Power strip device for powering a master load and multiple slave loads

• US 7,973,425 B2
• Filed: 07/10/2007
• Issued: 07/05/2011
• Est. Priority Date: 04/20/2007
• Status: Expired due to Fees

• Current Assignee: Primax Electronics Limited
• Original Assignee: Primax Electronics Limited
• Inventors: Chen, Kuang-Che
• Primary Examiner(s): Fureman, Jared J
• Assistant Examiner(s): Fauth, Justen
• Application Number:
  US11/775,329
• Publication Number:
  US 20080261453A1
• Time in Patent Office: 1,456 Days
• Field of Search: None
• US Class Current: 307/12
• CPC Class Codes: H01R 13/66 Structural association with built-in electrical component coupling devices having concentrically or coaxially-arranged contacts H01R24/38
• CPC Class Codes: H01R 13/70 with built-in switch
• CPC Class Codes: H01R 25/003 the coupling part being secured only to wires or cables

Abstract

A power strip device includes a power plug, a master power outlet, multiple slave power outlets and a control circuit. The control circuit includes an inductor, a reed switch and a switching circuit. Under the control of the control circuit, the power strip device allows the slave power outlets to be automatically turned on or off simultaneous with the master power outlet being turned on or off.

Claims

1. A power strip device for delivering power to a master load product and multiple slave load products, said power strip device comprising:

a power plug coupled to a utility power source to receive power from said utility power source;

a master power outlet for delivering power to said master load product;

multiple slave power outlets for delivering power to said multiple slave load products, wherein said slave load products are peripheral devices of said master load product; and

a control circuit electrically connected to said master power outlet and said multiple slave power outlets for controlling ON/OFF states of said master load product and said multiple slave load products, said control circuit including an inductor, a reed switch and a switching circuit, said switching circuit comprising a relay switch to control power to said multiple slave power outlets, wherein an induction current flowing through said inductor is greater than a threshold value when said master load product is booted, such that said reed switch is switched to an ON state to provide power to said switching circuit and close said relay switch and enable said multiple slave load products connected to said multiple slave power outlets, and wherein said induction current flowing through said inductor is less than said threshold value when said master load product is powered off, such that said reed switch is switched to an OFF state to disconnect power to said switching circuit and open said relay switch and disenable said multiple slave load products connected to said multiple slave power outlets, such that there is no power consumption of the reed switch or switching circuit when the master load product is powered off.

2. The power strip device according to claim 1 further including a surge protector and a switching circuit control unit.

3. The power strip device according to claim 2 wherein said switching circuit further comprises two diodes.

4. The power strip device according to claim 1 wherein said master load product is a host computer.

5. The power strip device according to claim 4 wherein said multiple slave load products include printers, monitors, scanners or speakers.

6. The power strip device according to claim 1 wherein said multiple slave load products are connected with each other in parallel.