with reference to the drawings , represented is a hospital bed 11 comprising , in the illustrated embodiment , an upper chassis 13 forming the sleeping surface , intended to receive a mattress , not shown . the upper chassis comprises , in the illustrated embodiment , a head frame 15 covered by a panel 16 and a foot frame 17 covered by a panel 18 . the two frames are hinged on either side of a central part 20 ( which itself includes two panels ). the bed is also equipped with a headboard 22 , a footboard 23 and two side barriers 24 , collapsible at the lower part of the upper chassis 13 . the two frames 15 and 17 can therefore be raised by hinged pivoting on either side of the central part 20 . according to an aspect of the disclosed embodiment , the bed 11 is equipped with at least one ( in this instance , two ) patient mobility aid device 25 ( see fig3 ), enabling said patient to perform certain movements , particularly to sit up or lie down , or even to get in and out of bed if the patient is able to do so . according to the illustrated example , one of the devices 25 is attached to the head frame 15 and the other is attached to the foot frame 17 . each device 25 comprises a support crossmember 27 of a length corresponding to ( i . e ., oriented along ) the width of the bed 11 and at least one arm 29 ( preferably two ) ending in a grip 31 . the crossmember is hollow in order to house the arm 29 or each arm 29 when the grip is in the stored position . in other words , each arm 29 defines with the crossmember 27 a telescopic structure such that the corresponding grip 31 can be moved to a usage position situated above and outside the edge of the bed 11 from its storage position near the respective end of the crossmember 27 . according to the illustrated example , the device 25 is equipped with two arms 29 , each ending in a grip 31 , projecting at one respective end of the crossmember 27 . more specifically , the crossmember 27 comprises a rectilinear middle section 32 formed from a rail - type c - shaped metal structural shape , the open side facing the floor , and two guide end fittings 34 disposed at the ends of said middle section 32 . each guide end fitting 34 is here composed of two shells 35 , symmetrical overall , made of plastic material , assembled by screws , to fit tightly around each end of said middle section 32 and extend it . the end fittings 34 are mounted on the ends of the middle section 32 and attached thereto . the support crossmember 27 thus constructed is fitted at each of its ends with an attachment means or coupler shaped and sized to be attached to a side element of said bed 11 , in this instance a frame of the chassis . more specifically , the crossmember 27 is mounted between two parallel longitudinal elements 37 of the head frame 15 or the foot frame 17 . thus , the crossmember 27 can be mounted perpendicular to the longitudinal dimension of the bed between these two parallel longitudinal elements 37 of the frame 15 or 17 . in the example described , each guide end fitting 34 comprises one such coupler or attachment means that is composed of a u - shaped bracket 40 , opening laterally outward . the height of the opening of the bracket 40 generally corresponds to the thickness of the longitudinal element 37 . at least one arm of the bracket 40 , for example an arm 42 attached by screws to the lower part of the end fitting 34 , is sufficiently flexible to allow a clamped fitting of the bracket 40 onto the element 37 in spite of the presence on this arm 42 of a spur 44 . said spur 44 is capable of cooperating with a corresponding hole 46 ( see fig5 ) in the longitudinal element 37 , for attaching the assembly of said patient mobility aid device to the bed frame . for example , fig4 to 8 illustrate the assembly and attachment of the device 25 to the foot frame 17 . said assembly is begun by raising the panel 18 , then the crossmember 27 is fitted at an angle , the two brackets 40 being fitted between the elements 37 ( fig4 and 5 ). fig5 shows the hole 46 of one of the elements 37 , at the lower part thereof . then , as shown in fig6 and 7 , the device 25 is pivoted in its entirety until the spur 44 of each bracket is inserted in the respective hole . finally , the panel 18 is put back in place ( see fig8 ), said panel 18 having cutouts allowing the passage of the end portions of the guide end fittings 34 on either side of the bed 11 . it will be noted that when a side barrier 24 is raised , the arm 29 of the device situated on the same side cannot be raised in the illustrated embodiment . according to the illustrated embodiment , each arm 29 is curved , and the curved part , excluding the grip 31 , can be fully housed ( see fig3 , right side ) inside the middle section 32 and the respective end fitting 34 . to accomplish this , each guide end fitting 34 comprises internally a guide channel 47 , ascending overall , in which the arm 29 is partially housed and slides . the channel 47 extends between an aperture 49 of said end fitting 34 engaged at the corresponding end of said middle section 32 and an upper outlet 51 defined above said attachment means , i . e . the bracket 40 . the relatively flexible plastic material of the end fitting 34 makes it possible to stabilize the position of the grip 31 by elastic forced insertion into the end fitting 34 . more precisely , said end fitting 34 comprises , in some embodiments , an elastic insertion indentation 48 of the grip 31 , defined in the vicinity of said upper outlet 51 of the guide channel , for the immobilization of said grip 31 in the storage position . it should be noted that each guide channel 47 comprises a lower wall with a very wide v - shaped opening defining a concave bottom 52 in which , as will be seen below , the lower end of the arm is supported and stabilized in the usage position ( see fig3 , left part ). each arm 29 comprises a curved tubular section 54 one end 56 ( upper ) of which is flat for attaching the grip 31 . said grip always projects out of the upper outlet 51 of the end fitting 34 in the illustrated example . a locking lever 58 is slidably engaged inside the other end of the tubular section 54 . it comprises a round end 60 forming a sort of ball - and - socket joint and projecting from the tubular section 54 . this round end 60 comprises two lateral extensions 62 engaging with indentations 64 defined along the inner walls of the guide channel 47 . the tubular section 54 is also provided , in the vicinity of this end , with a transversal pin 65 that also engages with said indentations 64 . these indentations 64 are such that , when the arm 29 is pulled upward , the round end 60 of the lever penetrates into the end fitting 34 and reaches the above - mentioned concave bottom 52 of the guide channel 47 . in the same path , each end of the pin 65 finds a clearance in a narrower ascending extension 67 of each indentation 64 . said extensions 67 have closed upper ends that constitute stops for the pin 65 . a coil spring 69 is installed in a cavity 70 of the lever 58 . it is inserted between the pin 65 and the bottom of said cavity 70 , in order to push said lever 58 towards the interior of the curved tubular section 54 , as can be seen in fig3 , right portion . furthermore , the inner end of the lever 58 , engaged in the tubular section 54 , is provided with a lateral push button 74 . the tubular section 54 is provided with a hole 76 located in the vicinity of the push button 74 ( to the left of the push button 74 in the right portion of fig3 ) and a leaf spring 79 is attached to the push button 74 and is in sliding contact with the inner wall of the curved tubular section 54 . thus , said push button 74 is pushed to engage in the hole 76 when it reaches a position facing said hole 76 if a relative movement is produced between the lever 58 and the curved section 54 . the operation is as follows : when it is desired to use the patient mobility aid device , the grip 31 is taken out and pulled upward and outward . at first , the arm assembly slides in the guide cavity 70 , pulling the lever 58 . toward the end of the path , the rounded end 60 is guided by the indentations 64 and the arm stands up . at the end of the path , the ends of the pin 65 engage in the extensions 67 of the indentations , which results in the compression of the spring 69 and thus by a relative movement between the curved tubular section 54 and the lever 58 . this movement causes the engagement of the push button 74 ( forming a lock ) in the hole 76 . as of this moment , the situation is as it is represented in fig3 , left side , where the slightly extended arm 29 , now of a fixed length , is held in the standing position by a wedging effect between the bottom 52 and the upper outlet 51 . to return the arm 29 and its grip to the storage position , the push button 79 is pushed to make it enter the curved tubular section 54 while pushing down on the grip 31 . it should be noted that , because each patient mobility aid device 25 is mounted on a pivoting frame 15 , 17 of adjustable pitch , the positioning of the frame ( its pitch ) makes it possible to adjust the position of the grip ( height ) depending on the morphology of the patient . according to one variation , represented in fig9 to 11 , the grip 131 comprises , at one side of its point of attachment to said arm 29 , a curved handle 132 extending beyond said point of attachment , to facilitate gripping in the sit - up phase of the patient . the handle 132 here is curved downward . moreover , said grip 131 is extended on the other side of the point of attachment to the arm 29 by a helical segment 134 of oblong cross section facilitating thrust in the final phase of the patient &# 39 ; s sitting upright , while opposing the grip reflex . these two features are independent , in particular the helical segment 134 can constitute the main part of said grip 131 with or without handle 132 , which , if there is one , can have a different shape . although certain illustrative embodiments have been described in detail above , many embodiments , variations and modifications are possible that are still within the scope and spirit of this disclosure as described herein and as defined in the following claims .
a hospital bed is equipped with a patient mobility aid device having at least one adjustable lateral grip that aids the patient in performing certain movements such as entering or exiting the bed . the patient mobility aid device includes a support crossmember having a length oriented along a width of the bed . couplers at the ends of the crossmember attach to frame elements of the bed . the crossmember houses at least one arm to which the adjustable lateral grip is coupled . the at least one arm extends and retracts with respect to the crossmember .