| 摘要 |
A drinking water filter element includes a filter housing including a protruded portion on an end thereof. The protruded portion includes outer threading having a threading path in which a gap is defined. A cap is removably mounted to the end of the filter housing and includes a peripheral wall having inner threading on an inner peripheral face thereof. The cap further includes an opening extending through the peripheral wall and aligned the gap. A switch extends through the opening of the cap and movable between an engaging position engaged in the gap of the filter housing such that the cap can not be disengaged from the filter housing and a disengaging position disengaged from the gap of the filter housing such that the cap can be unscrewed from the filter housing.
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