Simple engaging device

[0019]Referring to FIGS. 1 to 3, a preferred embodiment of the engaging device in accordance with the present invention basically has an elongated locating base 10 which has a facial base section and a rear base section integrated as a one piece and is embedded in a flat piece of furniture with the facial base section thereof being flush with the flat piece. The facial base section of the locating base 10 is longer than the rear section thereof. The locating base 10 provides two longitudinal holes 11 spacing apart from each other and extending through the rear base section of the locating base 10 from the facial base section thereof; both ends of each of the through holes 11 are circular ends with one of the circular ends being an enlarged circular end 12. There are two identical flat locating parts 13 oppositely disposed at two long sides of each longitudinal hole 11. Each of the flat locating parts 13 has a slant plane 131 next to the enlarged circular end 12, a first slender retaini