| 摘要 |
<p>A portable manual air horn comprises a horn body and a housing (6), wherein, the horn body comprises a chamber for generating sound (2) and a trumpet (4). A blowhole (3) of the said chamber for generating sound (2) is connected with a corner joint (5), and the corner joint (5) further is connected with the bottom of the housing (6). Apressboard (9) is configured at the opening of the housing (6), through which a piston shaft (10) passes. One end of the piston shaft (10) is joined with a piston (8) in the housing, while the other end of the piston shaft (10) is joined with a hand lever (11) outside the housing. A spring (7) is connected between the piston (8) and housin (6).</p> |
