Computer mouse with non-impact magnet-based switch

1 . A computer mouse comprising:

a housing;

a button that is translatable relative to at least a portion of the housing, the button coupled to a deflection plate, the deflection plate comprising a movable portion;

a first magnet coupled on the movable portion of the deflection plate, the first magnet being translatable along a predefined path, a surface of the first magnet defining a first plane; and

a second magnet disposed proximate the predefined path such that at least a portion of a magnetic field of the second magnet extends into a medial portion of the predefined path, a surface of the second magnet defining a second plane;

wherein the first magnet has a first pole and a second pole, and the second magnet has a third pole and a fourth pole;

wherein the third pole faces the first pole and the fourth pole faces away from the first pole;

wherein a distance from the first pole to the third pole is less than a distance from the first pole to the fourth pole;

wherein a polarity of the first pole is the same as the polarity of the third pole;

wherein when an actuation force is applied on the button, the first magnet moves in a direction along the predefined path; and

wherein when moving in the direction along the predefined path, repulsive forces between the first and second magnets cause the deflection plate to produce haptic feedback when the first magnet crosses a cross-over point that is located where the first plane of the first magnet is co-planar with the second plane of the second magnet.

2 . The computer mouse of claim 1 , wherein the deflection plate is arranged to snap back when the actuation force is removed.

3 . The computer mouse of claim 1 , wherein the repulsive forces between the first and second magnets reduce an amount of the actuation force applied on the button after the first magnet crosses the cross-over point in the direction along the predefined path.

4 . The computer mouse of claim 1 , wherein the deflection plate is arranged to generate a noise level of 30 dBA or less when producing the haptic feedback.

5 . The computer mouse of claim 1 , wherein the deflection plate comprises a first end and a second end opposite the first end, and wherein the first magnet is disposed on the first end of the deflection plate.

6 . The computer mouse of claim 5 , wherein the housing comprises a support structure and wherein the second end of the deflection plate is coupled to the support structure.

7 . The computer mouse of claim 1 , wherein the second magnet is disposed laterally offset from the predefined path and is within 0.5 mm of the predefined path.

8 . The computer mouse of claim 1 , wherein the housing comprises a sensor arranged to sense changes in a position of the deflection plate, wherein the sensor comprises a light emitting diode (LED) and a photo-transistor, wherein the LED and the photo-transistor are disposed in the housing under the deflection plate.

9 . A switch comprising:

a deflection plate mounted on a support structure, the deflection plate comprising a movable portion;

a first magnet coupled on the movable portion of the deflection plate, the first magnet being translatable along a predefined path;

a second magnet disposed proximate the predefined path such that at least a portion of a magnetic field of the second magnet extends into a medial portion of the predefined path;

wherein the first magnet has a first pole and a second pole, and the second magnet has a third pole and a fourth pole;

wherein the third pole faces the first pole and the fourth pole faces away from the first pole;

wherein a distance from the first pole to the third pole is less than a distance from the first pole to the fourth pole; and

wherein a polarity of the first pole is the same as the polarity of the third pole;

a third magnet disposed above the deflection plate; and

a fourth magnet disposed under the deflection plate, wherein the third and fourth magnets are arranged to dampen vibrations of the deflection plate.

10 . The switch of claim 9 , wherein the second magnet is disposed laterally offset from the predefined path and is within 0.5 mm of the predefined path.

11 . The switch of claim 9 , wherein the deflection plate comprises a bent portion that extends downwards to a fixed location and secured to the fixed location.

12 . The switch of claim 9 , further comprising a ferromagnetic structure disposed alongside the second magnet, wherein the ferromagnetic structure is arranged to increase a concentration of the magnetic field of the second magnet.

13 . A switch comprising:

a deflection plate mounted on a support structure, the deflection plate comprising a movable portion;

first and second magnets coupled on the movable portion of the deflection plate, the first and second magnets being translatable along a predefined path; and

third and fourth magnets disposed proximate the predefined path such that at least a portion of a magnetic field of the third magnet and at least a portion of a magnetic field of the fourth magnet extends into a medial portion of the predefined path;

wherein the first magnet has a first pole and a second pole;

wherein the second magnet has a third pole and a fourth pole;

wherein the third magnet has a fifth pole and a sixth pole;

wherein the fourth magnet has a seventh pole and an eight pole;

wherein the first pole faces the fifth pole, and the third pole faces the seventh pole, and the second pole faces away from the sixth pole and the fourth pole faces away from the eight pole;

wherein a distance from the first pole to the fifth pole is less than a distance from the first pole to the sixth pole;

wherein a distance from the third pole to the seventh pole is less than a distance from the third pole to the eight pole; and

wherein a polarity of the first pole is opposite the polarity of the fifth pole.

14 . The switch of claim 13 , wherein a polarity of the third pole is opposite the polarity of the seventh pole.

15 . A switch comprising:

a compliant structure having a movable portion;

first and second magnets coupled on the movable portion of the compliant structure, the first and second magnets being translatable along a predefined path; and

third and fourth magnets disposed proximate the predefined path such that at least a portion of a magnetic field of the third magnet and at least a portion of a magnetic field of the fourth magnet extends into a medial portion of the predefined path;

wherein the first magnet has a first pole and a second pole;

wherein the second magnet has a third pole and a fourth pole;

wherein the third magnet has a fifth pole and a sixth pole;

wherein the fourth magnet has a seventh pole and an eight pole;

wherein the first pole faces the fifth pole, and the third pole faces the seventh pole, and the second pole faces away from the sixth pole and the fourth pole faces away from the eight pole;

wherein a distance from the first pole to the fifth pole is less than a distance from the first pole to the sixth pole;

wherein a distance from the third pole to the seventh pole is less than a distance from the third pole to the eight pole; and

wherein a polarity of the first pole is opposite the polarity of the fifth pole.