Multi integrated switching device structures
A permanent magnet is pivotally mounted in a top spacer layer of a switching device and rests on a flex arm created in an underlying flex circuit layer. The underside of the flex arm rests on a thin bar formed in a lower spacer layer beneath which lies a base layer including an electromagnet. Activation of the electromagnet causes rotation of the flex arm to thereby close and open electrical contacts formed respectively on the underside of the flex arm and on the top surface of the base layer.
1. In a switching device or relay, the structure comprising:
a permanent magnet pivotally mounted in a top spacer layer;
a flex circuit layer disposed beneath the permanent magnet and comprising a rotatable flex arm, a surface of the permanent magnet resting on the flex arm, an underside of the flex arm carrying first and second electrical contacts;
a lower spacer layer beneath the flex circuit layer and having first and second openings therein separated by a thin bar upon which the flex arm rests; and
a base component positioned beneath the lower spacer layer and comprising an electromagnet actuatable to rotate the flex arm clockwise or counterclockwise; and
third and fourth electrical contacts positioned on the base component to respectively make electrical contact with the first and second electrical contacts when said flex arm is caused to move in a selected direction by actuation of said electromagnet.
2. The structure of claim 1 wherein said permanent magnet resides in a cavity formed in the top spacer layer.
3. The structure of claim 2 wherein the permanent magnet is contained in a plastic case.
4. The structure of claim 3 wherein the plastic case has first and second pivot arms formed on respective sides thereof.
5. The structure of claim 4 wherein said first and second pivot arms respectively reside in centrally disposed side channels of the cavity.
6. The structure of claim 4 wherein the flex arm is suspended by its respective pivot arms residing in first and second slots.
7. The structure of claim 4 wherein a back surface of the flex arm has signal traces formed thereon which run out the pivot arms to associated circuitry.
8. The structure of claim 3 wherein the plastic case and magnet float in the cavity such that the plastic case and magnet may pivot about a pivot point.
9. The structure of claim 8 configured such that when the permanent magnet flips about the pivot point, it pushes down one side of the flex arm and raises the other side.
10. The structure of claim 9 wherein said first and second pivot arms respectively reside in centrally disposed side channels of the cavity.
11. The structure of claim 10 wherein the lower spacer layer further comprises openings on either side of the thin bar which allow the flex arm to rotate therethrough.
12. The structure of claim 1 wherein the lower spacer layer further comprises openings on either side of the thin bar which allow the flex arm to rotate therethrough.
13. The structure of claim 1 wherein a top side of the flex arm is reinforced by a thin layer of copper plating formed on a Kapton layer.
14. The structure of claim 1 further comprising a longitudinal slot cut between the first and second electrical contacts.
15. The structure of claim 1 wherein the electromagnet comprises a soft iron core and a coil and further configured such that when a power pulse is applied to the coil, one end of the electromagnet will be north and the other end will be south, causing the magnetic beam formed by the flex arm and permanent magnet flip to the south end of the electromagnet, whereafter the permanent magnet is attracted to the soft iron core so as to hold the permanent magnet in place.
16. The structure of claim 1 wherein the top spacer layer is formed of FR4 printed circuit board (“PCB”) material.
17. The structure of claim 16 wherein the lower spacer layer is formed of FR4 PCB material.
18. The structure of claim 1 wherein the lower spacer layer is formed of FR4 PCB material.
19. A switching device comprising:
a pivotally mounted permanent magnet;
a flex circuit layer disposed beneath the permanent magnet and comprising a rotatable flex arm, a surface of the permanent magnet resting on the flex arm, an underside of the flex arm carrying first and second electrical contacts;
a lower spacer layer beneath the flex circuit layer and having first and second openings therein separated by a thin bar upon which the flex arm rests; and
a base component positioned beneath the lower spacer layer and comprising an electromagnet actuatable to rotate the flex arm clockwise or counterclockwise; and
third and fourth electrical contacts positioned on the base component to respectively make electrical contact with the first and second electrical contacts when said flex arm is caused to move in a selected direction by actuation of said electromagnet.