Abstract: A firing pin assembly of a nail gun and a bonding method thereof are provided. The firing pin assembly includes a firing pin body and a firing pin head made of a material having a hardness greater than that of the firing pin body. The firing pin head has a first end and a second end. The first end is made of a material having a density lower than that of the second end. The first end and the front end face of the firing pin body are preheated to a set temperature. The top of the second end is pressed toward the front end face of the firing pin body for an appropriate bonding time, so that the material particles of the firing pin body are dissociated and fused into the first end of the firing pin head to form the firing pin assembly.

Abstract: A firing pin assembly of a nail gun and a bonding method thereof are provided. The firing pin assembly includes a firing pin body and a firing pin head made of a material having a hardness greater than that of the firing pin body. The firing pin head has a first end and a second end. The first end is made of a material having a density lower than that of the second end. The first end and the front end face of the firing pin body are preheated to a set temperature. The top of the second end is pressed toward the front end face of the firing pin body for an appropriate bonding time, so that the material particles of the firing pin body are dissociated and fused into the first end of the firing pin head to form the firing pin assembly.

Abstract: A firing pin assembly of a nail gun and a bonding method thereof are provided. The firing pin assembly includes a firing pin body and a firing pin head made of a material having a hardness greater than that of the firing pin body. The firing pin head has a first end and a second end. The first end is made of a material having a density lower than that of the second end. The first end and the front end face of the firing pin body are preheated to a set temperature. The top of the second end is pressed toward the front end face of the firing pin body for an appropriate bonding time, so that the material particles of the firing pin body are dissociated and fused into the first end of the firing pin head to form the firing pin assembly.

Abstract: A ratchet wrench includes a main body, a ratchet, two detents, two elastic members, and a switch knob. The strength of the material of the detents is greater than that of the material of the ratchet. During the process of operating the ratchet wrench, if the applied force is greater than the limit torsional force of the meshing portion between the teeth of the ratchet and the toothed portion of the detent to damage the teeth of the ratchet, the toothed portion of the detent will be instantly engaged with the intact teeth of the ratchet, located behind the damaged teeth, to be positioned again, thereby ensuring the safety of the operator.

Abstract: A firing pin assembly of a nail gun and a bonding method thereof are provided. The firing pin assembly includes a firing pin body and a firing pin head made of a material having a hardness greater than that of the firing pin body. The firing pin head has a first end and a second end. The first end is made of a material having a density lower than that of the second end. The first end and the front end face of the firing pin body are preheated to a set temperature. The top of the second end is pressed toward the front end face of the firing pin body for an appropriate bonding time, so that the material particles of the firing pin body are dissociated and fused into the first end of the firing pin head to form the firing pin assembly.