Cable modem device and method of assembling the same

• US 7,450,392 B2
• Filed: 11/09/2006
• Issued: 11/11/2008
• Est. Priority Date: 06/06/2003
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kudo, Katsuya, Oosawa, Masami, Abe, Shuji, Fujihara, Mikine, Isoda, Tsutomu
• Primary Examiner(s): Reichard; Dean A.
• Assistant Examiner(s): Aychillhum; Andargie M
• Application Number:
  US11/594,883
• Publication Number:
  US 20070056007A1
• Time in Patent Office: 733 Days
• Field of Search: 361/736, 361/816, 361/752, 361/760, 361/784, 361/794, 298/37
• US Class Current: 361/752
• CPC Class Codes: G06F 1/18 Packaging or power distribution
• CPC Class Codes: G06F 1/182 with special features, e.g. for use in industrial environments; grounding or shielding against radio frequency interference [RFI] or electromagnetical interference [EMI]
• CPC Class Codes: H05K 9/0018 with provisions to reduce aperture leakages in walls, e.g. terminals, connectors, cables
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing
• CPC Class Codes: Y10T 29/49126 Assembling bases
• CPC Class Codes: Y10T 29/49147 Assembling terminal to base
• CPC Class Codes: Y10T 29/49151 by deforming or shaping
• CPC Class Codes: Y10T 29/49153 with shaping or forcing terminal into base aperture

Abstract

There is discolsed a cable modem device capable of reducing unnecessary signals inputted into a circuit substrate which processes signals and signal terminals from the outside and unnecessary radiation generated by the circuit substrate, the device having a hexahedral shield case which shields a circuit substrate, and a plurality of terminals for use in input/output of the signals with respect to the circuit substrate. Each of the terminals has a noise filter function, and is fixed to the shield case.

Claims

1. A cable modem device comprising:

a first case member which shields a first circuit substrate configured to process at least analog signals;

a second case member to house and shield a second circuit substrate on which the first case member is positioned together with the first case member, the second circuit substrate configured to process at least digital signals;

an electric connection terminal disposed on and intersecting the second case member, the electric connection terminal configured to accommodate in input/output of signals between the second circuit substrate and an external device; and

another electric connection terminal intersecting with the first case member and configured to accommodate input/output of signals between the second circuit substrate and the first circuit substrate.

2. The cable modem device according to claim 1, wherein the terminal includes a noise filter.

3. The cable modem device according to claim 1, further comprising:

a protruding portion which is disposed on the second case member and which is capable of fixing or grounding the second case member with respect to an external substrate.

4. The cable modem device according to claim 1, wherein the first case member includes a connecting portion for connecting to the second circuit substrate in which the connecting portion is embedded to the second circuit substrate.

5. The cable modem device according to claim 3, wherein the electric connection terminal and the other electric connection terminal are disposed along two sides which cross a plane direction of the second circuit substrate at the right angles and which face each other.

6. The cable modem device according to claim 3, wherein the first case member includes a tetrahedron which is capable of shielding four planes crossing the plane direction of the first circuit substrate at the right angles and at least one open surface defined by the tetrahedron, and the first terminal is disposed on an optional surface of the tetrahedron.

7. The cable modem device according to claim 3, wherein the second case member includes a tetrahedron which is capable of shielding four planes crossing the plane direction of the second circuit substrate at the right angles and at least one open surface defined by the tetrahedron, and the other electric connection terminal is disposed on an optional surface of the tetrahedron.

8. The cable modem device according to claim 6, wherein the surface of the second case member on which the other electric connection terminal is disposed faces the surface of the first case member on which the electric connection terminal is disposed in a state in which the first circuit substrate is positioned between both the surfaces.

9. The cable modem device according to claim 7, wherein the surface of the second case member on which the other electric connection terminal is disposed faces the surface of the first case member on which the electric connection terminal is disposed in a state in which the first circuit substrate is positioned between both the surfaces.