| 摘要 |
The invention provides an air filtering device that can appropriately suppress mistaken assemblies between a shell body and a cover. A hinge part of the outer shell comprises a pair of protruding parts that are arranged on the cover and separated from each other in the circumferential direction, and a frame part which is arranged on the shell body and is provided with a pair of recessed parts into which the pair of protruding parts can be respectively inserted. The inner side parts of the two protruding parts are provided with limiting parts that extend in a direction that enables the limiting parts to get close to each other. The frame part is provided with an accommodating part and a stopping part, wherein when the protruding parts are respectively opposite to the recessed parts, the limiting parts are accommodated in the accommodating part; when one of the protruding parts is not opposite to the recessed part, the stopping part stops the limiting parts from being accommodated; when the protruding parts are respectively inserted into the recessed parts, under action of rebounding force of a sealing part of a filtering element, the protruding parts are crimped on the inner walls of the recessed parts, and the inner walls of the limiting parts and the accommodating parts do not contact with each other. |
