| 摘要 |
PURPOSE:To surely absorb the vibration sound of a pump and the external pressure to a case by integrally forming circular projections on the inner wall of a main body case and on the outer wall of a pump main body respectively, and bringing the upper section and the lower section of a rubber cushioning material into contact with projections respectively. CONSTITUTION:Four circular insertion recesses 5 are integrally formed on the inner wall of a main body case 3, and four circular coupling recesses 10 are formed on the case outer wall of an air pump 8. Circular projections 6 are integrally formed on inner bottoms of insertion recesses 5, and circular projections 11 are integrally formed on inner bottoms of coupling recesses 10. The upper end and the lower end of a cylindrical rubber cushioning material 32 are inserted into the recesses 5 and recesses 10 and brought into contact with circular projections 6 and 11. When the vibration of the pump itself and the external pressure are applied, circular projections 6 and 11 are pressed into the upper and lower end faces of the rubber cushioning material 32, and the vibration sound and the external pressure are surely absorbed. |
