 for the headrest member 556 can be replaced by a hanger 552, and / or both the mounting structure 554 and the hanger 562 can be combined onto a single mounting portion 558. Figure 41 As best shown, the upper back shell portion 126 of the back shell member 104 is secured to the upper frame portion 110 of the back frame member 102 via a pair of mounting clips 564 positioned between the upper shell portion 126 and the upper frame portion 110, and includes a forward-extending hook 566 extending into a aperture 568 of the back shell member 104, and a pair of rearward-extending hooks 570 extending into an aperture 572 of the back shell member 104. A plurality of mounting screws 574 extend through the apertures 576 of the back frame member 102 and are received by the mounting clips 564, thereby securing the upper shell portion 126 of the back shell member 104 to the upper frame portion 110 of the back frame member 102. Alternatively, screw 574 can be replaced by a relatively longer screw 578, which can extend through the mounting portion 558 of the headrest assembly 550 and the upper frame portion 110 of the back frame member 102 and enter the mounting clip 564, thereby securing the headrest assembly 550 and the back housing member 104 to the back frame member 102. Figure 9A As best shown, each mounting clip 564 includes a body portion 565 that receives the associated screws 574 / 578 in a threaded connection, and a corresponding aperture 569 that engages the back housing member 104 in a snap-fit ​​manner. Figure 9 The forward-extending engagement portion 567 of the mounting clips 564 are each configured such that the front surface 571 of the engagement portion 567 is substantially flush with the forward-facing surface 573 of the back housing member 104, thereby completely filling the gap 569 and providing a flush surface that mates with the back housing member 104.

Claims

1. A seating device, the seating device comprising: A seat assembly configured to support a user seated thereon; Control component, the control component supporting the seat assembly; A back assembly adapted to be coupled to the control assembly and extending upward from the seat assembly; as well as Quick-connect device for connecting the back assembly to the control assembly, the quick-connect device comprising: A first recess and a first shaft assembly, wherein one of the back assembly and the control assembly includes the first recess, and the other of the back assembly and the control assembly includes the first shaft assembly received within the first recess; A second recess and a second shaft assembly, wherein one of the back assembly and the control assembly includes the second recess, and the other of the back assembly and the control assembly includes a second shaft assembly received within the second recess; and A locking device includes a main locking member movable relative to a second recess and a second shaft assembly, such that the main locking member pivots between a locked position and an unlocked position, wherein in the locked position the main locking member abuts against the second shaft assembly, thereby preventing the second shaft assembly from being removed from the second recess, and in the unlocked position the second shaft assembly is removable from the second recess, thereby allowing the back assembly to be disconnected from the control assembly.

2. The seating device according to claim 1, wherein the main locking member pivots about a pivot point offset from the longitudinal axis of the first axis device and the longitudinal axis of the second axis device.

3. The seating device of claim 1, wherein the main locking member is biased from the unlocked position toward the locked position by an offset member.

4. The seating device according to claim 3, wherein the biasing member comprises a leaf spring.

5. The seating device of claim 1, wherein the first recess includes a laterally extending channel.

6. The seating device of claim 1, wherein the second recess includes a laterally extending channel.

7. The seating device of claim 1, wherein the control component includes the first shaft assembly, and the backrest assembly includes the first recess.

8. The seating device of claim 1, wherein the control component includes the second shaft assembly, and the backrest assembly includes the second recess.

9. The seating device of claim 1, wherein the quick-connect device further comprises a secondary locking member operably coupled to the primary locking member and configured to prevent the primary locking member from moving from the locked position to the unlocked position.

10. A method for assembling a seating device, the method comprising: A seat assembly is provided, the seat assembly being configured to support a user seated thereon; A control component is provided, the control component supporting the seat assembly; A back assembly is provided, the back assembly being adapted to be coupled to the control assembly and extending upward from the seat assembly; as well as Connecting the back assembly via a quick-connect device includes: A first recess and a first shaft assembly are provided, wherein one of the back assembly and the control assembly includes the first recess, and the other of the back assembly and the control assembly includes the first shaft assembly received within the first recess; A second recess and a second shaft assembly are provided, wherein one of the back assembly and the control assembly includes the second recess, and the other of the back assembly and the control assembly includes the second shaft assembly received within the second recess; A locking device is provided, the locking device including a main locking member movable relative to the second recess and the shaft assembly, such that the main locking member pivots between a locked position and an unlocked position, wherein in the locked position the main locking member abuts against the second shaft assembly, thereby preventing the second shaft assembly from being removed from the second recess, and in the unlocked position the second shaft assembly is removable from the second recess, thereby allowing the back assembly to be disconnected from the control assembly; Position the first shaft assembly within the first recess; Rotate the back assembly relative to the control assembly until the second shaft device is positioned within the second recess; and pivot the main locking member from the unlocked position to the locked position, thereby preventing the second shaft device from being removed from the second recess.

11. The method of claim 10, wherein pivoting the main locking member comprises pivoting the main locking member about a pivot point offset from the longitudinal axis of the first shaft assembly and the longitudinal axis of the second shaft assembly.

12. The method of claim 10, wherein the main locking member is biased from the unlocked position toward the locked position by a biasing member.

13. The method of claim 12, wherein the biasing member comprises a leaf spring.

14. The method of claim 10, wherein the first notch comprises a laterally extending channel.

15. The method of claim 10, wherein the second notch comprises a laterally extending channel.

16. The method of claim 10, wherein the control component includes the first shaft assembly, and the back assembly includes the first recess.

17. The method of claim 10, wherein the control component includes the second shaft assembly, and the back assembly includes the second recess.

18. A seating device, the seating device comprising: A seat assembly configured to support a user seated thereon; Control component, the control component supporting the seat assembly; A back assembly, which is connected to the control assembly and extends upward from the seat assembly; as well as Quick-connect device, the quick-connect device comprising: A notch and a shaft assembly, wherein one of the back assembly and the control assembly includes the notch, and the other of the back assembly and the control assembly includes the shaft assembly received within the notch; as well as A locking device includes a primary locking member movable relative to the notch and the shaft between a locked position and an unlocked position. In the locked position, the primary locking member abuts against the shaft assembly, thereby preventing the shaft assembly from being removed from the notch. In the unlocked position, the shaft assembly is removable from the notch, thereby allowing the back assembly to be disconnected from the control assembly. The locking device also includes a secondary locking member operably coupled to the primary locking member and configured to prevent the primary locking member from moving from the locked position to the unlocked position.

19. The seating device of claim 18, wherein the secondary locking member is pivotally coupled to the primary locking member.

20. The seating device of claim 18, wherein the secondary locking member is movable between a first position and a second position, wherein in the first position the secondary locking member prevents the primary locking member from moving from the locked position to the unlocked position, and in the second position the primary locking member is movable from the locked position to the unlocked position, thereby allowing the shaft assembly to be removed from the recess.

21. The seating device of claim 18, wherein the secondary locking member is biased from its second position toward its first position.

22. The seating device of claim 18, wherein the secondary locking member is configured to abut against the shaft device as the shaft device moves from a position outside the recess to a position inside the recess.

23. The seating device of claim 18, wherein the main locking member is pivotable between its locked position and its unlocked position.

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