Methods and systems for a bind free pivoting trigger mechanism

1. A trigger assembly comprising:

a cylindrical pivot shaft having a pivot-shaft longitudinal axis;

a trigger key having a front face, a back face opposite the front face, an actuator extending from the back face, a first end, and a trigger-key longitudinal axis, wherein the first end has a plurality of through holes arranged to receive the cylindrical pivot shaft such that the pivot-shaft longitudinal axis is perpendicular to the trigger-key longitudinal axis;

a trigger-key support having an aperture for the actuator to pass through, the trigger-key support further having a plurality of pivot-shaft supports, wherein each pivot-shaft support includes a concave surface configured to receive the cylindrical pivot shaft; and

a trigger bezel having a plurality of substantially flat surfaces positioned to constrain the pivot shaft in opposition to the plurality of pivot-shaft supports, wherein the substantially flat surfaces are located at different positions along the pivot-shaft longitudinal axis than are the pivot-shaft supports.

2. The trigger assembly of claim 1 , wherein the pivot shaft is made of metal.

3. The trigger assembly of claim 1 , further comprising a spring configured to exert opposing forces on the back face and the trigger-key support.

4. The trigger assembly of claim 1 , further comprising means to removably attach the trigger assembly to a mobile electronic device.

5. The trigger assembly of claim 1 , further comprising a trigger-key stop mechanism.

6. The trigger assembly of claim 1 , further comprising at least one additional key.

7. The trigger assembly of claim 6 , wherein the at least one additional key comprises a programmable key.

8. The trigger assembly of claim 1 , wherein:

the trigger key and the received pivot shaft are disposed between the trigger-key support and the trigger bezel, and

the trigger bezel attaches to the trigger-key support.

9. The trigger assembly of claim 1 , wherein the concave surface has a parabolic shape.

10. The trigger assembly of claim 1 , wherein the concave surface has a semi-circular shape.

11. The trigger assembly of claim 1 , wherein each pivot-shaft support further comprises walls adjacent to the concave surface, wherein the walls and the concave surface are collectively configured in a U shape.

12. The trigger assembly of claim 1 , further comprising at least one pivot-shaft constraint configured to restrict translation of the pivot shaft along the pivot-shaft longitudinal axis.

13. The trigger assembly of claim 12 , wherein at least one of the at least one pivot-shaft constraints is disposed on the trigger key.

14. The trigger assembly of claim 12 , wherein at least one of the at least one pivot-shaft constraints is disposed on the trigger bezel.

15. The trigger assembly of claim 12 , wherein at least one of the at least one pivot-shaft constraints is disposed on the trigger-key support.

16. The trigger assembly of claim 1 , wherein:

at least two of the pivot-shaft supports are at respective proximal locations relative to and on respective opposing sides of a center point along the pivot-shaft longitudinal axis; and

at least two of the substantially flat surfaces are at respective distal locations relative to and on respective opposing sides of the center point along the pivot-shaft longitudinal axis.

17. A mobile electronic device comprising:

a trigger assembly comprising:

a cylindrical pivot shaft having a pivot-shaft longitudinal axis,

a trigger key having a front face, a back face opposite the front face, an actuator extending from the back face, a first end, and a trigger-key longitudinal axis, wherein the first end has a plurality of through holes arranged to receive the cylindrical pivot shaft such that the pivot-shaft longitudinal axis is perpendicular to the trigger-key longitudinal axis,

a trigger-key support having an aperture for the actuator to pass through, the trigger-key support further having a plurality of pivot-shaft supports, wherein each pivot-shaft support includes a concave surface configured to receive the cylindrical pivot shaft, and

a trigger bezel having a plurality of substantially flat surfaces positioned to constrain the pivot shaft in opposition to the plurality of pivot-shaft supports, wherein the substantially flat surfaces are located at different positions along the pivot-shaft longitudinal axis than are the pivot-shaft supports;

a circuit-board assembly comprising an electrical connector and a switch, the switch configured to be depressed by the actuator; and

a housing configured to:

mechanically receive the circuit-board assembly,

electrically connect to the electrical connector, and

removably attach to the trigger assembly.

18. The mobile electronic device of claim 17 , wherein the trigger assembly further comprises a trigger-stop mechanism that is configured, in response to a trigger-key pressure, to:

permit the actuator to move a trigger-travel distance to engage the switch; and

transfer a portion of the trigger-key pressure to the housing after the actuator moves the trigger-travel distance.

19. The mobile electronic device of claim 17 , wherein the circuit-board assembly comprises a sealing coat configured to seal an internal portion of the housing when the circuit board assembly is mechanically received in the housing.

20. A mobile electric device comprising:

a trigger assembly comprising:

a cylindrical pivot shaft having a pivot-shaft longitudinal axis,

a trigger key having a front face, a back face opposite the front face, an actuator extending from the back face, a first end, and a trigger-key longitudinal axis, wherein the first end has a plurality of through holes arranged to receive the cylindrical pivot shaft such that the pivot-shaft longitudinal axis is perpendicular to the trigger-key longitudinal axis,

a trigger-key support having an aperture for the actuator to pass through, the trigger-key support further having a plurality of pivot-shaft supports, wherein each pivot-shaft support includes a concave surface configured to receive the cylindrical pivot shaft, and

a trigger bezel having a plurality of substantially flat surfaces positioned to constrain the pivot shaft in opposition to the plurality of pivot-shaft supports, wherein the substantially flat surfaces are located at different positions along the pivot-shaft longitudinal axis than are the pivot-shaft supports;

a switch configured to be depressed by the actuator; and

a data-acquisition device configured to actuate in response to the switch being depressed.