Firearm safety mechanisms, visual safety indicators, and related techniques

1. A safety system embedded inside a firearm comprising:

a safety mechanism having a locked position that prevents discharging of the firearm and an unlocked position that permits discharging of the firearm, the safety mechanism comprising:

a cam;

a motor mechanically coupled to the cam, the motor configured to rotate the cam; and

a trigger bar stop comprising a corner, the trigger bar stop having a first position in which the trigger bar stop prevents discharging of the firearm and a second position in which the trigger bar stop permits discharging of the firearm, wherein the corner fits within a recess of the cam when the trigger bar stop is in the first position and the corner is outside of the cam when the trigger bar stop is in the second position;

a wireless communication circuit configured to communicate with at least one device;

a processor configured to:

receive, through the wireless communication circuit from the at least one device, an unlock signal; and

cause the safety mechanism to change from the locked position to the unlocked position in response to receiving the unlock signal at least in part by causing the cam to move the trigger bar stop between the first position and the second position.

2. The safety system of claim 1 , wherein the processor is further configured to:

receive, through the wireless communication circuit from the at least one device, a lock signal; and

cause the safety mechanism to change from the unlocked position to the locked position in response to receiving the lock signal at least in part by causing the cam to move the trigger bar stop between the second position and the first position.

3. The safety system of claim 2 , wherein the processor is further configured to:

after causing the safety mechanism to change from the unlocked position to the locked position:

transmit, using the wireless communication circuit to the at least one device, a signal indicating that the safety mechanism is in the locked position.

4. The safety system of claim 1 , wherein the processor is further configured to:

after causing the safety mechanism to change from the locked position to the unlocked position:

transmit, using the wireless communication circuit to the at least one device, a signal indicating that the safety mechanism is in the unlocked position.

5. The safety system of claim 1 , further comprising:

a status indicator indicating a current position of the safety mechanism, wherein the status indicator has a first state indicating that the safety mechanism is in the locked position and a second state indicating that the safety mechanism is in the unlocked position.

6. The safety system of claim 5 , wherein the processor is further configured to:

cause the status indicator to change from the first state to the second state after causing the safety mechanism to change from the locked position to the unlocked position; and

cause the status indicator to change from the second state to the first state after causing the safety mechanism to change from the unlocked position to the locked position.

7. The safety system of claim 5 , wherein the status indicator comprises a light source, the light source configured to emit light of a first color in the first state and emit light of a second color in the second state.

8. The safety system of claim 1 , wherein the unlock signal indicates that a user has successfully been authenticated by the at least one device.

9. The safety system of claim 1 , wherein the at least one device is a smartphone or a smartwatch.

10. The safety system of claim 1 , wherein the unlock signal comprises a Bluetooth signal and/or a near-field communication (NFC) signal.

11. The safety system of claim 1 , wherein the firearm comprises a trigger bar, and the safety mechanism is configured to prevent actuation of the trigger bar when the safety mechanism is in the locked position.

12. The safety system of claim 1 , further comprising:

a battery; and

a wireless charging circuit configured to make a wireless electrical connection with a charger to charge the battery.

13. The safety system of claim 12 , wherein the charger comprises an inductive charger, and the wireless charging circuit comprises an inductive charging circuit configured to make an electrical connection with the inductive charger.

14. The safety system of claim 13 , wherein the battery is charged by an electrical current generated by the inductive charging circuit through electromagnetic induction.

15. The safety system of claim 13 , wherein the inductive charging circuit is located on a base of a handle of the firearm.

16. The safety system of claim 13 , wherein the inductive charging circuit is located on a side surface of a handle of the firearm.

17. A safety system of claim 13 , wherein the charger comprises:

at least one dock for placement of the firearm;

at least one inductive element configured to make an electrical connection with the inductive charging circuit of the safety system; and

at least one electrical charging circuit configured to transmit electricity to the safety system when the at least one inductive element makes an electrical connection with the inductive charging circuit of the safety system.

18. The safety system of claim 17 , wherein the at least one dock comprises a plurality of docks for placement of a plurality of firearms, and the at least one electrical charging circuit is configured to transmit electricity to safety systems of the plurality of firearms when the at least one inductive element makes an electrical connection with inductive charging circuits of the safety systems of the plurality of firearms.

19. The safety system of claim 17 , wherein the at least one inductive element makes an electrical connection with the inductive charging circuit of the safety system when a side of the firearm is placed on the charger.

20. The safety system of claim 1 , wherein the processor is configured to:

receive, through the wireless communication circuit from the at least one device, a configuration signal indicative of whether to use a pin pad on the firearm, a biometric sensor on the firearm, or both, is additionally required to unlock the firearm; and

in response to the configuration signal, configure the firearm so that the safety mechanism only changes from the locked position to the unlocked position in response to receiving the unlock signal only after also receiving correct pin pad information from the pin pad on the firearm, biometric sensor information from the biometric sensor on the firearm, or both.

21. The safety system of claim 1 , further comprising:

one or more buttons disposed on a side of a grip of a handle of the firearm, such that the one or more buttons can be accessed by an operator's hand when the operator grasps the handle;

wherein the processor is further configured to:

receive input data from the one or more buttons indicative of an input code;

determine whether the input code matches a stored code; and

after determining that the input code matches the stored code, cause the safety mechanism to change from the locked position to the unlocked position.

22. A mobile device for communication with a safety system embedded in a firearm, the safety system configured to lock the firearm to prevent firing of the firearm and unlock the firearm to allow discharging of the firearm, the safety system comprising a cam, a motor mechanically coupled to the cam and configured to rotate the cam, and a trigger bar stop comprising a corner, the trigger bar stop having a first position in which the trigger bar stop prevents discharging of the firearm and a second position in which the trigger bar stop permits discharging of the firearm, the corner fitting within a recess of the cam when the trigger bar stop is in the first position and the corner being outside of the cam when the trigger bar stop is in the second position, the mobile device comprising:

a wireless communication circuit;

a display; and

a processor configured to:

receive, through an input interface of the mobile device, authentication information from a user of the mobile device;

determine, based on the authentication information, whether the user has permission to discharge the firearm;

transmit, using the wireless communication circuit to the safety system, a signal that causes the safety system to unlock the firearm to allow discharging of the firearm when it is determined that the user has permission to discharge the firearm, wherein the signal causes the cam to move the trigger bar stop between the first position and the second position;

receive, using the wireless communication circuit from the safety system, a signal indicating that the safety system has unlocked the firearm; and

generate, in the display, a GUI indicating that the firearm is unlocked in response to receiving the signal indicating that the safety system has unlocked the firearm.

23. A mobile device for communication with a safety system embedded in a firearm, the safety system configured to lock the firearm to prevent firing of the firearm and unlock the firearm to allow discharging of the firearm, the safety system comprising a cam, a motor mechanically coupled to the cam and configured to rotate the cam, and a trigger bar stop comprising a corner, the trigger bar stop having a first position in which the trigger bar stop prevents discharging of the firearm and a second position in which the trigger bar stop permits discharging of the firearm, the corner fitting within a recess of the cam when the trigger bar stop is in the first position and the corner being outside of the cam when the trigger bar stop is in the second position, the mobile device comprising:

a wireless communication circuit;

a display; and

a processor configured to:

receive, through an input interface of the mobile device, authentication information from a user of the mobile device;

determine, based on the authentication information, whether the user has permission to discharge the firearm; and

transmit, using the wireless communication circuit to the safety system, a signal that causes the safety system to unlock the firearm to allow discharging of the firearm when it is determined that the user has permission to discharge the firearm, wherein the signal causes the cam to move the trigger bar stop between the first position and the second position.

24. The mobile device of claim 23 , wherein the processor is further configured to:

receive, through the input interface, user input indicating a command to lock the firearm; and

transmit, using the wireless communication circuit to the safety system, a signal that causes the safety system to lock the firearm to prevent discharging of the firearm, wherein the signal causes the cam to move the trigger bar stop between the second position and the first position.

25. The mobile device of claim 23 , wherein the signal comprises a Bluetooth signal and/or an NFC signal.

26. The mobile device of claim 23 , wherein the processor is further configured to:

receive, through the input interface, user input indicating a configuration to require use of a pin pad on the firearm, a biometric sensor on the firearm, or both, to lock the firearm; and

transmit, using the wireless communication circuit to the safety system, a configuration signal that causes the safety system to change from the first position to the second position in response to receiving the signal only after also receiving correct pin pad information from the pin pad on the firearm, biometric sensor information from the biometric sensor on the firearm, or both.