JP3075183U - Helmet cooler - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To significantly reduce noise in a helmet even when using a turbine blade for blowing to increase the amount of blowing. A blower is provided separately from a helmet. The blower 4 is attached to the work belt 3 of the wearer 2. The cooling air generated by the blowing means 4 is sent to a blowing tube 5
To the helmet 6 to cool the inside of the helmet 6. In order to increase the air volume, the air blowing means 4 is provided with a turbine blade for air blowing. Affixing lead foil to the inner surface of the case where the turbine blades for air are stored reduces noise. The blower tube 5 is formed of a closed cell foam of synthetic resin or synthetic rubber, and suppresses noise transmitted from the blower 4 to the helmet 6.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a helmet cooler that cools the inside of a helmet by cooling air from a blowing mechanism, and more particularly to a helmet cooler that can significantly reduce noise.

[0002]

[Prior art]

 Generally, in the case of safety work helmets or helmets used for motorcycles, since there is not enough air flow through the head, especially in summer, the temperature and humidity of the head suddenly rise and physical strength may decrease. There is a problem in that the patient may feel ill and may have a mentally adverse effect, and may also cause a decrease in attention and work efficiency.

[0003] Therefore, conventionally, a helmet is modified to incorporate a ventilation mechanism into the helmet, or a small ventilation mechanism is attached to the edge of the helmet, for example, and a helmet cooler is attached to the helmet.

[0004]

[Problems to be solved by the invention]

 Among the conventional helmet coolers, the former, which modifies the helmet, has a problem that modification of the helmet is prohibited for safety and security, so it must be newly approved and cannot be applied to existing helmets. In addition, the latter, in which a ventilation mechanism is installed after the helmet, has a problem in that the amount of ventilation is so small that a cooling effect can hardly be expected under hot weather.

In addition, the conventional helmet coolers have a structure in which a ventilation mechanism is directly attached to the helmet, so that the helmet becomes very heavy, and noise from the ventilation mechanism is directly reflected on the helmet and becomes extremely noisy. There is a problem that normal work cannot be performed. In addition, since the vibration of the blower mechanism is transmitted directly to the wearer's head, there is a problem that the wearability is extremely poor.

[0006] In view of the above, some proposals have been made to separate the blowing mechanism and the helmet, or to use a refrigerator to blow cold air. The latter, which requires a large compressor, is unsuitable for portable use, and the former, in which the helmet is separated from the helmet, reduces the noise compared to the conventional one, but increases the air volume. Therefore, when using turbine blades for ventilation, the noise generated by the ventilation mechanism is transmitted to the helmet through the ventilation tube, and the wearability is not always good.

[0007] The present invention has been made in view of such a situation, and can significantly reduce the noise amount in the helmet even when the air flow is increased by using the air turbine blades. The purpose is to provide a helmet cooler.

[0008] Another object of the present invention is to provide a helmet cooler capable of easily obtaining a material and obtaining a blower tube having excellent workability.

Another object of the present invention is to provide a helmet cooler that can significantly reduce the amount of noise generated by a blowing mechanism.

[0010] Another object of the present invention is to provide a helmet cooler that can suppress noise leakage to the outside of the case and is easy to carry.

[0011] Still another object of the present invention is to provide a helmet cooler capable of easily obtaining an air volume that meets a wearer's requirement.

[0012]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a blower mechanism having a turbine blade for blower, and a blower tube for guiding cooling air from the blower mechanism to a helmet, making the blower tube soundproof, flexible and lightweight. It is characterized in that it is made of a simple material. As a result, a blower tube with a large noise attenuation effect can be obtained, and even when turbine blades for blowing are used to increase the amount of blown air, the amount of noise at Helmet can be significantly reduced. Becomes

The present invention is also characterized in that the blower tube is formed of a closed cell foam of synthetic resin or synthetic rubber. As a result, it becomes possible to obtain a blower tube which is easily available and has excellent workability.

According to the present invention, the blower mechanism comprises a case, a blower turbine blade and a drive motor built in the case, and at least one of the outer surface and the inner surface of the case has a lead foil. Is provided. This makes it possible to effectively reduce the amount of noise generated by the blower mechanism, and since only the mechanism that generates noise is housed in the case, the case can be made smaller and lead-free. It is possible to reduce the weight by reducing the amount of foil used.

[0015] The present invention is also characterized in that the case is housed in an outer case containing a power supply, and the outer case can be attached to a belt of a wearer. This makes it possible to suppress noise leakage to the outside of the case, and it is easy to carry.

The present invention is further characterized in that the outer case is provided with a switching means for switching the blowing amount of the blowing mechanism to a plurality of stages. As a result, it is possible to easily obtain an air volume that meets the requirements of the wearer.

[0017]

[Embodiment of the invention]

 Hereinafter, the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a helmet cooler according to an embodiment of the present invention. As shown in FIGS. 1 and 2, the helmet cooler 1 is detachable from a work belt 3 of a wearer 2. The cooling air generated by the air blowing means 4 is guided to the helmet 6 through the air blowing tube 5 and is discharged into the helmet 6 so that the head of the wearer 2 is moved. It is designed to cool.

As shown in FIG. 3 to FIG. 5, the blower means 4 includes a blower mechanism 7 as a source of cooling air, and a case-like outer case with a lid for accommodating the blower mechanism 7 together with a power supply 8. 9, and the blower tube 5 is connected to a blower outlet pipe 10 of a blower mechanism 7 protruding from the outer case 9.

As shown in FIGS. 3 and 4, the blower mechanism 7 includes a cylindrical case 11, a blower turbine blade 12 and a drive motor 13 built in the case 11. In addition, the case 11 is provided with an air suction port 14 and the air outlet pipe 10 respectively.

The drive motor 13 is formed of, for example, a DC series brush motor, and a contact surface between the drive motor 13 and the case 11 and an inner surface of the case 11 have a diameter of 0.1 mm. A lead foil 15 having a thickness of about 2 to 0.3 mm is provided. The lead foil 15 can greatly reduce the amount of noise generated by the blower mechanism 7.

The blower tube 5 connected to the blower mechanism 7 is formed of a flexible and lightweight material having excellent soundproofing properties, such as a closed-cell foam of polyurethane or chloroprene rubber. Thus, while the cooling air from the blower mechanism 7 passes through the blower tube 5, a sufficient noise attenuation effect can be obtained.

The power supply 8 is formed of a storage battery such as a Ni—H battery or a Ni—Cd battery, and its charging terminal 16 projects out of the outer case 9 as shown in FIG. I have. The power source 8 may use a dry battery instead of the storage battery.

On the other hand, as shown in FIGS. 4 and 5, the outer case 9 is composed of a main body 9a opening at the upper end and an opening / closing flap 9b that can open and close the upper end opening of the main body 9a. The opening / closing flap 9b is temporarily fixed to the main body 9a via a planar fastener (not shown) or the like.

As shown in FIG. 5, a belt holder 17 for fixing the outer case 9 to the work belt 3 is attached to the rear side of the outer case 9. An outside air intake 18 is provided at a portion corresponding to the air suction port 14 of the first embodiment. As shown in FIG. 4, an air volume changeover switch 19 also serving as a power switch is mounted on the side surface of the outer case 9. By switching the air volume changeover switch 19, the blown air volume can be switched between two levels. It has become.

That is, when the air volume changeover switch 19 is tilted downward as shown in FIG. 4, the air volume can be reduced to about 0.5 m ³ / min. When the air volume change switch 19 is tilted upward, the air volume can be increased to about 1 m ³ / min, and the air volume change switch 19 is positioned between the two. In this case, the power can be turned off.

The outer case 9 is made of a relatively thick soft material such as a cloth or synthetic leather subjected to a waterproof treatment, and reduces the amount of noise generated by the blower mechanism 7 to the outside. And the blower mechanism 7 and the like can be protected from external force.

Next, the operation of the present embodiment will be described. When the drive motor 13 is started by operating the air volume changeover switch 19, the blower turbine blade 12 is driven to rotate, and cooling air is supplied into the helmet 6 through the blower tube 5.

By the way, in order to keep the temperature and humidity inside the helmet 6 and the outside air temperature and the atmospheric humidity at the same level in summer, the amount of air blown to the helmet 6 should be at least about 0.5 to 1 m ³ / min. However, in the helmet cooler 1 according to the present invention, even if the air flow rate changeover switch 19 is switched to the low wind side, the air flow rate of about 0.5 m ³ / min can be secured, and the helmet cooler 1 is sufficiently practical. Can be provided.

In order to secure a sufficient amount of air to the helmet 6, the minimum static pressure required for the air blowing mechanism 7 is 20 mm / H in consideration of the pressure loss when passing through the air blowing tube 5. _Although it is about ₂ O, in the helmet cooler 1 according to the present invention, a sufficient static pressure can be secured because the turbine blades 12 for blowing are used.

Here, in the case of using the turbine blade 12 for blowing, noise generated by the blowing mechanism 7 becomes a problem. However, the lead foil 15 is disposed on the inner surface of the case 11 and the blowing tube 5 is provided with a soundproof property. It has been confirmed by experiments of the present inventors that the noise in the helmet 6 can be made sufficiently low by forming it from a soft and lightweight material.

That is, when the lead motor 15 is not provided on the inner surface of the case 11 and the drive motor 13 is driven to rotate at about 12000 rpm and the noise generated from the blower mechanism 7 is measured, the value is about 80 dB. However, when the lead foil 15 was provided on the inner surface of the case 11, it was confirmed that the noise value could be reduced to about 45 dB.

A similar experiment was conducted by disposing the lead foil 15 on the outer surface of the case 11 without disposing the lead foil 15 on the inner surface of the case 11. It was also confirmed that almost the same noise reduction effect was obtained.

The present inventors also measured the temperature change inside the helmet 6 when wearing the helmet 6 under the scorching sun at a temperature of 30 ° C. and a humidity of 68% and walking slowly without working. The results shown in FIG. I got

As is clear from FIG. 6, the temperature inside the helmet 6 rises to 55 ° C. 10 minutes after wearing the helmet 6, and the temperature inside the helmet reaches 58 ° C. 15 minutes after wearing the helmet 6. However, if the helmet cooler 1 is activated at this time, the temperature inside the helmet 6 drops rapidly within 2 minutes after activation, and within 4 minutes after activation, the temperature inside the helmet 6 is almost equal to the outside air temperature. It can be seen that it can be reduced to the same level.

The present inventors also carried out an experiment on how the humidity inside the helmet 6 changes while wearing the helmet 6 in a situation where the atmospheric humidity is 18 g / m ³ . As a result, the humidity inside the helmet 6 rose to about 55 g / m ³ 10 minutes after wearing the helmet 6, but when the helmet cooler 1 was activated at this time, it returned to almost the atmospheric humidity within 3 minutes after activation. It was confirmed that it was possible.

However, since the turbine blades 12 for blowing air are used, a sufficient amount of air can be secured inside the helmet 6, and the temperature and humidity inside the helmet 6 can be maintained even when the helmet 6 is worn under the scorching sun. Can be maintained at the same level as the outside temperature and atmospheric humidity.

Further, the noise generated from the blower mechanism 7 can be reduced to about 55 to 60% of the normal value by disposing the lead foil 15 on the inner surface or the outer surface of the case 11. By forming the blower tube 5 with a closed cell foam of synthetic resin or synthetic rubber, the value of the noise from the blower mechanism 7 can be reduced to about 65%.

[0038]

[Effect of the invention]

 As described above, the present invention provides a blower mechanism having a blower turbine blade and a blower tube for guiding cooling air from the blower mechanism to a helmet, and makes the blower tube sound-proof and flexible and lightweight. Since it is made of a material, a blower tube with a large noise reduction effect can be obtained, and even if the blower turbine blades are used to increase the blower volume, the noise amount of the helmet can be reduced. It can be greatly reduced.

In the present invention, since the blower tube is formed of a closed-cell foam made of synthetic resin or synthetic rubber, a blower tube that can be easily obtained from materials and has excellent workability can be obtained.

According to the present invention, the blower mechanism comprises a case, a blower turbine blade and a drive motor built in the case, and at least one of the outer surface and the inner surface of the case has a lead foil. The noise amount generated by the air blower can be effectively suppressed, and only the mechanism that generates the noise is stored in the case, so the size of the case can be reduced. Thus, the weight of the lead foil can be reduced by using less lead foil.

According to the present invention, the case is housed in an outer case containing a power supply, and the outer case can be attached to a wearer's belt, so that noise leakage to the outside of the case can be suppressed. And it is easy to carry.

[0042] Further, in the present invention, since the outer case is provided with a switching means for switching the blowing amount of the blowing mechanism to a plurality of stages, it is possible to easily obtain a blowing amount that meets the requirements of the wearer.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a state in which a wearer is wearing a helmet provided with a helmet cooler according to an embodiment of the present invention.

FIG. 2 is a detailed view of the helmet cooler of FIG. 1;

FIG. 3 is a sectional configuration diagram of a blowing mechanism.

FIG. 4 is a front view of the blower when viewed from above the outer case.

FIG. 5 is a right side view of FIG.

FIG. 6 is a graph showing the change over time in the temperature inside the helmet and the effect of the helmet cooler.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 helmet cooler 2 wearer 3 work belt 4 blower means 5 blower tube 6 helmet 7 blower mechanism 8 power supply 9 outer case 9a main body 9b open / close flap 10 blower outlet pipe 11 case 12 blower turbine blade 13 drive motor 14 air suction port 15 Lead foil 16 Charging terminal 17 Belt holder 18 Outside air intake 19 Air volume changeover switch

Claims (5)

[Utility model registration claims] An air supply mechanism having a turbine blade for air supply, and an air supply tube for guiding cooling air from the air supply mechanism to a helmet, wherein the air supply tube is made of a sound-proof, flexible and lightweight material. A helmet cooler characterized by being. 2. The helmet cooler according to claim 1, wherein the blower tube is formed of a closed cell foam of synthetic resin or synthetic rubber. 3. A blower mechanism includes a case, a blower turbine blade and a drive motor built in the case, and a lead foil is disposed on at least one of an outer surface and an inner surface of the case. The helmet cooler according to claim 1 or 2, wherein: 4. The helmet cooler according to claim 1, wherein the case is housed in an outer case containing a power supply, and the outer case is attachable to a belt of a wearer. 5. The helmet cooler according to claim 4, wherein the outer case has a switching means for switching a blowing amount of the blowing mechanism to a plurality of stages.