14 show yet another second optional embodiment 245 for the bushing generally numbered 45 in fig2 through 9 it is sometimes desirable that a particular adjusted angle of extension angle 33 in fig1 and hence the angle of link 37 angle 47 in fig7 and 8 is cancelled when the collapsible arms 11 13 in fig1 reach the retracted position so that the front bar 9 in fig1 may abut against and close the cassette opening 31 in fig1 in a predefined angular orientation one such mechanism is described in gb 2042058 and uses a transversely movable locking bolt which is moved by the awning arm through a linking rod it has been found that transverse movement of such a locking bolt can be somewhat difficult if this is at the same time also forced against the screw spindle element the bushing arrangement 245 of fig1 through 14 can overcome this drawback and would also result in a very compact arrangement to this end the bushing 245 has an inner bushing 247 and a concentric hollow outer bushing 251 accommodated in a cavity of the inner bushing is threaded nut 249 adapted to engage the screw threaded section 67 of the screw spindle 41 the nut 249 as best shown in fig1 is also contoured to allow accommodation within the hollow interior of the hollow outer bushing 251 the inner bushing 247 is provided with an opening 253 large enough to allow unhindered axial movement of the screw spindle 41 but small enough to prevent passage of the nut 249 the outer bushing 251 is provided.