Patent Publication Number: US-11653764-B2

Title: Foldable multifunction chair

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority under 35USC§ 119(e) of U.S. provisional patent application No. 62/840,790 filed on Apr. 30, 2019, the specification of which is hereby incorporated by reference. 
    
    
     BACKGROUND 
     (A) Field 
     The present invention relates generally to chairs and, more particularly to a foldable multifunction chair that can adopt a diversity of configurations suitable for rest, leisure, and desk work, as well as capable of adopting a substantially compact folded format for ease of transport and shipping through parcel mail. 
     (b) Related Prior Art 
     Foldable chairs and, more particularly legless foldable chairs consisting essentially of an adjustable backrest that is configured to rest directly on the floor or ground, are known. This type of light and compact foldable chair is often convenient to carry around and use on the beach, camp ground, home, school and in gymnasium during particular exercises. 
     In some instances, such backrest type foldable chair generally comprises a base, a backrest adjustable at a user selected angle relative to the base, and a cushioned mat laid over the front of the backrest and extends along the ground for greater comfort. 
     While these known foldable chairs of the prior art can generally fulfill the main objective of providing an adjustable backrest that can be easily carried around, they are also relatively limited in terms of varied comfortable postures that a user can take advantage of. 
     Furthermore, these known foldable chairs of the prior art are also relatively limited in terms functionality or usage possible that can be achieved by a user. For example, they generally cannot provide an office desk like posture and configuration for a user who desires to do desk work or similar tasks in a typically seated posture for ease of controlling a mouse and keyboard. 
     U.S. Pat. No. 9,578,972B2 describes in a broad sense a chair with an arm ( 98 ) supporting a tablet that is adjustable to its attachment point ( 100 ) on the side of the backrest, as well as to the attachment point ( 102 ) with the tablet. There is no specified limit angle for the attachment points ( 100  and  102 ), and the arm ( 98 ) is not telescopic. Moreover, the chair itself has nothing in common with the chair of the present invention. 
     U.S. Pat. No. 6,092,868A discloses a chair with a telescopic arm ( 25 ) that swivel at a pivot point ( 27 ) on the side of the back as well as with the tablet. There is no specified limit angle around the swivel points. The chair itself shares nothing in common the chair of the present invention. 
     U.S. Pat. No. 3,266,061A, US20080246313A1 and U.S. Pat. No. 5,466,039A describe lounge chairs with adjustable elbow supports connected from each sides of their portion of the headrest, thus allowing a person to lie on his stomach, for example, to read. However, these elbow supports are not fully folded down to conceal them in the back surface of the back, as for the chair of the present invention. The structure of the chairs themselves have nothing in common with the chair of the present invention. 
     U.S. Pat. No. 8,371,653 describes a leisure chair with armrests that enable a user to sit very close to floor level with side base front supports that extend forwards further than the backrest connection means. However, this chair is not configurable for transportation and does not have wheels and a securing means for securing any of the cushioned portions thereof, such as the backrest, cushioned seat, and ottoman portions, to the chair so that the cushioned portions are compactly folded for transportation. The French Patent No. FR2700452B1 describes a tethering system that allows various angle configurations between cushioned segments to form a seat at a right-angle or a “Z” seat. However, these fasteners are flexible, while the ones of the present invention differ significantly in that they require to be rigid when the backrest is at a sharp angle for the chair of the present invention. 
     Thus, there is a need on the market for an improved foldable chair of the backrest type that avoids the aforementioned disadvantages. 
     In a broad aspect, the present invention provides such an improved foldable chair. 
     SUMMARY 
     According to an embodiment, there is provided a foldable multifunction chair, comprising:
         a base for contacting a support surface;   a user body support having a support front surface for contacting a user body, the user body support being adjustably pivotably mounted to the base along a transversal axis;   a selectively adjustable chair deployment mechanism cooperatively coupled to the base and the user body support, the chair deployment mechanism being configured for selectively adjusting the user body support to a desired angle relative to the base; and   a locking mechanism configured for angularly locking the user body support to the desired angle relative to the base.       

     According to another embodiment, the chair deployment mechanism comprises at least one longitudinal rail and a support structure, the longitudinal rail extending between a base forward end and a base rearward end of the base, the support structure having a first support end and a second support end, the first support end being pivotally mounted to a support rear surface of the user body support, the second support end being slidably mounted along the longitudinal rail, and wherein slidably moving the second support end along the longitudinal rail selectively adjusts the user body support to a desired angle relative to the base. 
     According to another embodiment, the selectively adjustable chair deployment mechanism further comprises a biasing element configured for biasing the second support end of the support structure substantially forwardly towards the base forward end of the base. 
     According to another embodiment, the locking mechanism comprises a actuable lock pin element and a pin biasing element, the actuable lock pin element and the pin biasing element being movably mounted to the second support end of the support structure, the pin biasing element being capable of biasing the actuable lock pin element towards a series of stop holes disposed along the longitudinal rail, and wherein biasing the actuable lock pin element toward a corresponding stop hole removably engages the actuable lock pin element with the corresponding stop hole to selectively lock in place the second support end of the support structure along the longitudinal rail. 
     According to another embodiment, the the locking mechanism comprises longitudinal slot and a rotatable locking element rotatably mounted transversally along the second support end of the support structure, the longitudinal slot extending between the base forward end and the base rearward end of the base, the rotatable locking element comprising a stem and at least one butterfly button affixed at a corresponding end of the stem, the rotatable locking element being freely movable along the longitudinal slot when the wings of the butterfly button are generally parallel relative to the longitudinal slot, the rotatable locking element being movably constrained along the longitudinal slot when the wings of the butterfly button are generally perpendicular relative to the longitudinal slot so that to removably engage corresponding recesses defined along the longitudinal slot and selectively lock in place the second support end of the support structure along the longitudinal slot. 
     According to another embodiment, the chair deployment mechanism comprises at least one length adjustable element having a first end portion and a second end portion, the first end portion being pivotally mounted to the support rear surface of the user body support, the second end portion being pivotally mounted to the base, and wherein varying the longitudinal length of the length adjustable element selectively adjusts the user body support to a desired angle relative to the base. 
     According to another embodiment, the locking mechanism is integrated in the length adjustable element and is selectively activated or deactivated via an element located at a user reachable location on the chair. 
     According to another embodiment, the selectively adjustable chair deployment mechanism comprises a motor means and a transmission means, the motor means being operatively coupled to the transmission means, the transmission means being operatively coupled to a pivot axis of the body support, and wherein activating the motor means selectively adjusts the user body support to a desired angle relative to the base. 
     According to another embodiment, the motor means comprises an electric motor and the transmission means comprises a worm gear transmission. 
     According to another embodiment, the foldable multifunction chair further comprises a collapsible seat pivotably connected to the base and user selectively movable between a collapsed and substantially flat positions. 
     According to another embodiment, the foldable multifunction chair further comprises a double-sided cushioned mat extension having a first proximal end and a second distal end, a securing means, the securing means being configured for securing the first proximal end to the second distal end of the double-sided cushioned mat extension. 
     According to another embodiment, the foldable multifunction chair further comprises an arm assembly coupled to a user accessory support, the arm assembly comprising a telescopically adjustable section and a selectively adjustable pivot joint for selectively positioning the user accessory support relative to the chair. 
     According to another embodiment, the foldable multifunction chair further comprises any one of an armrest, a retractable forearm support, a retractable retractable elbow, and a retractable neckrest and headrest. 
     According to another embodiment, the selectively adjustable chair deployment mechanism configures the chair in over ten distinctive positions. 
     According to an embodiment, there is provided a foldable multifunction chair, comprising:
         a base for contacting a support surface, the base having at least one longitudinal rail extending between a base forward end and a base rearward;   a user body support having a support front surface for contacting a user body, the user body support being adjustably pivotably mounted to the base along a transversal axis;   a selectively adjustable chair deployment mechanism cooperatively coupled to the base and the user body support, the chair deployment mechanism including:
           a support structure comprising at least one pivot leg, at least one slide leg, a motor means, and a transmission means, the pivot leg having a first pivot leg end pivotally mounted to the base and a second pivot leg end mounted to the body support, the slide leg having a first slide leg end slidably and pivotally mounted to the longitudinal rail and a second slide leg end pivotally mounted to the body support, the motor means being operatively coupled to the transmission means, the transmission means being operatively coupled to the first slide leg end, wherein activating the motor means longitudinally moves the first slide leg end along the longitudinal rail and selectively adjusts the distance between the user body support and the base;   a length adjustable element having a first element end and a second element end, the first element end being pivotally mounted to the support rear surface of the user body support, the second element end being pivotally mounted to the base, wherein varying the longitudinal length of the length adjustable element selectively adjusts the user body support to a desired angle relative to the base; and   a support structure locking mechanism configured for angularly locking the user body support to the desired angle relative to the base.   
               

     According to another embodiment, the motor means comprises an electric motor and the transmission means comprises a worm gear transmission. 
     According to another embodiment, the foldable multifunction chair further comprises a plurality of mounting holes disposed on each of the second slide leg end of the slide legs, each of the plurality of mounting holes being configured for selectively and removably mounting the second pivot leg end of a corresponding pivot leg so as the distance of the user support body relative to the base when the selectively adjustable chair deployment mechanism is in a deployed position is selectively adjustable. 
     The foldable multifunction chair may further comprise a support mat for covering the support front surface of the user body support front, a first seat mat segment, a second seat mat segment, and a mat securing means. The first seat mat segment may be selectively pivotally mounted to the user body support, the second seat mat segment may be selectively telescopically and selectively pivotally mounted to the first seat mat segment. The securing means may be configured for securing at least one of the support mat, the first seat mat segment, and the second sat mat segment with the other or to the chair. 
     According to another embodiment, the foldable multifunction chair further comprises an arm assembly coupled to a user accessory support, the arm assembly comprising a telescopically adjustable section and a selectively adjustable pivot joint for selectively positioning the user accessory support relative to the chair. 
     According to another embodiment, the foldable multifunction chair further comprises any one of an armrest, a retractable forearm support, a retractable retractable elbow, and a retractable neckrest and headrest. 
     According to another embodiment, the selectively adjustable chair deployment mechanism configures the chair in over ten distinctive positions. 
     According to an embodiment of the present invention, the multifunction chair comprises a base extending longitudinally on a support surface. 
     The multifunction chair further comprises a body support having a body support proximal end adjustably pivotably supported along a transversal axis by a forward end of the base, and a body support distal end extending radially therefrom. 
     The multifunction chair further comprises an arm assembly comprising an elongated telescopic arm having a telescopic arm proximal end adjustably pivotably mounted along a longitudinal side of the body support, and a telescopic arm distal end extending radially therefrom. 
     The multifunction chair further comprises a user accessory support adjustably pivotably mounted at the telescopic arm distal end. 
     The multifunction chair further comprises a collapsible seat having a lower portion thereof pivotably mounted at a rearward end of the base. 
     The body support is selectively pivotable between a chair folded position, wherein the body support is substantially parallel to the base, and a chair deployed position, wherein the body support is pivotally spaced apart from the base. 
     The arm assembly is capable of selectively adopting a position so as to have the accessory support located at a position substantially in close proximity with a rear surface of the body support, an adjacent position relative to the rear surface of the body support, an adjacent position relative to the body support distal end, and an adjacent position relative to a front surface of the body support. 
     The collapsible seat is selectively movable between a seat collapsed position, wherein the collapsible seat is capable of adopting a substantially flat configuration within, and substantially in register with, an imaginary horizontal plane of the base, and a seat deployed position, wherein the collapsible seat is deployed and resting on the support surface adjacently the rearward end of the base. 
     Thus, with the collapsible seat in the seat collapsed position, the arm assembly positioned so as to have the accessory support in close proximity with the rear surface of the body support, and the body support in the body support folded position, the multifunction chair forms a substantially compact format for ease of transport through parcel mail, or for a user to rest substantially horizontally with his or her rear upper body resting on the front surface of the body support. 
     Furthermore, with the collapsible seat in the seat collapsed position, the arm assembly positioned so as to have the accessory support adjacent the body support distal end, and the body support in the body support folded or slightly deployed position, a user may rest with his or her upper front body on the body support and use a support surface connected to the accessory support for leisure reading or work. 
     Furthermore, with the collapsible seat in the seat collapsed position, the body support in the body support deployed position, and the arm assembly positioned so as to have the accessory support adjacent the body support front surface, a user may be seated on the support surface and use the body support front surface as a backrest, and use a support surface connected to the accessory support for leisure reading or work in front of him or her. 
     Furthermore, with the collapsible seat in the seat collapsed position, the body support in the body support deployed position, and the arm assembly positioned so as to have the accessory support adjacent the body support rear surface, a user may stand up behind the accessory support and use a support surface connected to the accessory support to use the multifunction chair as a typical stand up workstation. 
     Still furthermore, with the body support in the body support deployed position, the collapsible seat in the seat deployed position, and the arm assembly positioned so as to have the accessory support adjacent the body support rear surface, a user may be seated on the collapsible seat and use a support surface connected to the accessory support to use the multifunction chair as a typical seated workstation. 
     Other positions of the accessory support relative to the body support are also possible. 
     These possible positions of the accessory support allow a user to conveniently position his or her accessory at a most convenient location for leisure activities or for desk work activities. 
     These possible positions of the accessory support further allow a user to conveniently position the accessory support at a most unobstructive position close to the body support rear surface, or conveniently positioned out of the way above the body support distal end. 
     The components of the various embodiments of the foldable multifunction chair described heretofore may be made of materials well known in the home and office furniture industry. Preferably, the materials used are substantially light weight, yet sufficiently rigid and robust as the chair inherently represents a movable furniture typically designed to support an adult. 
     Thus, there has been described heretofore various embodiments of a new and inventive assembly for a foldable multifunction chair that allows a user to adopt various comfortable postures for a restful rest, entertainment, or desk work. None of the known backrest type of comparable foldable chairs, such as legless foldable beach chairs and the like, can achieve so many possibilities in terms of comfortable user postures and functional utility of the chair. 
     Other advantages, novel features and alternate embodiments of the present invention will be more apparent from the following drawings and detailed description of selected embodiments, as illustrated in the accompanying figures. As will be realized, the subject matter disclosed and claimed is capable of modifications in various respects, all without departing from the scope of the claims. Accordingly, the drawings and the description are to be regarded as illustrative in nature, and not as restrictive and the full scope of the subject matter is set forth in the claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further features and advantages of the present disclosure will become apparent from the following detailed description, taken in combination with the appended drawings, in which: 
         FIG.  1   , in a side view, illustrates an embodiment of a foldable multifunction chair, according to the present invention, here shown in a folded position; 
         FIG.  2   , in a side view, illustrates the chair in  FIG.  1    in a slightly deployed position; 
         FIG.  3    illustrates the chair in a side view opposite the one shown in  FIG.  2   ; 
         FIG.  4   , in a front-end perspective view, illustrates the chair in  FIG.  2   ; 
         FIG.  5   , in a rear-end perspective view, illustrates the chair in  FIG.  2   ; 
         FIG.  6   , in a rear-end view, illustrates the chair in  FIG.  2   ; 
         FIG.  7   , in a side view, illustrates the chair in  FIG.  2   , here shown having a foldable padded mat in sequence views between a retracted and a deployed position; 
         FIG.  8   , in a rear-end perspective view, illustrates the chair in  FIG.  7   , here shown having a body support in a folded position, and the foldable padded mat in a fully deployed position; 
         FIG.  9   , in side perspective view, illustrates the chair, for example, in  FIG.  3   , here shown having a support arm assembly with accessory, and a forearm support, each in one possible state of a deployed position; 
         FIGS.  10  to  17   , in various perspective views, illustrate the chair in  FIG.  2    with its body support, foldable padded mat, support arm assembly with accessory, forearm support, and a retractable lamp, each in various possible states of deployment, position and usage; 
         FIG.  18   , in a rear-end perspective view, illustrate a foldable multifunction chair, according to the present invention, here having an embodiment of a selectively adjustable chair deployment mechanism in a deployed position including a support structure having length adjustable elements selectively releasable via a lever, as well as a collapsible seat in a collapsed position; 
         FIG.  19   , in a rear-end perspective view, illustrates the chair in  FIG.  2   , here having a collapsible seat in a deployed position; 
         FIGS.  20  and  21   , in front-end perspective views, illustrate the chair in  FIG.  2    having a retractable mat support and a protective carpet extension, each in a deployed position; 
         FIG.  22   , in a front-end perspective view, illustrates a foldable multifunction chair, according to the present invention, here having an embodiment of a selectively adjustable chair deployment mechanism including a motor drive unit, a worm gear transmission, and a remote-control unit, as well as a retractable base extension; 
         FIG.  23   , in a rear perspective view, illustrates a foldable multifunction chair, according to the present invention, here having an embodiment of a selectively adjustable deployment mechanism including a locking mechanism and a spring element; 
         FIG.  24   , in a partial perspective, enlarged view, illustrates a portion of the embodiment of a selectively adjustable deployment mechanism shown within section line XXIV in  FIG.  23   ; 
         FIG.  25   , in a side partial view, illustrates another embodiment of the locking mechanism; 
         FIG.  26   , in a partial front-end view, illustrates the other embodiment of the locking mechanism shown from section line XXV in  FIG.  25   ; 
         FIG.  27   , in a side view, illustrates the chair in  FIG.  1    having luggage wheels at one end thereof; 
         FIG.  28   , in an enlarged, perspective view, illustrates an embodiment of an accessory coupled at a distal end of the support arm assembly; 
         FIG.  29   , in an enlarged, cut away view, illustrates an embodiment of a selectively adjustable pivot joint; and 
         FIGS.  30  and  31   , in a front-end perspective and side views, illustrate the chair in  FIG.  2   , here shown including a selectively removable and adjustable headrest. 
         FIGS.  32  and  33   , in side views, illustrate a foldable multifunction chair, according to the present invention, shown in a raised and lowered positions, respectively, here having an embodiment of a selectively adjustable deployment mechanism including pivotable legs, slidable legs, motor drive unit, gear transmission, and biasing cylinders. 
         FIG.  34   , in a side view, illustrates the chair of  FIG.  33    in a folded position; 
         FIG.  35   , in a side perspective view, illustrates the selectively adjustable deployment mechanism including slidable legs of the chair of  FIG.  34   ; 
         FIG.  36   , in a side view, illustrates the chair of  FIG.  32    in a lying position; 
         FIGS.  37  to  40   , in various side views, illustrate the chair in  FIG.  32  or  33    each in various possible states of deployment, position and usage, here shown including a length-adjustable support arm assembly with accessory; 
         FIGS.  41  and  42   , in side perspective views, illustrate the selectively adjustable deployment mechanism of the chair of  FIG.  32    with or without slidable legs; 
         FIG.  43   , in a side perspective view, illustrates the chair of  FIG.  32    including a second mat segment in a retracted position; 
         FIGS.  44  and  45   , in rear-end perspective views, illustrates the chair of  FIG.  43    including a second mat segment in an extended and inclined position; 
         FIG.  46   , in rear-end perspective views, illustrates the chair of  FIG.  32    including elbows support in a deployed or folded position, and a collapsible seat in a deployed position; and 
         FIGS.  47  and  48   , in side perspective views, illustrate the chair of  FIG.  32    in various possible states of deployment, position and usage; 
         FIG.  49   , in a side perspective view, illustrates a foldable multifunction chair, according to the present invention, here having an embodiment of a plurality of mouting apertures to selectively adjust the distance between the body support and the base; 
         FIG.  50 A , in a side view, illustrates a foldable multifunction chair, according to the present invention, here having an embodiment of elongated members for pivotally and/or telescopically mounting cushioned mat segments to the body support; and 
         FIGS.  50 B and  50 C , in front-end perspective view and side view, respectively, illustrate the elongated members shown in  FIG.  50 A  in an deployed and retracted positions, respectively. 
     
    
    
     It will be noted that throughout the appended drawings, like features are identified by like reference numerals. 
     DETAILED DESCRIPTION 
       FIGS.  1  to  6   , inclusively, illustrate various aspects of an embodiment, according to the present invention, of a foldable multifunction chair  100 , hereinafter referenced more simply as the chair  100 . 
     The chair  100  comprises a base  102  extending longitudinally and substantially parallelly relative to a support surface. 
     The chair  100  further comprises a body support  104  having a body support proximal end  106 , a body support distal end  108 , a body support front surface  110 , a body support rear surface  112  and opposed body support longitudinal sides  114 . 
     The body support  104  is pivotably supported along a transversal axis through its body support proximal end  106  by a forward end  116  of the base  102 , with the body support distal end  108  extending radially therefrom. 
     The body support  104  is selectively pivotable between a chair folded position wherein the body support  104  is substantially parallel to the base  102 , as illustrated in  FIG.  1   , and a chair deployed position wherein the body support  104  is pivotally spaced apart from the base  102 , as illustrated in  FIGS.  2  to  6   ; 
     The chair  100  further comprises an arm assembly  118 . The arm assembly  118  includes an elongated telescopic arm  120  having a telescopic arm proximal end  122  and a telescopic arm distal end  124 . 
     The telescopic arm  120  is movable between a telescopic arm retracted position, as illustrated in  FIG.  5   , and a telescopic arm extended position, as illustrated in  FIG.  10   . 
     The arm assembly  118  further includes a first selectively adjustable pivot joint  126  at the telescopic arm proximal end  122 . The first selectively adjustable pivot joint  126  is connected along one of the body support longitudinal sides  114  or along the body support rear surface  112 . 
     Preferably, as illustrated throughout the figures, the first selectively adjustable pivot joint  126  is connected at an intermediate location along the body support longitudinal side  114  that is to the right of a user seated in the chair  100  illustrated, for example, in  FIG.  12   . 
     The arm assembly  118  further includes a second selectively adjustable pivot joint  128  at the telescopic arm distal end  124 . 
     The chair  100  further comprises a user accessory support  130  connected to the second selectively adjustable pivot joint  128  of the arm assembly  118 . The user accessory support  130  is configured for suitably supporting a user selected accessory such as, non limitatively, a writing surface, a computer device such as a laptop, a computer tablet, a computer tablet with a separate or detachable keyboard, a portable phone, a book, a food tray, a tool tray, or the likes. 
     Thus, with the body support  104  in the body support deployed or folded position, as possible, the arm assembly  118  is capable of user selectively adopting a position so as to have the accessory support  130  located adjacently the body support front surface  110 , as illustrated in  FIGS.  12  and  13   , the body support distal end  108 , as illustrated in  FIGS.  9 ,  11  and  14   , and the body support rear surface  112 , as illustrated in  FIGS.  17  and  19   . 
     The arm assembly  118  is further capable of user selectively adopting a position so as to have the accessory support  130  located in substantially close proximity with the body support rear surface  112 , as illustrated in  FIGS.  1 ,  5 ,  16  and  18    respectively. 
     Other positions of the accessory support  130  relative to the body support  104  are also possible. 
     These possible positions of the accessory support  130  allows a user to conveniently position his or her accessory at a most convenient location for leisure activities, such as suggested through  FIGS.  9 ,  10 ,  12 ,  13 ,  14  and  15   , or for work activities such as suggested in  FIGS.  17  and  19   . 
     These possible positions of the accessory support  130  further allow a user to conveniently position the accessory support  130  at a most non-obstructive position close to the body support rear surface  112 , as illustrated in  FIGS.  5 ,  8 ,  16  and  18   , or conveniently positioned out of the way above the body support distal end  108 , as illustrated in  FIG.  11   . 
     Furthermore, with the accessory support  130  positioned in proximity with the body support rear surface  112 , and the body support  104  in a folded position, as illustrated in  FIG.  1   , the chair  100  may adopt a substantially compact format for ease of transport, as illustrated in  FIG.  27   , as well as for economic shipping through parcel mail. 
     In some embodiments of the invention, the base  102  and body support  104  have substantially similar length and width dimensions. 
     Preferably, the base  102  and the body support  104  may both have a length and width dimensions that are between substantially similar to, and slightly greater than, the length and width dimensions of a conventionally sized backrest of an office chair, depending on the model size of the chair  100 , such as small, for young children, medium for teenager, and large for adults. 
     Further preferably, the body support  104  has its body support proximal end  106  pivotably supported substantially proximally at the forward end  116  of the base  102 , so as to act as a backrest when in a deployed position, as illustrated in  FIG.  11   . 
     Other relative proportions and dimensions of the base  102  and the body support  104  are also possible. 
     Further preferably, the body support  104  may include suitably configured armrests  132  along each body support longitudinal sides  114 . 
     Alternatively, the body support  104  may be free of any armrests, such as armerests  132  along each body support longitudinal sides  114 . 
     Preferably, the chair  100  further comprises a selectively adjustable chair deployment mechanism  134  cooperative with the base  102  and the body support  104 , for user selectively adjusting the body support  104  to a desired angle relative to the base  102 . 
     Referring to  FIGS.  23  and  24   , an embodiment of the chair deployment mechanism  134  includes a support structure  136  having a first end portion  138  pivotally supporting the body support  104  at an intermediate longitudinal location along the body support rear surface  112 , and a second end portion  140  slidably mounted along a pair of longitudinal rails  142  oppositely disposed parallelly longitudinally on each side of the base  102 . 
     The chair deployment mechanism  134  further includes a spring element  144 , such as an elongated compression coil spring, as illustrated in  FIG.  24   , or equivalent, configured for urging the second end portion  140  of the support structure  136  substantially forwardly relative to the base  102 . 
     The chair deployment mechanism  134  further includes a selectively locking mechanism  146 . The locking mechanism  146  includes at least one actuable lock pin element  148  movably mounted on the support structure  136  and adjacently a respective rail  142 . 
     The at least one lock pin element  148  is configured so as to be spring biased toward, and removably engageable with, a series of stop holes  150  distributed linearly parallelly along a longitudinal portion of the rail  142 . 
     The locking mechanism  146  further includes a lever  152  and cable  154  combination, wherein the lever  152  is operatively mounted at a user reachable location on the body support  104 , and the cable  154  operatively coupled between the lever  152  and the at least one lock pin element  146 . 
     Thus, the support structure  136 , the spring element  144 , the lock pin element  146 , and the lever  152  and cable  154  combination cooperate to allow a user having his or her back against the body support front surface  110  to actuate the lever  152  in order to selectively adjust the angle of the body support  104  relative to the base  102 . 
     As illustrated in  FIG.  23   , the lever  152  may be a U-shaped member having its distally opposed ends  156  pivotably mounted on laterally opposed location on each body support longitudinal side  114 , and extending transversally across the body support rear surface  112 . 
     Other known types and configurations of levers are also possible. 
     Referring to  FIGS.  25  and  26   , another embodiment of a selectively locking mechanism  146  is illustrated. In the presently described embodiment, the locking mechanism  146  includes a rotatable locking element  158 . The rotatable locking element  158  includes a pair of butterfly buttons  160  affixed at each end of a stem  162 . 
     The rotatable locking element  158  is rotatably mounted transversally along the support structure second end  140 , with each butterfly button  160  being user rotatably movable between a longitudinal orientation of its pair of wings, wherein the support structure second end  140  is freely slidably movable within a longitudinal slot  164  defined along each one in the pair of rails  142 , and perpendicular orientation relative thereof, wherein the wings of each butterfly button  160  are movably constrained within one of a plurality of oppositely facing recesses  166  defined in a longitudinally spaced apart relationship along the slot  164 . 
     Thus, by manually rotating the rotatable locking element  158 , the user may selectively adjust the angle of the body support  104  between the body support folded and deployed positions relative to the base  102  by incremental steps along the slots  164  on each sides of the base  102 . 
     Preferably, each oppositely facing recess  166  includes a spring biased element  168  for absorbing any abrupt movement of the support structure second end  140  within the slots  164  along the pair of rails  142 . 
     In some embodiments of the invention, as illustrated in  FIG.  18   , the support structure  136  is length adjustable through one or more length adjustable elements  170 , such as a pair of length selective telescopic cylinders including hydraulic and/or pneumatic cylinder, that are selectively releasable via a suitable lever  172  located at a user reachable location, for example, adjacent one of the body support longitudinal sides  114 . 
     Thus, a user may further fine adjust the angle of the body support  104  between the body support folded and deployed positions relative to the base  102 . 
       FIG.  22    illustrates another embodiment of a selectively adjustable chair deployment mechanism  134  cooperative with the base  102  and the body support  104 . The presently described chair deployment mechanism  134  includes a motor drive unit  174  including an electric motor mounted to the base  102  and operatively coupled to a worm gear transmission  176  which, in turn, is operatively coupled to a pivot axis of body support  104 . 
     Preferably, the motor drive unit  174  includes a rechargeable battery  178  or, alternatively, may be powered via a wall electrical outlet. 
     Further preferably, the motor drive unit  174  includes a wired or wireless remote-control unit  180  for controlling the latter. 
     Thus, a user may selectively adjust the angle of the body support  104  between the body support folded and deployed positions relative to the base  102 . 
       FIGS.  32  to  48    illustrate another embodiment of the chair deployment mechanism  400  which includes a pair of pivot legs  402   a ,  402   b , a pair of slide legs  404   a ,  404   b , at least one motor drive unit  406 , at least one worm gear transmission  408 , and a user control interface (not shown in the figure). 
     As illustrated in  FIGS.  32  and  33   , the pair of pivot legs  402   a ,  402   b  each have a first end portion  410   a  pivotally mounted proximal a rearward end  242  of the base  102 , and a second end portion  410   b  connected proximal to the body support proximal end  106  and a corresponding opposed body support longitudinal sides  114  of the body support  104 . 
     The pair of slide legs  404   a ,  404   b  each have a first end portion  412   a  slidably and pivotally mounted on a corresponding rail of the pair of longitudinal rails  142   a ,  142   b , and a second end portion  412   b  pivotally connected proximal to the body support proximal end  106  and a corresponding opposed body support longitudinal sides  114  of the body support  104 . 
     Each of the slide legs  404   a ,  404   b  may be selectively and pivotally mounted to a corresponding pivot legs  402   a ,  402   b  such that the distance between the body support  104  and the base  102  may be selectively adjusted when the chair deployment mechanism  400  is in a deployed position. To this end, each of the second end portion  412   b  of the slide legs  404   a ,  404   b  may comprise a plurality of mounting apertures, such as three mounting apertures, disposed longitudinally and spaced apart along a central axis portion thereof. Each of the second end portion  410   b  of the pivot legs  402   a ,  402   b  may be selectively removably mounted to a selected mounting aperture of a corresponding slide legs  404   a ,  404   b  by a mounting pin, such as a bolt pin and the like so as the pivot legs  402   a ,  402   b  pivot relative to the slide legs  404   a ,  404   b.    
     For example, pivotally mounting the pivot legs  402   a ,  402   b  to a mounting aperture that is located distal to the first end portion  412   a  of a corresponding slide legs  404   a ,  404   b  would position the body support  104  at a greater distance from the base  102 , as compared to pivotally mounting the pivot legs  402   a ,  402   b  to a mounting aperture that is located proximal to the first end portion  412   a  of the corresponding slide legs  404   a ,  404   b . To the contrary, pivotally mounting the pivot legs  402   a ,  402   b  to a mounting aperture that is located proximal to the first end portion  412   a  of a corresponding slide legs  404   a ,  404   b  would position the body support  104  at a smaller distance from the base  102 , as compared to pivotally mounting the pivot legs  402   a ,  402   b  to a mounting aperture that is located distal to the first end portion  412   a  of the corresponding slide legs  404   a ,  404   b.    
     Thus, a user may selectively adjust the distance between the body support  104  and the base  102  when via the chair deployment mechanism  400  and the plurality of mounting apertures. 
     Slidably moving the pair of slide legs  404   a ,  404   b  along the pair of longitudinal rails  142   a ,  142   b , from the forward end  116  towards the rearward end  242  the of the base  102  (as indicated by arrows in  FIGS.  32  and  33   ), pivotally moves the pair of pivot legs  402   a ,  402   b  and the pair of slide legs  404   a ,  404   b  so as to move the body support  104  from a raised position towards a lowered position. Slidably moving the pair of slide legs  404   a ,  404   b  in an opposite direction along the pair of longitudinal rails  142   a ,  142   b , from the rearward end  242  towards the forward end  116  of the base  102 , pivotally moves the pair of pivot legs  402   a ,  402   b  and the pair of slide legs  404   a ,  404   b  so as to move the body support  104  from a lowered position towards a raised position. In the lowered position, the body support  104  is generally held proximal to the base  102  and may either be positioned angularly relative to the base  102 , as illustrated in  FIG.  33   , or be positioned substantially parallelly relative to the base  102 , as illustrated in  FIGS.  34  and  35   . In the raised position, the body support  104  is generally held above to the base  102  and may either be positioned angularly relative to the base  102 , as illustrated in  FIGS.  32  and  36   , or be positioned substantially parallelly relative to the base  102 . 
     To move the pair of slide legs  404   a ,  404   b  along the pair of longitudinal rails  142   a ,  142   b , at least one motor drive unit  406  and at least one worm gear transmission  408  may be provided to the chair deployment mechanism  400  of the present embodiment. For example, a motor drive unit  406  may be provided on each longitudinal rails  142   a  and  142   b  and each operatively coupled to a corresponding worm gear transmission  408 . A worm gear transmission  408  may be provided on each longitudinal rails  142   a  and  142   b  and corresponding slide legs  404   a  and  404   b . Alternatively, a motor drive unit  406  may be provided on a single longitudinal rail  142   a  or  142   b , and a worm gear transmission  408  may be provided on a single longitudinal rail  142   a  or  142   b  and a corresponding slide leg  402   a  or  402   b . Also, the motor drive unit(s)  406  and worm gear transmission(s)  408  may be provided as an independent module to the chair deployment mechanism  400  of the present embodiment, for example for ease of manufacture and/or reparation. 
     Any other means known in the art that enables moving the pair of slide legs  404   a ,  404   b  along the pair of longitudinal rails  142   a ,  142   b  are also possible without departing from the scope of the invention. For example, the slide legs  404   a ,  404   b  may be slidably moved along the corresponding longitudinal rails  142   a ,  142   b  by at least one length adjustable elements (not illustrated in the figures), such as a pair of length selective telescopic cylinders including hydraulic and/or pneumatic cylinders, or even by slidably and pivotally moving the pivot legs  402   a ,  402   b  and the slide legs  404   a ,  404   b  manually and by providing a locking mechanism  146  as described herein with proper modification(s) already understood by the skilled person. For example, the locking mechanism  146 , best shown in  FIG.  41   , may be integrated in the length adjustable element  414   a  or  414   b , and be selectively activated or deactivated via an element located at a user reachable location on the chair. 
     Operation of the motor drive unit(s)  406  and worm gear transmission(s)  408  is performed by the user through the user control interface so as the user may selectively adjust the most convenient height above the ground or distance of the body support  104  relative to the base  102 . 
     The chair deployment mechanism  400  of the present embodiment further includes, as illustrated in  FIGS.  41  to  44   , a pair of length adjustable elements  414   a ,  414   b , such as a pair of length selective telescopic cylinders including hydraulic and/or pneumatic cylinders. Particularly,  FIGS.  41  and  42    illustrate the selectively adjustable chair deployment mechanism  400  in presence and absence of the length adjustable elements  414   a ,  414   b , respectively. For their parts,  FIGS.  43  and  44    illustrate the selectively adjustable chair deployment mechanism  400  with the length adjustable elements  414   a ,  414   b  connecting the body support rear surface  112  of the body support  104 . 
     The pair of length adjustable elements  414   a ,  414   b  each have a first end portion  416   a  pivotally mounted at an intermediate longitudinal location between the first end portion  410   a  and the second end portion  410   b  on a corresponding pivot leg  402   a ,  402   b . The pair of length adjustable elements  414   a ,  414   b  each also have a second end portion  416   b  pivotally supporting the body support  104  at an intermediate longitudinal location along the body support rear surface  112 , between the body support proximal end  106  and the body support distal end  108 . 
     Telescopically extending the pair of length adjustable elements  414   a ,  414   b  from a shorter configuration towards a longer configuration urges the body support  104  generally away from the base  102  so as the body support  104  pivots about the second end portion  410   b  of each of the pair of pivot legs  402   a ,  402   b  towards the forward end  116  of the base  102 . Telescopically extending the pair of length adjustable elements  414   a ,  414   b  in an opposite direction, from a longer configuration towards a shorter configuration, urges the body support  104  generally closer to the base  102  so as the body support  104  pivots about the second end portion  410   b  of each of the pair of pivot legs  402   a ,  402   b  towards the rearward end  242  of the base  102 . 
     In some embodiments of the invention, and illustrated in  FIGS.  50 A-C , the chair includes a seat having a first seat mat segment  216  and a second seat mat segment  218 . The first seat mt segment  16  is selectively pivotally mounted proximal to the body support proximal end  106  of the body support  104  by a pair of elongated members  418 . Each of the elongated member  418  is coupled to a corresponding opposed side of the first seat mat segment  216 , and is projecting from a corresponding side of the opposed body support longitudinal sides  114  of the body support  104 . Each of the elongated members  418  includes a pivot hole  420 , a projecting member  430  telescopically received thereinto, and a longitudinal slot  422  extending longitudinally therelaong. For selective pivotal movement of the first seat mat segment  216  relative to the body support  104 , each pivot hole of corresponding elongated members  418  is pivotally mounted by a pin, such as a bolt pin and the like, proximal to the body support proximal end  106  and corresponding side of the opposed body support longitudinal sides  114  of the body support  104 . 
     In some embodiments of the invention, as still illustrated in  FIGS.  50 A-C , the second seat mat segment  218  is selectively telescopically mounted to the first seat mat segment  216  by the projecting members, which are each coupled to a corresponding opposed side of the second seat mat segment  218 . As such, the projecting members may position the second seat mat segment  218  in a retracted position (as illustrated for example in  FIGS.  43  and  49    for the chair  100 , and in  FIG.  50 C  for an elongated member  418 ), wherein the second seat mat segment  218  is retracted and contained within the first seat mat segment  216 , and a deployed position, wherein the second seat mat segment  218  selectively telescopically projects away from the first seat mat segment  216  (as illustrated for example in  FIGS.  37  to  40 ,  44 ,  45 , and  50 A  for the chair  100 , and in  FIG.  50 B  for an elongated member  418 ). 
     Any other intermediate position between the retracted and deployed positions are also possible wherein the second seat mat segment  218  is partially retracted and contained within the first seat mat segment  216  or partially telescopically projected away from the first seat mat segment  216 . In either position, the longitudinal slot  422  selectively removably locks the second seat mat segment  218  relative to the first seat mat segment  216  via frictional engagement of a slidable pin, such as a bolt pin and the like, that is connected to a corresponding projecting member  430  of a elongated members  418  and projects through a corresponding longitudinal slot  422  of the elongated members  418 . Other mechanisms for selectively locking the second seat mat segment  218  relative to the first seat mat segment  216  are also possible without departing from the scope of the present invention. 
     In either a fully or a partially deployed position, the second seat mat segment  218  is further selectively pivotaly adjustable relative to the first seat mat segment  216  (as illustrated for example in  FIGS.  38 ,  40 ,  44 ,  45 , and  50 A  for the chair  100 ). For example, the second seat mat segment  218  may be angularly positionable relative to the first seat mat segment  216  by the frictional engagement of the slidable pin and/or by a pivot joint, such as the pivot joint  186  or any other pivot joint known in the art. 
     Therefore, in some embodiments of the invention, the second seat mat segment  218  is independently configurable in terms of length and angular position thereof relative to the first seat mat segment  216 . For example, the second seat mat segment  218  may be disposed contiguously with the second seat mat segment  218 , as illustrated in  FIG.  43   , In this last case, the first seat mat segment  216  and the second seat mat segment  218  may be secured together by any securing means known in the art, such as a zipper mechanism. The second seat mat segment  218  may also be disposed apart and angularly relative to the substantially rigid core of the first seat mat segment  216 , as illustrated in  FIG.  44   . 
     Other known equivalent configurations and mechanisms for pivotally mounting the first seat mat segment  216  to the body support  104  and for pivotably and/or telescopically mounting the second seat mat segment  218  to the first seat mat segment  216  are also possible. 
     In some embodiment of the present invention, the selectively adjustable chair deployment mechanism  400  enables the chair  100  to adopt various configurations. For example, the chair  100  may be in a raised position and have the body support  104 , the first seat mat segment  216 , and the second seat mat segment  218  parallel to the base  102 , as illustrated in  FIG.  37   . 
     The chair  100  may be in a so-called “zero-gravity position”, and be in a raised position and have the body support distal end  108  generally above the body support proximal end  106  of the body support  104  generally, while the first seat mat segment  216  is generally perpendicularly to the body support  104  and the second seat mat segment  218  is generally parallelly to the base, as illustrated in  FIG.  38   . 
     The chair  100  may be in a so-called “Tredelenburg position”, and be in a raised position and have the body support distal end  108  generally below the body support proximal end  106  of the body support  104  generally, while the first seat mat segment  216  is generally perpendicularly to the body support  104  and the second seat mat segment  218  is generally parallelly to the base, as illustrated in  FIG.  38   . 
     The chair  100  may also be in a lowered position and have the body support  104 , the first seat mat segment  216 , and the second seat mat segment  218  generally parallelly to the base  102 . 
     The chair  100  may also be in a raised position for a user to sit or lie on the body support  104  for performing various task, as illustrated in  FIGS.  47  and  48   . 
     Other known configurations and position of the chair  100  are possible with the selectively adjustable chair deployment mechanism  400 . 
     In some embodiments, such as illustrated in  FIGS.  45  and  46   , the chair  100  includes a pair of retractable elbow supports  426   a ,  426   b  mounted on the body support rear surface  112  and proximal the body support distal end  108  of the body support  104 . The elbow supports  426   a ,  426   b  are foldable between a folded position and a deployed position. In the folded position, the elbow supports  426   a ,  426   b  are disposed generally parallelly to the body support  104  and may be concealed by the user accessory support  130  when the user accessory support  130  is located adjacently the body support rear surface  112  of the body support  104 , as illustrated in  FIG.  45   . In the deployed position, the elbow supports  426   a ,  426   b  are each located on corresponding opposed body support longitudinal sides  114  and proximal the body support distal end  108  of the body support  104 . In use, the elbow supports  426   a ,  426   b  serve to provide support to elbows of the user when, for example, the user is lying on the body support  104 , e.g. as illustrated in  FIG.  48   . 
     Referring, for example, to  FIGS.  10  and  15   , in some embodiments of the invention, the first and second selectively adjustable pivot joints  126  and  128  are selectively rotatably adjustable about a transversal axis  182  and  184  respectively, relative to the chair  100 . 
     Referring to  FIG.  29   , an embodiment of a selectively adjustable pivot joint  186  rotatable about an axis includes a lever  188  that allows to user selectively engage a spring biased first wheel  190  having a laterally extending ring of teeth  194  with a second wheel  196  having a compatibly disposed ring of laterally extending bores  198 . Other equivalent pivot joints rotatable about an axis that are well known in the art are also possible. 
     Furthermore, as best illustrated in  FIG.  15   , in some embodiments of the invention, at least the first selectively adjustable pivot joint  126  is further telescopically adjustable laterally relative along the longitudinal axis  182  relative to the chair  100 . This lateral telescopic adjustment allows to retract laterally inwardly the arm assembly  118  relative to the chair  100  so as to attain relatively more compact format of the overall dimensions of the chair  100 , as illustrated in  FIGS.  2  and  5   . 
     Furthermore, in some embodiments of the invention, at least the first, but preferably both the first and second selectively adjustable pivot joints  126  and  128  are further angularly laterally pivotable relative to imaginary longitudinal axis  200  and  202  of the chair  100 . 
     As exemplified in  FIG.  28   , the first and second selectively adjustable pivot joints  126  and  128  may include a selectively adjustable universal ball type joint  204  to achieve universal movement and user selected angle setting of the joint. This type of selectively adjustable universal ball joint  204  provided with a setting handle  206  is well known in the art such as photography stands, camping equipment and the likes. 
     Still referring to  FIG.  28   , preferably, at least the second selectively adjustable pivot joint  128  has a selectively detachable coupling  208  interfacing with a compatible coupling provided along a suitable portion of the accessory support  130 . Thus, with the accessory support  130  holding, for example, an electronic tablet device or the like may be detached from the chair  100  and conveniently brought elsewhere around the house. 
     Preferably, as best illustrated in  FIGS.  4 ,  7  and  8   , the body support  104  includes a substantially rigid rear portion along the body support rear surface  112 , and a cushioned front portion for comfort of the user along the body support front surface  110 . Thus, when in an almost fully deployed position, the chair  100  may be used as a legless backrest type foldable chair resting directly on a support surface such as a floor, as illustrated in  FIGS.  11  and  16   . Alternatively, when in an intermediate deployed position, as illustrated in  FIGS.  2 ,  9 ,  14  and  15   , the chair  100  may allow a user to rest on his or her front to read a book or the like. 
     Furthermore, the body support  104  further includes a foldable double-sided cushioned mat extension  212 , as illustrated for example on  FIGS.  7  and  8   , having a longitudinal proximal end pivotably attached transversally along the body support proximal end  106 . When in a retracted position, the mat extension  212  is configured and sized to uniformly nest in a shallow depression  214  defined along a longitudinal portion of the front surface of the cushioned front portion of the body support  104 . 
     And when in a deployed position, the mat extension  212  may be used as a cushioned seat element, as illustrated in  FIG.  11   , or alternatively, in cooperation with the cushioned front portion of the body support  104 , as a full-length sleeping mattress, as illustrated in  FIG.  8   . 
     Further preferably, as illustrated in  FIGS.  7  and  11   , the mat extension  212  is foldable about at the middle in a first and second mat segment  216  and  218  for use a double cushioned seat element. 
     In some embodiments, any one of the chair  100 , the first seat mat segment  216 , the second seat mat segment  218 , and the double-sided cushioned mat extension  212  may include a mat securing means, such as a zipper, a velcro, a snap-fit button and the like, that is configured to secure together at least two of the chair  100 , first seat mat segment  216 , the second seat mat segment  218 , and the double-sided cushioned mat extension  212 . The mat securing means allows any one of the first seat mat segment  216 , the second seat mat segment  218 , and the double-sided cushioned mat extension  212  to be secured together and/or to the chair  100 . In such a secured arrangement, the first seat mat segment  216 , the second seat mat segment  218 , and the double-sided cushioned mat extension  212  cannot be easily removed from the chair  100 , which is convenient, e.g., when transporting the chair as the first seat mat segment  216 , the second seat mat segment  218 , and the double-sided cushioned mat extension  212  may not fall from the chair  100  and generally have a compact configuration. 
     Referring to  FIGS.  20  and  21   , further preferably, first seat mat segment  216  closest to the body support  104  includes a substantially rigid core, and a retractable mat support  220  longitudinally retractable in a longitudinal slot  222  defined along the forward transversal end thereof. 
     The retractable mat support  220  is longitudinally movable between a mat support retracted position wherein it is concealed through longitudinal slot  222  and within the first seat mat segment  216 , and a mat support extended position wherein it is longitudinally extended forwardly outside the first seat mat segment  216 . 
     Furthermore, the first seat mat segment  216 , in cooperation with a pair of removably attachable links  224  on each sides with the body support  104 , and the retractable mat support  220  in the mat support extended position, may serve to support the second seat mat segment  218 , so as to maintain a substantially S-shaped long chair configuration, as illustrated in  FIG.  21   . 
     As exemplified in the figures, the retractable mat support  220  may include semi-rigid and parallelly longitudinally extending pair of resilient stem members  228  joined by a flexible sheet  230  of material. The stem members  228  being freely telescopically engaged in tubular members  232  embedded in the first seat mat segment  216 . 
     Other known equivalent configurations and materials for the retractable mat support  220  are also possible. 
     Alternatively to the retractable mat support  220 , the second seat mat segment  218  may also include a substantially rigid core which, in cooperation with an additional pair of removably attachable links  224  on each sides with the first seat mat segment  216 , may as well serve to maintain the S-shaped long chair configuration, as illustrated in  FIG.  10   . 
     In some embodiments of the invention, as illustrated in  FIGS.  18  and  19   , the chair  100  may further include a collapsible seat  240 . The collapsible seat  240  is pivotably connected to a rearward end  242  of the base  102  and is user selectively movable between a collapsed and substantially flat position that is substantially coplanar with a rearward top portion of the base  102 , and a pivoted out and deployed position adjacent the rearward end  242  of the base  102 . 
     The collapsible seat  240  is suitably sized and dimension, in cooperation with the configuration of the base  102 , to allow the body support  104  to adopt its folded position, as illustrated in  FIG.  1    when the collapsible seat  240  is in the collapsed position. 
     As exemplified in the figures, the collapsible seat  240  may be any known collapsible or foldable seat that can adopt a relatively flat configuration when in a collapsed position, combined with a pair of pivot arms  244 , or equivalent, pivotably linking a leg portions of the collapsible seat  240  with the rearward end  242  of the base  102 . 
     In some embodiments of the invention, as illustrated in  FIGS.  9 ,  10 ,  14  and  15   , the chair  100  may further include a pair of retractable forearm supports  250  each attached adjacent a respective longitudinal side of a distal end portion of the body support rear surface  112  preferably, as illustrated, or alternatively along a respective body support longitudinal side  114 . 
     For example, each pair of retractable forearm supports  250  may include a retractable arm element  252  having one end attached to the chair  100  and the opposed end pivotably supporting an elongated padded support element  254 . 
     The pair of retractable forearm supports  250  is selectively movable between a forearm support retracted position wherein the padded support element  254  is located in proximity with a surface portion of the chair  100 , and a forearm support extended position wherein the padded support element  254  is spaced away from the surface portion of the chair  100 . 
     Other types and configuration for the pair of retractable forearm supports  250  are also possible. 
     In some embodiments of the invention, as illustrated, for example, in  FIGS.  5 ,  6  and  16   , the chair  100  may further include a retractable LED lamp  260 , or equivalent, concealed in a recess  262  extending longitudinally inwardly relative to the body support distal end  108 . 
     Preferably, the recess  262  is sufficiently wider than the retractable lamp  260  so as to stow away therein a user&#39;s headphone set  300  engaged in a saddle like fashion on a longitudinal base portion of the lamp  260 , as exemplified in  FIG.  6   . 
     It is to be noted that the body support  104  and other components of the presently described invention, may further include embedded or attached to portion(s) thereof, one or more convenient to have power sources and other known electronic devices often found in multimedia chairs. As non-limitative examples, the chair  100  may include USB chargers, common electrical outlets (110-220 VAC), multimedia player devices (music and/or video players), and the likes. 
     In some embodiments of the invention, as illustrated in  FIG.  22   , the chair  100  may further include a protective, flexible carpet  264  having one end attached to an underside portion of the base  102 , and at least partially longitudinally forwardly extend relative thereof, for protecting the support surface of the chair  100 . 
     In some embodiments of the invention, as illustrated in  FIG.  22   , the chair  100  may further include a retractable base extension  266 , for example, in the form of a U-shaped member  268  longitudinally slidably engaged through the forward end  116  of the base  102 . The retractable base extension  266  is selectively movable between a base extension retracted and extended position relative to the base  102 , so as to selectively provide a relatively greater longitudinal base support, such as when the body support  104  is raised at a substantially perpendicular angle relative to the base  102 . 
     Other known configurations of equivalents for a retractable base extension are also possible. 
     In some embodiments of the invention, the accessory support  130  may include embedded known accessories and devices such an additional lamp  269 , as illustrated in  FIG.  13   , an embedded electronic tablet  270  or a mirror with contour lamps  272 , as illustrated in  FIG.  28   , a pivotable kick stand  274  usable when the accessory support  130  is detached from the chair  100 , or that can serve as a transparent protective cover for an embedded tablet  270 . 
     The accessory support  130  may further include a retractable keyboard support (not shown in the figures) for supporting a wireless keyboard or electronic pen pad. 
     In some embodiments of the invention, as illustrated in  FIG.  27   , the chair  100  may further include two or more luggage wheels  280  or equivalent rotatably mounted at one longitudinal end of the chair  100 , so as to conveniently allow a rolled transport by manually grabbing the chair  100  by the opposite longitudinal end thereof. Thus, the chair  100  may be easily and conveniently moved around the house, the school, through airports during air travels, and the likes. 
     In some embodiments of the invention, as illustrated in  FIG.  30 - 31   , the chair  100  may further include a selectively removable and adjustable headset  290  connected substantially adjacent the body support distal end  108 . 
     The components of the various embodiments of the foldable multifunction chair  100  described heretofore may be made of materials well known in the home and office furniture industry. Preferably, the materials used are substantially light weight, yet sufficiently rigid and robust as the chair  100  inherently represents a movable furniture typically designed to support an adult. 
     Thus, there has been described heretofore various embodiments of a new and inventive assembly for a foldable multifunction chair  100  that allows a user to adopt various comfortable postures for a restful rest, entertainment, or desk work. None of the known backrest type of comparable foldable chairs, such as legless foldable beach chairs and the like, can achieve so many possibilities in terms of comfortable user postures and functional utility of the chair. 
     While preferred embodiments have been described above and illustrated in the accompanying drawings, it will be evident to those skilled in the art that modifications may be made without departing from this disclosure. Such modifications are considered as possible variants comprised in the scope of the disclosure.