초록 ▼

A hinge assembly for hingedly connecting a cover and a housing theretogether, such as a keypad cover and a housing of a portable radiotelephone. A generally tubular hinge arm is formed at an end portion of the cover, and two hinge pins, each having identical cam surfaces formed upon edge surfaces th

A hinge assembly for hingedly connecting a cover and a housing theretogether, such as a keypad cover and a housing of a portable radiotelephone. A generally tubular hinge arm is formed at an end portion of the cover, and two hinge pins, each having identical cam surfaces formed upon edge surfaces thereof are inserted into the hinge arm and positioned such that the cam surfaces of the respective hinge pins extend beyond opposing sides of the hinge arm such that the hinge pins are caused to rotate in unison with rotation of the cover. A spring member is tandemly-positioned between the two hinge pins to exert spring forces thereupon. Two cam followers are affixed to the housing in a manner such that the cam surfaces of the hinge pins abut against the cam followers. The cover may be rotated between an opened and a closed position and forces exerted upon the cam surfaces of the hinge pin by their abutting engagement with the cam followers urge the cover into or out of the open and closed positions during rotation of the cover, and urge the cover to remain in the open or the closed position in the absence of rotational moments exerted thereupon by the spring forces exerted upon the hinge pin by the spring member.

대표청구항 ▼

A telephone device having a hinge assembly for hingedly connecting a first substrate and a second substrate theretogether, thereby to permit positioning of the first substrate in a closed position whereat a face surface of the first substrate and a face surface of the second substrate abut against o

A telephone device having a hinge assembly for hingedly connecting a first substrate and a second substrate theretogether, thereby to permit positioning of the first substrate in a closed position whereat a face surface of the first substrate and a face surface of the second substrate abut against one another and in at least one open position whereat the first substrate extends beyond the substrate at an angled orientation relative thereto, said hinge assembly comprising: a hinge arm coupled to at least the first substrate, the hinge arm forming a transversely-extending, hinge receiving chamber defined by inner sidewalls of the hinge arm; at least one axially-extending hinge pin having a cylindrical body with an open cavity therein, a cam surface formed on an edge surface of the cylindrical body near the open cavity, the cam surface defining a continuous profile comprising first and second valley portions separated by a peak portion, wherein a first slope of the profile between the first valley portion and the peak portion is steeper than a second slope of the profile between the peak portion and the second valley portion, wherein the at least one axially-extending hinge pin has dimensions permitting insertion thereof through the hinge receiving chamber such that, when inserted therein, rotational moments exerted upon the first substrate to cause rotational movement thereof, cause corresponding rotational movement of the hinge pin; at least one circularly-shaped bushing formed in the second substrate; at least one axle concentrically disposed within the circularly-shaped bushing for placement inside of the open cavity in the cylindrical body of the hinge pin; and at least one cam follower disposed between a portion of the circularly-shaped bushing and the axle for engaging with the profile of the cam surface formed upon the edge surface of the at least one axially-extending hinge pin such that exertion of rotational moments upon the first substrate to cause rotation thereof in a first direction to position the first substrate in the closed position causes positioning, of the first valley portion of the cam surface of the hinge pin by operation of the first slope, in abutting engagement with the cam follower, and such that exertion of rotational moments upon the first substrate in an opposing direction to position the first substrate in the open position causes positioning, of the second valley portion of the cam surface of the hinge pin by operation of the second slope, in abutting engagement with the cam follower to urge the first substrate into the open position with a different force characteristic than the first substrate is urged into the closed position.