Auxiliary device for calibrating aim point of firearm

1 . An auxiliary device for calibrating an aim point of a firearm, comprising: a shell, wherein the shell is internally provided with a laser emitting assembly, the laser emitting assembly emits visible light beams, one end surface of the shell is provided with a light emitting hole, one end of the shell away from the light emitting hole is provided with a limiting end, and the limiting end is used for installing and limiting the auxiliary device on a barrel of the firearm;

an outer side wall of the limiting end is provided with a first circular truncated cone inclined surface, an end portion of the limiting end is provided with a limiting mechanism, and central axes of the light emitting hole, the first frustum inclined plane and the limiting mechanism are coincident;

the laser emitting assembly comprises a laser and a circuit board, and the laser is connected with the circuit board;

an accommodating cavity is arranged in the shell, a power supply assembly is arranged in the accommodating cavity, the power supply assembly is used for supplying power to the laser, and the power supply assembly is connected with the circuit board;

the power supply assembly comprises a battery holder, a connecting piece is arranged on the battery holder, the battery holder is used for containing a battery, and the connecting piece is used for connecting the battery with the shell;

an outer side of the shell is sleeved with a battery cover, the battery cover is connected with the battery holder, and the battery cover drives the battery holder to rotate and move;

when the battery cover drives the battery holder to rotate, the connecting piece is connected with the shell;

an elastic piece is arranged in the accommodating cavity, one end of the elastic piece is connected with a lower surface of an inner wall of the accommodating cavity, and the other end of the elastic piece is abutted with the battery holder;

a jacking post is arranged in the accommodating cavity, one end of the jacking post is connected with the shell, the other end of the jacking post extends into the accommodating cavity, a lower end surface of the battery holder is provided with a through hole, and a diameter of the through hole is matched with an outer diameter of the jacking post; and

when the battery cover drives the battery holder to move, the top post is inserted into the through hole;

wherein an outer wall of the shell is provided with a first boss, and an inner wall of the battery cover is provided with a second boss; and

when the battery cover drives the battery holder to move, an end surface of the second boss is abutted against an end surface of the first boss.

2 . The auxiliary device for calibrating the aim point of the firearm according to claim 1 , wherein the limiting mechanism comprises a casing pipe and a first sealing piece, the first sealing piece is sleeved on an outer wall of the limiting end, the casing pipe is connected with one end of the limiting end away from the light emitting hole, the casing pipe is provided with a second sealing piece, and the first sealing piece and the second sealing piece are respectively coincident with the central axis of the first frustum inclined plane.

3 . The auxiliary device for calibrating the aim point of the firearm according to claim 2 , wherein the outer side wall of the limiting end is provided with a second frustum inclined plane, and an inclined plane hole adapted to the second frustum inclined plane is arranged in the casing pipe.

4 . The auxiliary device for calibrating the aim point of the firearm according to claim 1 , wherein the battery holder is provided with a clamping block, and the shell is provided with a limiting block; and

when the battery cover drives the battery holder to move, the clamping block is abutted against the limiting block.

5 . The auxiliary device for calibrating the aim point of the firearm according to claim 1 , wherein a bump is arranged on a part of the shell connected with the battery holder, and a clamping groove adapted to the bump is arranged on the battery holder; and

when the battery cover drives the battery holder to move, the bump is connected with the clamping groove.