Abstract: An air curtain-assisted exhaust method and a device thereof are provided. Air curtain generators are disposed on a worktable to enclose an encircled area in the worktable. A receiving hood is disposed above the worktable, wherein the vertical lower part of the outer edge of the receiving hood completely covers the encircled area. Then, the air curtain generators are started to blow out air curtains toward an opening of the receiving hood, and the receiving hood is started to suck an air flow. A shielding space is defined by the air flow sucked by the receiving hood and the air curtains, so that the air curtains may guide a smoke generated inside the shielding space to the receiving hood to be exhausted, thereby achieving the effect of auxiliary exhaust, and may restrict the smoke in the shielding space to prevent the smoke from diffusing laterally.

Abstract: A vehicle lighting device is mounted in a bicycle. The lighting device includes a cantilever, a light-emitting lamp, and a power generating unit. The cantilever is fixed on a frame of the bicycle, so as to support the power generating unit to urge the power generating unit against a wheel of the bicycle constantly. The power generating unit includes an induction coil winding, a magnetic rotor, and a roller. The induction coil winding is wound around a winding axis. A rotating axis of the magnetic rotor is perpendicular to the winding axis. When wheels of the bicycle rotate, the roller and the magnetic rotor are driven to rotate relative to the induction coil winding, such that the induction coil winding generates an inductive electric power, which is supplied to the light-emitting lamp. Thus, a low-cost and labor-saving vehicle lighting device is developed.

Abstract: An auxiliary exhaust structure and method therefor are used to exhaust a pollution source of a workstation. The auxiliary exhaust structure includes an exhaust hood and an air feeder. The exhaust hood disposed corresponding to the workstation has a suction port for sucking the pollution source and a deflector extending along the periphery of the suction port for guiding the pollution source. The air feeder generates air flows flowing along the deflector towards the suction port for guiding the pollution source. Therefore, during the exhausting of the pollution source, the gathering effect of the pollution source flowing to the exhaust hood is enhanced and thereby the pollution source is easier to be trapped.

Abstract: An air curtain-assisted exhaust method and a device thereof are provided. Air curtain generators are disposed on a worktable to enclose an encircled area in the worktable. A receiving hood is disposed above the worktable, wherein the vertical lower part of the outer edge of the receiving hood completely covers the encircled area. Then, the air curtain generators are started to blow out air curtains toward an opening of the receiving hood, and the receiving hood is started to suck an air flow. A shielding space is defined by the air flow sucked by the receiving hood and the air curtains, so that the air curtains may guide a smoke generated inside the shielding space to the receiving hood to be exhausted, thereby achieving the effect of auxiliary exhaust, and may restrict the smoke in the shielding space to prevent the smoke from diffusing laterally.

Abstract: A retractable safety syringe includes primarily a barrel, a seat, and a push rod, wherein a tubular exit is located at an end of the barrel, a bore is located at an inner rim of bottom of exit, a thin breakage part is located at a periphery of the end, and a groove is located on a surface of barrel close to the end for latching and fixing a cover. A bolt is located at a top end of the push rod, so as to retract the push rod by locking the bolt of push rod into the bore at the inner rim of exit of barrel, after accomplishing an injection with the syringe, thereby breaking the breakage part at the periphery of barrel from a stretching force and retracting a needle into the barrel, in order to prevent the used syringe from being recycled.

Abstract: A disposable safety syringe structure includes a barrel, a needle seat, a plunger, and a protective cover. A circumferentially surrounded thin broken portion is disposed on a periphery of an end portion of the barrel, and a circular groove is disposed on the end portion of the barrel thereby fastening the protective cover. In addition, a vertical cutter is disposed on a bottom end of the protective cover, and a fastener is disposed on a top end of the plunger, such that the syringe can be hooked onto an opening of the outlet of the barrel by means of the fastener of the plunger after injection. When the protective cover is turned, the cutter cuts off the broken portion such that the needle head is retracted to the barrel and the barrel can be completely destroyed in order to prevent it from being recycled and reused.

Abstract: An automatic visor control device for a helmet including a movable visor pivotally fixed onto either side of the helmet and covering a window opening in the front side of the helmet, a power device disposed on one side of the helmet, and a wind-pressure switch provided in the lower portion of the front side of the helmet. By means of the wearer's blowing, the power device is activated to cause the visor to move up or down.