| 摘要 |
A spray can holding an actuation device comprises a rim engagement element and a mechanism for compressing the rim engagement element against the rim surrounding the push-button valve on the can to attach the device to the rim. In a preferred embodiment, the compressing mechanism comprises a locking element that is selectively movable to a locking position in which it compresses the rim engagement element into a locking attachment to the rim. More specifically, the rim engagement element comprises a pair of opposed segments that together define a substantially annular interior surface that fits loosely around the exterior of the rim, and the locking element comprises a substantially annular member that is movable into and out of a compressing engagement with the exterior surface of the rim engagement element segments. As the locking element is moved into the compressing engagement with the segments, it presses them toward each other into a clamping engagement with the rim. When the locking element is moved out of the compressing engagement with the segments, the segments resiliently restore themselves to their original positions, whereby the rim engagement element can easily be separated from the rim. The rim engagement element may advantageously be provided with camming surfaces on its exterior surface to enhance and facilitate the pressing action provided by the locking element.
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