Actuating mechanism of an air gun

1. An actuating mechanism installed in a mount inside a gun body of an air gun and covered by a slide of said air gun, the actuating mechanism comprising:

a hammer pivoted to a rear side of said mount;

a front pivot transversely mounted into said mount near a front side of said mount;

a rear pivot transversely mounted into said mount between said front pivot and said hammer, and spaced behind said front pivot at a distance;

a hook member pivotally mounted on said rear pivot inside said mount, said hook member having a rearwardly directed hooked portion engaging with said hammer;

a movable block mounted on said front pivot and said rear pivot, said movable block having a front longitudinally elongated through hole for the passing of said first pivot and a rear longitudinally elongated through hole for the passing of said rear pivot with a first stop edge and a second stop edge selectively forced into engagement with said front pivot and a rear butt contacting said hammer; and

a spring member stopped between said movable block and said rear pivot;

wherein when the user moves said slide to a rear side of said gun body, said rear butt of said movable block is forced downwards by said slide, said movable block is moved to compress said spring member and to force said first stop edge into engagement with said front pivot, and said hook member is forced to turn said hammer backwardly downwards to a hammering position; when the user triggered said air gun, said hammer is disengaged from said hook member to strike said rear butt of said movable block, and said movable block is returned by said spring member to shift said first stop edge away from said front pivot and said second stop edge into engagement with said front pivot.

2. The actuating mechanism as claimed in claim 1 , wherein said first stop edge and said second stop edge are respectively forced in said front through hole of said movable block at different elevations.

3. The actuating mechanism as claimed in claim 2 , wherein said movable block is pivotally provided above said hook member.

4. The actuating mechanism as claimed in claim 3 , wherein said hook member has a top recess adapted to accommodate said movable block.

5. The actuating mechanism as claimed in claim 2 , wherein said spring member is mounted in said rear through hole of said movable block and stopped between a part of said movable block and a periphery of said rear pivot.

6. The actuating mechanism as claimed in claim 2 , wherein said hook member has a bottom part forming said hooked portion.

7. The actuating mechanism as claimed in claim 2 , further comprising a clamping plate pivotally mounted on said rear pivot and set between said hook member and said gun body, said clamping plate having a protruding block adapted to move said hook member away from said hammer each time the user triggers said air gun.

8. The actuating mechanism as claimed in claim 2 , wherein when said front pivot is stopped at the second stop edge of said movable block, said spring member is compressed; when said rear butt of said movable block is forced downwards, said spring member is released to return said movable block.

9. The actuating mechanism as claimed in claim 2 , wherein said front longitudinally elongated through hole of said movable block, which receives said front pivot and defines said first stop edge and said second stop edge, is in communication with said rear longitudinally elongated through hole, which receives said rear pivot, thereby forming a sliding slot encompassing both said front pivot and said rear pivot.

10. An actuating mechanism installed in a mount inside a gun body of an air gun and covered by a slide of said air gun, the actuating mechanism comprising:

a hammer pivoted to a rear side of said mount;

a front pivot transversely mounted into said mount near a front side of said mount;

a rear pivot transversely mounted into said mount between said front pivot and said hammer, and spaced behind said front pivot at a distance;

a hook member pivotally mounted on said rear pivot inside said mount, said hook member having a rearwardly directed hooked portion engaging with said hammer;

a movable block mounted on said front pivot and said rear pivot, said movable block having a front longitudinally elongated through hole for the passing of said first pivot and a rear longitudinally elongated through hole for the passing of said rear pivot, with a first stop edge and a second stop edge selectively forced into engagement with said front pivot, and a rear butt contacting said hammer; and

a spring member stopped between said movable block and said rear pivot;

wherein when the user moves said slide to a rear side of said gun body, said rear butt of said movable block is forced downwards by said slide, said movable block is moved to compress said spring member and to force said first stop edge in to engagement with said front pivot, and said hook member is forced to turn said hammer backwardly downwards to a hammering position; when the user triggered said air gun, said hammer is disengaged from said hook member to strike said rear butt of said movable block, and said movable block is returned by said spring member to shift said first stop edge away from said front pivot and said second stop edge into engagement with said front pivot; and

wherein said first stop edge and said second stop edge are respectively forced in said front through hole of said movable block at different elevations; and

said movable block is pivotally provided above said hook member

and said hook member has a top recess adapted to accommodate said movable block; and

said spring member is mounted in said rear through hole of said movable block and stopped between a part of said movable block and a periphery of said rear pivot;

and said hook member has a bottom part forming said hooked portion;

further comprising a torsional spring mounted on said rear pivot and stopped between said gun body and a part of said hook member.