| 摘要 |
A dart has a cavity extending rearwardly from a front end of the main body for a predetermined distance to an end wall, and a point assembly comprises a collar detachably securable to the front end of the main body, the collar having an axially-extending aperture extending therethrough, and a point comprising an elongated shaft with a pointed front end, the shaft extending through the collar and having a forwardly tapering portion at least in the region of the collar. The forwardly tapering shaft portion engages a rear end of the collar in a forward position of the point relative to the body to limit forward movement of the point relative to the body and permitting the body and collar to move forwardly relative to the point, when the point hits the target, to cause the cavity end wall to engage a rear end of the point shaft and drive the pointed front end into the target and to permit rotation of the body relative to the point about its longitudinal axis.
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