Abstract: An electric nail gun using an air spring, the driving mechanism thereof including a working cylinder, a pneumatic cylinder, an air storage chamber, a nailing component, a lifting device, a one-way component, a latching device, a separating device and a guiding component. The nailing component has a first longitudinal edge to cooperate with the lifting device and a second longitudinal edge to cooperate with the latching device and the separating device. The first longitudinal edge has several discontinuous and protruding faces separated apart from one another and cooperating with cylindrical and protruding pins of the lifting device. The second longitudinal edge has a latching groove to cooperate with the latching device, the latching groove corresponding to a detaching section for a cam of the lifting device.

Abstract: An electric nail gun using an air spring, the driving mechanism thereof including a working cylinder, a pneumatic cylinder, an air storage chamber, a nailing component, a lifting device, a one-way component, a latching device, a separating device and a guiding component. The nailing component has a first longitudinal edge to cooperate with the lifting device and a second longitudinal edge to cooperate with the latching device and the separating device. The first longitudinal edge has several discontinuous and protruding faces separated apart from one another and cooperating with cylindrical and protruding pins of the lifting device. The second longitudinal edge has a latching groove to cooperate with the latching device, the latching groove corresponding to a detaching section for a cam of the lifting device.

Abstract: A nailing gun trigger safety device and a nailing gun provided with the same are disclosed. Said nailing gun safety device is provided on the nailing gun body and interconnects with a trigger mechanism. Said nailing gun trigger safety device includes a contact-jacking mechanism and an poking mechanism interconnected with the contact-jacking mechanism. Said contact-jacking mechanism is slidably mounted on the distal end of the nailing body. Said poking mechanism interconnects with the contact-jacking mechanism. Said nailing gun trigger safety device further includes a transmission mechanism interconnected with the trigger mechanism and said transmission mechanism interconnects with said poking mechanism and the trigger mechanism respectively. Such a mechanical structure makes the structure of the nailing gun trigger safety device simple and reduces the manufacture cost.

Abstract: An apparatus for dry distillation of oil shale, has a vibration bed with multiple layers, a gas retort, a feeding system, a feeding hole, a screen plate, a water seal tank, a discharging system, and a gas outlet. The feeding system and the feeding hole are disposed at the top of the gas retort. The screen plate is disposed on the vibration bed. The layers of the vibration bed are obliquely disposed in the gas retort. The number of layers of the vibration bed is nine. Three hot recycle gas inlets are disposed on the wall of the gas retort and respectively below the fourth layer, the fifth layer and the sixth layer of the vibration bed. A cold recycle gas inlet is disposed below the ninth layer of the vibration bed. The water seal tank and the discharging system are disposed at the bottom of the gas retort. The gas outlet is disposed at the top of the gas retort. The apparatus features a simple structure, convenient operation, low cost, and a high oil recovery and resource unitization rate.