Dental multiband light curing machine

Abstract

The invention relates to the technical field of oral treatment instruments, in particular to a dental multiband light curing machine which comprises a mounting disc, a cover plate and a plurality of vibration units. The mounting disc is close to the heat dissipation plate, a plurality of air outlets are formed in the mounting disc, and a plurality of separation rings are arranged in the mounting disc; the cover plate covers the mounting disc, and a plurality of air inlets are formed in the cover plate; the space defined by the installation disc and the cover plate is divided into a plurality of concentric annular grids through the multiple separation rings. The multiple vibration units are distributed in the annular grids corresponding to the air outlets respectively, and when the vibration units vibrate, surrounding air can be driven to flow and be blown to the heat dissipation plate. The problem that an existing multi-band light curing machine needs to be frequently stopped to work for charging can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oral treatment instruments, and particularly relates to a multi-band dental light curing machine. Background Art

[0002] With the improvement of the quality of life, people have higher requirements for dental aesthetics and occlusal function, etc. A dental light curing machine (hereinafter referred to as a light curing machine) can be used in combination with dental filling and repair materials to achieve various types of dental repair treatments, and has become an important medical device product in oral clinics. Photocurable composite resin is a commonly used dental filling and repair material in clinics, which contains a photoinitiator. As the curing light source of the resin, the light curing machine irradiates the resin to activate the photoinitiator, initiate a polymerization reaction, and promote the conversion of resin monomers into a polymer network. This process is the photocuring process.

[0003] A multi-band light curing machine is an innovative dental device that can emit light of multiple wavelengths to meet the curing requirements of different materials. Since the multi-band light curing machine can cover the wavelength ranges required by different photocurable materials, it is applicable to various types of composite resins, adhesives, and other photocurable materials. Whether it is for composite filling, crown curing, or orthodontic treatment, it can provide the corresponding light source, thereby effectively activating the photoinitiator in different materials and improving the curing effect of the materials.

[0004] At present, compared with the traditional single-band light curing machine that only needs to drive an LED chip of one wavelength, the multi-band light curing machine adopts a multi-chip design, that is, it realizes the output of light of multiple wavelengths by combining multiple LED chips of different wavelengths. When working, the multi-band light source usually needs to provide sufficient light intensity for each wavelength to ensure that the light of each wavelength can effectively cure the material. This means that each chip needs to be driven by a higher power, resulting in an increase in the overall power.

[0005] In the prior art, in order to enable doctors to move freely in the working area during treatment, the light curing machine is usually equipped with a rechargeable battery, which does not need to be directly connected to a power source during use, facilitating doctors to adjust the treatment position and angle. However, the overall power of the multi-band light curing machine is relatively high, and the battery power consumption is relatively fast. Moreover, the irradiance of the light curing machine decreases as the battery power decreases. In order not to affect the curing effect, it is necessary to frequently pause the treatment to charge the multi-band light curing machine, thus affecting the work efficiency. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a multi-band dental light curing machine to solve the problem that the existing multi-band light curing machine needs to frequently pause work for charging.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A multi-band light curing machine for dental use, comprising a body, a battery, a heat dissipation plate, a receiver, a multi-band light source and a heat dissipation device; the battery is arranged at the rear end inside the body, and the heat dissipation plate, the receiver, the multi-band light source and the heat dissipation device are arranged at the front end inside the body; the receiver and the multi-band light source are connected to the front side of the heat dissipation plate; the heat dissipation device is arranged at the rear side of the heat dissipation plate; the battery is electrically connected to the receiver, the multi-band light source and the heat dissipation device to provide electric energy; the receiver can receive electromagnetic waves and convert them into electric energy to charge the battery.

[0009] As an optional solution, the heat dissipation device includes an impeller and heat dissipation fins; the front side of the heat dissipation fins is connected to the heat dissipation plate; the impeller is rotatably embedded at the rear side of the heat dissipation fins.

[0010] As an optional solution, the heat dissipation device includes a mounting plate, a cover plate and a plurality of vibration units; the mounting plate is close to the heat dissipation plate, a plurality of air outlets are formed on the mounting plate, and a plurality of partition rings are arranged inside the mounting plate; the cover plate covers the mounting plate, and a plurality of air inlets are formed on the cover plate; the plurality of partition rings divide the space formed by enclosing the mounting plate and the cover plate into a plurality of concentric annular grids; the plurality of vibration units are respectively distributed corresponding to the air outlets in each of the annular grids, and when the vibration units vibrate, they can drive the surrounding air to flow and blow vertically towards the heat dissipation plate.

[0011] As an optional solution, the vibration unit includes two base plates, a lower metal spring piece, an upper metal spring piece, a lower piezoelectric ceramic and an upper piezoelectric ceramic; the two base plates are respectively arranged at both ends of the air outlet; the lower metal spring piece is arranged above the air outlet, the upper metal spring piece is arranged above the lower metal spring piece, and both ends of the lower metal spring piece and the upper metal spring piece are respectively connected to the two base plates; the lower piezoelectric ceramic is arranged on the upper surface of the lower metal spring piece, and the lower piezoelectric ceramic inputs a unidirectional pulse voltage; the upper piezoelectric ceramic is arranged on the upper surface of the upper metal spring piece, and the upper piezoelectric ceramic inputs an alternating voltage.

[0012] As an optional solution, the plurality of air outlets are evenly distributed circumferentially in each of the annular grids; the air inlets are arc-shaped, and the plurality of air inlets are arranged at intervals circumferentially and correspond to each of the annular grids.

[0013] As an optional solution, it further includes a plurality of air guide plates, and the plurality of air guide plates are radially distributed between the heat dissipation plate and the mounting plate and are connected to the heat dissipation plate.

[0014] As an optional solution, heat dissipation holes are circumferentially formed on the body corresponding to the heat dissipation device.

[0015] As an alternative solution, a light guide rod is provided along the length direction at the front end of the body, and the rear end of the light guide rod extends into the body and is close to the multi-band light source.

[0016] As an alternative solution, a reflector hood surrounding the multi-band light source is provided at the front end inside the body, and the outer periphery of the reflector hood inclines forward.

[0017] As an alternative solution, a light-shielding plate is sleeved on the front end of the body.

[0018] Due to the adoption of the above technical solutions, the present invention will have the following beneficial effects:

[0019] 1. By providing a receiver, the receiver can receive radio waves and convert them into electrical energy to continuously charge the battery. In this way, not only is it unnecessary to connect to an external power source, which is convenient for movement, but also it can prevent the irradiance of the multi-band light source from decreasing as the battery power decreases, so that it is not necessary to frequently pause work for charging; since the power of the multi-band light source is higher, more heat will be generated during operation, and since the transmission efficiency of radio waves in the air is relatively low and the energy loss is large, this part of the loss will also be converted into heat during the process of the receiver converting electrical energy; these heats are likely to accumulate in the body and cause overheating, while the receiver and the multi-band light source are connected to the front side of the heat sink, and the generated heat can be transferred to the heat sink, and the heat dissipation device is arranged at the rear side of the heat sink to quickly dissipate the heat transferred from the heat sink, thereby preventing overheating from affecting the performance, safety and lifespan of the device.

[0020] 2. By providing a plurality of vibration units on the mounting plate, these vibration units vibrate to suck air from the air inlet and discharge air from the air outlet, forming a uniformly distributed jet flow. These jet flows vertically blow towards the nearby heat sink, and the high-speed jet flow directly impacts the heat sink to form a heat dissipation convection, and also increases the static pressure of the gap between the mounting plate and the heat sink, thereby pushing the hot air out from the surroundings. This forced convection of close-range vertical jetting has a better heat dissipation effect than the slow boundary layer type heat dissipation created by a fan.

[0021] 3. Utilize the piezoelectric effect principle of the upper piezoelectric ceramic and the lower piezoelectric ceramic. When opposite voltages are applied, the upper metal spring piece and the lower metal spring piece bend towards each other, thereby simultaneously inhaling and exhaling air. When the lower piezoelectric ceramic is not in the working cycle, the upper metal spring piece bends upward to push the fresh air inhaled on the upper side to near the lower air outlet, thus completing a working cycle of air exhalation and inhalation. Since the above-mentioned high-frequency vibration method is used to push air instead of generating air flow by rotating blades like traditional fans, the upper piezoelectric ceramic and the lower piezoelectric ceramic only need very small displacements to generate effective air flow. Therefore, the thickness can be greatly reduced. Moreover, due to the relatively simple structure, high integration and miniaturized design can be achieved, thereby saving the internal space of the machine body, facilitating the integration of more functions, and improving the intelligence level of the light curing machine. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is the overall schematic diagram of the multi-band light curing machine for dental use described in the embodiment of the present invention;

[0024] Figure 2 It is the left view of the multi-band light curing machine for dental use described in the embodiment of the present invention;

[0025] Figure 3 It is the partial cross-sectional view of the multi-band light curing machine for dental use described in Embodiment 1;

[0026] Figure 4 It is the three-dimensional view of the heat dissipation device described in Embodiment 1;

[0027] Figure 5 It is the exploded view of the heat dissipation device described in Embodiment 1;

[0028] Figure 6 It is the partial cross-sectional view of the multi-band light curing machine for dental use described in Embodiment 2;

[0029] Figure 7 It is the three-dimensional view of the heat dissipation device described in Embodiment 2;

[0030] Figure 8 It is the exploded view of the heat dissipation device described in Embodiment 2;

[0031] Figure 9 It is the three-dimensional view of the vibration unit in the installed state described in Embodiment 2;

[0032] Figure 10 Front view of the vibration unit described in Embodiment 2 in the non-powered state;

[0033] Figure 11 Front view of the vibration unit described in Embodiment 2 in the state where opposite voltages are applied to the lower piezoelectric ceramic and the upper piezoelectric ceramic;

[0034] Figure 12 Front view of the vibration unit described in Embodiment 2 in the state where the lower piezoelectric ceramic is not powered and the upper piezoelectric ceramic is powered.

[0035] Reference numerals: 1, body; 11, heat dissipation holes; 2, battery; 3, heat dissipation plate; 4, receiver; 5, multi-band light source; 6, heat dissipation device; 61, impeller; 62, heat dissipation fins; 63, mounting plate; 631, air outlet; 632, partition ring; 64, cover plate; 641, air inlet; 65, vibration unit; 651, base; 652, lower metal shrapnel; 653, upper metal shrapnel; 654, lower piezoelectric ceramic; 655, upper piezoelectric ceramic; 66, air deflector; 7, light guide rod; 8, reflector; 9, light shielding plate. Detailed implementation manners

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1

[0038] Reference Figure 1 and Figure 2 , the multi-band light curing machine for dental use in this embodiment includes a body 1, a battery 2, a heat dissipation plate 3, a receiver 4, a multi-band light source 5, and a heat dissipation device 6.

[0039] Among them, the body 1 adopts the conventional design of the existing light curing machine; the battery 2 is a rechargeable lithium-ion battery, which is installed at the rear end inside the body 1 and electrically connected to the receiver 4, the multi-band light source 5, and the heat dissipation device 6 to provide electrical energy for them; the heat dissipation plate 3, the receiver 4, the multi-band light source 5, and the heat dissipation device 6 are arranged at the front end inside the body 1; the outer periphery of the heat dissipation plate 3 is fixedly connected to the inner wall of the body 1 and is coaxial with the body 1. The heat dissipation plate 3 can be made of graphite, has excellent heat conduction performance and heat dissipation uniformity, and is light in weight.

[0040] Among them, the receiver 4 is fixedly connected to the top of the front side of the heat dissipation plate 3 and directly contacts the surface of the heat dissipation plate 3. The receiver 4 is an existing radio wave charging receiver. The radio wave charging technology realizes wireless energy transmission through the transmission and reception of electromagnetic waves. Its principle includes energy conversion, signal transmission, energy reception, and electric energy conversion. The specific steps are not elaborated here; the specific model of the receiver 4 can adopt the WattUp wireless power receiver 4 (DA2210 or DA2223), which usually consists of an antenna, a rectifier, and an energy management circuit. The rectifier converts radio waves into direct current, and the energy management circuit ensures that the electric energy is stably transmitted to the battery 2 to charge the battery 2. The multi-band light source 5 is fixedly connected to the top of the front side of the heat dissipation plate 3 and directly contacts the surface of the heat dissipation plate 3. The multi-band light source 5 adopts an existing multi-band LED. The multi-band LED generates multiple wavelengths by combining multiple independent LED chips (each chip emits light of a different wavelength). These chips work together to form a composite light source.

[0041] Among them, the heat dissipation device 6 is arranged at the rear side of the heat dissipation plate 3. During operation, the heat generated by the receiver 4 and the multi-band light source 5 is transferred to the heat dissipation plate 3, and the heat dissipation device 6 quickly dissipates the heat transferred from the heat dissipation plate 3.

[0042] In the process of tooth restoration treatment in this embodiment, the transmitter converts electric energy into radio waves and sends them into the air. The receiver 4 receives the radio waves and converts them into electric energy to continuously charge the battery 2. This not only does not require connecting to an external power source, is convenient to move, but also can prevent the irradiance of the multi-band light source 5 from decreasing as the power of the battery 2 decreases; since the power of the multi-band light source 5 is higher, more heat will be generated during operation, and since the transmission efficiency of radio waves in the air is relatively low and the energy loss is large, this part of the loss will also be converted into heat during the process of the receiver 4 converting electric energy; these heats are likely to accumulate in the body 1 and cause overheating, while the receiver 4 and the multi-band light source 5 are connected to the front side of the heat dissipation plate 3, and the generated heat can be transferred to the heat dissipation plate 3. The heat dissipation device 6 is arranged at the rear side of the heat dissipation plate 3 and can quickly dissipate the heat transferred from the heat dissipation plate 3, thereby preventing overheating from affecting the performance, safety, and lifespan of the device.

[0043] As Figures 3 - 5 shown, specifically, the heat dissipation device 6 of this embodiment includes an impeller 61 and heat dissipation fins 62; the front side of the heat dissipation fins 62 is connected to the heat dissipation plate 3 and directly contacts the surface of the heat dissipation plate 3, and the heat of the heat dissipation plate 3 can be quickly diffused to a larger surface area, improving the heat dissipation efficiency; the impeller 61 is rotationally embedded at the rear side of the heat dissipation fins 62, and the impeller 61 generates air flow by rotating, accelerating the air flow around the heat dissipation fins 62 and taking away the heat.

[0044] Reference Figures 1 - 3, as a further improvement, two rows of circular heat dissipation holes 11 can be circumferentially formed on the outer periphery of the front end of the body 1 corresponding to the heat dissipation device 6. The heat taken away by the heat dissipation device 6 can be dissipated from the heat dissipation holes 11 to the outside of the body 1. A plurality of ventilation holes for air intake into the body 1 are evenly distributed on the rear end face of the body 1. These ventilation holes and the heat dissipation holes 11 form a good air duct, which can guide the cold air to flow from the rear end to the front end of the body 1, ensuring that the air directly contacts the components that need to be cooled (such as the battery 2, circuit board, display device, etc.), thereby improving the heat dissipation effect.

[0045] Reference Figures 1 - 3 , as a further improvement, a light guide rod 7 can be fixedly connected along the length direction at the front end of the body 1. The front end of the light guide rod 7 is bent to form a corner, and the rear end extends into the body 1 and is close to the multi-band light source 5. The light guide rod 7 is an existing device dedicated to conducting and distributing light, made of a transparent light guide material (such as PMMA, PC, etc.), and has good light conduction performance. When light propagates inside the light guide rod 7, through reflection and refraction, it can be evenly dispersed on the resin surface, avoiding hot spots and blind spots of light intensity, and ensuring that the resin can be evenly cured. In addition, the design of the light guide rod 7 can reduce the loss of light during transmission. The high light transmittance of the light guide material and the internal reflection mechanism (such as total internal reflection) can maximize the preservation of light energy and ensure that sufficient light intensity reaches the resin surface.

[0046] Reference Figure 3 , as a further improvement, an annular light reflector 8 can be fixedly connected at the front end inside the body 1. The light reflector 8 surrounds the outer periphery of the multi-band light source 5. The outer periphery of the light reflector 8 inclines forward, and the front side of the light reflector 8 is coated with a metal reflection layer such as aluminum or silver. In this way, the light that is originally diverged in other directions can be reflected back and redirected, so that more light is directed towards the target area for illumination, thereby improving the overall light efficiency and reducing light waste.

[0047] Reference Figures 1 - 3 , as a further improvement, a circular light shield 9 can be sleeved at the front end of the body 1. The light shield 9 is eccentrically arranged on the body 1. Since the commonly used light source of the dental light curing machine is usually an ultraviolet (UV) light source, the light shield 9 can effectively block the ultraviolet light, prevent it from leaking to the areas that do not need to be cured, protect the eyes and skin of dentists and assistants, and reduce the potential harm of ultraviolet rays to the human body.

[0048] Embodiment 2

[0049] Reference Figure 1 and Figure 2 , the dental multi-band light curing machine of this embodiment includes a body 1, a battery 2, a heat dissipation plate 3, a receiver 4, a multi-band light source 5, and a heat dissipation device 6.

[0050] Among them, the body 1 adopts the conventional design of an existing stereolithography apparatus; the battery 2 is a rechargeable lithium-ion battery, which is installed at the rear end inside the body 1 and electrically connected to the receiver 4, the multi-band light source 5 and the heat dissipation device 6 to provide electrical energy for them; the heat dissipation plate 3, the receiver 4, the multi-band light source 5 and the heat dissipation device 6 are arranged at the front end inside the body 1; the outer periphery of the heat dissipation plate 3 is fixedly connected to the inner wall of the body 1 and is coaxial with the body 1. The heat dissipation plate 3 can be made of graphite, has excellent heat conduction performance and uniform heat dissipation, and is light in weight.

[0051] Among them, the receiver 4 is fixedly connected to the top of the front side of the heat dissipation plate 3 and directly contacts the surface of the heat dissipation plate 3. The receiver 4 is an existing radio wave charging receiver. Radio wave charging technology realizes wireless energy transmission through the transmission and reception of electromagnetic waves. Its principle includes energy conversion, signal transmission, energy reception and electric energy conversion. The specific steps are not described here; the specific model of the receiver 4 can adopt the WattUp wireless power receiver 4 (DA2210 or DA2223). It usually consists of an antenna, a rectifier and an energy management circuit. The rectifier converts radio waves into direct current and ensures that the electric energy is stably transmitted to the battery 2 through the energy management circuit to charge the battery 2. The multi-band light source 5 is fixedly connected to the top of the front side of the heat dissipation plate 3 and directly contacts the surface of the heat dissipation plate 3. The multi-band light source 5 adopts an existing multi-band LED. The multi-band LED generates multiple wavelengths by combining multiple independent LED chips (each chip emits light of different wavelengths). These chips work together to form a composite light source.

[0052] Among them, the heat dissipation device 6 is arranged at the rear side of the heat dissipation plate 3. During operation, the heat generated by the receiver 4 and the multi-band light source 5 is transferred to the heat dissipation plate 3, and the heat dissipation device 6 quickly dissipates the heat transferred from the heat dissipation plate 3.

[0053] In the process of tooth restoration treatment in this embodiment, the transmitter converts electrical energy into radio waves and sends them into the air. The receiver 4 receives the radio waves and converts them into electrical energy to continuously charge the battery 2. This not only does not require connecting to an external power supply, is convenient to move, but also can prevent the irradiance of the multi-band light source 5 from decreasing as the battery 2 power decreases; since the power of the multi-band light source 5 is higher, more heat will be generated during operation. Moreover, since the transmission efficiency of radio waves in the air is relatively low and the energy loss is large, this part of the loss will also be converted into heat during the process of the receiver 4 converting electrical energy; these heats accumulate inside the body 1 and are likely to cause overheating. The receiver 4 and the multi-band light source 5 are connected to the front side of the heat dissipation plate 3 and can transfer the generated heat to the heat dissipation plate 3. The heat dissipation device 6 is arranged at the rear side of the heat dissipation plate 3 and can quickly dissipate the heat transferred from the heat dissipation plate 3, thereby preventing overheating from affecting the performance, safety and life of the equipment.

[0054] Reference Figures 6 - 8, specifically, the heat dissipation device 6 of this embodiment includes a mounting plate 63, a cover plate 64, and a plurality of vibration units 65; the mounting plate 63 is close to the heat dissipation plate 3, and the distance between the two is controlled within 1 mm. A plurality of air outlets 631 are evenly arranged on the mounting plate 63, and a plurality of partition rings 632 are provided inside the mounting plate 63; the cover plate 64 is fixedly connected to the mounting plate 63, and a plurality of arc-shaped air inlets 641 are provided on the cover plate 64; the plurality of partition rings 632 divide the space formed by enclosing the mounting plate 63 and the cover plate 64 into a plurality of concentric annular grids. The plurality of air outlets 631 are evenly distributed circumferentially in each annular grid, and the plurality of air inlets 641 are arranged at intervals circumferentially and correspond to each annular grid; the plurality of vibration units 65 are respectively distributed in each annular grid corresponding to the air outlets 631. When the vibration unit 65 vibrates, it can drive the surrounding air to flow and blow vertically towards the heat dissipation plate 3.

[0055] It should be noted that when the existing fan radiator dissipates heat, the air flow of the fan blows parallel to the heat sink. Due to the viscosity of the air, the flow velocity becomes slower and slower near the surface of the heat sink, and finally forms an air flow layer that is almost stationary, that is, the boundary layer; although the air in the layer contacts the heat source, the convection is slow. To improve the heat dissipation speed, only the fan speed can be increased to drive the boundary layer to move faster by accelerating the air flow. Therefore, the heat dissipation efficiency is low; while the vibration of the plurality of vibration units 65 in this embodiment blows the evenly distributed jets vertically towards the heat dissipation plate 3 at a short distance. The high-speed jets directly impact the heat dissipation plate 3 to form a heat dissipation convection, and increase the static pressure of the interval between the mounting plate 63 and the heat dissipation plate 3, thereby pushing the hot air out from the surrounding. This forced convection of vertical jetting at a short distance has a better heat dissipation effect than the slow boundary layer type heat dissipation manufactured by the fan.

[0056] Reference Figures 9 - 12, more specifically, the above-mentioned vibration unit 65 includes two base platforms 651, a lower metal shrapnel 652, an upper metal shrapnel 653, a lower piezoelectric ceramic 654, and an upper piezoelectric ceramic 655; the lower ends of the two base platforms 651 are respectively embedded in the inner bottom wall of the mounting disc 63 and are located at both ends of the air outlet 631; the lower metal shrapnel 652 covers above the air outlet 631 to block the air outlet 631, the upper metal shrapnel 653 is arranged at an interval above the lower metal shrapnel 652, and both ends of the lower metal shrapnel 652 and the upper metal shrapnel 653 are connected to the two base platforms 651 with a gap. Among them, the lower piezoelectric ceramic 654 is fixedly pasted on the upper surface of the lower metal shrapnel 652, and a pulsed unidirectional voltage is input to the lower piezoelectric ceramic 654. The pulsed unidirectional voltage input to the lower piezoelectric ceramic can be realized by using a PWM controller. Connect the PWM controller to the battery 2. The pulse width modulation (PWM) controller is an integrated circuit specifically used to generate pulse signals, and the average value of the output voltage can be controlled by adjusting the duty cycle of the pulse. Specifically, by adjusting the duty cycle setting of the PWM controller, the width and frequency of the output pulse are controlled. The output of the PWM controller will generate a pulse signal. Combining with an appropriate circuit configuration, this pulse signal can be converted into a pulsed DC voltage. In addition, the upper piezoelectric ceramic 655 is fixedly pasted on the upper surface of the upper metal shrapnel 653, and an alternating voltage is input to the upper piezoelectric ceramic 655 (which can be realized by connecting an inverter or other existing methods). It should be clear that piezoelectric ceramics are an existing special type of ceramic material with piezoelectric effects, that is, the characteristics of generating charges under the action of external forces or generating deformations under the action of electric fields, and are widely used in sensors, actuators, acoustic devices, medical devices, and many other fields.

[0057] When neither the upper piezoelectric ceramic 655 nor the lower piezoelectric ceramic 654 is powered on, as Figure 10 shown, neither the upper piezoelectric ceramic 655 nor the lower piezoelectric ceramic 654 deforms, and the lower metal shrapnel 652 covers above the air outlet 631 and blocks the air outlet 631; when a positive voltage is input to the upper piezoelectric ceramic 655 and the pulsed unidirectional voltage input to the lower piezoelectric ceramic 654 is in the working cycle, as Figure 11As shown, the voltage directions of the upper piezoelectric ceramic 655 and the lower piezoelectric ceramic 654 are opposite, causing the upper piezoelectric ceramic 655 to shorten and thicken, and the lower piezoelectric ceramic 654 to stretch and thin. The shortening and thickening of the upper piezoelectric ceramic 655 force the bonded upper metal spring piece 653 to bend downward, and the stretching and thinning of the lower piezoelectric ceramic 654 force the bonded lower metal spring piece 652 to bend upward. The downward bending of the upper metal spring piece 653 continuously expands the upper space and reduces the air pressure, so air is inhaled and filled through the air inlet 641. At the same time, the upward bending of the lower metal spring piece 652 opens the air outlet 631. The downward bending of the upper metal spring piece 653 will push the air and increase the static pressure near the air outlet 631, forming an air flow ejected from the air outlet 631; when the upper piezoelectric ceramic 655 inputs a reverse voltage and the pulsed unidirectional voltage input by the lower piezoelectric ceramic 654 is not in the working cycle, as Figure 12 shown, the lower piezoelectric ceramic 654 returns to its original state, causing the lower metal spring piece 652 to cover above the air outlet 631 and block the air outlet 631. The stretching and thinning of the upper piezoelectric ceramic 655 force the bonded upper metal spring piece 653 to bend upward. The upward bending of the upper metal spring piece 653 causes a high-pressure area to appear on the upper side and a low-pressure area to appear on the lower side. Since the lower metal spring piece 652 on the lower side blocks the air outlet, air cannot be inhaled from the air outlet 631. In this way, the high-pressure area pushes the freshly inhaled air to near the air outlet 631, thus completing a working cycle of jetting and inhaling air.

[0058] In the existing fan heat dissipation method, due to the influence of factors such as air flow generation and propulsion, motor size, heat dissipation requirements, and structural stability, there are certain thickness and volume limitations in the design of the fan. The thickness of common thin fan radiators is between 5 mm and 15 mm, and the size is 10x10 mm or slightly smaller; while in this embodiment, the piezoelectric effect principle of the upper piezoelectric ceramic 655 and the lower piezoelectric ceramic 654 is utilized. When opposite voltages are applied, the upper metal spring piece 653 and the lower metal spring piece 652 bend towards each other, so that air is inhaled and jetted simultaneously. When the lower piezoelectric ceramic 654 is not in the working cycle, the upward bending of the upper metal spring piece 653 pushes the freshly inhaled air on the upper side to near the lower air outlet 631. Since the vibration unit 65 in this embodiment uses the above-mentioned high-frequency vibration method to push air instead of generating air flow by rotating blades like traditional fans, high-frequency vibration can generate effective air flow with only a very small displacement, so the thickness can be greatly reduced. Moreover, because the structure is relatively simple and does not require complex blades, housings, and support structures, as well as motors with relatively large volumes, highly integrated and miniaturized designs can be achieved, thus saving the internal space of the machine body 1 and facilitating the integration of more functions, such as LED light sources, mobile phone control, etc., and improving the intelligence level of the light curing machine.

[0059] Refer to Figures 6 - 8, As a further improvement, the heat dissipation device 6 of this embodiment further includes a plurality of air guide plates 66. The air guide plates 66 are made of materials with good heat conduction performance (such as aluminum, copper). The plurality of air guide plates 66 are radially distributed between the heat dissipation plate 3 and the mounting plate 63 and are connected to the heat dissipation plate 3. These air guide plates 66 can not only increase the contact area with the airflow ejected by the vibration unit 65, improve the heat that can be dissipated per unit time, but also guide the above airflow to flow outwards after the above airflow directly impacts the heat dissipation plate 3, improving the heat dissipation efficiency.

[0060] Reference Figure 1 、 Figure 2 and Figure 6 , As a further improvement, two rows of circular heat dissipation holes 11 can be circumferentially formed on the outer periphery of the front end of the body 1 corresponding to the heat dissipation device 6. The heat taken away by the heat dissipation device 6 can be dissipated from the heat dissipation holes 11 to the outside of the body 1. A plurality of ventilation holes for introducing air into the body 1 are evenly distributed on the rear end face of the body 1. These ventilation holes and the heat dissipation holes 11 form a good air duct, which can guide the cold air to flow from the rear end to the front end of the body 1, ensuring that the air directly contacts the components that need to be cooled (such as the battery 2, circuit board, display device, etc.), thereby improving the heat dissipation effect.

[0061] Reference Figure 1 、 Figure 2 and Figure 6 , As a further improvement, a light guide rod 7 can be fixedly connected along the length direction at the front end of the body 1. The front end of the light guide rod 7 is bent to form a corner. The rear end of the light guide rod 7 extends into the body 1 and is close to the multi-band light source 5; the light guide rod 7 is an existing device dedicated to conducting and distributing light, made of transparent light guide materials (such as PMMA, PC, etc.), and has good light conduction performance. When light propagates inside the light guide rod 7, through reflection and refraction, it can be evenly dispersed on the resin surface, avoiding hot spots and blind spots of light intensity, and ensuring that the resin can be evenly cured. In addition, the design of the light guide rod 7 can reduce the loss of light during transmission. The high light transmittance of the light guide material and the internal reflection mechanism (such as total internal reflection) can maximize the preservation of the energy of light, ensuring that sufficient light intensity reaches the resin surface.

[0062] Reference Figure 6 , As a further improvement, an annular light reflecting cover 8 can be fixedly connected at the front end inside the body 1. The light reflecting cover 8 surrounds the outer periphery of the multi-band light source 5. The outer periphery of the light reflecting cover 8 is inclined forward. The front side of the light reflecting cover 8 is coated with a metal reflection layer such as aluminum or silver. In this way, the light that originally diverges in other directions can be reflected back and redirected, so that more light is directed towards the target area for illumination, thereby improving the overall light efficiency and reducing light waste.

[0063] Reference Figure 1 、 Figure 2 andFigure 6 , as a further improvement, a circular light-shielding plate 9 can be sleeved on the front end of the body 1. The light-shielding plate 9 is eccentrically arranged on the body 1 and is made of antenna material and connected to the receiver 4 to capture the electromagnetic waves emitted by the transmitter. On the one hand, since the commonly used light source of the dental light-curing machine is usually an ultraviolet (UV) light source, the light-shielding plate 9 can effectively block the ultraviolet light rays, prevent them from leaking to the areas that do not need to be cured, protect the eyes and skin of dentists and assistants, and reduce the potential harm of ultraviolet rays to the human body. On the other hand, the light-shielding plate 9 resonates with electromagnetic waves of a specific frequency through its eccentric circular ring structure, effectively captures these signals, converts these signals into current signals and inputs them into the receiver 4. In this way, the light-shielding plate 9 serves as an external antenna of the receiver 4 on the body 1, which can further save the internal space of the body 1.

[0064] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0065] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A multi-band light curing machine for dental use, characterized in that, It includes a body (1), a battery (2), a heat dissipation plate (3), a receiver (4), a multi-band light source (5) and a heat dissipation device (6); the battery (2) is arranged at the rear end inside the body (1), and the heat dissipation plate (3), the receiver (4), the multi-band light source (5) and the heat dissipation device (6) are arranged at the front end inside the body (1); the receiver (4) and the multi-band light source (5) are connected to the front side of the heat dissipation plate (3); the heat dissipation device (6) is arranged at the rear side of the heat dissipation plate (3); the battery (2) is electrically connected to the receiver (4), the multi-band light source (5) and the heat dissipation device (6) to provide electrical energy; the receiver (4) can receive electromagnetic waves and convert them into electrical energy to charge the battery (2).

2. The dental multi-band light curing machine according to claim 1, wherein The heat dissipation device (6) includes an impeller (61) and heat dissipation fins (62); the front side of the heat dissipation fins (62) is connected to the heat dissipation plate (3); the impeller (61) is rotatably embedded in the rear side of the heat dissipation fins (62).

3. The dental multi-band light curing machine according to claim 1, characterized in that, The heat dissipation device (6) includes a mounting disk (63), a cover plate (64) and a plurality of vibration units (65); the mounting disk (63) is close to the heat dissipation plate (3), a plurality of air outlets (631) are formed in the mounting disk (63), and a plurality of partition rings (632) are arranged inside the mounting disk (63); the cover plate (64) covers the mounting disk (63), and a plurality of air inlets (641) are formed in the cover plate (64); the plurality of partition rings (632) divide the space formed by enclosing the mounting disk (63) and the cover plate (64) into a plurality of concentric annular grids; the plurality of vibration units (65) are respectively distributed in each annular grid corresponding to the air outlets (631), and when the vibration units (65) vibrate, they can drive the surrounding air to flow and blow vertically towards the heat dissipation plate (3).

4. The dental multi-band light curing machine according to claim 3, characterized in that The vibration unit (65) includes two base platforms (651), a lower metal spring piece (652), an upper metal spring piece (653), a lower piezoelectric ceramic (654) and an upper piezoelectric ceramic (655); the two base platforms (651) are respectively arranged at both ends of the air outlet (631); the lower metal spring piece (652) is arranged above the air outlet (631), the upper metal spring piece (653) is arranged above the lower metal spring piece (652), and both ends of the lower metal spring piece (652) and the upper metal spring piece (653) are respectively connected to the two base platforms (651); the lower piezoelectric ceramic (654) is arranged on the upper surface of the lower metal spring piece (652), and a unidirectional pulse voltage is input to the lower piezoelectric ceramic (654); the upper piezoelectric ceramic (655) is arranged on the upper surface of the upper metal spring piece (653), and an alternating voltage is input to the upper piezoelectric ceramic (655).

5. The dental multi-band light curing machine according to claim 3 or 4, characterized in that, The plurality of air outlets (631) are uniformly distributed along the circumferential direction in each annular grid; the air inlets (641) are arc-shaped, and the plurality of air inlets (641) are arranged at intervals along the circumferential direction and correspond to each annular grid.

6. The dental multi-band light curing machine according to claim 5, characterized in that, It further includes a plurality of air guiding plates (66), and the plurality of air guiding plates (66) are radially distributed between the heat dissipation plate (3) and the mounting plate (63) and are connected to the heat dissipation plate (3).

7. The dental multi-band light curing machine according to claim 1, characterized in that, A heat dissipation hole (11) is circumferentially formed in the body (1) corresponding to the heat dissipation device (6).

8. The dental multi-band light curing machine according to claim 1, characterized in that, A light guide rod (7) is provided at the front end of the body (1) along the length direction, and the rear end of the light guide rod (7) extends into the body (1) and is close to the multi-band light source (5).

9. The dental multi-band light curing machine according to claim 1, wherein A reflector (8) surrounding the multi-band light source (5) is provided at the front end inside the body (1), and the outer periphery of the reflector (8) is inclined forward.

10. The dental multi-band light curing machine according to claim 1, characterized in that, A light shielding plate (9) is sleeved on the front end of the body (1).

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