Mobile terminal device

• US 8,543,175 B2
• Filed: 09/16/2005
• Issued: 09/24/2013
• Est. Priority Date: 09/16/2005
• Status: Expired due to Fees

• Current Assignee: Fujitsu Connected Technologies Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kobayashi, Hidekatsu, Murata, Wataru, Matsuda, Hiroaki, Kajiwara, Yoshifumi, Watanabe, Masamichi, Araki, Tatsuhito, Kato, Yoshiaki
• Primary Examiner(s): Urban, Edward
• Assistant Examiner(s): Sorowar, Golam
• Application Number:
  US11/991,154
• Publication Number:
  US 20090264166A1
• Time in Patent Office: 2,930 Days
• Field of Search: 455/550.1, 455/90.3, 4555751-5753, 455/66.1
• US Class Current: 455/575.3
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04M 1/0216 Foldable in one direction, i.e. using a one degree of freedom hinge
• CPC Class Codes: H05K 1/0218 by printed shielding conductors, ground planes or power plane H05K1/0236 takes precedence
• CPC Class Codes: H05K 1/0254 High voltage adaptations; Electrical insulation details; Overvoltage or electrostatic discharge protection electrostatic discharge protection for electric apparatus in general H05K9/0067, H05K9/0079; Arrangements for regulating voltages or for using plural voltages
• CPC Class Codes: H05K 1/0393 Flexible materials H05K1/038 takes precedence; specific organic compositions are classified in H05K1/0313 and subgroups
• CPC Class Codes: H05K 1/147 at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit H05K1/148 takes precedence
• CPC Class Codes: H05K 1/148 Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means
• CPC Class Codes: H05K 2201/041 Stacked PCBs, i.e. having neither an empty space nor mounted components in between
• CPC Class Codes: H05K 2201/051 Rolled

Abstract

To provide a mobile terminal device that can eliminate influence of static electricity upon signal lines of a signal-line flexible board that is placed through a connecting unit that connects two casings to be able to overlie one another. In the mobile terminal device, one of the casings and the other casing are connected through a connecting unit to be able to overlie one another, and a signal-line flexible board that connects circuit boards housed in one of the casings and the other casing, respectively, is placed through the connecting unit. The mobile terminal device includes a pair of frame-grounded flexible boards that are formed wider than the signal-line flexible board to have a conductor pattern frame grounded, and sandwich both outer surfaces of the signal-line flexible board therebetween.

Claims

1. A mobile terminal device comprising:

two casings, each containing a circuit board, connected through a connecting unit to be able to overlie one another;

a signal-line flexible board that is provided through the connecting unit to connect the circuit boards of the casings; and

a pair of frame-grounded flexible boards that are formed wider than the signal-line flexible board to have a conductor pattern frame grounded, and sandwich both outer surfaces of the signal-line flexible board therebetween,

wherein the frame-grounded flexible boards have a reinforcement of a nonconductor material on both sides of an outer surface not facing to the signal-line flexible board, and edge faces of the reinforcement wider than the signal-line flexible board are intermittently peeled in the longitudinal direction of the frame-grounded flexible boards to expose the conductor pattern.

2. The mobile terminal device according to claim 1, wherein

the connecting unit has a foldable hinge structure, and armored cases of the casings are metallic cases, and

a part of the armored cases in the hinge structure at which the signal-line flexible board is placed, is made of a resin material.

3. The mobile terminal device according to claim 1, wherein

one of the casings includes a grounded antenna plate near the connecting unit, and

the antenna plate includes an extended plate member that is extended into the connecting unit to turn around outside of the signal-line flexible board from a part of the antenna plate.

4. The mobile terminal device according to claim 3, wherein the extended plate member is formed wider than the signal-line flexible board.

5. The mobile terminal device according to claim 1, wherein the signal-line flexible board includes plural boards.

6. The mobile terminal device according to claim 1, wherein the connecting unit has a foldable hinge structure, and the signal-line flexible board is curled to make one turn in the hinge structure.