| 摘要 |
An automatic pump is provided to prevent a casing from being bent and to prevent fluid from being leaked out through the contiguous area of a liner and the casing. An automatic pump comprises an impeller part(100), a motor(200), and an O-ring(320). The impeller part comprises a casing(110) and an impeller(130) of the plastics. The one side of the casing is opened and the other side is shut tightly. The cross section in where the O-ring is mounted is formed in the inner circumference of the opened one end of the casing. The motor comprises a housing(210), a liner(220), and a rotary shaft(230). The opened one end side of the housing is connected with the opened one end side of the casing. An edge part of the liner is contacted with opened one end side of the casing. The rotary shaft is installed at the housing and the rotary shaft rotates the impeller. The O-ring is interposed between the casing and the liner.
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