Firearm safety mechanisms, visual safety indicators, and related techniques
The techniques described herein relate to methods and apparatus for firearm safety mechanisms, visual safety indicators, and related techniques. A firearm includes a handle comprising one or more buttons disposed at least partially within a surface of the handle, such that the one or more buttons can be in contact with an operator's hand when the operator grasps the handle; a safety mechanism in mechanical communication with the trigger. The safety mechanism comprises: a first position that blocks actuation of the trigger; and a second position that does not block actuation of the trigger; and at least one processor configured to: upon determining an input code matches a stored code, transmits a signal to the safety mechanism to change the safety mechanism from the first position to the second position so that the firearm can be fired by the operator.
1. A safety system for a firearm, the safety system comprising:
a safety mechanism having a locked position that prevents discharging of the firearm and an unlocked position that allows 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 fingerprint sensor located on an outer surface of the firearm, the fingerprint sensor configured to generate a fingerprint scan of a finger contacting the fingerprint sensor;
a light source located proximate the fingerprint sensor; and
an electrical circuit configured to:
cause the safety mechanism to change between the locked position and the unlocked position based on a first signal from the fingerprint sensor indicating detection of the fingerprint of a user permitted to use the firearm 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 light source emits light without requiring a power source.
3. The safety system of claim 2 , wherein the light source comprises a luminescent material.
4. The safety system of claim 3 , wherein the luminescent material comprises a phosphor that emits absorbed energy as light.
5. The safety system of claim 1 , wherein the light source indicates whether the safety mechanism is in the locked position or the unlocked position.
6. The safety system of claim 5 , wherein the light source is configured to emit light of a first color when the safety mechanism is in the locked position and emit light of a second color when the safety mechanism is in the unlocked position.
7. The safety system of claim 1 , wherein the light source is a multicolor light-emitting diode (LED).
8. The safety system of claim 1 , further comprising a processor configured to:
receive 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.
9. The safety system of claim 8 , wherein the processor is further configured to:
receive 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.
10. The safety system of claim 9 , further comprising:
a wireless communication circuit configured to receive the lock signal and/or the unlock signal from at least one device.
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:
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 a user's hand when the operator grasps the handle;
wherein the electrical circuit comprises a processor 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.
13. The safety system of claim 1 , further comprising:
a battery; and
a charging circuit configured to make an electrical connection with a charger to charge the battery.
14. The safety system of claim 1 , wherein the light source is configured to emit light along an outer boundary surrounding the fingerprint sensor.
15. A firearm comprising:
a safety mechanism having a locked position that prevents discharging of the firearm and an unlocked position that allows 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 fingerprint sensor located on an outer surface of the firearm, the fingerprint sensor configured to generate a fingerprint scan of a finger contacting the fingerprint sensor;
a light source located proximate the fingerprint sensor, wherein the light source is configured to emit light along an outer boundary surrounding the fingerprint sensor; and
an electrical circuit configured to cause the safety mechanism to move between the locked position and the unlocked position at least in part by causing the cam to move the trigger bar stop between the first position and the second position.
16. A firearm comprising:
a safety mechanism having a locked position that prevents discharging of the firearm and an unlocked position that allows 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 fingerprint sensor located on an outer surface of the firearm, the fingerprint sensor configured to generate a fingerprint scan of a finger contacting the fingerprint sensor;
a light source located proximate the fingerprint sensor; and
an electrical circuit configured to cause the safety mechanism to move between the locked position and the unlocked position at least in part by causing the cam to move the trigger bar stop between the first position and the second position.
17. The firearm of claim 16 , wherein the light source emits light without requiring a power source.
18. The firearm of claim 17 , wherein the light source comprises a luminescent material.
19. The firearm of claim 16 , wherein the light source is a light-emitting diode (LED).
20. The firearm of claim 16 , wherein the light source is configured to emit light along an outer boundary surrounding the fingerprint sensor.