Lead-free piezoelectric device, beauty instrument head and ultrasonic beauty instrument

Abstract

The utility model relates to the technical field of medical beauty equipment, in particular to a lead-free piezoelectric device, a beauty instrument head and an ultrasonic beauty instrument. The lead-free piezoelectric device comprises a plastic packaging shell, a piezoelectric ceramic assembly, a circuit board and a lead assembly, the piezoelectric ceramic assembly and the circuit board are arranged on the two opposite sides of the plastic packaging shell respectively and connected with the plastic packaging shell, and the lead assembly is connected with the circuit board and the piezoelectric ceramic assembly. The lead assembly comprises an inner lead and an outer lead, two ends of the inner lead are respectively connected with the piezoelectric ceramic assembly and the circuit board, and the outer lead is connected with the circuit board. By optimizing the internal structure and the arrangement mode of the piezoelectric device, it is guaranteed that energy generated by the piezoelectric device can penetrate into the skin surface layer in the working state so as to achieve the purpose of beautifying and protecting the skin, the situation that the beautifying instrument is too low in energy efficiency can be avoided, the situation that the beautifying effect is not obvious or not in time and other situations happen effectively, and the beautifying effect is improved. The use experience of the beauty instrument is optimized, and safe, stable and efficient skin care is provided.

Description

Technical Field

[0001] This utility model relates to the field of medical aesthetic machinery and equipment technology, specifically to a lead-free piezoelectric device, a beauty instrument head, and an ultrasonic beauty instrument. Background Technology

[0002] An ultrasonic beauty device is a skin rejuvenation treatment that utilizes ultrasonic technology. It promotes blood circulation and metabolism in the skin through high-frequency vibrations, achieving effects such as skin tightening and wrinkle reduction. Currently, ultrasonic beauty devices are widely used in the beauty industry and are continuously expanding into the home market. With increasing consumer demand for beauty and evolving aesthetic standards, the market prospects for ultrasonic beauty devices are very promising. In the future, with technological advancements and continuous functional improvements, ultrasonic beauty devices are expected to be applied in more fields, such as medical aesthetics and rehabilitation therapy. Furthermore, integration with technologies such as the Internet and the Internet of Things will bring even more possibilities for the development of ultrasonic beauty devices.

[0003] Currently, the core ultrasonic components of most beauty devices on the market use lead zirconate titanate (PZT) piezoelectric ceramics. This ceramic contains over 70% lead by weight. Although some protective measures are taken, such as installing a metal or plastic casing around the ceramic, using this method for improvement may result in insufficient effective energy output from the beauty device, meaning insufficient energy applied to the user's skin surface, leading to poor beauty effects. Furthermore, this improvement method makes the beauty device's structure overly complex, hindering maintenance and increasing production or beauty costs. Even with a casing, the lead content will still come into contact with the skin's surface. Lead is a toxic heavy metal; long-term exposure not only harms human health but, more importantly, causes serious environmental damage during disposal. Therefore, there is a need for a new piezoelectric ceramic that is lead-free, non-toxic, and environmentally friendly, while also simplifying the structure of the piezoelectric component or beauty device and improving its beauty effects. Utility Model Content

[0004] The purpose of this invention is to provide a lead-free piezoelectric device, a beauty device head, and an ultrasonic beauty device. This piezoelectric device is lead-free, non-toxic, and environmentally friendly, meeting the needs of sustainable development in the 21st century. By optimizing its structure, the device increases piezoelectric response and enhances vibration energy, thus meeting the performance requirements of an ultrasonic beauty device.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, the present invention provides a lead-free piezoelectric device, comprising a plastic encapsulation shell, a piezoelectric ceramic component, a circuit board, and a lead assembly. The piezoelectric ceramic component and the circuit board are respectively disposed on opposite sides of the plastic encapsulation shell and connected to the plastic encapsulation shell. The lead assembly is connected to the circuit board and the piezoelectric ceramic component.

[0007] The piezoelectric ceramic assembly includes at least one lead-free piezoelectric ceramic sheet formed of potassium sodium niobate, which is disposed opposite to the circuit board and connected to the plastic encapsulation shell.

[0008] The lead assembly includes an inner lead and an outer lead. The two ends of the inner lead are connected to the piezoelectric ceramic assembly and the circuit board, respectively, and the outer lead is connected to the circuit board.

[0009] In an optional embodiment, the lead-free piezoelectric ceramic sheet is spherical.

[0010] In an optional embodiment, the lead-free piezoelectric ceramic sheet has an outer diameter of 18-20 mm, a radius of curvature of 15-16 mm, and a thickness of 2-2.2 mm.

[0011] In an optional embodiment, the plastic encapsulation shell is a hollow ring.

[0012] In an optional embodiment, the plastic encapsulation shell has a diameter of 21-23 mm, a thickness of 0.5-1 mm, and a height of 22-24 mm.

[0013] In an optional implementation, the circuit board is a PCB board.

[0014] In an optional embodiment, the distance between the piezoelectric ceramic component and the circuit board is 10-15 mm.

[0015] In an optional implementation, the inner lead and the outer lead are connected by the same metal post.

[0016] In an optional embodiment, the piezoelectric ceramic assembly includes two potassium sodium niobate lead-free piezoelectric ceramic sheets, which are bonded together. Each potassium sodium niobate lead-free piezoelectric ceramic sheet is disposed opposite to the circuit board and connected to the plastic encapsulation shell.

[0017] Secondly, this utility model provides a beauty device head, which includes a beauty device head body and the aforementioned lead-free piezoelectric device, wherein the lead-free piezoelectric device is disposed in the beauty device head body.

[0018] In an optional embodiment, the beauty device head body includes a housing body, the top of which is provided with a first hole, and the lead-free piezoelectric device is disposed inside the first hole;

[0019] The main body of the outer shell has a cavity in the middle, which is filled with injection molding rubber to form an injection molding rubber area. The injection molding rubber area abuts against the lead-free piezoelectric device, and two second holes for wires to be led out are provided in the injection molding rubber area.

[0020] A bottom hole is provided on the side opposite to the first hole, and a bottom cover is provided in the bottom hole. The bottom cover is connected to the injection molding rubber area, and the bottom cover contains two third holes.

[0021] The two third holes are connected to the two second holes one by one, so that the lead wires can be led out, and each third hole has a lead wire post at its free end.

[0022] Thirdly, this utility model provides an ultrasonic beauty device, including a frame and a lead-free piezoelectric device as described in any of the foregoing embodiments, wherein the frame and the lead-free piezoelectric device are connected.

[0023] The beneficial effects of the lead-free piezoelectric device, beauty instrument head, and ultrasonic beauty instrument provided by this utility model embodiment include: the lead-free piezoelectric ceramic sheet formed by potassium sodium niobate in this utility model embodiment can achieve lead-free and non-toxic properties, thereby realizing green environmental protection and meeting the needs of sustainable development in the 21st century. Furthermore, by optimizing the structure, the piezoelectric response is increased and the vibration energy is enhanced, thus meeting the performance requirements of the ultrasonic beauty instrument. Specifically, by setting the lead-free piezoelectric ceramic sheet to an arc shape, it is beneficial to current transmission, improving the energy transmission effect of the beauty instrument using the lead-free piezoelectric ceramic sheet, thereby enhancing the beauty effect of the beauty instrument. At the same time, by controlling the distance between the circuit board and the lead-free piezoelectric ceramic sheet, the energy output of the beauty instrument using the lead-free piezoelectric ceramic sheet can be guaranteed, ensuring the beauty effect of the beauty instrument, while also improving its safety. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the lead-free piezoelectric device provided in Embodiment 1 of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the ultrasonic beauty device head provided in Embodiment 1 of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the lead-free piezoelectric device provided in Embodiment 2 of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the ultrasonic beauty device head provided in Embodiment 3 of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the ultrasonic beauty device provided in Embodiment 3 of this utility model.

[0030] Icons: 100 - Lead-free piezoelectric device; 110 - Plastic encapsulation shell; 120 - Piezoelectric ceramic component; 121 - Lead-free piezoelectric ceramic sheet; 130 - Circuit board; 131 - Inner lead; 132 - Outer lead; 200 - Ultrasonic beauty device; 210 - Frame; 1 - Shell body; 101 - First hole; 102 - Cavity; 2 - Injection molding rubber area; 3 - Bottom cover; 103 - Bottom hole; 301 - Second hole; 401 - Lead post; 402 - Third hole. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0036] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0037] Example 1

[0038] See Figure 1 This embodiment provides a lead-free piezoelectric device 100, which includes a plastic encapsulation shell 110. The plastic encapsulation shell 110 can be used to mount other structures or components. The plastic encapsulation shell 110 is a hollow annular shape, allowing related structures to be mounted inside the annulus and at both ends. Specifically, the plastic encapsulation shell 110 has a diameter of 21-23 mm, a thickness of 0.5-1 mm, and a height of 22-24 mm.

[0039] The lead-free piezoelectric device 100 also includes a piezoelectric ceramic assembly 120, which is disposed at one hollow end of the plastic encapsulation shell 110 and closes the open end. The piezoelectric ceramic assembly 120 is connected to the plastic encapsulation shell 110, for example, by bonding it to one end of the plastic encapsulation shell 110 with epoxy resin.

[0040] In this embodiment, the piezoelectric ceramic component 120 includes a lead-free piezoelectric ceramic sheet 121 formed of potassium sodium niobate. The potassium sodium niobate ceramic material forming the piezoelectric ceramic sheet has a piezoelectric strain coefficient d of 300-450 pc / N. 33 It has a planar electromechanical coupling coefficient K of 0.5 to 0.6. p It has a mechanical quality factor Q of 50-80. m It has a Curie temperature T of 200-250℃ C .

[0041] The lead-free piezoelectric ceramic sheet 121 is spherical. That is, the lead-free piezoelectric ceramic sheet 121 is arc-shaped, which is more conducive to current transmission and improves the energy transmission effect of the beauty device using it, thereby enhancing the beauty effect of the device. Specifically, the outer diameter of the lead-free piezoelectric ceramic sheet 121 is 18-20mm, the radius of curvature is 15-16mm, and the thickness is 2-2.2mm.

[0042] The lead-free piezoelectric device 100 also includes a circuit board 130, which is disposed at the other end of the hollow plastic encapsulation shell 110 and closes the opening end, for example, by using rubber to bond and seal the circuit board 130 to the plastic encapsulation shell 110. That is, the circuit board 130 is electrically positioned opposite the lead-free piezoelectric ceramic sheet 121, and the circuit board 130 is connected to the plastic encapsulation shell 110, for example, by bonding it to one end of the plastic encapsulation shell 110 with epoxy resin. The circuit board 130 is a PCB board.

[0043] Furthermore, the distance between the circuit board 130 and the lead-free piezoelectric ceramic sheet 121 is 10-15mm. This distance is a safe distance that does not affect the normal operation of the piezoelectric ceramic and ensures the most efficient energy output to maximize vibration efficiency. When the user's facial skin comes into contact with the lead-free piezoelectric device 100, the vibration of the lead-free piezoelectric ceramic sheet 121 delivers energy deep into the skin to a depth of 4-5mm, activating skin cells and promoting collagen production, thereby achieving the effects of firming the skin and reducing wrinkles. It is simple to use, has obvious effects, and is convenient to operate, allowing users to easily and conveniently perform beauty and skincare at home.

[0044] Furthermore, the circuit board 130 is connected to an inner lead 131 and an outer lead 132, which can be connected by a single metal conductive post or by multiple conductive posts, as long as the multiple conductive posts are connected.

[0045] Specifically, the inner lead 131 and the outer lead 132 are made of copper or aluminum wire. The two ends of the inner lead 131 are connected to the piezoelectric ceramic assembly 120 and the circuit board 130, respectively. That is, the inner lead 131 extends to the positive and negative terminals of the circuit board 130, and the outer lead 132 is then connected to the circuit board 130 to ultimately achieve current transmission. The inner lead 131 and the lead-free piezoelectric ceramic sheet 121 can be connected by soldering.

[0046] The outer lead 132 is 100-120mm long, and the inner lead 131 is 18-20mm long.

[0047] See Figure 2This embodiment also provides an ultrasonic beauty device 200, which includes a frame 210 and the aforementioned lead-free piezoelectric device 100, wherein the frame 210 and the lead-free piezoelectric device 100 are connected. Specifically, the external lead 132 is connected to the frame 210.

[0048] The frame 210 includes a power supply device, an external button, and a housing supported by the frame 210. The components and their connections within the frame 210 are all existing technologies and will not be described in detail in this embodiment. The external lead 132 is connected to the power supply device of the frame 210, thereby enabling current to be supplied to the lead-free piezoelectric ceramic sheet 121 to achieve vibration of the lead-free piezoelectric ceramic sheet 121.

[0049] The lead-free piezoelectric device 100 provided by this utility model optimizes the internal structure and arrangement of the piezoelectric device, ensuring that the energy generated by the piezoelectric device can penetrate deep into the skin surface to achieve the purpose of beauty and skin care. This avoids the situation of low energy efficiency of beauty devices, effectively preventing the occurrence of unclear or untimely beauty effects and other situations caused by low energy efficiency of beauty devices, optimizing the user's experience of using beauty devices, and providing users with safe, stable, and efficient skin care.

[0050] This ultrasonic beauty device can be a home-use ultrasonic beauty device or a desktop ultrasonic beauty device.

[0051] Example 2

[0052] See Figure 3 This utility model provides a lead-free piezoelectric device 100, whose structure is basically the same as that of the lead-free piezoelectric device 100 provided in Embodiment 1. The only difference is that in this embodiment, there are two lead-free piezoelectric ceramic sheets 121; and the lead-free piezoelectric ceramic sheets 121 are still prepared from potassium sodium niobate. The two lead-free piezoelectric ceramic sheets 121 are bonded together. The two layers of ceramic sheets can bring a larger vibration amplitude while also reducing the driving voltage, making skin care and beauty more safe and efficient.

[0053] Example 3

[0054] This utility model provides a beauty device head, in which the lead-free piezoelectric device 100 is connected to the beauty device head body. The structure of the beauty device head body is described below. Figure 4 For details on the structure of the beauty device head, please refer to [link / reference]. Figure 5 .

[0055] The beauty device head includes a housing body 1. A first hole 101 is provided at the top of the housing body 1, and a lead-free piezoelectric device 100 is disposed inside the first hole 101. A cavity 102 is provided in the middle of the housing body 1, and the cavity 102 is filled with injection-molded rubber to form an injection-molded rubber area 2. The injection-molded rubber area 2 abuts against the lead-free piezoelectric device 100. Two second holes 301 for wires to be led out are provided within the injection-molded rubber area 2. A bottom hole 103 is provided on the side opposite to the first hole 101. A bottom cover 3 is disposed within the bottom hole 103 and is connected to the injection-molded rubber area 2. The bottom cover 3 includes two third holes 402, which are connected one-to-one with the two second holes 301, allowing wires to be led out. Each third hole 402 has a lead post 401 at its free end, allowing the led-out wires to be wound around the lead post 401.

[0056] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A lead-free piezoelectric device, characterized in that, The device includes a plastic encapsulation shell, a piezoelectric ceramic component, a circuit board, and a lead assembly. The piezoelectric ceramic component and the circuit board are respectively disposed on opposite sides of the plastic encapsulation shell and connected to the plastic encapsulation shell. The lead assembly is connected to the circuit board and the piezoelectric ceramic component. The piezoelectric ceramic assembly includes at least one lead-free piezoelectric ceramic sheet formed of potassium sodium niobate, which is disposed opposite to the circuit board and connected to the plastic encapsulation shell. The lead assembly includes an inner lead and an outer lead. The two ends of the inner lead are connected to the piezoelectric ceramic assembly and the circuit board, respectively, and the outer lead is connected to the circuit board.

2. The lead-free piezoelectric device according to claim 1, characterized in that, The lead-free piezoelectric ceramic sheet is spherical.

3. The lead-free piezoelectric device according to claim 2, characterized in that, The lead-free piezoelectric ceramic sheet has an outer diameter of 18-20 mm, a radius of curvature of 15-16 mm, and a thickness of 2-2.2 mm.

4. The lead-free piezoelectric device according to claim 1, characterized in that, The plastic encapsulation shell has a diameter of 21-23 mm, a thickness of 0.5-1 mm, and a height of 22-24 mm.

5. The lead-free piezoelectric device according to claim 1, characterized in that, The distance between the piezoelectric ceramic component and the circuit board is 10-15 mm.

6. The lead-free piezoelectric device according to claim 1, characterized in that, The inner lead and the outer lead are connected by the same metal post.

7. The lead-free piezoelectric device according to claim 1, characterized in that, The piezoelectric ceramic assembly includes two lead-free piezoelectric ceramic sheets, which are bonded together. Each lead-free piezoelectric ceramic sheet is positioned opposite to the circuit board and connected to the plastic encapsulation shell.

8. A beauty device head, characterized in that, It includes a beauty device head body and a lead-free piezoelectric device as described in any one of claims 1-7, wherein the lead-free piezoelectric device is disposed in the beauty device head body.

9. The beauty device head according to claim 8, characterized in that, The beauty device head body includes a shell body, the top of the shell body is provided with a first hole, and the lead-free piezoelectric device is disposed inside the first hole; The main body of the outer shell has a cavity in the middle, which is filled with injection molding rubber to form an injection molding rubber area. The injection molding rubber area abuts against the lead-free piezoelectric device, and two second holes for wires to be led out are provided in the injection molding rubber area. A bottom hole is provided on the side opposite to the first hole. A bottom cover is installed in the bottom hole. The bottom cover is connected to the injection molding rubber area. The bottom cover has two third holes. The two third holes are connected to the two second holes one by one, so that the lead wires can be led out, and each third hole has a lead wire post at its free end.

10. An ultrasonic beauty device, characterized in that, It includes a frame and a lead-free piezoelectric device as described in any one of claims 1-7, wherein the frame and the lead-free piezoelectric device are connected.

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