Patent ID: 7358926

Claim:
An antenna device for coupling a base end of an antenna rod to a free end of an antenna base such that the antenna rod is stopped at predetermined angular positions relative to the antenna base, said antenna device comprising: an intermediate member to be coupled to the base end of the antenna rod, said intermediate member comprising a projection section to be projected toward the antenna base; an abutting member comprising a base section and a projection, said projection of said abutting member projecting from said base section of said abutting member toward said projection section of said intermediate member, said intermediate member being pivotal between plural pivot positions relative to said abutting member; a biasing member-receiving section to be provided to the antenna base; and an elastic biasing member provided in said biasing member-receiving section and acting upon said base section of said abutting member to bias said abutting member toward said intermediate member such that said projection of said abutting member yieldingly presses against said projection section of said intermediate member; wherein said projection section of said intermediate member comprises a projection plate having an abutting end face that abuts against said projection of said abutting member; and wherein said abutting end face of said projection plate is shaped as a section of a polygon which has plural end faces inclined with respect to each other and which has no outwardly facing recesses that abut with said projection of said abutting member; and wherein said plural end faces are configured and arranged such that, when said intermediate member is in a first of said pivot positions relative to said abutting member, said projection of said abutting member presses against only a first one of said plural end faces and, when said intermediate member is in a second of said pivot positions relative to said abutting member, said projection of said abutting member presses against only a second one of said plural end faces.