Ultrasonic cleaning brush head and toothbrush

Abstract

The utility model discloses an ultrasonic cleaning brush head and toothbrush, ultrasonic cleaning brush head includes the brush head body, ultrasonic transducer and medium capsule, be provided with ultrasonic transducer in the brush head body, and ultrasonic transducer is used to produce ultrasonic wave, and medium capsule is provided with ultrasonic coupling agent, and medium capsule sets up on the brush head body and passes through coupling agent and transmits ultrasonic wave to the object to be cleaned. Ultrasonic transducer sets up in medium capsule, and the coupling agent in medium capsule is contacted with ultrasonic transducer, makes ultrasonic wave emit to the object to be cleaned. Simultaneously utilize ultrasonic cleaning brush head to make toothbrush, and the ultrasonic wave of ultrasonic transducer is transmitted to the tooth and gum surface through the liquid or ultrasonic coupling agent of good acoustic transmission of medium capsule. Handle is equipped with ultrasonic drive circuit, vibrating motor, battery and control circuit. Control circuit is powered by battery, and ultrasonic drive circuit and vibrating motor are connected to the output of control circuit, makes ultrasonic transducer emit double -frequency ultrasonic wave and motor vibration, reaches the effect of removing dental plaque and anti -inflammatory, realizes the purpose of ultrasonic dental cleaning.

Description

Technical Field

[0001] This utility model relates to the field of oral care products technology, and in particular to an ultrasonic cleaning brush head and toothbrush. Background Technology

[0002] An ultrasonic toothbrush is a high-frequency vibrating electric toothbrush with a vibration frequency reaching the ultrasonic range, at least 20kHz. It is the fourth generation of toothbrushes after ordinary toothbrushes, electric toothbrushes, and sonic toothbrushes. It utilizes the cavitation effect excited by high-frequency sound waves to achieve efficient cleaning of teeth and the oral cavity. Ultrasonic waves not only directly kill bacteria and inhibit plaque formation, but also use the high-energy molecules generated by cavitation to wash away the surface of teeth and hidden plaque and stains, thus achieving a cleaning and protecting effect on teeth.

[0003] Currently, ultrasonic toothbrushes have made significant technological progress and are widely used in the field of oral health. Existing technologies are classified into three categories based on their structure. The first type of ultrasonic toothbrush incorporates a piezoelectric transducer in the brush head to generate ultrasonic waves, which are transmitted to the teeth and gums through the bristles. However, a large portion of the ultrasonic energy generated by the piezoelectric transducer is lost due to acoustic impedance mismatch between the media. Furthermore, when a piezoelectric element is built into the brush head to generate ultrasonic vibrations, the cavitation effect generated by a single frequency is very weak, rendering these weak ultrasonic waves essentially ineffective for deep ultrasonic cleaning. Therefore, this type of ultrasonic toothbrush has low ultrasonic transmission efficiency and a weak cavitation effect. The second type of ultrasonic toothbrush improves the transmission efficiency of ultrasonic waves from the transducer through toothpaste and oral fluids to the teeth and gums by adding a waveguide to the brush head, transmitting ultrasonic waves to the teeth and gums more efficiently than the bristles in the first type of ultrasonic toothbrush. However, the interface between the waveguide and the transducer, as well as the waveguide itself, still attenuate the ultrasonic energy generated by the transducer. The third type of ultrasonic toothbrush places the transducer outside the brush head. The exposed piezoelectric transducer sometimes comes into contact with teeth during brushing, and the high-frequency vibrations of the transducer in contact with the teeth can cause discomfort to the user. Furthermore, the exposed piezoelectric transducer poses a safety hazard when brushing. Therefore, the practicality of the third type of ultrasonic toothbrush is limited.

[0004] Based on the analysis of the existing technologies, ultrasonic toothbrushes currently have the following design and technical problems: (1) Existing brush heads cannot solve the problem of toothpaste foam hindering the propagation of ultrasound, resulting in extremely low efficiency in transmitting the ultrasound generated by the brush head to the teeth and gums. The ultrasound generated by the piezoelectric transducer needs to pass through toothpaste foam to reach the teeth and gums. However, the acoustic impedance of these media is quite different, causing the ultrasound to be reflected during propagation. Most of the ultrasound energy is attenuated, which greatly reduces the effective ultrasound energy reaching the surface of the teeth and gums, thereby reducing the transmission efficiency of ultrasound.

[0005] (2) Single-frequency ultrasound produces a weak cavitation effect, which is insufficient to remove dental plaque and reduce inflammation. The bactericidal effect of ultrasound is mainly caused by the cavitation effect. When ultrasound acts on a liquid medium, ultrasound-induced cavitation generates tiny bubbles in the liquid. These bubbles eventually become unstable and collapse, releasing high temperature and pressure at the microscopic scale. During the compression phase of ultrasound, the violent collapse of transient cavitation produces physical effects, such as shock waves and chemical effects caused by OH free radicals. Cavitation nuclei are the basis for bubble formation, and their number and distribution are crucial to the strength of the cavitation effect. Single-frequency ultrasound cannot generate and activate cavitation nuclei as effectively as dual-frequency ultrasound through the interference and superposition of sound waves of different frequencies. Therefore, single-frequency ultrasound produces fewer cavitation nuclei, resulting in a weaker cavitation effect, which in turn affects its ability to clean the surface and crevices of teeth and gums, and thus fails to achieve the effects of removing dental plaque and reducing inflammation.

[0006] In conclusion, there is a need for an ultrasonic toothbrush that can transmit ultrasonic waves to the target to be cleaned. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide an ultrasonic cleaning brush head and toothbrush. The toothbrush transmits ultrasound to the surface of teeth and gums by isolating toothpaste foam through a medium capsule set on the brush head, which solves the technical problems of serious energy loss and weak cavitation effect in the ultrasonic transmission process in the prior art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: The ultrasonic cleaning brush head provided by this utility model includes a brush head body, an ultrasonic transducer, and a media capsule. The brush head body is provided with an ultrasonic transducer for generating ultrasonic waves. The media capsule is provided with an ultrasonic coupling agent. The media capsule is disposed on the brush head body and transmits ultrasonic waves to the target to be cleaned through the coupling agent.

[0009] Furthermore, the ultrasonic transducer is disposed in a medium capsule, and the coupling agent in the medium capsule is in contact with the ultrasonic transducer, so that the ultrasonic waves are emitted to the target to be cleaned.

[0010] Furthermore, the transverse outer surface of the medium capsule is provided with protrusions, which are used to embed into the gaps between the targets to be cleaned during use, so as to transmit ultrasonic waves to the gap locations.

[0011] Furthermore, the protrusions are triangular strips, the protrusions are spaced apart, and the length of the protrusions is less than or equal to the lateral length of the medium capsule.

[0012] Furthermore, the thickness of the medium capsule is an integer multiple of half the wavelength of the ultrasonic wave.

[0013] Furthermore, a friction layer is provided at the front end of the media capsule, which is used to increase the friction between the front end of the media capsule and the surface of the target to be cleaned.

[0014] Furthermore, an ultrasonic reflector is provided on one side of the ultrasonic transducer, and the ultrasonic reflector concave surface is used to reflect the generated ultrasonic waves back to the target to be cleaned. The ultrasonic toothbrush provided by this utility model includes an ultrasonic cleaning brush head, a handle, a controller, and an ultrasonic driving circuit. The ultrasonic cleaning brush head is connected to the handle, and the controller and ultrasonic drive circuit are located in the handle. The controller is connected to the ultrasonic drive circuit, which is connected to the ultrasonic transducer in the ultrasonic cleaning brush head; the ultrasonic transducer generates ultrasonic waves under the drive of the ultrasonic drive circuit.

[0015] Furthermore, it also includes a vibration motor; the vibration motor is mounted on the handle; the controller is connected to the vibration motor, and the vibration motor is connected to the ultrasonic cleaning brush head; used to drive the ultrasonic cleaning brush head to vibrate.

[0016] Furthermore, the ultrasonic drive circuit provides a dual-frequency drive signal, and the difference between the two frequencies of the ultrasonic waves generated by the ultrasonic transducer satisfies the following relationship: Δ Δ ≤0.1 in, The first frequency; The second frequency; Based on the fundamental frequency; Δ This represents the frequency difference.

[0017] This utility model discloses an ultrasonic cleaning brush head and a toothbrush. The ultrasonic cleaning brush head includes a brush head body, an ultrasonic transducer, and a media bladder. The ultrasonic transducer generates ultrasonic waves within the brush head body. The media bladder contains an ultrasonic coupling agent, which transmits the ultrasonic waves to the target area through the coupling agent. The ultrasonic transducer is located within the media bladder, and the coupling agent in the media bladder contacts the ultrasonic transducer, allowing the ultrasonic waves to be emitted to the target area. Simultaneously, the ultrasonic cleaning brush head is used to make a toothbrush, transmitting the ultrasonic waves generated by the ultrasonic transducer to the tooth and gum surfaces through a highly permeable liquid or ultrasonic coupling agent within the media bladder. The handle contains an ultrasonic drive circuit, a vibration motor, a battery, and a control circuit. The control circuit is powered by the battery, and its output is connected to the ultrasonic drive circuit and the vibration motor, causing the ultrasonic transducer to emit dual-frequency ultrasonic waves and the motor to vibrate, achieving the effects of removing plaque and reducing inflammation, thus realizing the purpose of ultrasonic teeth cleaning.

[0018] The brush head provided by this invention isolates toothpaste foam through a specially designed media capsule structure. The media capsule is made of a highly acoustically transparent material, which effectively reduces reflection and attenuation of ultrasonic waves during transmission due to impedance mismatch. Furthermore, the media capsule conforms closely to the teeth and gums, squeezing out toothpaste foam from the teeth and gums during brushing, thus isolating the foam and maximizing the transmission of ultrasonic waves to the tooth and gum surfaces.

[0019] The brush head provided by this invention employs dual-frequency ultrasonic technology to enhance the cavitation effect. Experimental results confirm that dual-frequency or multi-frequency ultrasonic excitation can significantly enhance the acoustic cavitation effect. The cavitation effect intensity induced by dual-frequency ultrasonic irradiation is higher than that induced by single-frequency ultrasound. Under the action of dual-frequency or multi-frequency ultrasound, the frequency range of the synthesized sound field is much larger than the sum of the individual sound field spectra, thereby expanding the range of bubble sizes involved in the cavitation process and increasing the total number of cavitation bubbles.

[0020] Compared with the prior art, the beneficial effects of this utility model are reflected in the following aspects: 1. The medium capsule structure improves ultrasonic wave transmission efficiency. The design of the medium capsule directly contacting the tooth and gum surface and isolating it from air greatly improves the transmission efficiency of ultrasonic waves from the transducer to the teeth. Compared with traditional ultrasonic toothbrushes, it can more effectively utilize ultrasonic energy for cleaning, resulting in more significant teeth cleaning effects, especially for hard-to-clean areas such as between teeth and gingival sulcus.

[0021] 2. Dual-frequency technology enhances the cavitation effect. Dual-frequency or multi-frequency ultrasound enhances the cavitation effect. The use of dual-frequency or multi-frequency technology covers a wider range of bubble resonance, allowing more bubbles to enter a resonant state, thereby enhancing the cavitation effect and achieving the desired effect of removing plaque and reducing inflammation from the tooth surface. It also provides a more comfortable and comprehensive oral cleaning experience, driving the development of oral care technology.

[0022] The use of a dielectric capsule filled with acoustically transparent liquid in this device offers the following advantages compared to a solid waveguide: (1) The medium capsule has good shape plasticity. When the medium capsule is compressed, the shape of the medium capsule will change with the shape of the tooth, which can fully fit the tooth and gum. In addition, it can squeeze out the toothpaste foam on the tooth and gum during brushing, so as to isolate the toothpaste foam and maximize the transmission of ultrasound to the tooth and gum surface.

[0023] (2) The liquid filling the medium capsule is a good sound transmission medium that can efficiently transmit longitudinal ultrasound waves to the teeth and gums.

[0024] (3) The sound-permeable liquid in the medium can transfer the heat generated by the transducer, reduce the transducer temperature, and ensure the stability of the ultrasonic transducer. In addition, it can also prevent the heat emitted by the transducer from damaging the teeth and gums.

[0025] (4) Low production cost, cheap internal sound-permeable liquid, and easy-to-manufacture medium capsule.

[0026] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0027] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration.

[0028] Figure 1 This is a schematic diagram of the overall structure of the ultrasonic toothbrush of this utility model.

[0029] Figure 2 This is a three-dimensional overall structural diagram of the ultrasonic toothbrush of this utility model.

[0030] Figure 3 This is a schematic diagram of the toothbrush head structure in the first positional relationship.

[0031] Figure 4 This is a top view diagram of the toothbrush head structure in the first positional relationship.

[0032] Figure 5 This is a front view schematic diagram of the toothbrush head structure in the second positional relationship.

[0033] Figure 6 This is a top view diagram of the toothbrush head structure in the second positional relationship.

[0034] Figure 7 This is a schematic diagram of the toothbrush head structure in the third positional relationship.

[0035] Figure 8 This is a top view diagram of the toothbrush head structure in the third positional relationship.

[0036] Figure 9 This is an ultrasonic toothbrush acoustic power testing platform.

[0037] Figure 10 A comparison of the acoustic power amplitude of ultrasonic toothbrushes filled with water and foam in the medium capsule.

[0038] Figure 11This is a testing platform for the cavitation effect of ultrasonic toothbrushes.

[0039] Figure 12 This is a comparison chart of transient cavitation intensity of single / dual-frequency ultrasonic toothbrushes.

[0040] Among them, 1-brush head body, 2-brush handle, 3-handle, 4-ultrasonic transducer, 41-ultrasonic reflective concave surface, 5-medium capsule, 5a-circular medium capsule, 5b-annular medium capsule; 6-protrusion; 7-sound-transmitting liquid; 8-vibration motor, 9-ultrasonic drive circuit, 10-controller, 11-battery, 12-protrusions on the surface of medium capsule, 13-power switch, 14-power amplifier one, 15-iron stand, 16-ultrasonic toothbrush, 17-acoustic radiation force balance, 18-display, 19-passive cavitation detector, 20-cavitation detection probe, 21-dual-frequency ultrasonic transducer, 22-power amplifier two. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0042] Example 1 like Figure 3-8 As shown, the ultrasonic cleaning brush head provided in this embodiment includes a brush head body, an ultrasonic transducer, and a media capsule. The brush head body is equipped with an ultrasonic transducer for generating ultrasonic waves. The media capsule is placed on the brush head body, and the ultrasonic waves are transmitted to the target to be cleaned through the filling material inside the media capsule.

[0043] The piezoelectric material includes at least one or more combinations of piezoelectric ceramics, piezoelectric single crystals, piezoelectric polymers, and piezoelectric composite materials. The number of ultrasonic transducers is one, two, or more, preferably two. The ultrasonic transducers are made of piezoelectric materials, preferably type 1-3 piezoelectric composite materials.

[0044] The medium capsule material is a flexible polymer material, which is any one of medical-grade silicone, food-grade silicone, or thermoplastic polyurethane; the flexible polymer material is a material with good mechanical properties (flexibility, wear resistance, and pressure resistance), sound transmission, and non-toxicity; the filling material inside the medium capsule is a liquid with good sound transmission or an ultrasonic coupling agent, and the sound-transmitting liquid in the medium capsule is preferably degassed water, but ordinary liquid water can also be filled in the medium capsule according to the actual situation.

[0045] The ultrasonic transducer is disposed in a media chamber, and the degassed water in the media chamber comes into contact with the ultrasonic transducer, so that the ultrasonic waves are transmitted to the target to be cleaned through the degassed water. In this embodiment, the ultrasonic transducer can be directly encapsulated at the bottom of the water bladder, and then a layer of acoustic gel is coated on the ultrasonic transducer to ensure that energy is directly transmitted into the water. The media capsule is designed to be rounded to fit the shape of the brush head body, preferably circular or annular.

[0046] The medium capsule is a circular capsule, and an ultrasonic transducer is wrapped inside the circular capsule. The medium capsule is an annular capsule, which is disposed on the brush head body, and the ultrasonic transducer is disposed in the annular region inside the annular capsule. like Figure 4 As shown, Figure 4 In the text, 'a' indicates a medium capsule without protrusions, and 'b' indicates a medium capsule with intermittent protrusions; these are used to embed between gaps containing cleaning targets; the transverse outer surface of the medium capsule is provided with protrusions, which are used to embed between gaps between targets to be cleaned during use, so as to facilitate the transmission of ultrasonic waves to the gap location. The protrusions are triangular strips, spaced apart, and the length of each protrusion is less than or equal to the lateral length of the medium capsule.

[0047] The medium capsule is a circular capsule or an annular capsule, and the ultrasonic transducer is disposed inside the circular capsule or an annular capsule.

[0048] In this embodiment, the transverse outer surface of the medium capsule can be provided with 2-3 long triangular protrusions with a height of 1-3 mm, a spacing of 5 mm-10 mm, and a length ≤ the transverse length of the medium capsule. These long triangular protrusions can be embedded in the gap between teeth, so that the ultrasonic waves can be transmitted into the gap between teeth. like Figure 5 As shown, Figure 5 This indicates a brush head body with a concave surface that does not reflect ultrasonic waves and does not have a protruding media bladder. Figure 3 In this embodiment, 5d represents the sound-transmitting liquid placed in the medium capsule; an ultrasonic reflective surface is provided on one side of the ultrasonic transducer, and the ultrasonic reflective concave surface is used to reflect the generated ultrasonic waves back to the target to be cleaned. In this embodiment, the ultrasonic reflective concave surface is preferably a parabolic or spherical surface. The concave surface can refocus the reflected waves onto the tooth or gum surface, thereby improving the utilization rate of ultrasonic energy.

[0049] The front end of the media capsule is provided with a friction layer, which is used to increase the friction between the front end of the media capsule and the surface of the target to be cleaned. The friction layer is used to better remove dental plaque, food residue and other debris from the surface of the target to be cleaned. The friction layer can be configured as a textured or spaced dotted layer. The thickness of the medium capsule is an integer multiple of half the wavelength of the ultrasonic wave.

[0050] In this embodiment, the thickness of the medium capsule can be set to λ / 2; where λ is the wavelength; half a wavelength is intended to allow the sound waves to pass through better and reach the teeth or gums. The media capsule is made by fixing medical-grade silicone onto the brush head body using an integral molding process.

[0051] The dielectric capsule thickness in this embodiment is characterized by the use of a highly acoustically transparent material, and the thickness of the dielectric capsule is half the length of the ultrasonic wave emitted by the ultrasonic transducer within the dielectric capsule. = (Where d is the thickness of the dielectric capsule, and λ is the wavelength of the ultrasonic transducer at that frequency). When the thickness of the dielectric capsule is half the wavelength of the ultrasonic wave within it, the efficiency of the ultrasonic waves emitted by the transducer passing through the dielectric capsule is greatly improved, maximizing their penetration through the capsule.

[0052] The ultrasonic transducer is either a focused ultrasonic transducer or a non-focused ultrasonic transducer; when a focused ultrasonic transducer is used, the transducer is configured to focus ultrasonic energy on a specific area of ​​the tooth or gum (the target to be cleaned); when a non-focused ultrasonic transducer is used, the transducer is configured to diffuse ultrasonic energy, covering multiple areas of the tooth surface.

[0053] The focused ultrasonic transducer concentrates energy at the focal point, making it suitable for localized plaque removal. During use, the user aligns the brush head with the target area (such as between teeth or along the gum line). In focused mode, the ultrasonic energy is concentrated in this area, efficiently breaking down plaque through cavitation and microfluidic action. The brush head body is made of silicone with a wave-shaped microstructure design to reduce energy reflection and improve transmission efficiency. The non-focused ultrasonic transducer emits ultrasonic energy that evenly covers the tooth surface. In non-focused mode, the ultrasonic energy propagates divergently, achieving thorough cleaning.

[0054] Example 2 like Figure 1 , Figure 2 As shown, Figure 1 This is a schematic diagram of the overall structure of the ultrasonic toothbrush provided in this embodiment. Figure 2 This is a three-dimensional overall structural diagram of the ultrasonic toothbrush provided in this embodiment; the medium bladder in this embodiment can be in the form of a water bladder, that is, the medium in the medium bladder is degassed water; this embodiment provides an ultrasonic toothbrush, including an ultrasonic cleaning brush head, a handle, a controller, an ultrasonic drive circuit, a battery, and a vibration motor; the ultrasonic cleaning brush head is connected to the handle. The ultrasonic driving circuit can provide any one of single-frequency, dual-frequency, or multi-frequency driving signals, with dual-frequency driving signals being preferred.

[0055] The controller is connected to an ultrasonic drive circuit, which in turn is connected to an ultrasonic transducer in the ultrasonic cleaning brush head. There are two ultrasonic transducers. Driven by the dual-frequency drive circuit, each ultrasonic transducer generates dual-frequency ultrasonic waves with a sound power of 0.01W-0.4W. The difference Δ between the two frequencies of ultrasonic waves generated by the ultrasonic transducer is... The following relationship must be satisfied: Δ Δ ≤0.1 in, The first frequency; The second frequency; The intermediate frequency; In this embodiment, the ultrasonic cleaning brush head is connected to the handle via the brush handle 2. The brush handle and the handle are connected by a snap-fit, and a damping spring is provided between the connection points, which not only facilitates disassembly but also suppresses the transmission of high-frequency vibrations to the handle, improving grip comfort.

[0056] In this embodiment, the ultrasonic cleaning brush head has a built-in media bladder and an ultrasonic transducer. The media bladder encloses the ultrasonic transducer, and the transducer is located at the bottom of the media bladder.

[0057] The media capsule is located inside the brush head body, and the ultrasonic transducer is immersed in the media capsule. The media capsule extends outward from the brush head body and can contact the tooth surface, effectively isolating toothpaste foam and allowing ultrasonic waves to be directly and efficiently transmitted to the tooth surface.

[0058] The media capsule is designed with a smooth, rounded shape to fit the shape of the brush head body. This shape can enclose the piezoelectric element and closely conform to the tooth surface, providing uniform liquid contact. The surface of the media capsule is provided with protrusions to increase friction with the tooth surface.

[0059] The media capsules are arranged in a ring shape, forming a unique brush head body that further improves ultrasonic wave transmission efficiency and cleaning effect. The media capsules directly contact the tooth surface, and the ring-shaped media capsules can create a uniform ultrasonic wave transmission area around the teeth; The media capsule fully covers the brush head body and is designed for users who seek the ultimate ultrasonic cleaning effect, providing the strongest cleaning power; the media capsule directly contacts the tooth surface, and this structure maximizes the use of the ultrasonic wave conduction function of the media capsule.

[0060] In this embodiment, the handle contains an ultrasonic drive circuit, a vibration motor, a battery, and a controller. The ultrasonic drive circuit, vibration motor, and controller are all powered by the battery. The controller output is connected to the ultrasonic drive circuit and the vibration motor, causing the ultrasonic transducer to emit dual-frequency ultrasonic waves and the vibration motor to vibrate 9,000-40,000 times per minute.

[0061] In this embodiment, a power button is also provided on the handle to control the toothbrush's on / off state.

[0062] Example 3 The ultrasonic toothbrush will be further described in detail below with reference to specific embodiments.

[0063] like Figure 3 , 4 As shown, where, Figure 3 The brush head body is equipped with an ultrasonic reflective concave surface, and the brush head body has a media capsule inside.

[0064] First, precisely install the ultrasonic transducer in the pre-set position inside the brush head body, ensuring it is completely immersed in the circular media capsule. The inner side of the circular media capsule tightly wraps around the ultrasonic transducer, while the outer side contacts the tooth surface.

[0065] The acoustic power of an ultrasonic toothbrush containing degassed water and foam was measured using a power amplifier and an acoustic radiation force balance. The experimental setup is as follows: Figure 9 As shown, the ultrasonic toothbrush is fixed to an iron stand, and a power amplifier drives the ultrasonic toothbrush to emit ultrasonic waves. The results are as follows... Figure 10 As shown, the acoustic power emitted by an ultrasonic toothbrush with a media chamber filled with degassed water is about two orders of magnitude greater than that emitted by an ultrasonic toothbrush with a media chamber filled with foam. The acoustic power emitted by the ultrasonic toothbrush with a media chamber filled with foam is only ambient noise, indicating that foam attenuates ultrasonic waves significantly, and the effective energy reaching the tooth surface is very small. This also shows that the media chamber can effectively isolate foam and maximize the transmission of ultrasonic waves.

[0066] The acoustic cavitation intensity generated by single-frequency and dual-frequency ultrasound was detected using power amplifier one, power amplifier two, and a passive cavitation detector. The experimental setup is as follows: Figure 11 As shown, a dual-frequency ultrasonic transducer is placed in a soundproof water tank. Power amplifier one and power amplifier two drive the dual-frequency ultrasonic transducer. The cavitation detection probe is positioned directly at the focal point of the dual-frequency ultrasonic transducer. A passive cavitation detector collects data, which is received by LabVIEW software. Finally, the data is processed by MATLAB, and the results are output to the monitor. The results are as follows: Figure 12 As shown, the transient cavitation intensity of dual-frequency ultrasound is approximately 6 times that of single-frequency ultrasound, indicating that dual-frequency ultrasound can enhance acoustic cavitation.

[0067] In this embodiment, a power switch is provided on the outside of the handle, and an ultrasonic drive circuit, a vibration motor, a battery, and a controller are provided inside the handle. The battery is electrically connected to the ultrasonic drive circuit, the vibration motor, and the controller, respectively, and the power switch is electrically connected to the controller. The power switch is used to control the connection and disconnection of the battery. In this embodiment, the controller output is connected to an ultrasonic drive circuit and a vibration motor, causing the ultrasonic transducer to emit ultrasonic waves and the motor to vibrate. The battery supplies power to the controller and generates current. The controller sends a control signal to cause the ultrasonic drive circuit to apply voltage to the ultrasonic transducer, enabling the ultrasonic transducer to generate an operating frequency of 20kHz to 6MHz. The controller generates a control signal with a pulse width of 150Hz-700Hz through the drive circuit to drive the motor to vibrate. When the motor is working, it drives the brush head body to vibrate together through the brush handle.

[0068] like Figure 5 , 6 As shown, the brush head of this ultrasonic toothbrush is a ring-shaped medium capsule.

[0069] During the manufacturing of the brush head body, the annular dielectric capsule is fixed at a specific position on the brush head body. The annular dielectric capsule is manufactured using a one-piece molding process and is made of medical-grade silicone. The ultrasonic transducer is installed in the annular region inside the annular dielectric capsule, ensuring that the piezoelectric element is immersed in the dielectric capsule.

[0070] During use, the controller drives the ultrasonic transducer to work, and the annular medium capsule transmits the ultrasonic waves evenly to the area around the teeth.

[0071] like Figure 7 , 8 As shown, the medium capsule of the ultrasonic brush head of this invention completely covers the brush head body.

[0072] The brush head is manufactured by covering its entire surface with a large media capsule. This media capsule is then tightly bonded to the brush head's outer shell using processes such as heat pressing. The ultrasonic transducer is installed in the core of the brush head, located beneath the media capsule, and is completely enclosed within it. The media capsule and the brush head's outer shell are sealed using methods such as welding to ensure no leakage. Textures or raised dots can be added to the surface of the media capsule to increase friction with the tooth surface and aid in ultrasonic cleaning.

[0073] When the user turns on the toothbrush, the controller drives the ultrasonic transducer through the ultrasonic drive circuit. The ultrasonic waves act directly on the tooth surface through the fully covered medium capsule. The cavitation effect of the ultrasonic waves can be maximized, making it especially suitable for users who have high requirements for ultrasonic cleaning.

[0074] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. An ultrasonic cleaning brush head, characterized in that: The brush head includes a brush head body, an ultrasonic transducer, and a media capsule. The ultrasonic transducer is disposed in the brush head body and is used to generate ultrasonic waves. The media capsule is disposed on the brush head body and transmits ultrasonic waves to the target to be cleaned through the coupling agent. The thickness of the medium capsule is an integer multiple of half the wavelength of the ultrasonic wave. The medium capsule material is a flexible polymer material; The media bladder and the brush head housing are sealed to ensure no leakage. The outer lateral surface of the medium capsule is provided with protrusions, which are used to embed into the gaps between the targets to be cleaned during use, so as to transmit ultrasonic waves to the gaps. When the medium capsule is used, its shape changes with the shape of the teeth, conforming to the teeth and gums, squeezing out toothpaste foam on the teeth and gums, thus isolating the toothpaste foam and allowing the ultrasound to be transmitted to the surface of the teeth and gums to the maximum extent. The ultrasonic transducers are two or more, generating dual-frequency or multi-frequency ultrasonic waves.

2. The ultrasonic cleaning brush head as described in claim 1, characterized in that: The ultrasonic transducer is disposed in a medium capsule, and the coupling agent in the medium capsule is in contact with the ultrasonic transducer, so that the ultrasonic waves are emitted to the target to be cleaned.

3. The ultrasonic cleaning brush head as described in claim 1, characterized in that: The protrusions are triangular strips, spaced apart, and the length of each protrusion is less than or equal to the lateral length of the medium capsule.

4. The ultrasonic cleaning brush head as described in claim 1, characterized in that: The front end of the media capsule is provided with a friction layer, which is used to increase the friction between the front end of the media capsule and the surface of the target to be cleaned.

5. The ultrasonic cleaning brush head as described in claim 1, characterized in that: An ultrasonic reflector is provided on one side of the ultrasonic transducer, which reflects the generated ultrasonic waves back to the target to be cleaned.

6. A toothbrush made using the ultrasonic cleaning brush head according to any one of claims 1-5, characterized in that: Includes ultrasonic cleaning brush head, handle, controller, and ultrasonic drive circuit; The ultrasonic cleaning brush head is connected to the handle, and the controller and ultrasonic drive circuit are located in the handle. The controller is connected to the ultrasonic drive circuit, which is connected to the ultrasonic transducer in the ultrasonic cleaning brush head; the ultrasonic transducer generates ultrasonic waves under the drive of the ultrasonic drive circuit.

7. The toothbrush as described in claim 6, characterized in that: It also includes a vibration motor; the vibration motor is mounted on the handle; the controller is connected to the vibration motor, and the vibration motor is connected to the ultrasonic cleaning brush head; used to drive the ultrasonic cleaning brush head to vibrate.

8. The toothbrush as described in claim 6, characterized in that: The ultrasonic drive circuit provides dual-frequency drive signals, and the frequency difference generated by the ultrasonic drive circuit driving the ultrasonic transducer satisfies the following relationship: D D ≤0.1 in, The first frequency; The second frequency; Based on the fundamental frequency; Δ This represents the frequency difference.

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