Abstract: A gas detection and cleaning system for a vehicle is disclosed and includes an external modular base, a gas detection module and a cleaning device. The gas detection module is connected to a first external connection port of the external modular base to detect a gas in the vehicle and output the information datum. The information datum is transmitted through the first external connection port to a driving and controlling module of the external modular base, processed and converted into an actuation information datum for being externally outputted through a second external connection port of the external modular base. The cleaning device is connected with the second external connection port through an external port to receive the actuation information datum outputted from the second external connection port to actuate or close the cleaning device.

Abstract: A fan is provided herein, including a housing, a hub, and a plurality of blades. The housing includes a top case and a bottom case. The hub is rotatably disposed between the top case and the bottom case in an axial direction. The blades extend from the hub in a radial direction, located between the top case and the bottom case. Each of the blades has a proximal end and a distal end. The proximal end is connected to the hub. The distal end is opposite from the proximal end, located at the other side of the blade, having at least one recessed portion. Each of the recessed portions form a passage for air.

Abstract: An automatic clutch type chain pulling mechanism for a motor rolling door for releasing the brake and winding up the door curtain by pulling the chain during electricity cutoff. The chain pulling mechanism is enclosed in a housing and is provided on the rotating shaft of the motor from the outside end inward with a drive block fixed on the rotating shaft of the motor which forms along its circumference a plurality of lugs protruding radially outward, an intermediate disk having an elongated radial slot and formed with a raised circular flange on its circumference with a friction clamping ring inserted within the inner surface of the flange, and a releasing rod mechanism. The releasing rod mechanism includes a brake releasing rod with one end fixed with a pin inserted into the elongated slot and the other end pivoted and having a pair of wing plates inclined upward fixed on the pivoted end for pushing an intermediate lever.

Abstract: An apparatus for preventing a motor rolling door from falling includes a wedge shaped sliding plate located at one side of a driven sprocket, which is biased away from the driven sprocket by means of two actuating rods forced by two springs. Two rollers at the outer ends of two actuating rods push against the inner surfaces of the upper and lower stringers of the drive chain to keep the sliding plate away from the driven sprocket. When the drive chain is broken, the two actuating rods extend outward due to the action of the springs, and bias the wedge sliding plate toward the driven sprocket to engage with the driven sprocket, so that the rolling door is prevented from falling by its own weight.

Abstract: A bi-directional clutch type chain pulling device for rolling doors for releasing the brake and rolling the door up by pulling the chain at an arbitrary direction has a chain sprocket which can be pulled by external force and which is pivoted thereon with a spring acted triggering plate, the sides of which are formed with a pair of branch legs and a projected actuating pin which is secured at an intermediate portion. A linkage pin is inserted into the rotating shaft and projects out. An intermediate disk has radially an elongate slide groove and has in the intermediate portion a cylinder having an inner hole, on the inner surface of the hole being provided with a friction ring which can be actuated via the actuating pin.