| 摘要 |
PURPOSE: An extension for a billiard cue is provided to offer frictional force to the billiard cue inserted into the inner wall of an insertion hole. CONSTITUTION: An extension for a billiard cue comprises a joint part(110), an extension part(120), a friction member(130), and one or more elastic members(140). In the joint part, an insertion hole into which one end of a billiard cue is inserted is formed. The extension part is extended from the joint part. The friction member provides frictional force to the billiard cue inserted into the inner wall of the insertion hole. The elastic member provides elastic force to one end of the billiard cue.
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