Abstract: A chassis used for an electronic device is disclosed, comprising: a main body (21) suitable for internally accommodating the electronic device, wherein the main body has an opening on at least one of its sides for accommodating the optional accessories of the electronic device; and a panel (22) for enclosing the opening when closed and exposing the opening when opened. The panel (22) is suitable to be connected with a cable (23), the first end of which is suitable for being electrically connected to the electronic device and the second end of which is suitable for being electrically connected to the optional accessories. The panel (22) maintains the cable (23) within the main body (21) when closed, and exposes the second end of the cable (23) when opened. According to an embodiment of the present invention, A UPS arranged inside the chassis described above is provided.

Abstract: Abstract in the disclosure a retaining device (1) for stopping a relative movement between a rail member and a sliding rack (3) is provided, includes: a first member (11), having a first engagement portion; a second member (12), having a second engagement portion; and a handle member (13) pivotally mounted onto the first member (11) via a pivot (14). The second member (12) includes a stopping portion (121), and the handle member (13) includes a first contacting edge (131) and a second contacting edge (132) which are configured to selectively abut against the stopping portion by means of the pivotal movement of the handle member (13).