KR100608217B1 - ultrasonic generating toothbrush - Google Patents

Abstract

The present invention relates to a piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output, and more particularly, to an ultrasonic toothbrush equipped with a small ultrasonic generating horn fastened by piezoelectric ceramics to produce ultrasonic vibration effectively and minimize the power consumption to make it portable. Multi-frequency output is available for oral cleanliness and removal of soft plugs formed at the beginning and suppression of bacterial breakdown and reproduction between gums and teeth, prevention of stomatitis recurrence and treatment of oral inflammation. The present invention relates to a piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output configured to be inexpensive and simple to exchange.

In order to realize this,

In the ultrasonic toothbrush equipped with a bristle support for the bristle is mounted on the handle and the front end of the handle, and equipped with an ultrasonic vibrator inside the handle,

A switch unit 21 for turning on and off the ultrasonic toothbrush;

A rechargeable battery pack for supplying driving power;

A driving circuit 3 for generating multiple frequencies;

An electric wire 11 'for connecting the driving circuit and the metal electrode ring 11;

A metal electrode ring (11) positioned alternately with the piezoelectric ceramic (9) and made of a pair to receive a voltage from the driving circuit to vibrate the piezoelectric ceramic;

A piezoelectric ceramic 9 for generating vibration by receiving a voltage from a driving circuit through the metal electrode ring;

Located between the piezoelectric ceramic and the driving circuit, the front metal elastic body is fastened by bolts and the rear metal elastic body 10 for efficiently transmitting the vibration of the piezoelectric ceramic to the front metal elastic body,

A front metal elastic body 12 having an anisotropy boundary surface as a polygonal shape formed by a circular arc and a straight line and generating multi-frequency vibration by simultaneously generating length vibration, bending vibration, and torsional vibration;

An ultrasonic vibrator (20) consisting of a bolt (19) for fastening the front metal elastic body (12), the piezoelectric ceramic (9), the rear metal elastic body (10), and the metal electrode ring (11);

An acoustic impedance matching layer 14 positioned between the ultrasonic vibrator and the bristle support to effectively transmit the ultrasonic vibration;

A bristle supporter 22 which supports the bristles and is positioned at an extension of the acoustic impedance matching layer;

Located on the tip of the toothbrush handle and comprises a bristle 16 for cleaning the teeth supported by the toothbrush support.

The boundary surface of the front metal elastic body is formed in a similar shape to an ellipse consisting of circular arcs and straight lines, and thus has anisotropy to generate various vibration shapes to provide powerful washing and cleaning effects, and to give an inclination angle that is an angle of the extension line between the boundary surface and the polishing surface. It generates the length oscillation, bending oscillation and torsional oscillation of the oscillator at the same time to widen the cavitation area generated by the ultrasonic wave, and filter the harmonics of various frequencies generated from the square wave, the oscillation frequency, by the resonance effect of the piezoelectric ceramic. By grafting, it can drive with multiple frequencies, so the size and intensity of the cavity can be varied from 400㎛ to several ㎛ size. Ultrasonic brush head sterilization and cleaning effect by maximum cavitation regardless of the shape and location of the object to be cleaned. Can be harvested.

In addition, by the fine length, flexion, torsional vibration corresponding to 22,000 times, 44,000 times, 66,000 times per second of the bristles, there is an effect that can achieve a mechanical brushing effect to minimize the impact of the gums.

In addition, the strength of the ultrasonic vibrator may be increased to anion the washing water stored in the oral cavity and to generate surfactant ions, thereby providing an effect of increasing the washing effect.

Piezoelectric body, ultrasonic vibrator, toothbrush.

Description

Piezoelectric ultrasonic toothbrush with multi-frequency output             

1 is a partial cross-sectional perspective view showing an example of a piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

Figure 2 is a perspective view of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

3A to 3F are exploded view of ultrasonic vibrators of a piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

Figures 4a to 4f is a view showing the ultrasonic transducer shape and dimensions of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

5 is a view schematically showing a vibration displacement measuring apparatus of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

6 is a view showing a result of measuring the vibration displacement of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

Figure 7 is a schematic diagram of the underwater oscillation experiment of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

8a to 8d is a diagram showing the results of the underwater oscillation experiment of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

9 is a view showing a current waveform analysis apparatus for analyzing the current waveform according to the inclination angle of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

10A to 10B are diagrams showing current waveforms and FFT analysis results when the inclination angle of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention is 45 °.

11A to 11B are diagrams illustrating current waveforms and FFT analysis results when the inclination angle of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention is 0 °.

12 is a view showing the results of analyzing the resonant frequency of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention with HP4194A.

13a to 13c is a view showing the results of analyzing the vibration mode of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention by FEM.

14 is a view showing an increase in the synthesized vibration amplitude appearing at the interface of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

Explanation of symbols on the main parts of the drawings

1: handle part 2: battery pack for charging

3: drive circuit 4: partition

5: separator 6: handle groove

7: Silicone rubber packing 8: Silicone elastic rubber

9: piezoelectric ceramic 10: rear metal elastic body

11: metal electrode ring 11 ': electric wire

12: front metal elastomer 13: brush bristle jaw

14: acoustic impedance matching layer 15: leaf spring

16: brush head 17: hanging groove

18: engaging jaw 19: fastening bolt

20: ultrasonic vibrator 21: switch unit

22: brush head support 41: interface

41 ': straight part 41' ': curved part

42: 1st stage 43: 2nd stage

44: three-stage 45: polishing surface

50: inclination angle 52: hydraulic cylinder

53: bottom 54: jig

55: hydraulic press 56: fixed upper part

57: vibration displacement sensor for vertical displacement measurement

58: vibration displacement sensor for horizontal displacement measurement

61: vertical vibration displacement 62: left and right vibration displacement

71: water tank 72: water

73,74,81: aluminum foil 82: hole

91: power supply unit 92: drive circuit

94: piezoelectric vibrator power input line 95: current sensor

96: oscilloscope

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output, and more particularly, to an ultrasonic toothbrush equipped with a compact ultrasonic generating horn fastened by piezoelectric ceramics, which effectively generates ultrasonic vibrations and minimizes power consumption. Multi-frequency output is available for oral cleanliness and removal of soft plugs formed at the beginning and suppression of bacterial breakdown and reproduction between gums and teeth, prevention of stomatitis recurrence and treatment of oral inflammation. The present invention relates to a piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output configured to be inexpensive and simple to exchange.

Applicant has applied for an ultrasonic toothbrush using a piezoelectric ultrasonic vibrator in the application number 10-2004-0090029 filed in the Republic of Korea.

The ultrasonic toothbrush using the piezoelectric ultrasonic vibrator filed above generates a metal elastic body and ultrasonic vibration which amplify and transmit the ultrasonic vibrator with a piezoelectric ceramic bolt that can generate ultrasonic waves above 28 kHz with excellent bactericidal and cleaning effects. By including a drive circuit to make, it is possible to effectively transmit ultrasonic vibration to the bristles and to provide an effective and stable ultrasonic toothbrush by forming an acoustic impedance matching layer for effectively transmitting the ultrasonic vibration between the electrical insulation and the metal elastic body and the bristles. However, there is a limit in providing various frequencies by making the boundary surface of the metal elastic body circular, and there is also a limitation in providing various frequencies because there is no inclination angle which is an angle of the extension line between the boundary surface and the polishing surface.

Piezoelectric ceramics are widely used in ultrasonic applications, displacement generators, and various sensors in various fields such as electronics, communications, and machinery.

It is used as an ultrasonic vibrator, sonar, piezoelectric buzzer, speaker, actuator, etc. by using the characteristic that contraction and expansion coincide with the frequency of the signal when the electrical signal is applied to the piezoelectric body. It is used for piezoelectric ignition elements and various sensors using electric energy. In addition, in some cases, the piezoelectric inverter may simultaneously utilize the two energy conversion effects.

The mechanical vibration occurs when the electrical signal is applied to the piezoelectric body. The reverse piezoelectric effect is used, and since the most displacement occurs when the voltage of the resonant frequency of the piezoelectric ceramic is applied, it is widely used as an ultrasonic vibrator.

The ultrasonic vibrator converts high frequency power into mechanical vibration and transmits the mechanical vibration to the medium through a vibrating body (typically a horn made of metal).

Generally known electric toothbrushes rotate the bristles mechanically by an electric motor, so cleaning of the tooth surface is possible, but it is impossible to clean minute gaps between the gums and teeth. Toothbrush use, such as infants are immature, causing oral injuries cause inflammation. In addition, toothbrushes that have accelerated the driving frequency of electromagnets up to 300 times per second have been commercialized, but these toothbrushes are also large and strong in amplitude, which does not solve the disadvantages of electric toothbrushes, and expects a cavitation effect with 300 vibrations per second. Difficult to expect sterilization and cleaning effect by cavitation. In order to solve this problem, ultrasonic toothbrushes using piezoelectric ultrasonic methods have recently been recognized in the medical field in developed countries, and are commercialized in SONEX, which is registered in the US (US5546624). However, the product uses a 1.6 MHz thick vibration mode in which a piezoelectric body that generates ultrasonic vibration is attached to the plastic of the bristle part, and ultrasonic waves generated by the plastic of the toothbrush are attenuated by the plastic of the toothbrush. It hardly occurs, and only by the effect of the ultrasonic sound transmission, and the mechanical vibration is not generated effective ultrasonic vibration energy and cavitation effect using the piezoelectric material by adopting the vibration motor method, the disadvantage of the vibration motor method mentioned above Has not solved. Therefore, there is a need for a more effective ultrasonic toothbrush that can simultaneously generate ultrasonic vibration and cavitation effects.

Therefore, the present invention can easily install the ultrasonic vibrator to solve the above problems, piezoceramic and metal vibrating body capable of generating ultrasonic waves of 20kHz ~ 80kHz known to be excellent in bactericidal and cleaning effect Design and manufacture the drive circuit and drive the ultrasonic vibration at multiple frequencies by using harmonics generated from square wave, and form the interface in the shape similar to the ellipse consisting of circular arc and straight line, and the inclination angle which is the angle of the extension line between the interface and the polishing surface. By providing various frequencies, it can generate length vibration, bending vibration, and torsional vibration simultaneously to generate powerful and various sized cavity, effectively removing fine plugs and bacteria caught between large foreign substances and gums, and various vibration modes. Effective delivery to the brush head The purpose of the group in order, and the acoustic impedance methoxy chingcheung to effectively transfer the ultrasonic vibration to the vibrating body and between the electrical insulation and the metal brush head is formed and intended to provide an effective and reliable ultrasonic toothbrush.

Specific first object of the present invention is to form an interface in a similar shape to an ellipse consisting of a circular arc and a straight line having anisotropy to generate a variety of frequencies to provide a strong cleaning, cleaning effect.

A second specific purpose of the present invention is to provide a strong cleaning and cleaning effect by generating various frequencies by giving an inclination angle which is an angle of an extension line between the interface and the polishing surface.

In order to achieve the above object, the present invention,

In the ultrasonic toothbrush equipped with a bristle support for the bristle is mounted on the handle and the front end of the handle, and equipped with an ultrasonic vibrator inside the handle,

A switch unit 21 for turning on and off the ultrasonic toothbrush;

A rechargeable battery pack for supplying driving power;

A driving circuit 3 for generating multiple frequencies;

An electric wire 11 'for connecting the driving circuit and the metal electrode ring 11;

A metal electrode ring (11) positioned alternately with the piezoelectric ceramic (9) and made of a pair to receive a voltage from the driving circuit to vibrate the piezoelectric ceramic;

A piezoelectric ceramic 9 for generating vibration by receiving a voltage from a driving circuit through the metal electrode ring;

Located between the piezoelectric ceramic and the driving circuit, the front metal elastic body is fastened by bolts and the rear metal elastic body 10 for efficiently transmitting the vibration of the piezoelectric ceramic to the front metal elastic body,

A front metal elastic body 12 having an anisotropy boundary surface as a polygonal shape formed by a circular arc and a straight line and generating multi-frequency vibration by simultaneously generating length vibration, bending vibration, and torsional vibration;

An ultrasonic vibrator (20) consisting of a bolt (19) for fastening the front metal elastic body (12), the piezoelectric ceramic (9), the rear metal elastic body (10), and the metal electrode ring (11);

An acoustic impedance matching layer 14 positioned between the ultrasonic vibrator and the bristle support to effectively transmit the ultrasonic vibration;

A bristle support 22 which supports the bristles and is located at an extension of the acoustic impedance matching layer;

Located on the tip of the toothbrush handle and comprises a bristle 16 for cleaning the teeth supported by the toothbrush support.

The front metal elastic body 12,

형상으로 직선부위(41')와 곡면부위(41'')로 이루어지며 상기 압전 세라믹으로부터 초음파 진동을 전달받아 전방금속탄성체 하단에 전달하는 경계면(41)과;

A boundary portion 41 formed of a straight portion 41 'and a curved portion 41''in a shape and receiving ultrasonic vibration from the piezoelectric ceramic and transmitting the ultrasonic vibration to the lower end of the front metal elastic body;

A first metal front elastic body which is in contact with the interface and has a large diameter located at the bottom of the front metal elastic body, and transmits vibrations transmitted to the interface to the middle of the front metal elastic body;

Located in the extension of the front metal elastomer 1 stage and located in the front metal elastomer stop and the diameter of the front metal elastic body is smaller than the front metal elastic body 1 stage, the front metal elastic body for transmitting the vibration transmitted from the front metal elastic body 1 stage to the top of the front metal elastic body Two stages;

Located in the extension of the two front metal elastomer and located at the top of the front metal elastomer, the diameter is smaller than the two front metal elastomer, and transmits the vibration transmitted from the first metal elastomer to the impedance matching layer, both sides Three-stage front metal elastic body having a polished surface formed by shaping the metal surface; and generating a multi-frequency vibration by simultaneously generating a length vibration, a bending vibration, and a torsional vibration by giving a predetermined angle between the boundary surface 41 and the polishing surface 45. It is characterized by.

The present invention also provides an inclination angle 50 of 0 ° to 60 ° between the front metal elastic three-stage polishing surface 45 and the linear portion 41 'of the boundary surface 41 among the ultrasonic vibrators that amplify and transmit ultrasonic vibrations. It is characterized by.

The front metal elastic body is characterized by anodizing (anodizing), chromium plating or titanium (Ti) coating to remove the oxidation phenomenon.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

1 is a partial cross-sectional perspective view showing an example of a piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

In the ultrasonic toothbrush equipped with a bristle support for the bristle is mounted on the handle and the front end of the handle, and equipped with an ultrasonic vibrator inside the handle,

A switch unit 21 for turning on and off the ultrasonic toothbrush;

A rechargeable battery pack for supplying driving power;

A driving circuit 3 for generating multiple frequencies;

An electric wire 11 'for connecting the driving circuit and the metal electrode ring 11;

A metal electrode ring (11) positioned alternately with the piezoelectric ceramic (9) and made of a pair to receive a voltage from the driving circuit to vibrate the piezoelectric ceramic;

A piezoelectric ceramic 9 for generating vibration by receiving a voltage from a driving circuit through the metal electrode ring;

Located between the piezoelectric ceramic and the driving circuit, the front metal elastic body is fastened by bolts and the rear metal elastic body 10 for efficiently transmitting the vibration of the piezoelectric ceramic to the front metal elastic body,

A front metal elastic body 12 having an anisotropy boundary surface as a polygonal shape formed by a circular arc and a straight line and generating multi-frequency vibration by simultaneously generating length vibration, bending vibration, and torsional vibration;

An ultrasonic vibrator (20) consisting of a bolt (19) for fastening the front metal elastic body (12), the piezoelectric ceramic (9), the rear metal elastic body (10), and the metal electrode ring (11);

An acoustic impedance matching layer 14 positioned between the ultrasonic vibrator and the bristle support to effectively transmit the ultrasonic vibration;

A bristle supporter 22 which supports the bristles and is positioned at an extension of the acoustic impedance matching layer;

Located on the tip of the toothbrush handle and comprises a bristle 16 for cleaning the teeth supported by the toothbrush support.

As shown in the handle portion 1, the charging battery pack 2 and the driving circuit input terminal are connected and divided into partitions 4 therebetween.

The driving circuit for generating the ultrasonic vibration is connected to the metal electrode ring 11 of the ultrasonic vibrator 20 by two wires 11 'and the ultrasonic vibrator is the rear metal elastic body 10 of the ultrasonic vibrator and the ultrasonic vibrator. Supported by silicon elastic rubber (8) between the separators (5), two ring-shaped piezoelectric ceramics (9) are bolted through a hole in the center of the front metal elastic body (12) and the rear metal elastic body (10) in parallel. It is.

The silicone elastic rubber 8 is preferably a silicone elastic rubber or a resin may be inserted in order to be elastically fitted to the rear metal elastic body 10 of the ultrasonic vibrator, it may be used other materials that can be elastically fitted.

In addition, in order to securely secure the ultrasonic vibrator 20 to the handle portion 1, the locking jaw 18 is installed in the ultrasonic generating horn, and the locking jaw is a silicone rubber packing 7 for waterproofing in the groove 6 of the upper handle. It is fixed by).

The handle portion 1 configured as described above is fastened by the bristle portion 16 and the locking jaw 13 provided with the acoustic impedance matching layer 14 for easy transmission of ultrasonic waves.

In addition, the acoustic impedance matching layer 14 is installed at an angle of 0 ~ 45 ° as shown in θ of Figure 1 can be adjusted so that the optimum ultrasonic vibration is transmitted, the acoustic impedance matching layer is the front metal elastic body 12 for ultrasonic generation and Acoustic impedance uses similar materials.

Figure 2 is a perspective view of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

The ultrasonic vibrator used in the present invention will be described in detail as follows.

As shown in the drawing, a piezoelectric ceramic 9 for generating ultrasonic waves and a front metal elastic body 12 and a rear metal elastic body 10 for effectively transmitting vibrations of the piezoelectric ceramics to the bristles are provided. The metal electrode ring 11 for connecting the ceramic 9 to the driving circuit 3 is sandwiched therebetween, and the front metal elastic body 12, the piezoelectric ceramic 9, the rear metal elastic body 10, and the metal electrode ring ( 11 is fastened with a bolt 19.

3A to 3F are exploded view of ultrasonic vibrators of a piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

As shown, Figure 3a is a rear metal elastic body 10, Figure 3b is a metal electrode ring 11,

FIG. 3C shows a piezoelectric ceramic 9, FIG. 3D shows a bolt 19, FIG. 3E shows a polymer insulator tube which prevents the bolt 19 and the piezoelectric ceramic 9 from touching, and FIG. 3F shows a front metal elastic body 12. FIG.

Figures 4a to 4f is a view showing the ultrasonic transducer shape and dimensions of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

형상의 이방성을 갖는 형태로 구성되는 부위를 경계면(41)이라 정의한다.Among the components of the ultrasonic vibrator of the present invention, the piezoelectric ceramic 9 and the front metal elastic body 12 in the boundary region of the front metal elastic body 12 are not circular.

The part comprised in the form which has the shape anisotropy is defined as the interface 41.

Fig. 4A is an overall view of the front metal elastic body having the polishing surface 45 coinciding with the straight portion 41 'of the boundary surface 41, and as shown in Figs. 4B and 4C, the boundary surface 41 of the front metal elastic body is the straight portion. 4c having a curved surface and a curved portion, the thickness of the interface 41 is about 1 mm, the maximum displacement length is 25 mm and the length of the straight portion is 20 mm, as shown in FIG. 4c. The diameter of the horn was changed to three stages of 92 mm. At this time, the diameter of the boundary surface of the first stage 42 and the second stage 43 is 7 mm, the diameter of the boundary surface of the second stage 43 and the third stage 44 is 5 mm, and the diameter of the third stage 44 which is the end is The diameter was reduced by 2 mm by 3 mm. In addition, the length of the first stage 42 was 27 mm, and the length of the second stage 43 was 33 mm. On the other hand, in order to change the intensity of the vibration mode, the shape of the three stages 44 is polished as shown in 45 of FIG. 4 so that the circular one becomes 2 mm thick. 4D, 4E, and 4F show the front metal elastic body processed such that the angle of the polishing surface 45 is 45 ° from the straight portion 41 'of the boundary surface 41.

5 is a view schematically showing a vibration displacement measuring apparatus of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

Figure 6 is a view showing the results of measuring the vibration displacement of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

As shown in FIG. 5, the ultrasonic vibrator 20 is placed on the bottom surface 53 of the hydraulic cylinder 52, and a rectangular hollow jig 54 is placed on the tip of the ultrasonic vibrator 20 to fix the upper portion of the hydraulic press 55 ( 56) and vibration displacement sensors (57, 58) for vertical displacement measurement (57) and horizontal displacement measurement (58) are applied, and a load of 10 kgf is applied. Measure the vibration and vibration displacement in the left and right directions. The measurement results are shown in FIG.

As shown in FIG. 6, when the angle of the polishing surface 45 is 0 °, the up and down vibration displacement 61 is generated, but the left and right vibration displacement 62 is hardly generated. On the other hand, it can be seen that the upper and lower vibration displacements 61 and the left and right vibration displacements 62 appear at the same time when processed at an inclination of 40 to 50 °.

Figure 7 is a schematic diagram illustrating the underwater oscillation experiment of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

8a to 8d is a view showing the results of the underwater oscillation experiment of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

9 is a view showing a current waveform analysis device for analyzing the current waveform according to the inclination angle of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

In order to confirm that the up and down vibration displacement 61 and the left and right vibration displacement 62 appear at the same time when processed at an inclination of 40 to 50 °, the schematic diagram of the oscillation experiment in water using aluminum foil is shown in FIG. 7. Water 72 was placed in the water tank 71, and the aluminum foils 73 and 74 were placed on the side surfaces of the third stage 44 of the ultrasonic vibrator 75, that is, the polishing surface 45 and the aluminum foil 73 were placed. When placed in parallel, when the inclination angle is 0 ° as a result of oscillation for 30 seconds, it can be seen that the hole 82 by cavitation is not formed in the aluminum foil 73 as shown in FIG. 8A, and the inclination angle is 45 degrees. As shown in 8b, a hole 82 by cavitation was formed. On the other hand, when the end of the polishing surface 45 and the aluminum foil 74 were placed vertically, holes by cavitation were formed regardless of the inclination angle. That is, when the inclination angle is 0 °, as shown in Fig. 8C, the hole 82 by cavitation is formed on the surface perpendicular to the end. When the inclination is 45 °, the hole 82 by cavitation formed at the end of the horn is shown in Fig. 8D. As can be seen, it can be observed to form over a wide range. 8A, 8B, the cavitation hole is formed only on the vertical surface, when the inclination angle is 0 °, the strong ultrasonic waves are generated in the longitudinal vibration direction and transmitted to the aluminum foil 81 at the end of the horn, 45 °. In the case of length vibration, torsional vibration, and bending vibration simultaneously occur, it can be seen that holes 82 formed by cavitation are formed on both surfaces perpendicular to and parallel to the polishing surface 45 as shown in FIGS. 8C and 8D. . To explain this phenomenon,

A non-contact Tektronix P6021 AC current probe (95) is connected to the piezoelectric vibrator power input line (94) connecting the drive circuit (92) to the power supply unit (91) to connect the output of the ultrasonic vibrator (20) and the drive circuit (92). 10A to 10B and 11A to 11B show the results of the current waveform and the FFT analysis using the Tektronix TDS3034 oscilloscope 96 after driving with the scale adjusted to 2 mA / mv.

10A to 10B are diagrams showing current waveforms and FFT analysis results when the inclination angle of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention is 45 °.

11A to 11B are diagrams illustrating current waveforms and FFT analysis results when the inclination angle of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention is 0 °.

10A shows the result when no load is applied to the end of the ultrasonic vibrator when the inclination angle is 45 °, and 10B shows the result when driving by applying a load of 10 kgf. The numbers shown in the lower graph are the frequency analysis results. From the left, 22 (① of Fig. 10A), 44 (② of Fig. 10A), 66 (③ of Fig. 10A), 88 (④ of Fig. 10A), and 110 (Fig. Frequency components multiplied by an integer of 22 kHz, such as 5) of 10a and 132 (6 of FIG. 10A). As can be seen from the results, when the load is applied, the current value increases from 60.2 ㎃ to 62.2 ㎃, and the frequency components of 44 (Fig. 10b ②), 88 (④ in Fig. 10b), 132 (⑥ in Fig. 10b), In other words, the frequency component multiplied by 44 kHz increases, and the peak multiplied by 22 kHz is accurately observed.

On the other hand, Figure 11a is when the load is not applied to the end of the horn when the inclination angle is 0 °

The result is shown in Fig. 11B when driving by applying a load of 10 kgf. As can be seen from the results, as shown in Figs. 10A to 10B, the current value slightly increases, and it can be seen that an increase in frequency components (2, 4 and 6 in Fig. 10B) which is an integral multiple of the 44 Hz component is not observed. This results in an increase in the vibration mode when the inclination angle is 45 degrees compared with the case where the inclination angle is 0 degrees.

12 is a view showing the results of analyzing the resonant frequency of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention with HP4194A.

13a to 13c is a view showing the results of analyzing the vibration mode of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention by FEM.

14 is a view showing an increase in the synthesized vibration amplitude appearing at the interface of the ultrasonic vibrator of the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention.

The resonance frequency of the ultrasonic vibrator horn assembled as shown in FIG. 2 is shown in FIG. 12 using HP4194A. As shown in Fig. 12, 22 (① in Fig. 12) 44 (② in Fig. 12), 66 (③ in Fig. 12), 88 (④ in Fig. 12), 110 (⑤ in Fig. 12), 132 ( A region with low impedance is observed near 6) ㎑ of FIG. It can be seen that only an integer multiple of 22 kHz is filtered out of various frequency components generated by harmonics to drive the horn. On the other hand, the vibration mode of the ultrasonic vibrator designed as shown in Figure 4 by the FEM analysis is shown that the length vibration as shown in Figure 13a, torsional vibration as shown in Figure 13b, and bending vibration as shown in Figure 13c. The vibrations are suppressed or raised according to the angle of the polishing surface 45, and when the load is applied to the end as shown in FIG. 6, it can be seen that the vibration is suppressed when the angle between the polishing surface and the interface is 0 °. When the angle between the polishing surface 45 and the interface 41 is 45 degrees, vibration is not suppressed. This phenomenon occurs due to an increase in the size of the synthesized vibration 3 appearing at the interface where the vibration direction 1 of the straight portion 41 'and the vibration direction 2 of the curved portion 41' 'meet as shown in FIG. to be.

Therefore, when the bristles are mounted with a constant load on the end of the ultrasonic vibrator, manufacturing the angle between the polished surface and the boundary surface near 45 ° will effectively transmit the ultrasonic vibration to the bristles. On the other hand, according to the use of the ultrasonic toothbrush, it is possible to present a method that can adjust the intensity by the inclination angle.

That is, the ultrasonic vibration movement of the brush head is generated in the ultrasonic region and is transmitted to the tooth through the brush head.

The cleaning principle of the ultrasonic wave is explained by supplying electrons to the hydrogen ions in the amount generated by the electrolysis action additionally generated when the ultrasonic vibrator is driven to discharge hydrogen, and the hydroxide ion (OH-) becomes a water molecule (H2O). It is possible to increase the washing efficiency by reacting with 'H3O2-' to produce a surfactant.

The bristle and vibrator attachment parts are made of synthetic resin containing ore capable of emitting anions by external pressure, such as amethyst or tourmaline, and the minerals in these synthetic resins are pressurized as the vibration of the ultrasonic vibrator is transmitted to the bristles or head for attaching the vibrator. It is applied to increase the anion generation, the front and rear metal elastic body is made of stainless steel, aluminum, titanium alloy, duralumin, and the like.

In addition, when the front and rear metal elastomers 11 and 12 are made of aluminum-based metal, anodizing, chromium plating, or titanium (Ti) coating is performed in order to remove oxidation caused by an alkaline solution.

When the ultrasonic toothbrush of the present invention is driven, cavitation occurs in a solution in which oral fluid, toothpaste, and water are mixed in the oral cavity.

At this time, the inside of the cavitation is a high temperature and high pressure state at a temperature of about 3300K and a pressure of 313atm, and thus, thermal decomposition of water molecules and volatile substances occurs.

In addition, about 4 mm of hydroxide ions (HO-) are present in the solution around the cavitation zone, and when the cavitation collapses, a temperature of 1900 K is generated, and non-volatile materials and ionic compounds are oxidized or pyrolysis occurs.

On the other hand, the solution surrounding the bubble is at room temperature and hydrogen peroxide is accumulated. Hydroxide ions present at the interface of the cavitation region react with water molecules to form a surfactant called H3O2- to increase washing efficiency and to change water to weak alkali.

The biggest feature of the present invention is to give a constant angle between the polished surface and the interface as described above to generate the length vibration, bending vibration, torsional vibration of the ultrasonic vibrator at the same time, thereby widening the cavitation area caused by the ultrasonic wave, By combining harmonics of various frequencies generated from square waves with the filtering effect of the resonance effect of piezoelectric ceramics, they can be driven at multiple frequencies, which can generate cavities varying in size and intensity from 400 μm to several μm. Regardless of the shape and location of the water, it can be sterilized and cleaned by maximum cavitation. For reference, the size and density of the cavitation according to the driving frequency are shown in FIG. 12. Ultrasonic waves of the bristles are transmitted to the ultrasonic wave to generate strong cavitation, and the generated cavitation is transmitted to the gums and every corner of the tooth to disinfect and remove soft plaque and bacteria.

In addition, by the fine length, flexion, torsional vibration corresponding to 22,000 times, 44,000 times, 66,000 times per second of the bristles, there is an effect that can achieve a mechanical brushing effect to minimize the impact of the gums.

Next, refer to FIG. 1 to examine the operation relationship.

The bristles and the bristle support is mounted on the tip of the handle portion, the ultrasonic toothbrush equipped with an ultrasonic vibrator inside the handle portion is known in the art.

When the switch unit for turning on and off the ultrasonic toothbrush is turned on, power is supplied from a rechargeable battery pack for supplying driving power, and power is applied to a driving circuit generating multiple frequencies.

It is alternately positioned with the piezoelectric ceramic 9 through a wire 11 ′ for connecting the driving circuit and the metal electrode ring 11, and is formed in a pair to receive a voltage from the driving circuit to vibrate the piezoelectric ceramic. A current is supplied to 11) and a piezoelectric ceramic 9 that generates vibration by receiving a voltage from a driving circuit through the metal electrode ring is operated. Located between the piezoelectric ceramic and the driving circuit, the back metal elastic body 10 for supporting the elasticity of the front metal elastic body and a polygonal shape formed in a straight line with a circular arc have an anisotropy interface and have length vibration, bending vibration, and torsional vibration. Vibration is transmitted to the front metal elastic body 12 that simultaneously generates the multi-frequency vibration, and is located between the ultrasonic vibrator and the bristle support to operate the acoustic impedance matching layer for effectively transmitting the ultrasonic vibration. To support the bristles and vibrations are transmitted to the bristles around the bristles for cleaning the teeth supported by the toothbrush support through the bristle supporter located in the extension of the acoustic impedance matching layer, the tooth cleaning and cleaning is performed.

형상으로 직선부위(41')와 곡면부위(41'')로 이루어지며 상기 압전 세라믹으로부터 초음파 진동을 전달받아 전방금속탄성체 하단에 전달하는 경계면(41)을 통하여 경계면과 접하고 있으며 전방금속탄성체 하단에 위치한 직경이 굵으며, 상기 경계면에 전달된 진동을 전방금속탄성체의 중단에 전달하는 전방금속탄성체 1단에 전달되며, 상기 전방금속탄성체 1단의 연장에 위치하고 있으며 전방금속탄성체 중단에 위치하고 직경이 상기 전방금속탄성체 1단보다 작으며 상기 전방금속탄성체 1단으로부터 전달된 진동을 전방금속탄성체의 상단에 전달하는 전방금속탄성체 2단에 전달되고, 전방금속탄성체 2단의 연장에 위치하고 있으며 전방금속탄성체 상단에 위치하고 직경이 상기 전방금속탄성체 2단보다 작으며 상기 전방금속탄성체 1단으로부터 전달된 진동을 임피던스 메칭층에 전달하며, 양쪽면을 깍아 형성한 연마면이 위치한 전방금속탄성체 3단;으로 이루어져 있으며 상기 경계면(41)과 연마면(45)간에 일정한 각도를 줌으로써 길이 진동, 굴곡 진동, 비틀림 진동을 동시에 발생시켜 다중 주파수 진동을 발생된다. The front metal elastomer 12 is

It consists of a straight portion 41 'and a curved portion 41''in shape and is in contact with the boundary surface through an interface 41 which receives ultrasonic vibration from the piezoelectric ceramic and transmits it to the bottom of the front metal elastic body. The diameter is thick, located in the front metal elastomer one stage that transmits the vibration transmitted to the boundary to the front metal elastomer, located in the extension of the front metal elastic one stage and located in the front metal elastomer stop It is smaller than 1st front metal elastomer and is transmitted to 2nd front metal elastic body which transmits vibration transmitted from the 1st front metal elastic body to the top of the front metal elastic body, and is located in the extension of 2nd front metal elastic body, and is located on the front of the front metal elastic body. It is located in the diameter smaller than the front metal elastomer two stages and transmitted from the first metal elastic body first stage It transfers copper to the impedance matching layer, consisting of three steps of the front metal elastic body is located on the polished surface formed by cutting both sides; and by giving a constant angle between the interface 41 and the polishing surface 45, length vibration, bending vibration, By generating torsional vibration at the same time, multi-frequency vibration is generated.

Among the ultrasonic vibrators that amplify and transmit ultrasonic vibrations, an inclination angle 50 of 0 ° to 60 ° is provided between the three-stage polishing surface 45 of the front metal elastic body 45 and the linear portion 41 'of the interface 41. Giving an angle of inclination (50) of 60 ° ~ 60 ° can be more powerful washing and cleaning.

The configuration and operation as described above are not limited to the claims of the present invention as an embodiment, and various changes and modifications are possible within the scope of not changing the technical spirit of the present invention. It is obvious to those who are engaged.

According to the piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output according to the present invention having the above configuration and action,

The boundary surface of the front metal elastic body is formed in a similar shape to an ellipse consisting of circular arcs and straight lines, and has anisotropy to generate various frequencies to provide powerful washing and cleaning effects, and to give an ultrasonic angle by giving an inclination angle, which is the angle between the boundary surface and the polishing surface. It generates the length vibration, bending vibration, and torsional vibration of the ruler at the same time and uses it to widen the cavitation area generated by the ultrasonic wave, and the harmonics of various frequencies generated from the square wave, the oscillation frequency, are combined with the filtering effect by the resonance phenomenon of the piezoelectric ceramic By driving at multiple frequencies, the size and intensity of the cavity can be varied from 400 μm to several μm. Ultrasonic brush heads allow sterilization and cleaning effects by maximum cavitation regardless of the shape and location of the object to be cleaned. You can reap.

In addition, by the fine length, flexion, torsional vibration corresponding to 22,000 times, 44,000 times, 66,000 times per second of the bristles, there is an effect that can achieve a mechanical brushing effect to minimize the impact of the gums.

In addition, the strength of the ultrasonic vibrator may be increased to anion the washing water stored in the oral cavity and to generate surfactant ions, thereby providing an effect of increasing the washing effect.

Claims (4)

In the ultrasonic toothbrush equipped with a bristle support for the bristle is mounted on the handle and the front end of the handle, and equipped with an ultrasonic vibrator inside the handle, A switch unit 21 for turning on and off the ultrasonic toothbrush; A rechargeable battery pack 2 for supplying driving power; A driving circuit 3 for generating multiple frequencies; An electric wire 11 'for connecting the driving circuit and the metal electrode ring 11; A metal electrode ring (11) positioned alternately with the piezoelectric ceramic (9) and made of a pair to receive a voltage from the driving circuit to vibrate the piezoelectric ceramic; A piezoelectric ceramic 9 for generating vibration by receiving a voltage from a driving circuit through the metal electrode ring; Located between the piezoelectric ceramic and the driving circuit, the front metal elastic body is fastened by bolts and the rear metal elastic body 10 for efficiently transmitting the vibration of the piezoelectric ceramic to the front metal elastic body, A front metal elastic body 12 having an anisotropy boundary surface as a polygonal shape formed by a circular arc and a straight line and generating multi-frequency vibration by simultaneously generating length vibration, bending vibration, and torsional vibration; An ultrasonic vibrator (20) consisting of a bolt (19) for fastening the front metal elastic body (12), the piezoelectric ceramic (9), the rear metal elastic body (10), and the metal electrode ring (11); An acoustic impedance matching layer 14 positioned between the ultrasonic vibrator and the bristle support to effectively transmit the ultrasonic vibration; A bristle supporter 22 which supports the bristles and is positioned at an extension of the acoustic impedance matching layer; A piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output, characterized in that it comprises a bristles (16) for cleaning the teeth supported by the toothbrush support is located at the tip of the toothbrush handle. The method of claim 1, The front metal elastic body 12,

A boundary portion 41 formed of a straight portion 41 'and a curved portion 41''in a shape and receiving ultrasonic vibration from the piezoelectric ceramic and transmitting the ultrasonic vibration to the lower end of the front metal elastic body; A first metal front elastic body which is in contact with the interface and has a large diameter located at the bottom of the front metal elastic body, and transmits vibrations transmitted to the interface to the middle of the front metal elastic body; Located in the extension of the front metal elastomer 1 stage and located in the front metal elastomer stop, the diameter of the front metal elastic body is smaller than the front metal elastic body 1 stage and forward metal elastic body for transmitting the vibration transmitted from the front metal elastic body 1 stage to the top of the front metal elastic body Two stages; Located in an extension of the two front metal elastomers and located on top of the front metal elastics, the diameter is smaller than the two front metal elastomers, and transmits vibrations transmitted from the first metal elastic body to the impedance matching layer, and cuts both sides. It consists of three stages of the front metal elastic body is located, the polishing surface is formed to generate a multi-frequency vibration by generating a length vibration, bending vibration, torsional vibration at the same time by giving a predetermined angle between the boundary surface 41 and the polishing surface 45 Piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output. The method of claim 2, Among the ultrasonic vibrators that amplify and transmit ultrasonic vibrations, the inclination angle 50 of 0 ° to 60 ° is provided between the three-stage polishing surface 45 of the front metal elastic body 45 and the straight portion 41 'of the interface 41. Piezoelectric ultrasonic vibrator toothbrush with frequency output. The method according to claim 1 or 2, The front metal elastic body, A piezoelectric ultrasonic vibrator toothbrush capable of multi-frequency output, characterized by anodizing, chromium plating, or titanium (Ti) coating to eliminate oxidation.

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