JPS6340981Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to ski goggles that allow the amount of ventilation to be adjusted depending on conditions such as outside temperature.

A very effective way to prevent the goggle lenses of ski goggles from fogging is to forcibly exchange the warm, humid air inside the goggles with the low-humidity, low-temperature outside air. Therefore, there has been provided a goggle which is equipped with a ventilation fan and a small motor that drives the fan at the upper center of the goggle frame, and the inside of the goggle is ventilated by the rotation of the fan. In this case, if the outside temperature is 0℃ or higher,
When the goggle lenses start to fog, the fog can be removed in a short time by rotating the fan at high speed and rapidly exchanging large amounts of air. However, the outside temperature is 0℃
If a large amount of air is exchanged at high speed in a short period of time, the inside of the goggles will cool rapidly and freeze before the water droplets that cause fogging can be removed, making it impossible to obtain a sufficient anti-fog effect. Therefore, in a low-temperature environment below 0° C., if cloudy weather is expected, it is desirable to gradually replace the air inside the goggles by rotating the fan at low speed in advance to reduce the air volume.

The present invention aims to solve these conventional problems, and its features include ski goggles equipped with a ventilation fan and a motor that drives the fan. The present invention is characterized in that a control circuit for controlling the rotation speed of the motor is provided.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. As shown in FIGS. 1 to 4, ski goggles include a goggle frame 1, a goggle lens 2 fitted into the goggle frame 1, Ventilation fan 3
, a small motor 4 for driving the fan 3 and the motor 4, a mounting base 5 for attaching the fan 3 and the motor 4 to the goggle frame 1, and a rubber band 7 connected to the goggle frame 1 with a control box 6 in the middle. has been done. The goggle frame 1 is composed of a lens fitting edge 8, a face seat 9, and a peripheral wall part 10, and a goggle lens 2 is fitted into the lens fitting edge 8.
A close contact material 11 such as a sponge is attached to the face support 9. The peripheral wall portion 10 is provided with a plurality of ventilation holes 12 on both sides of the lower part and a breathable covering material 13 that covers the same from the outside, and similar ventilation holes 14 and a covering material 15 are provided on the upper side. and its covering material 1
5 is protected by a protector 16. Mounting stand 5
is equipped with a ventilation hole 17 at the lower center and a motor mounting base 18 corresponding to the ventilation hole 17, and the peripheral wall 1 of the goggle frame 1.
0 through an engaging claw 19. The motor 4 is fitted into the motor mounting portion 18 from above, and the fan 3 is mounted to the lower end of the output shaft of the motor 4. The fan 3 is of an axial flow type or the like. The protector 16 has an upwardly protruding portion 20 in a portion corresponding to the mounting base 5, and also has a large number of openings 2.
1, and is configured so as not to impair breathability. The goggle lens 2 has two inner and outer lens plates 2.
The lens plate 22 has a pinhole 24 communicating with the inside of the lens.
is formed, and a water-repellent ventilation filter 25 is attached to cover the pinhole 24. Inside the control box 6, there is a power source 26 such as a battery,
A control device 27 for controlling the motor 4 is housed therein. As shown in FIG. 5, the control device 27 is comprised of a power switch 28, an oscillation circuit 29, a changeover switch 30 for forward and reverse rotation, and the like. The oscillation circuit 29 includes transistors 31, 32, 33, a capacitor 34,
35, resistors 36, 37, 38, variable resistor 39, diode 40, etc., and is configured as an unstable multivibrator, and this oscillation circuit 29 is connected to the power source 28 side rather than the changeover switch 30.
Each element of the power switch 28, changeover switch 30, and oscillation circuit 29 is mounted on a printed circuit board 41, and the power switch 28, changeover switch 30, and variable resistor 39 are connected to operating elements 41, 42 that protrude downward from the control box 6. , 43, respectively. Although the switches 28 and 30 are slide type, they are not limited to this.

Next, the operation of the above configuration will be explained. When the power switch 28 of the control device 27 is turned on and the changeover switch 30 is operated to the forward rotation side (a side),
The oscillation circuit 29 generates a rectangular pulse, and the pulse signal is applied to the motor 4 via the changeover switch 30, and the motor 4 begins to rotate at a rotation speed corresponding to the pulse signal. That is, in the oscillation circuit 29, now,
Assuming that the transistor 31 is on and the transistor 32 is off, the transistor 33 is turned on and a current I ₁ flows through the motor 4 through the changeover switch 30 in the forward rotation direction. At this time, the electric charge in the capacitor 34 is being discharged through the resistors 36, 37, and 39, and when the electric charge is discharged after a certain period of time, the transistor 32 is turned on. On the other hand, when this transistor 32 is turned on, the capacitor 35 is turned on by the resistor 38 during the off period.
Since it is charged to near the power supply voltage via
This charging voltage is applied to transistor 31, and transistor 31 is turned off. At the same time, the charge in the capacitor 35 is discharged through the resistors 38, 37, and 39, and after a certain period of time, the transistor 31
is switched from off to on, and transistor 32 is turned off. When the transistor 32 is turned on, the transistor 33 is turned off and the current _I1 of the motor 4 is cut off. In this way, the oscillation circuit 29 repeats the on/off operation of the transistors 31, 32, and 33, and the on/off period can be arbitrarily controlled by operating the variable resistor 39 to change the time constant. Therefore, the motor 4 is driven by a pulse control method, and the number of revolutions can be increased or decreased as desired, and the power loss during the increase or decrease can be minimized.

When the changeover switch 30 is connected to the reverse direction (side b), a current I ₂ in the reverse direction similarly flows through the motor 4, causing the motor 4 to rotate in the reverse direction.

When the motor 4 rotates in the normal direction, the fan 3 driven by this rotates in the intake direction, and the cold air from the outside is introduced into the goggle interior 44 through the ventilation hole 17 of the mounting base 5 as shown by the arrow in FIG. 3. Further, the warm air inside the goggle 44 is discharged to the outside from the ventilation holes 12 and 14 formed in the peripheral wall 10 of the goggle frame 1, thereby performing a predetermined ventilation. When the motor 4 reverses, the fan 3 rotates in the exhaust direction, exhausting the warm air inside the goggles 44 directly to the outside from the ventilation hole 17 of the mounting base 5 as shown by the arrow B in FIG. 12,1
A suitable amount of outside air is introduced from 4 and the inside of the goggle frame 1 is similarly ventilated. Therefore, when using goggles when there is no snowfall, switch 3
By setting 0 to the forward rotation side and rotating the motor 4 and fan 3 in the ventilation direction, it is possible to forcibly introduce cold air from outside to prevent fogging of the goggle lens 2. Also, during snowfall, the changeover switch 30 can be set to the reverse rotation side. By setting the motor 4 and the fan 3 to the exhaust direction, it is possible to prevent snow from adhering to the upper side of the goggle frame 1, and also to prevent the goggle lens 2 from fogging up, allowing use according to the conditions. It is possible.

Furthermore, in both cases of intake and exhaust, the rotational speed of the motor 4 can be controlled in consideration of the outside temperature, and the amount of ventilation can be adjusted as appropriate. That is, when the outside air temperature is 0°C or higher, when the goggle lens 2 starts to fog up, the fan 3 is rotated at high speed to exchange a large amount of warm air inside the goggle in a short time, thereby quickly cleaning the goggle lens 2. Can prevent fogging. However, 0℃
When the outside temperature is below, set the fan 3 to low rotation speed and gradually ventilate by reducing the air volume sufficiently to prevent the inside of the goggles 44 from rapidly cooling down and becoming frozen before water droplets are removed. This prevents the goggle lens 2 from fogging up, and in this case as well, the goggle lens 2 can be used in accordance with conditions such as the outside temperature.

In the above description of the operation, the explanation has been focused on the anti-fogging of the goggle lenses 2, but the same can be said about the anti-fogging of the lenses when wearing eyeglasses for vision correction. For example, if the lenses of the glasses start to fog up, the fan 3 can be rotated at high speed in the intake direction to instantly remove the fog, and then rotated at low speed in the intake or exhaust direction. Furthermore, in the embodiment, an oscillation circuit 2 is used as a control circuit.
9 is shown as an example, and a pulse control method is adopted,
It is not limited to this, and for example, a voltage control method, a current control method, etc. may be adopted, and the control is not limited to stepless continuous control, but may also be a stepwise control method. . Motor 4, fan 3
The mounting structure, model, etc. can be changed as necessary. The lens structure may be a single piece.

According to the present invention, since a control circuit is provided to control the rotation speed of the motor, the ventilation amount of the fan can be adjusted according to conditions such as the outside temperature or the degree of fogging, and fogging can be removed in a short time. This makes it possible to prevent the inside of the goggles from freezing due to rapid cooling.

[Brief explanation of the drawing]

The drawings illustrate one embodiment of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a vertical sectional view, and FIG.
4 is a sectional view of the control section, and FIG. 5 is a circuit diagram of the control section. 1... Goggle frame, 2... Goggle lens, 3
...Fan, 4...Motor, 5...Mounting base, 6...
...control box, 26 ...power supply, 27 ...control device, 28 ...power switch, 29 ...oscillation circuit,
30... Changeover switch.

Claims (1)

[Scope of utility model registration request] 1. Ski goggles comprising a ventilation fan and a motor for driving the fan, characterized in that the ski goggle is provided with a control circuit for controlling the rotational speed of the motor.