Abstract: An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly, a driving assembly and a stopping assembly. The fixed assembly has a main axis. The movable assembly is configured to connect an optical element, and the movable assembly is movable relative to the fixed assembly. The driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The stopping assembly is configured to limit the movement of the movable assembly relative to the fixed assembly within a range of motion.

Abstract: A pneumatic needle-free injection device restores pressured air in a pressure room to deliver high pressure air instantaneously, so as to inject a dose subcutaneously, intradermally, and intramuscularly, accelerating an absorption process of skins. The device can be further linked to a high-pressured air container for portable usage.

Abstract: A pneumatic needle-free injection device restores pressured air in a pressure room to deliver high pressure air instantaneously, so as to inject the dose subcutaneously, intradermally and intramuscularly, accelerating absorption process of skins. The device can be further linked to a high-pressured air container for portable usage.

Abstract: A pneumatic firing device includes a rear section engaging a cylinder, a solenoid valve engaging the rear section from under, an adjusting element disposed inside the rear section, a piston disposed inside the cylinder to form a first chamber and a second chamber, an airflow guiding element engaging the cylinder at a front thereof, a moving rod having a tail end engaging the piston and a front end stretching through the cylinder into the airflow guiding element for operation control of the airflow guiding element, and a front section engaging a front of the airflow guiding element and having a plurality of passage to displace the delivery tube through a hole thereof.

Abstract: A pneumatic firing device includes a rear section engaging a cylinder, a solenoid valve engaging the rear section from under, an adjusting element disposed inside the rear section, a piston disposed inside the cylinder to form a first chamber and a second chamber, an airflow guiding element engaging the cylinder at a front thereof, a moving rod having a tail end engaging the piston and a front end stretching through the cylinder into the airflow guiding element for operation control of the airflow guiding element, and a front section engaging a front of the airflow guiding element and having a plurality of passage to displace the delivery tube through a hole thereof.

Abstract: A pneumatic firing device includes a rear section engaging a cylinder, a solenoid valve engaging the rear section from under, an adjusting element disposed inside the rear section, a piston disposed inside the cylinder to form a first chamber and a second chamber, an airflow guiding element engaging the cylinder at the front thereof, a moving rod having a tail end engaging the piston and a front end stretching through the cylinder into the airflow guiding element for controlling the operation of the airflow guiding element, and a front section engaging the front of the airflow guiding element. The solenoid valve holds control of the operation of a pressure release channel to change the pressure difference between the first and second chamber, making the pressured air entering a first passage from a first guiding hole of the airflow guiding element, pushing the delivery tube to a firing position, flowing into a second passage from a second guiding hole, and then firing a pellet with strong airflow.