Abstract: A helmet demister includes a socket, a power supply device and a fan. Two ends of the socket are defined respectively with a clamping hole to fix an adsorption element through which the socket is freely adsorbed on an inner surface of a helmet lens. When defogging, a controller activates the power supply device to produce electricity and drive the fan. Then, the fan produces wind power to cause air convection. As this air convection rate is larger than a flow rate of hot air produced when a rider is breathing, a temperature in an inner space of the helmet lens is maintained at being close to a temperature of ambient environment; therefore, water molecules are not attached on a side of the lens where the temperature is lower. Moreover, as en entire structure is simple, the socket can be adsorbed on the helmet lens freely, to improve the practicability.

Abstract: The present invention discloses a helmet lens demister, also including the lens (e.g., a snow or wind goggle) if being used independently. The helmet lens demister includes primarily a socket, a power supply device, a fan and fixing devices by which the demister is fixed on a predetermined location for defogging the lens. When defogging, a controller activates the power supply device to produce electricity and drive the fan. Then, the fan produces wind power to cause air convection. Therefore, a temperature in an inner space of the helmet lens will be close to a temperature of ambient environment and a temperature and humidity on an inner side of the lens can be adjusted; therefore, water molecules will not be attached on a side of the lens close to a human body. Moreover, as an entire structure is simple, the socket can be fixed freely, to improve the practicability.

Abstract: The present invention provides a wiper device for safety helmet that comprises a helmet housing, a touch device, a drive and a wiper. When driving on a rainy day, a user's teeth occlude and come into contact with the touch device that actuates the drive through cables, thereby making the wiper oscillate on a surface of a glass plate so as to wipe rainwater off the surface of the glass plate and enhance the visibility and safety when driving on a rainy day.