Lid fastening mechanism

Abstract

The present invention provides a lid fastening mechanism for fastening a lid of a device to a casing opening between two opposing flanks of the device. At least one side of the lid includes a lid flank overlapping an inner side of one of the flanks of the device. The lid flank is slidable to and fro relative to the flank of the device. The lid fastening mechanism includes a fastening post protrudingly disposed on the inner side of the flank of the device, a movement groove disposed at a position of the lid flank corresponding to the fastening post, and a snap fastener disposed to extend along an inner side of the lid flank and formed with a snap hole for snap-fit engagement with the fastening post. The fastening post can slide into the snap hole via the movement groove and thereby fasten the lid to the casing opening.

1 . A lid fastening mechanism for fastening a lid of a device to a casing opening between two opposing flanks of the device, the lid having at least one side disposed with a lid flank overlapping an inner side of one of the flanks of the device, the lid flank being slidable to and fro relative to the flank of the device, the lid fastening mechanism comprising:
 a fastening post protrudingly disposed on the inner side of the flank of the device;   a movement groove disposed at a position of the lid flank corresponding to the fastening post and comprising a groove guiding portion and a groove positioning portion, the groove guiding portion allowing the fastening post to insert into the lid flank, the groove positioning portion connecting to the groove guiding portion to guide the fastening post to a positioning position; and   a snap fastener disposed to extend along an inner side of the lid flank, with one end of the snap fastener fastened to the lid flank, with another end of the snap fastener exposed out of the lid, and formed with a snap hole corresponding in position to an end of the groove positioning portion of the movement groove for snap-fit engagement with the fastening post;   wherein the fastening post inserts into the groove guiding portion of the movement groove, slides into the groove positioning portion, and snaps into the snap hole of the snap fastener, thus fastening the lid to the casing opening.   
   
   
       2 . The lid fastening mechanism of  claim 1 , wherein the groove guiding portion is an indented groove perpendicular to a longitudinal direction of the lid flank, and the groove positioning portion is perpendicular to the groove guiding portion and extends along the longitudinal direction of the lid flank. 
   
   
       3 . The lid fastening mechanism of  claim 1 , wherein the snap fastener comprises an arch portion corresponding in position to the groove guiding portion and protruding toward the inside of the device so as to allow the fastening post to insert into the groove guiding portion. 
   
   
       4 . The lid fastening mechanism of  claim 3 , wherein the arch portion and the lid flank together form a triangle. 
   
   
       5 . The lid fastening mechanism of  claim 3 , wherein the snap fastener further comprises a resilient portion connecting to the arch portion, abutting against the lid flank, and disposed with the snap hole. 
   
   
       6 . The lid fastening mechanism of  claim 5 , wherein the snap hole is disposed at a position of the resilient portion close to the arch portion. 
   
   
       7 . The lid fastening mechanism of  claim 1 , wherein two opposing sides of the lid comprise the lid flanks overlapping the two opposing flanks of the device respectively.