| 摘要 |
<p>A dust-free button assembly is disposed on a substrate carrying a switch to be triggered to generate a signal. The dust-free button assembly includes a flexible member disposed on the substrate and a pressed body disposed above the switch. The pressed body includes a button cap and a post. The button cap includes an upper surface and a recessed lower surface. One end of the post is connected to the lower surface while the other end is connected to the flexible member. An air tunnel runs through the post, and the post includes an outlet communicating the air tunnel. An air-contained-space is located between the post, the flexible member, and the substrate; and the air tunnel communicates the air-contained-space. When the flexible member is deformed by the post, the air in the air-contained-space is forced to be exhausted through the air tunnel and the outlet to remove dust.</p> |
