Computer docking system having an electromagnetic lock

• US 5,812,356 A
• Filed: 08/14/1996
• Issued: 09/22/1998
• Est. Priority Date: 08/14/1996
• Status: Expired due to Term

• Current Assignee: Dell USA LP (Dell Technologies Inc.)
• Original Assignee: Dell USA LP (Dell Technologies Inc.)
• Inventors: O'Connor, Clint H.
• Primary Examiner(s): Leja, Ronald W.
• Application Number:
  US08/696,459
• Time in Patent Office: 769 Days
• Field of Search: 361/144, 361/179, 361/180, 361/732, 361/740, 361/747, 335/153, 335/157, 335/170, 335/171, 335/179, 335/192, 335/194, 335/195, 335/285, 335/289-291, 335/295, 307/119, 307/132 EA, 307/142, 439/305, 439/345, 439/350, 439/370, 439/919
• US Class Current: 361/179
• CPC Class Codes: G06F 1/1632 External expansion units, e.g. docking stations
• CPC Class Codes: H01R 13/6205 Two-part coupling devices held in engagement by a magnet
• CPC Class Codes: H01R 2107/00 Four or more poles
• CPC Class Codes: H01R 2201/06 for computer periphery
• CPC Class Codes: H01R 24/66 with pins, blades or analogous contacts and secured to apparatus or structure, e.g. to a wall

Abstract

A method and apparatus for electromechanically locking a docking station to a computer using an electromagnetic attractive force is disclosed. In a preferred embodiment, the docking station includes a latching mechanism with a ferromagnetic handle, and an electromagnet proximately located to the latching mechanism. The latch mechanically secures the docking station to the PC. The electromagnet is positioned such that, when electrically energized, the electromagnetic field produced thereby attracts the handle with sufficient force to prevent the handle from being used to disconnect the PC from the docking station. Alternatively, the electromagnet can be located in the docking station so that it is near a ferromagnetic plate in the PC when the PC is docked. The electromagnet is positioned such that, when electrically energized, the electromagnetic field produced thereby attracts the plate with sufficient force so as to physically lock the plate to the electromagnet, thereby locking the PC to the docking station.

Claims

1. A system for securing a first electrical component to a second electrical component comprising:

a locking mechanism including an electromagnet capable of selectively producing an electromagnetic field, and means attracted to the electromagnet in response to the electromagnetic field;

wherein the electromagnet is disposed in the second electrical component and the means attracted to the electromagnet is disposed in the first electrical component and, wherein, responsive to the production of the electromagnetic field by the electromagnet, the means attracted to the electromagnet is biased toward the electromagnet to secure the first electrical component to the second electrical component; and

means located at an interface between the first and second electrical components for detecting a separation of the first and second electrical components, wherein the electromagnet is caused to produce the electromagnetic field only when the separation is detected.

2. The system of claim 1 further comprising a controller electrically connected to the electromagnet for controlling when the electromagnet produces the electromagnetic field.

3. The system of claim 1, wherein an electromagnetic force is created by the electromagnetic field and the means attracted to the electromagnet by the electromagnetic force is a ferromagnetic plate.

4. The system of claim 1 further comprising a controller electrically connected to the electromagnet for controlling when the electromagnet produces the electromagnetic field and a control program executable by the controller for controlling production of the electromagnetic field by the electromagnet.

5. An apparatus for securing a docking station to a computer, the apparatus comprising:

an electromagnet capable of selectively producing an electromagnetic field; and

means attracted to the electromagnet in response to the electromagnetic field;

wherein each of the electromagnet and the means attracted to the electromagnet are disposed in at least one of the docking station and the computer and, wherein, responsive to the production of the electromagnetic field by the electromagnet, the means attracted to the electromagnet is biased toward the electromagnet to secure the docking station to the computer.

6. The apparatus of claim 5 wherein the means attracted to the electromagnet comprises a latching mechanism, said latching mechanism being biased toward the electromagnet in response to the electromagnetic field in order to prevent the latching mechanism from being unlatched by application of ordinary force thereon.

7. The apparatus of claim 5 further comprising means for electrically connecting the electromagnet to a controller of the computer when the docking station is secured to the computer for controlling the production of the electromagnetic field by the electromagnet.

8. The apparatus of claim 5 wherein the means attracted to the electromagnet is located in the computer and the electromagnet is located in the docking station.

9. The apparatus of claim 8 further comprising a first electrical connector located on the computer and a second electrical connector for connecting to the first electrical connector located on the docking station, such that whenever the computer is physically secured to the docking station via the first and second electrical connectors, the computer is in electrical connection with the docking station.

10. The apparatus of claim 9 wherein the production of the electromagnetic field by the electromagnet is controlled by a controller of the computer via the electrical connection between the computer and the docking station.

11. The apparatus of claim 5 wherein the means attracted to the electromagnet is located in the docking station and the electromagnet is located in the computer.

12. The apparatus of claim 11 wherein production of the electromagnetic field by the electromagnet is controlled by a controller of the computer.

13. The apparatus of claim 5 wherein the electromagnet is connected to a first electrical connector disposed on the computer and the means attracted to the electromagnet is connected to a second electrical connector disposed on the docking station, the first and second electrical connectors being matingly connectable to one another, such that when the electromagnet is producing the electromagnet field, the means attracted to the electromagnet is biased toward the electromagnet, thereby biasing the second connector toward the first connector and maintaining electrical contact between the two connectors.

14. The apparatus of claim 13 further comprising means for retractably connecting the second electrical connector to the docking station, such that once the docking station is secured to the computer via the first and second electrical connectors, and, so long as the electromagnet is producing the electromagnetic field, the computer and the docking station may be separated up to a given distance from one another without electrical contact therebetween being disrupted.

15. The apparatus of claim 5 further comprising a control program executable by a controller of the computer for controlling production of the electromagnetic field by the electromagnet.

16. A locking mechanism for securing two computer electrical components together, the locking mechanism comprising:

an electromagnet capable of producing an electromagnetic field;

means attracted to the electromagnet in response to the electromagnetic field; and

a pair of engaged connectors, a first one of the connectors being mounted on a first one of the components and a second one of the connectors being mounted on a second one of the components;

wherein each of the electromagnet and the means attracted to the electromagnet are disposed in at least one of the components and, wherein, responsive to the production of the electromagnetic field by the electromagnet, the means attracted to the electromagnet is biased toward the electromagnet to secure the first component to the second component and resist disengagement of the connectors.

17. The locking mechanism of claim 16, wherein the electromagnet is electrically connected to a controller for regulating when the electromagnet produces the electromagnetic field.

18. The locking mechanism of claim 16, wherein the means attracted to the electromagnet comprises a latching mechanism, the electromagnetic field creating an electromagnetic force between the electromagnet and the latching mechanism to prevent unlatching of the latching mechanism when ordinary force is applied thereon.

19. The locking mechanism of claim 16, wherein the means attracted to the electromagnet is located in the first electrical component and the electromagnet is located in the second electrical component.

20. The locking mechanism of claim 19 wherein, when an electromagnetic force is created by the electromagnetic field, the electromagnetic force causes the second electrical connector on the second electrical component to attract a ferromagnetic plate located proximate the first electrical connector on the first electrical component.

21. The locking mechanism of claim 16, further comprising retracting means for connecting the second connector to the second electrical component, whereby when the second electrical component is separated from the first electrical component upon the application of ordinary force, the first connector and a second connector of the second component remain secured and the retracting means biases the first and second components together.

22. A method for securing together a first and a second electrical component comprising:

providing the first electrical component with a first electrical connector;

providing the second electrical component with a mating second electrical connector;

providing, in one of the first and second electrical components, an electromagnet for producing an electromagnetic field when electrically energized;

providing a ferromagnetic plate in the other of the first and second electrical components;

connecting the first and second electrical connectors together, thereby creating an electrical connection between the first and second electrical components;

wherein the electromagnet and the ferromagnetic plate are disposed relative to the first and second connectors such that production of an electromagnetic field by the electromagnet biases the electrical connectors together such that they cannot be separated responsive to the application of ordinary force.

23. The method of claim 22 further comprising:

providing means for extending the first electrical connector from the first electrical component a given distance while biasing the first electrical connector toward the first electrical component such that the first and second electrical components may be separated from one another a given distance without disconnecting the first and second electrical connectors.

24. The method of claim 22 further comprising:

detecting a physical separation of the first and second electrical components; and

electrically energizing the electromagnet in response to the detection of a physical separation of the first and second electrical components.

25. A system for securing a first electrical component to a second electrical component, comprising:

a first electrical connector disposed in the first electrical component;

a second electrical connector disposed in the second electrical component for mating with the first electrical connector to electrically connect the first and second electrical components;

a locking mechanism comprising an electromagnet positioned in the first component capable of selectively producing an electromagnetic field, and means positioned in the second component attracted to the electromagnet in response to the electromagnetic field;

wherein an electromagnetic force created by the electromagnetic field causes the first electrical connector of the first component to attract a ferromagnetic plate of the second component, the locking mechanism further comprising

retracting means for connecting the first connector to the first electrical component, whereby, when the first electrical component is separated from the second electrical component upon the application of ordinary force, the first connector and a second connector of the second component remain secured and the retracting means biases the first and second components together.

26. A computer docking system, comprising:

a first electrical component;

a second electrical component;

wherein at least one of said electrical components includes a locking mechanism, the locking mechanism comprising an electromagnetic capable of selectively producing an electromagnetic field, and means attracted to the electromagnet in response to the electromagnetic field; and

means located at an interface between the first and second electrical components for detecting a separation of the first and second electrical components, wherein the electromagnet is caused to produce the electromagnetic field only when the separation is detected.

27. A method for securing a first and a second electrical component together, the method comprising:

providing at least one of the electrical components with at least one electromagnet for producing an electromagnetic field when electrically energized;

providing at least one of the electrical components with at least one ferromagnetic plate;

electrically energizing the at least one of the electromagnets when the electrical components are in electrical contact with one another; and

providing means for extending a first electrical connector from the first electrical component a given distance while biasing the first electrical connector toward the first electrical component such that the first and second electrical components may be separated from one another a given distance without disconnecting the first and a second electrical connector, wherein the at least one ferromagnetic plate is disposed such that electrical energization of the at least one electromagnet causes the at least one ferromagnetic plate to be attracted to the at least one electromagnet in a manner that secures the components together.

28. The method of claim 27 further comprising:

detecting a physical separation of the first and second electrical components; and

electrically energizing the at least one electromagnet in response to the detection of a physical separation of the first and second electrical components.

29. A locking mechanism for securing two computer electrical components together, each component including a connector for electrically connecting the components, the locking mechanism comprising:

an electromagnet disposed in one of the electrical components, the electromagnet being capable of selectively producing an electromagnetic field; and

a latching mechanism for mechanically securing the first electrical component to the second electrical component when they are electrically connected, wherein the latching mechanism is responsive to an electromagnetic force created by the selectively produced electromagnetic field such that the electromagnetic force resists disengagement of the electrical connection.

30. The system of claim 29 further comprising means located at an interface between the first and second electrical components for detecting a separation of the first and second electrical components, wherein the electromagnet is caused to produce the electromagnetic field only when the separation is detected.

31. The system of claim 29 further comprising a controller electrically connected to the electromagnet for controlling when the electromagnet produces the electromagnetic field.

32. The system of claim 29 further comprising a controller electrically connected to the electromagnet for controlling when the electromagnet produces the electromagnetic field and a control program executable by the controller for controlling production of the electromagnetic field by the electromagnet.

33. The system of claim 29, wherein an electromagnetic force is created by the electromagnetic field and the means attracted to the electromagnet by the electromagnetic force is a ferromagnetic plate.

34. A system for securing a first electrical component having a first electrical connector to a second electrical component having a mating electrical connector, the system comprising:

a locking mechanism including an electromagnetic capable of selectively producing an electromagnetic field, and means attracted to the electromagnet in response to the electromagnetic field; and

means located at an interface between the first and second electrical components for detecting a separation of the first and second electrical components, wherein the electromagnet is caused to produce the electromagnetic field only when the separation is detected.

35. The system of claim 34, wherein an electromagnetic force is created by the electromagnetic field and the means attracted to the electromagnet by the electromagnetic force is a ferromagnetic plate.