| 摘要 |
The present invention relates to a magnet pump in which an internal magnet is caused to rotate from outside the housing in order to cause rotation of the impeller. More particularly, an improvement is made in order to improve the durability of the outer magnet. In a magnetic coupling structure in which an inner magnet disposed on an impeller is accommodated in a cylindrical accommodating portion of the housing, the outer circumferential surface of this accommodating portion is loosely inserted into the inner circumferential surface of a cylindrical outer magnet which is supported on its outer circumferential surface by a magnet cup body, and which rotates together with this magnet cup body, and the impeller rotates in accordance with the rotation of the outer magnet, a cylindrical covering member which covers the inner circumferential surface of the abovementioned outer magnet is mounted on the outer magnet.
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