element 16 in this embodiment the resilient elements 16 are a pair of springs also referring to fig3 and 4 in assembly the pressing protrusions 106 insert into the receiving space 126 via passing through the pressing through hole 120 a the pressing protrusions 106 engage with the slide block 14 via the engagement between the first sloping surface 106 a and the second sloping surface 144 a the first connecting protrusions 104 are correspondingly accommodated in the connecting cutouts 125 the first connecting through holes 104 a are correspondingly aligned with the second connecting through holes 123 a the handle 10 is pivotally connected to the base 12 via the bolts 18 correspondingly passing through the first connecting through holes 104 a and the second connecting through holes 123 a the slide block 14 is slidablely received in the receiving space 126 via two opposite ends 16 a of each resilient element 16 correspondingly connecting to the first hook 124 b and the second hooks 149 the guiding ears 146 are correspondingly positioned in the guiding gaps 129 also referring to fig5 and 6 in use the base 12 is fixed to an electronic device not shown the locking tongue 148 protrudes out.