before explaining the disclosed embodiments of the present invention in detail it is to be understood that the invention is not limited in its applications to the details of the particular arrangements shown since the invention is capable of other embodiments . also , the terminology used herein is for the purpose of description and not of limitation . in the summary above and in the detailed description of preferred embodiments and in the accompanying drawings , reference is made to particular features ( including method steps ) of the invention . it is to be understood that the disclosure of the invention in this specification includes all possible combinations of such particular features . for example , where a particular feature is disclosed in the context of a particular aspect or embodiment of the invention , that feature can also be used , to the extent possible , in combination with and / or in the context of other particular aspects and embodiments of the invention , and in the invention generally . in this section , some embodiments of the invention will be described more fully with reference to the accompanying drawings , in which preferred embodiments of the invention are shown . this invention may , however , be embodied in many different forms and should not be construed as limited to the embodiments set forth herein . rather , these embodiments are provided so that this disclosure will be thorough and complete , and will convey the scope of the invention to those skilled in the art . like numbers refer to like elements throughout , and prime notation is used to indicate similar elements in alternative embodiments . 130 rotating chin rest hinge allows chin rest to rotate about bottom tube . 170 chin rest foam cushion tube fits over chin rest . fig1 is a rear top perspective view of the novel headrest 10 in a deployed position . fig2 is a front bottom perspective view of the headrest 10 of fig1 . fig3 is a rear bottom perspective view of the headrest 10 of fig1 . fig4 is another view of the headrest of fig3 folded for storage . fig5 is a rear view of the headrest 10 of fig1 . fig6 is a left side view of the headrest 10 of fig1 . fig7 is a front view of the headrest 10 of fig1 . fig8 is a right side view of the headrest 10 of fig1 . fig9 is a top view of the headrest 10 of fig1 . fig1 is a bottom view of the headrest 10 of fig1 . referring to fig1 - 3 and 5 - 10 , the novel head rest 10 includes a hook base 20 attached to the upper end of a top tube 90 . a hook slide 30 with hook release button 40 can slide relative to a lock screw slot 60 in base 20 having lock detents 70 in the base 20 . the top tube 90 can telescopingly slide about a bottom tube 120 . an outwardly extending spring biased pin 110 in bottom tube 120 can pop in and out of through holes 100 in the top tube 90 that allow for different height adjustment of the top tube 90 relative to bottom tube 120 . a rotating chin rest hinge 130 held in place by bottom tube cap 150 allows for horizontally attached chin rest 160 to pivot horizontally relative to the lower end of the bottom tube 120 . a chin rest hinge pin 140 attached to the rest hinge 130 and the horizontal chin rest 160 , allows for the chin rest 160 to pivot up relative to the pivot pin 140 . a cushion sleeve 170 such as a foam sleeve can wrap about the chin rest 160 . fig1 is a rear view of the folded headrest 10 of fig4 . fig1 is a left side view of the folded headrest 10 of fig4 . fig1 is a front view of the folded headrest 10 of fig4 . fig1 is a right side view of the folded headrest 10 of fig4 . fig1 is a top view of the folded headrest 10 of fig4 . fig1 is a bottom view of the folded headrest 10 of fig4 . referring to fig4 and 11 - 16 , the novel headrest 10 can collapsed into a folded position with the hook slide 30 slid inwardly along lock screw slot 60 of the hook base . the top tube 90 can be slid down over bottom tube 120 to be substantially concentric and overlying with one another . the chin rest 160 can be pivoted about chin rest hinge pin 140 , and folded upward by hinge pin 140 , so that the chin rest 160 is parallel to overlying tubes 90 , 120 , and hook base 20 is parallel to rest hinge 130 . the folded headrest 10 can be sized in order to fit in a user &# 39 ; s pocket , a backpack , a briefcase , handbag , and the like . additionally , the headrest can be made from lightweight materials , and the like . fig1 is an exploded perspective view of the headrest 10 of the preceding figures . the detail of the hook lock screw 50 with release spring 80 which can overlay the threaded end of the screw 50 and a hook release button 40 . fig1 is an enlarged view of the hook base 20 and hook slide 30 of the headrest 10 of the preceding figures . fig1 a is a cross - sectional view of the hook base 20 and slide 30 of the headrest 10 of fig1 along arrows 19 x showing the release button 40 and lock screw / bolt 50 with the lock screw / bolt 50 nested under spring pressure by spring 80 into one of several detents 70 in the base 20 . in this view , the hook slide 30 ( clamp ) is locked in a fixed horizontal position . fig1 b is another cross - sectional view of the hook base 20 and hook slide 30 of fig1 along arrows 19 x with the release button 40 being pressed and the lock screw / bolt 50 released from the detent 70 in the base 20 . in this view , the hook slide 30 ( clamp ) is unlocked and is adjustable for different thickness widths of the back of the seat . fig2 is a partial cut - away detail of the clamp base 20 of the headrest showing the head of the lock screw / bolt 50 nested in the first base detent 70 . fig2 is another view of fig2 showing the head of the lock screw / bolt 50 pushed out of the detent 70 ( the release button 40 on the opposite of the view is being pressed ). the hook slide 30 can then be adjusted slide relative to the hook base 20 . fig2 is another view of fig2 showing the hook slide 30 adjusted and the lock screw / bolt 50 head nested in an alternate detent 70 . fig2 is a side view of the headrest 10 of the preceding figures with the hook slide 30 having an outer hook end clamped to a rear surface edges of the seat back 160 , with the top tube 90 on the front side of seat back 160 fig2 is a perspective view of the headrest 10 of the preceding figures showing chin rest 160 with cushion sleeve 170 being rotatable in a horizontal direction about the bottom vertical tube 190 for best location . fig2 is a perspective view of the headrest 10 of fig2 showing that the top tube 90 and bottom tube 120 telescoping with one another and locked to a different overall length by the outwardly spring biased pin 110 . fig2 is a perspective view of the headrest 10 of the preceding figures showing a person 190 resting their chin on the chin rest 160 with cushioned sleeve 170 of the installed and adjusted headrest 10 . the novel headrest 10 can be made from components , such as but not limited to metal , such as aluminum , galvanized metal , and the like , or plastic , or combinations thereof . another alternative version of the headrest is to have the clamp member , vertical member , and chin rest , to be formed from a pliable material . for example , another headrest can have a possible z shape formed from a one piece of pliable material , such as aluminum , with a cushion overlayer . the pliable under support can be bent into shape , so that the clamp portion can bend about the top of a backrest , and the chin rest bent into a desired configuration . the pliable material can have a memory when manipulated into a selected shape . additionally , parts of the headrest can have pliable parts , such as the chin rest , and / or the vertical member and / or the clamp member . although the preferred embodiment shows the chin rest portion having a cushion thereon , the novel headrest can also have a cushion about the vertical member . additionally , the clamp member ( s ) can also have a cushion . the invention can have additional shapes as needed . for example , the vertical member can have a pad or blinder shape , having a cushion surface with sufficient space for resting a user &# 39 ; s face against . the pad and / or blinder can also be bendable . for example , there can be an underlying material , such as but not limited to aluminum , with a cushion face , with the underlying material having a memory when bent into a selected configuration . the novel headrest 10 can be configured so that the vertical member is on the left side of the user &# 39 ; s face or on the right side of their face . additionally , two headrests 10 can be used so that the vertical members are on both the left side and right side of the user &# 39 ; s face . still another version can be headrest having both a left vertical member and a right vertical member . while the invention has been described , disclosed , illustrated and shown in various terms of certain embodiments or modifications which it has presumed in practice , the scope of the invention is not intended to be , nor should it be deemed to be , limited thereby and such other modifications or embodiments as may be suggested by the teachings herein are particularly reserved especially as they fall within the breadth and scope of the claims here appended .
apparatus , devices , systems , and methods for clamping a portable headrest with chin support on top a back of a seat , which is both adjustable and foldable to be portable for ease in transport . the horizontal chin rest pivotally attached to the bottom of a vertical member allows a sitting person &# 39 ; s head to be supported in an upright position , while restricting movement both forward and side to side .