Patent attributes
A waterproof tightening structure for a signal connecter includes a bolt sleeve bored with a through insert hole provided inside with an annular stop edge formed with an annular holding groove and a first engage surface. A tightening connecter is inserted in the insert hole, and has a flange resisting the stop edge of the bolt sleeve and its second engage surface loosely fixed with the first engage surface. A fixing outer sleeve is secured with the annular projection of the tightening connecter. An elastic waterproof washer is received in an annular recess between the annular projection and the second engage surface and resisted by both the annular holding groove of the bolt sleeve and the front end of the fixing outer sleeve. Thus, the waterproof washer is closely and elastically held by the bolt sleeve, the tightening connecter and the fixing outer sleeve, able to block off moisture.
