Trigger structure for switching one shoot mode or repeat shoot mode

1. A trigger structure for switching one shoot mode or repeat shoot mode comprising:

a trigger member, a top of the trigger member pivoted on a nail gun, a receiving space defined in the trigger member and extending to a bottom of the trigger member, a recess laterally defined on the trigger member, the trigger member having a first pivotal hole defined laterally and opposed to the recess, the trigger member having a second pivotal hole defined therethrough, the first pivotal hole and the second pivotal hole communicated with the receiving space, two protrusions extended from two opposite inner corners of the recess; and

a switching member assembled into the receiving space, the switching member further comprising:

a pivotal member having two pivotal portions at one end thereof, a connecting hole defined at another end of the pivotal member and corresponding to the first pivotal hole;

an adjusting member being assembled to the trigger member by passing through the recess, the first pivotal hole and the connecting hole, a spring placed on the adjusting member and located between the pivotal member and the trigger member; and

a trigger plate having a pivotal protrusion which is received between the two pivotal portions, a fixing rod passing through the second pivotal hole, the two pivotal portions and the pivotal protrusion;

thereby when the adjusting member is received into the recess, the trigger plate is at a first position so that the trigger structure is under the repeat shoot mode; when the adjusting member is pushed from the first pivotal hole to the recess, the adjusting member is moved out of the recess and the adjusting member drives the pivotal member and the trigger plate to axially move along the fixing rod simultaneously; thereafter the adjusting member is rotated until the adjusting member is above the two protrusions; after the spring is recovering, the adjusting member is abutted against the two protrusions and the trigger plate is also positioned at a second position so that the trigger structure is under the one shoot mode.

2. The trigger structure for switching one shoot mode or repeat shoot mode as claimed in claim 1 , wherein an annular groove is defined around the connecting hole on the pivotal member, the spring being resisted against the annular groove.

3. The trigger structure for switching one shoot mode or repeat shoot mode as claimed in claim 1 , wherein the adjusting member has a first cylindrical rod, one end of the first cylindrical rod corresponding to the recess, another end of the first cylindrical rod connected to a head portion, the head portion further comprising a round portion and two tip portions, the two tip portions extended from the round portion along a diameter of the round portion.

4. The trigger structure for switching one shoot mode or repeat shoot mode as claimed in claim 3 , wherein two protrusions are extended from two opposite inner corners of the recess, the protrusion formed as a round corner so that the two tip portions are abutted against the two protrusions when the trigger structure is under one shoot mode.

5. The trigger structure for switching one shoot mode or repeat shoot mode as claimed in claim 3 , wherein a fixing member is assembled to the one end of the first cylindrical rod, the fixing member having a second cylindrical rod and a third cylindrical rod, the diameter of the second cylindrical rod smaller than the diameter of the first pivotal hole, the diameter of the second cylindrical rod larger than the diameter of the third cylindrical rod and the diameter of the connecting hole.

6. The trigger structure for switching one shoot mode or repeat shoot mode as claimed in claim 3 , wherein the diameter of the fixing rod is smaller than the diameter of the first cylindrical rod.

7. The trigger structure for switching one shoot mode or repeat shoot mode as claimed in claim 3 , wherein the fixing member is pressed to make the head portion of the adjusting member move out of the recess and the head portion is rotated to make the tip portions of the head portion lock above the recess, the trigger plate is positioned at a third position so that the trigger structure cannot be shot and the trigger structure is under a safe mode.

8. The trigger structure for switching one shoot mode or repeat shoot mode as claimed in claim 1 , wherein the receiving space of the trigger member has a first room for receiving the movable trigger plate and a second room for receiving the pivotal member, the adjusting member and the spring, the first room larger than the second room, the second room communicated with the first room.

9. The trigger structure for switching one shoot mode or repeat shoot mode as claimed in claim 1 , wherein three marks are labeled on the trigger member near the recess, the marks labeling one shoot mode, repeat shoot mode and safe mode for correctly switching the trigger structure.

10. The trigger structure for switching one shoot mode or repeat shoot mode as claimed in claim 1 , wherein the fixing rod passing through the second pivotal hole is parallel to the adjusting member.