Patent ID: 7000878

Claim:
A pivotal shaft assembly for a plane display comprising: a) a bottom plate; b) a fixing member having: i) a support base connected to a front of the bottom plate; and ii) a joint seat having a shaft groove through a center thereof; c) a rotational member being a U-shaped frame and having: i) two wing plates protruding outwardly from opposing ends thereof, each of the two wing plates having an engaging hole, the joint seat being located between the two wing plates; ii) two packing rings, one of the two packing rings being located between each of the two wing plates and the joint seat; and iii) an axial bolt inserted through the engaging hole of a first wing plate of the two wing plates, the shaft groove, and the engaging hole of a second wing plate of the two wing plates, the axial bolt being connected to a threaded fastener at a first end thereof selectively securing the joint seat between the two wing plates; and d) a spherical nest device having: i) a connecting stem having a positioning ball and an extension rod connected to the positioning ball; ii) first and second semi-spherical durable rings; iii) a blocking lid covering the first semi-spherical durable ring and having a through hole, the extension rod extending through the through hole and is connected to the rotational member; and iv) a front cover connected to the blocking lid and the rotational member on opposite sides thereof, the second semi-spherical durable ring being inserted into the front cover, the first and the second semi-spherical durable rings are located on opposing sides of the positioning ball between the front cover and the blocking lid, wherein the rotational member is pivotally adjustable with respect to the fixing member, and the front cover is pivotally and rotatably adjustably with respect to the rotational member.