KR20080006908A - Remover of dust from the bottoms of footwear - Google Patents

Abstract

A dust remover for footwear using ultrasonic resonance is provided to get rid of dust and foreign substances stained with the footwear at high efficiency and low power consumption, without giving much load to a sole. A dust remover for footwear includes: a piezoelectric element ceramic(11) to generate mechanical vibrations at a rotation-inversion axis mode(13); a drive axis(15) for vibrating at the same pitch with the ceramic; and an oscillation circuit(21). When the drive axis starts vibrating, a dust remover spring(14) vibrates in every direction. A power supply line(18) supplies power to necessary elements. A timer(20) sets an operation time of the dust remover, depending on humidity and wind conditions. Thusly collected dusts are gathered to a dust tray(28).

Description

Remover of dust from the bottoms of footwear}

1 is a perspective view of a finished product showing the entire shoe fur device according to the present invention

Figure 2 is a perspective view of the component showing the shoe slipper according to the present invention in a front view and a plan view

Figure 3 is a perspective view of the part showing the ultrasonic vibration model which is a key element of the shoe fur device according to the present invention

* Explanation of symbols on the main parts of the drawing *

11. Ultrasonic oscillator (piezo ceramic) 12. Ultrasonic oscillator fixing hole

13. Driven shaft fixing nut 14. Soil hairy spring

15. Drive shaft 16. Driven shaft

17. After frame 18. Power supply line

19 Ground wire 20. Timer

21. Oscillation circuit 22. Power supply line

23. Proximity switch transmitter 24. Proximity switch receiver

25. Concrete soil scaffolding scaffold 26. Right oscillator power supply line

27. Trowel hairs bottom plate 28. Mudguards

29. Power supply 30. Ultrasonic oscillator fixing bolt

31. Oscillating coil 32. Equivalent resistance

33. Variable Capacitors 34. Power Supply and Frequency

In the domestic situation where the grass is not domesticized, foreign matters attached to the soles of shoes inside buildings and homes should be removed frequently. If the foreign matter remaining inside the building is dried, it is converted into dust by the indoor air, which is harmful to health. So almost all of the building entrances are equipped with a shoe fur device. However, its function is so weak that on wet days, the dirt on the shoes enters the building without being shaken.

The reason is that the existing shoe hair device does not have any action to remove the dirt on the shoes. Of course, until now, there was a method of giving a hair device spring by using a vibration of the motor, but a lot of power was required, and it was not possible to form a constant and uniform vibration. And because there is a limit to generate a very high frequency by motor vibration and the price is too expensive, there were a lot of problems in sales.

In order to shake off the dust and foreign substances on the soles of shoes with high efficiency and low power, the existing shoe hairs are provided with active operation function to the fixed springs of the device, and the dusts on the soles of the shoes are shaken off. This dusting operation does not require high amplitudes and high strengths, but requires a technique that allows the dust to come off when it comes in contact with dust at high amplitudes of low energy. Therefore, the energy that can shake off the dust is combined with the ultrasonic wave and the coherent dust that is firmly attached in a short time by the resonance frequency between the ultrasonic wave and the natural frequency of the drive shaft is prevented from applying much power and excessive force to the bottom of the shoe. In addition, when the human hair is not on the device board, idling power consumption occurs, so the automatic hair start and stop function is required to automatically stop the shoe hair when not in use. In addition, in order to generate a large amplitude vibration with little energy, resonance must be made between the frequency generated by the ultrasonic oscillator and the natural frequency of the drive shaft, but the natural frequency of the drive shaft is different depending on the operating conditions. Considering the shape and weight range, it was necessary to adjust the ultrasonic oscillator frequency. However, the natural vibration range of the drive shaft is expected to be low frequency (1000Hz ~ 2000Hz) which is below the ultrasonic vibration range, so that the vibration generated by the ultrasonic oscillator also needs to move toward the low frequency, causing a lot of vibration.

The present invention for achieving the above object is to maintain the cleanliness in the building so as not to harm the hygiene health caused by dust. Existing shoe hair is used to power the device to remove dirt from the soles of shoes more efficiently and actively, and devises a device that generates such vibrations to shake off dirt with resonant frequency and high amplitude. In order to minimize the power required to operate the device for a long time, the oscillation ceramic 11 of the piezoelectric element was used and mechanical vibration occurred in the crystal shaft mode 13 when a voltage of 60 Hz was applied in the crystal shaft mode 33. The vibration generated as described above is transmitted to the drive shaft 15 firmly coupled to the oscillation ceramic 11, and the drive shaft 15 vibrates at the same frequency as the oscillation ceramic 11 to oscillate and resonate in the oscillation ceramic 11. And drive shaft natural frequency (15) should be the same within the resonance range. However, the drive shaft 15 will vary in the various natural frequencies of the product by varying the geometric shape and the weight and material modulus of elasticity according to the use conditions and capacity. Therefore, the oscillation frequency of the ultrasonic oscillation ceramic 15 is adjusted to make the resonance with the drive shaft 15 to make the resonance motion. To do this, the variable capacitor 33 and the variable resistor device 32 configured in the oscillation circuit 21 can be used. The variable resistor device includes various variable resistance elements, reactances, and variable elements of impedance, making it difficult to create a constant value. . So the variable element of vibration was set to the variable capacitor 33. The oscillation components (power supply frequency 34, equivalent oscillation coil 31, and equivalent resistors 32) are designed so that the variable range of the excitation vibration is the same range as the frequency of the drive shaft.

However, it is never easy to construct these equivalent values into mathematical models, and there are many related parameters. Since the natural frequency range of the drive shaft 15 having the mechanical structure is expected to be from 900 Hz to 2000 Hz, the vibration element characteristic value is designed so that the frequency of the ultrasonic ceramic oscillator 11 also falls within the range. When the drive shaft 15 vibrates, the soil spring 14 attached to the surroundings also vibrates in accordance with the vibration of the drive shaft, and moves up and down and left and right to come into contact with dirt on the upper shoe sole. In order to horizontally transmit the vibration generated from the drive shaft 15, the driven shaft 16 was inserted, and the vibration movement of the drive shaft 15 was received to vibrate passively to increase the efficiency of the hair. In addition, the vibration generated in the drive shaft 15 to the outside is also effective to increase the life of the product. The drive shaft 15 is almost integrally coupled to the ceramic oscillator 11 and securely fixed using the fixing bolt 30. The driven shaft 16 is fixed to the frame 17 using a fixing nut 17. Three or more ceramic oscillators 11 are attached to at least one installation side, and the other side requires the same amount of ceramic oscillator. Then, the power supply line 18 is used to supply power to each of the installation ceramics 11 to supply power to them. Shoe fur is supplied with power and frequency 34 to the device to vibrate and constantly vibrate. Therefore, a lot of power is wasted. So, when a person climbs on the plate 27 of the earthy hair device, a hold contact was used by placing the transmitter 23 and the receiver 24 of the proximity switch to automatically operate for a predetermined time. At this time, the operating time of the soil hair removal apparatus was adjusted by using the timemer 20, and the operating time may be determined according to the atmospheric humidity and wind conditions. As an option, it is possible to determine whether the soiling device is running using humidity, which can have a significant effect on soil attachment. There is scaffolding concrete (25) to stabilize the soil fluffy equipment during installation and is supplied upon user request. The dust dust shaken off by the vibrating action of the ultrasonic oscillator 11 is collected in the mudguard 28 and is discarded to the outside when a certain amount is collected.

The existing vibration generating device by the motor rotational motion was introduced, but the cost of converting the rotational motion to vibration was very low. In addition, while it is difficult to obtain a uniform amplitude, the ultrasonic vibration oscillator converts the electric force of the piezoelectric crystals into vibrations naturally, so the power cost is very low and the efficiency is very high. In addition, the operating cost is very low because the vibration is made of a large amplitude vibration movement using a small power. Furthermore, as a measure of eliminating unnecessary uptime, a proximity switch, which is activated when a person climbs on a dirt board, was used to further reduce the fundamentally small power requirements. Ultrasonic oscillation ceramics operate independently of the number of start-ups, unlike the motor vibration method, where the temperature rises as the number of start-ups increases.

Claims (6)

Shoe-hairing device using ultrasonic resonance to shake off the dirt on the sole of the shoe by using the resonance between the frequency of the ultrasonic oscillator and the natural vibration of the drive shaft.The crystal shaft mode 31 by applying voltage to the piezoelectric oscillator crystal axis mode 33. To generate vibrations The method of dusting dust by driving the natural frequency of the drive shaft in the shoe-shafting device using ultrasonic resonance of 1 paragraph and making it resonate with the frequency generated by the ultrasonic oscillation element. Designed to increase the efficiency of dust hair and extend the life of the drive shaft by allowing the shoe-hair using the ultrasonic resonance of 1 to transmit the resonance motion of the drive shaft to the driven shaft through the spring. Method and device for driving when the person lands on the shoe hair plate to prevent the power consumption from the regular operation in the device using the ultrasonic resonance of paragraph 1 and adjusting the time length as necessary. Method to determine the presence or absence of an object on the shoe hair plate by using the shoe position near the device using the ultrasonic resonance of Clause 1. Shoe fur using the ultrasonic resonance of paragraph 1 gives the person who enters the following guide to induce curiosity to make more use and increase the efficiency of dust hair

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