HELMET LENS DEMISTER

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.

Description

RELATED APPLICATION

This application is a Continuation-In-Part of currently pending U.S. Pat. application Ser. No. 12/612,433 filed on Nov. 4, 2009.

BACKGROUND OF THE INVENTION

a) Field of the Invention

The present invention relates to a demister and more particularly to a helmet lens demister which utilizes air convection to balance a temperature difference, so as to prevent from attachment of water molecules.

b) Description of the Prior Art

A motorcycle has already been one of most essential vehicles for short-ranged transportation of modern people. In order to protect safety of a rider, a helmet has become one of indispensable safety equipment. Therefore, whether in a sunny or rainy day, the rider has to wear the helmet to protect his or her safety; and all of the existing helmets will be attached with a piece of safety lens to keep alien objects from hitting on the rider's face and eyes upon riding the motorcycle. However, as the lens is covered, a temperature inside the helmet will increase by hot air which is caused when the rider is breathing. At this time, when an air temperature and humidity in ambient environment are too high and the ambient temperature is lower than the temperature inside the helmet, water molecules in the air will be very easily attached on the lens, forming so-called mist. When the mist is produced on the helmet lens, a vision of the rider will be reduced, which will easily result in an accident. Accordingly, to prevent from forming the mist on the lens, a related vendor has provided a solution. Referring to FIG. 1, it shows a schematic view of a state that an anti-fogging film is coated on a helmet lens in a prior art, wherein a lens 10 of a helmet 1 is coated with a layer of anti-fogging film 12 to pave original capillary holes on the lens 10, preventing water molecules from being attached in these capillary holes; therefore, the mist will not be formed. This method can completely prevent the lens 10 from forming the mist; however, as this anti-fogging film 12 coating method will fail after a certain period of time, the anti-fogging film 12 has to be coated once after a certain period of time, in order to maintain the anti-fogging effect of the lens 10 of the helmet 1, which will be very inconvenient to the rider. As a result, there is another vendor who has utilized heating wires. Referring to FIG. 2, it shows a schematic view of a state that the heating wires are attached on a helmet lens in another prior art, wherein a heating wire 22 is provided at a fixed spacing on a lens 20 of a helmet 2. Therefore, when the mist is formed on the lens 20, the heating wires 22 are energized to conduct heat through which the lens 20 will not be fogging. In addition, there is no need to re-configure the heating wires 22 at a fixed time interval. This design provides a lot of convenience to the rider. Nevertheless, as this method of utilizing the heating wires 22 will consume more electricity when activating, if a battery is used to supply electricity, power in the battery will be depleted very quickly and thus the battery has to be replaced constantly. Therefore, the method of using the heating wires will very easily cause insufficient electricity.

Accordingly, how to solve the aforementioned issues and shortcoming of the prior arts is a direction of research and development for improvement by the present inventor and related vendors.

SUMMARY OF THE INVENTION

The present invention is a demister and more particularly to a helmet lens demister which utilizes air convection to balance a temperature difference and to adjust a temperature and humidity on an inner surface of the lens, thereby preventing from attachment of water molecules.

The primary object of the present invention is to provide a helmet lens demister which includes primarily a socket, a power supply device, a fan and fixing devices by which the demister can be fixed on a predetermined location for defogging the lens. When defogging, a controller can be used to activate the power supply device to produce electricity and drive the fan. At this time, the fan will produce wind power to form air convection. As an air convection rate is larger than a flow rate of hot air which is produced when a rider is breathing and a temperature and humidity on the inner surface of the lens can be adjusted, a temperature in an inner space of the helmet lens can be close to an ambient temperature; therefore, water molecules will not be attached on a side of the lens close to a human body. On the other hand, as an entire structure is simple, it facilitates the rider to fix the socket at a proper location freely, thereby improving the practicability.

A second object of the present invention is to provide a helmet demister which requires less electricity that there is no need to replace the battery constantly.

A third object of the present invention is to provide a helmet demister, an entire structure of which is simple and compact that the rider can easily carry.

A fourth object of the present invention is to provide a helmet demister, wherein as an entire structure is simple, a manufacturing cost is cheap to reduce a sale price.

A fifth object of the present invention is to provide a helmet demister, wherein as an air flow rate is more than three times of a respiration rate, a helmet lens can be quickly defogged and can be kept from fogging.

To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a schematic view of a state that an anti-fogging film is coated on a helmet lens in a prior art.

FIG. 2 shows a schematic view of a state that heating wires are attached on a helmet lens in another prior art.

FIG. 3 shows a three-dimensional schematic view of a demister of the present invention.

FIG. 4 shows an exploded view of the demister of the present invention.

FIG. 5 shows a schematic view of an operation to activate the demister of the present invention.

FIG. 6 shows a schematic view of a state that air flow is produced after activating the demister, according to the present invention.

FIG. 7 shows a schematic view of structures of another preferred embodiment of the present invention.

FIG. 8 shows a schematic view of a state of use of FIG. 7.

FIG. 9 shows a schematic view of structures of another preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIG. 3 and FIG. 4, it shows a three-dimensional schematic view and an exploded view, of a demister of the present invention. As shown in the drawings, the present invention is a helmet lens demister. The demister 3 comprises primarily a socket 30, a power supply device 32, a fan 34 and fixing devices 36 by which the demister 3 can be fixed on a predetermined location for defogging a lens 40 of a helmet 4. In addition, the socket 30 is provided with a controller 38 to activate the power supply device 32 to produce electricity and drive the fan 34. At this time, the fan 34 will produce wind power to cause air convection. As this air convection rate is larger than a flow rate of hot air which is formed when a rider is breathing, a temperature in an inner space of the lens 40 of the helmet 4 can be maintained at being close to a temperature of ambient environment; therefore, water molecules will not be attached on a side of the lens 40 where the temperature is lower. Besides, a location of the socket 30 where the fan 34 is provided is transfixed with a vent 39 which is connected to an air pipe 5 allowing external air to flow through.

Referring to FIG. 5 and FIG. 6, it shows a schematic view of an operation to activate the demister and a schematic view of a state that air flow is produced after activating the demister, according to the present invention. As shown in the drawings, the power supply device 32 is a battery and this method facilitates carrying the demister 3 and provides for supplying power by itself. Using the fixing devices 36, the demister 3 can be fixed at any location on the inner surface of the lens 40 and the helmet 4. In addition, the fan 34 is made to face toward the lens 40. At this time, the controller 38 is pressed down to activate the power supply device 32, producing electricity and driving the fan 34. The fan 34 will then circulate external air through the vent 39. As an air convection rate is larger than a flow rate of hot air which is formed when the rider is breathing, heat energy which is produced when the rider is breathing will be carried away by the air convection, allowing a temperature in a space of the lens 40 corresponding to the rider to be close to a temperature in ambient environment and humidity to be adjusted; therefore, water molecules on the inner side of the lens 40 will not be able to be attached on the lens 40, and no fogging will be formed. In addition, as the entire structure is simple, a rider can be convenient in fixing helmet lens demister at a proper location freely, thereby improving practicability.

Referring to FIG. 7 and FIG. 8, it shows a schematic view of structures of another preferred embodiment of the present invention, and a schematic view of a state of use of FIG. 7. As shown in the drawings, a power supply device 32a is an external circuit which is a primary power source and as the installation method has been disclosed in FIG. 6, further description is not needed. If a vent 39a on a demister 3a cannot circulate the external air, then an air pipe 5a and the vent 39a can be used and the other end of the air pipe 5a is provided in an ambient space. Thus, a fan 34a can be effectively driven to circulate cold air in the ambient environment, thereby reducing a temperature at an inner side of lens 40a and adjusting the humidity. Besides, by using the externally connected power supply device 32a, there is no need to replace a battery that a rotation speed of the fan 34a can be still maintained, allowing the defogging function to be more stable.

Referring to FIG. 9, it shows a schematic view of structures of another preferred embodiment of the present invention. As shown in the drawing, a demister 3b is applied in a full-face helmet and is assembled on a predetermined location of the helmet to achieve a defogging effect for a lens. As its operation method and air flow condition are the same as those described above, no further disclosure is needed. By this installation method, it can be clearly shown that the it is not necessary to install the demister 3b on the lens, as long as that fog on the lens can be removed.

It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.

Claims

1. A helmet lens demister comprising:

a socket, predetermined locations of which are provided with at least one fixing device;

at least one power supply device which is connected at the socket and is electrically connected with a controller; and

at least one fan which is connected at a pre-determined location of the socket and is electrically connected with the power supply device.

2. The helmet lens demister according to claim 1, wherein a location of the socket where the fan is provided is transfixed with a vent which is connected to an air pipe, allowing external air to flow through.

3. The helmet lens demister according to claim 1, wherein an air flow rate which is caused after an operation of the fan is larger than a respiration rate.

4. The helmet lens demister according to claim 1, wherein the power supply device is an external circuit.

5. The helmet lens demister according to claim 1, wherein the power supply device is a battery or solar energy.

6. The helmet lens demister according to claim 1, wherein the lens is further a snow goggle or a wind goggle, which is used independently.