Ultrasonic transducer and ultrasonic instrument

Abstract

The embodiment of the invention provides an ultrasonic transducer and an ultrasonic instrument, and belongs to the technical field of medical cosmetology. The at least two piezoelectric ceramic pieces are sequentially arranged along a first direction, a concave focusing surface is formed on the same side of each piezoelectric ceramic piece along a second direction, the focusing surface of each piezoelectric ceramic piece is focused to form a sound wave focusing area, and the sound wave focusing area of each piezoelectric ceramic piece is linearly arranged; the limit positions of the two ends of the linearly arranged sound wave focusing area are arranged in the first direction, the sound wave focusing area is located between the limit positions of the two opposite ends of the corresponding piezoelectric ceramic piece in the third direction, and the straight line perpendicular to the tangent plane of the focusing face is a target straight line. At least one target straight line of one piezoelectric ceramic piece of the at least two piezoelectric ceramic pieces intersects with at least one target straight line of the other piezoelectric ceramic piece to form a sound wave superposition area located on the side, in the second direction, of the sound wave focusing area. The ultrasonic transducer can output a sound wave focusing area and a sound wave superposition area with different depths in the second direction.

Description

Technical Field

[0001] The present application relates to the field of medical cosmetology technology, and in particular to an ultrasonic transducer and an ultrasonic instrument. Background Art

[0002] An ultrasonic transducer is an energy conversion device that converts input electrical power into ultrasonic waves, and then focuses the ultrasonic waves with higher energy onto the treatment area for treatment.

[0003] In the related art, it is difficult for an ultrasonic transducer to form energy concentration zones of different depths, and the ultrasonic transducer is inconvenient to use. Summary of the invention

[0004] In order to solve the related technical problems, the embodiments of the present application hope to provide an ultrasonic transducer and an ultrasonic instrument, so that the ultrasonic transducer can output focal areas of different depths for easy use.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] According to a first aspect of an embodiment of the present application, there is provided an ultrasonic transducer, comprising at least two piezoelectric ceramic sheets, the at least two piezoelectric ceramic sheets being arranged in sequence along a first direction, each of the piezoelectric ceramic sheets being formed with a concave focusing surface on one side along a second direction, the second direction being arranged crosswise with the first direction, each of the focusing surfaces being located on the same side of the piezoelectric ceramic sheets, the focusing surface of each of the piezoelectric ceramic sheets being focused into an acoustic wave focusing area, the acoustic wave focusing area of ​​each of the piezoelectric ceramic sheets being arranged in a linear manner, the extreme positions at both ends of the acoustic wave focusing areas arranged in a linear manner being arranged along the first direction, the acoustic wave focusing area being located between the extreme positions at the opposite ends of the corresponding piezoelectric ceramic sheets along a third direction, the straight line perpendicular to the tangent plane of the focusing surface being a target straight line, and at least one target straight line of one of the at least two piezoelectric ceramic sheets intersecting with at least one target straight line of another piezoelectric ceramic sheet to form an acoustic wave superposition area, the acoustic wave superposition area being located on one side of the acoustic wave focusing area along the second direction.

[0007] In one embodiment, each of the piezoelectric ceramic sheets is symmetrically arranged about a preset plane, and the preset plane is parallel to the first direction and the second direction respectively. The preset plane intersects with the focusing plane to form a preset intersection line, and the target straight line intersecting with the preset intersection line is a reference line. Among at least two of the piezoelectric ceramic sheets, the reference line of one of the piezoelectric ceramic sheets intersects with the reference line of the other piezoelectric ceramic sheet.

[0008] In one embodiment, in every two piezoelectric ceramic sheets, the reference line of one of the piezoelectric ceramic sheets intersects with the reference line of the other piezoelectric ceramic sheet.

[0009] In one embodiment, the preset intersection line is a straight line, and in at least two of the piezoelectric ceramic sheets, an angle between the preset intersection line of one of the piezoelectric ceramic sheets and the preset intersection line of the other piezoelectric ceramic sheet is greater than zero.

[0010] In one embodiment, the preset intersection line is a curve, and among at least two of the piezoelectric ceramic sheets, a curvature of the preset intersection line of one of the piezoelectric ceramic sheets is equal to or unequal to a curvature of the preset intersection line of the other piezoelectric ceramic sheet.

[0011] In one embodiment, at least two of the piezoelectric ceramic sheets are connected in parallel, so that each of the piezoelectric ceramic sheets can be independently controlled to form the acoustic wave focusing region.

[0012] In one embodiment, the ultrasonic transducer includes a separation layer located between adjacent piezoelectric ceramic sheets, the separation layer is connected to the piezoelectric ceramic sheets on both sides respectively, and the acoustic impedance of the separation layer is different from the acoustic impedance of the piezoelectric ceramic sheets.

[0013] In one embodiment, the ratio of the acoustic impedance value of the separation layer to the acoustic impedance value of the piezoelectric ceramic sheet is a target ratio, the target ratio is greater than or equal to 10, and the target ratio is less than or equal to 0.1.

[0014] In one embodiment, each of the piezoelectric ceramic sheets is provided with a corresponding cathode and anode, the anode of each of the piezoelectric ceramic sheets is separated by the separation layer, and the metal electrodes connect the cathodes corresponding to the piezoelectric ceramic sheets.

[0015] A second aspect of the embodiments of the present application provides an ultrasonic instrument, comprising the above-mentioned ultrasonic transducer, wherein the number of the ultrasonic transducer is at least one;

[0016] A housing is formed with a housing cavity, wherein the ultrasonic transducer is located in the housing cavity;

[0017] A cover plate, covering the accommodating cavity;

[0018] The sound-transmitting window is arranged on a shell wall of the shell body on one side along the second direction, and the cover plate is arranged opposite to the sound-transmitting window along the second direction.

[0019] In one embodiment, the ultrasonic instrument includes at least two ultrasonic transducers, all of the ultrasonic transducers are arranged in sequence along the third direction, and the corresponding piezoelectric ceramic sheets in at least two of the ultrasonic transducers are connected in series.

[0020] In one embodiment, the ultrasonic transducers located at both ends of the third direction, one of which is a first transducer, and a metal electrode connects the cathodes of the piezoelectric ceramic sheets of the first transducer, wherein the other ultrasonic transducer is a second transducer, and the anodes of the piezoelectric ceramic sheets of the second transducer are isolated from each other, and the piezoelectric ceramic sheets corresponding to every two adjacent ultrasonic transducers are connected in series.

[0021] In one embodiment, the ultrasound instrument includes an imaging probe, at least one of the ultrasound transducers is provided with an opening, the opening is used for installing the imaging probe, and the sound-transmitting window is transparent.

[0022] In one embodiment, the ultrasonic instrument includes a buffer pad located in the accommodating cavity, and the ultrasonic transducer is located on the buffer pad.

[0023] In one embodiment, a stage is disposed on the shell, the stage has a groove that is sunken along the second direction toward a side away from the ultrasonic transducer, and the buffer pad is disposed in the groove.

[0024] In one embodiment, the inner wall of the shell has a glue storage groove which is recessed along the first direction and the third direction toward a side away from the accommodating cavity, the cover plate is arranged on the groove wall of the glue storage groove along the second direction, and sealant is provided on the side of the cover plate away from the ultrasonic transducer, and the groove wall of the glue storage groove can limit the sealant from entering the accommodating cavity.

[0025] In one embodiment, the ultrasonic instrument is an ultrasonic beauty instrument.

[0026] An ultrasonic transducer and an ultrasonic instrument provided by an embodiment of the present application, wherein the acoustic wave focusing area formed by each piezoelectric ceramic sheet is arranged in a linear shape, at least two piezoelectric ceramic sheets are arranged along a first direction, and the acoustic wave focusing areas formed by each piezoelectric ceramic sheet are arranged along the first direction, and the ultrasonic transducer can output a linear acoustic wave focusing area along the first direction, so that the ultrasonic transducer can output a row of acoustic wave focusing areas at the same time, and the ultrasonic transducer does not need to move along the first direction, and the ultrasonic transducer only needs to move along a third direction to output multiple rows of acoustic wave focusing areas, forming a matrix-shaped acoustic wave focusing area, thereby reducing the heat diffusion and heat accumulation effects caused by outputting a single-point focusing. The ultrasonic transducer forms a row of acoustic wave focusing areas, and the ultrasonic transducer can form an acoustic wave superposition area as needed, and the acoustic wave superposition area is on one side of the acoustic wave focusing area along the second direction, and the ultrasonic transducer can output acoustic wave focusing areas and acoustic wave superposition areas of different depths along the second direction, and the ultrasonic transducer can treat areas of different depths, and the ultrasonic transducer has strong flexibility in use, and the ultrasonic transducer does not need other structural assistance to output energy concentration areas of different depths, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of an ultrasonic transducer according to an embodiment of the present application, which shows a sound wave focusing area;

[0028] Figure 2 This is a schematic diagram of the structure of an ultrasonic transducer according to an embodiment of the present application;

[0029] Figure 3 for Figure 2 A cross-sectional view at AA in the middle shows the acoustic wave superposition area;

[0030] Figure 4 This is a schematic diagram of the ultrasonic transducers connected in series according to an embodiment of the present application;

[0031] Figure 5 An exploded schematic diagram of an ultrasonic instrument according to an embodiment of the present application;

[0032] Figure 6 This is a cross-sectional view of the structure of the ultrasonic instrument according to an embodiment of the present application.

[0033] Description of Reference Numerals

[0034] 1. Cover plate; 2. Ultrasonic transducer; 21. Piezoelectric ceramic sheet; 211; Focusing surface; 212. Target straight line; 213. Preset intersection line; 214. Reference line; 22. Separation layer; 23. Cathode; 24. Anode; 25. First transducer; 26. Second transducer; 27. Opening; 28. Wire; 29. ​​Third transducer; 3. Shell; 31. Stage; 311. Groove; 32. Glue storage tank; 321. Groove wall; 33. Accommodating cavity; 4. Sound-transmitting window; 5. Buffer pad; 6. Sound wave focusing area; 7. Sound wave superposition area; 8. Preset plane. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0037] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the specific corresponding schematic diagrams, which may be the left and right directions in normal use or not.

[0038] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or apparatus including the element. "Multiple" means greater than or equal to two.

[0039] In the related art, the ultrasonic transducer outputs an ultrasonic focusing area with linear or point distribution. The ultrasonic focusing area output by the ultrasonic transducer is a single energy concentration area in the depth direction. The ultrasonic transducer does not form multiple energy concentration areas arranged along the depth direction. It is difficult for the ultrasonic transducer to form energy concentration areas with different depths, and the ultrasonic transducer is inconvenient to use.

[0040] An ultrasonic transducer 2 provided in the embodiment of the present application is shown in FIG. Figure 1 , Figure 2 and Figure 3 The ultrasonic transducer 2 includes at least two piezoelectric ceramic sheets 21, which are arranged in sequence along a first direction. A concave focusing surface 211 is formed on one side of each piezoelectric ceramic sheet 21 along a second direction. The second direction is arranged crosswise with the first direction. Each focusing surface 211 is located on the same side of the piezoelectric ceramic sheet 21. The focusing surface 211 of each piezoelectric ceramic sheet 21 is focused into an acoustic wave focusing area 6. The acoustic wave focusing area 6 of each piezoelectric ceramic sheet 21 is arranged linearly. The extreme positions at both ends are arranged along the first direction, the acoustic wave focusing area 6 is located between the extreme positions at the opposite ends of the corresponding piezoelectric ceramic sheets 21 along the third direction, the straight line perpendicular to the tangent plane of the focusing surface 211 is the target straight line 212, and at least one target straight line 212 of one piezoelectric ceramic sheet 21 of at least two piezoelectric ceramic sheets 21 intersects with at least one target straight line 212 of the other piezoelectric ceramic sheet 21 to form an acoustic wave superposition area 7, and the acoustic wave superposition area 7 is located on one side of the acoustic wave focusing area 6 along the second direction.

[0041] Exemplarily, the piezoelectric ceramic piece 21 is arched, the focusing surface 211 is the inner curved surface of the arch, and the third direction is the direction in which the arch feet are arranged.

[0042] Exemplarily, the cross section of the piezoelectric ceramic sheet 21 in the second direction is arc-shaped.

[0043] Exemplarily, when the focusing plane 211 is a curved surface, the tangent plane of the focusing plane 211 is a plane tangent to the focusing plane 211 ; when the focusing plane 211 is a plane, the tangent plane of the focusing plane 211 is the focusing plane 211 itself.

[0044] It can be understood that both the sound wave superposition area 7 and the sound wave focusing area 6 are areas where ultrasonic wave energy is concentrated, and the sound wave superposition area 7 and the sound wave focusing area 6 are located at different positions along the second direction.

[0045] It can be understood that the depth refers to the distance in the second direction.

[0046] Exemplarily, the number of the piezoelectric ceramic sheets 21 is not limited, and the number of the piezoelectric ceramic sheets 21 may be 2, 3, 4, or 5.

[0047] It can be understood that both the sound wave focusing area 6 and the sound wave superposition area 7 are energy gathering areas.

[0048] In the embodiment of the present application, the acoustic wave focusing area 6 formed by each piezoelectric ceramic sheet 21 is arranged linearly, at least two piezoelectric ceramic sheets 21 are arranged along the first direction, and the acoustic wave focusing areas 6 formed by each piezoelectric ceramic sheet 21 are arranged along the first direction. The ultrasonic transducer 2 can output linear acoustic wave focusing areas 6 along the first direction, so that the ultrasonic transducer 2 can output a row of acoustic wave focusing areas 6 at the same time. The ultrasonic transducer 2 does not need to move along the first direction. The ultrasonic transducer 2 only needs to move along the third direction to output multiple rows of acoustic wave focusing areas 6, forming a matrix-shaped acoustic wave focusing area 6, thereby reducing the heat diffusion and heat accumulation effects caused by the output single-point focusing. The ultrasonic transducer 2 forms a row of sound wave focusing areas 6. The ultrasonic transducer 2 can form a sound wave superposition area 7 as needed. The sound wave superposition area 7 is on one side of the sound wave focusing area 6 along the second direction. The ultrasonic transducer 2 can output the sound wave focusing areas 6 and the sound wave superposition areas 7 at different depths along the second direction. The ultrasonic transducer 2 can treat areas at different depths. The ultrasonic transducer 2 has strong flexibility in use. The ultrasonic transducer 2 outputs energy concentration areas at different depths without the assistance of other structures, and is easy to use.

[0049] For the convenience of explanation, as shown in the figure, the direction indicated by the arrow R1 in the figure is the first direction, the direction indicated by the arrow R2 in the figure is the second direction, and the direction indicated by the arrow R3 in the figure is the third direction.

[0050] Exemplarily, the first direction intersects the second direction perpendicularly, the second direction intersects the third direction perpendicularly, and the first direction intersects the third direction perpendicularly.

[0051] In one embodiment, please refer to Figure 2 and Figure 3 Each piezoelectric ceramic sheet 21 is symmetrically arranged about a preset plane 8, the preset plane 8 is parallel to the first direction and the second direction respectively, the preset plane 8 intersects with the focusing plane 211 to form a preset intersection line 213, and the target straight line 212 intersecting with the preset intersection line 213 is a reference line 214. Among at least two piezoelectric ceramic sheets 21, the reference line 214 of one piezoelectric ceramic sheet 21 intersects with the reference line 214 of the other piezoelectric ceramic sheet 21.

[0052] Exemplarily, the reference line 214 may coincide with a boundary of the piezoelectric ceramic sheet 21 .

[0053] In the embodiment of the present application, the preset plane 8 is the symmetry plane of each piezoelectric ceramic piece 21, and the position of the preset plane 8 is relatively easy to determine. The preset intersection line 213 can be determined based on the preset plane 8 and the focusing plane 211, and the reference line 214 can be determined based on the preset intersection line 213. The area where the reference line 214 intersects is the approximate center position of the sound wave superposition area 7, which can better determine the position of the sound wave superposition area 7, and is conducive to more accurate use of the sound wave superposition area 7 for treatment.

[0054] It is understandable that the piezoelectric ceramic sheet 21 is not limited to being symmetrical about the preset plane 8. Exemplarily, the preset plane 8 may be a plane other than the symmetry plane of the piezoelectric ceramic sheet 21.

[0055] In one embodiment, please refer to Figure 2 and Figure 3 In every two piezoelectric ceramic sheets 21 , the reference line 214 of one piezoelectric ceramic sheet 21 intersects with the reference line 214 of the other piezoelectric ceramic sheet 21 .

[0056] In the embodiment of the present application, among every two piezoelectric ceramic sheets 21, the reference line 214 of one piezoelectric ceramic sheet 21 intersects with the reference line 214 of the other piezoelectric ceramic sheet 21, and the reference lines 214 and the reference lines 214 intersect to form a sound wave superposition area 7. The reference lines 214 of every two piezoelectric ceramic sheets 21 can intersect, and a sound wave superposition area 7 can be formed between every two piezoelectric ceramic sheets 21. The sound wave superposition area 7 can be formed by arbitrarily controlling two piezoelectric ceramic sheets 21, and the sound wave superposition area 7 can be flexibly controlled.

[0057] It is understandable that, among every two piezoelectric ceramic sheets 21, the reference line 214 of one piezoelectric ceramic sheet 21 is not limited to intersecting with the reference line 214 of another piezoelectric ceramic sheet 21. Exemplarily, the number of the piezoelectric ceramic sheets 21 is three, the reference lines 214 of two adjacent piezoelectric ceramic sheets 21 intersect, and the reference lines 214 of the alternate piezoelectric ceramic sheets 21 do not intersect.

[0058] In one embodiment, the preset intersection line 213 is a straight line, and the angle between the preset intersection line 213 of one piezoelectric ceramic sheet 21 and the preset intersection line 213 of the other piezoelectric ceramic sheet 21 among at least two piezoelectric ceramic sheets 21 is greater than zero.

[0059] It is understandable that the angle between the preset intersection line 213 of one piezoelectric ceramic sheet 21 and the preset intersection line 213 of another piezoelectric ceramic sheet 21 is greater than zero, indicating that the preset intersection line 213 of one piezoelectric ceramic sheet 21 intersects with the preset intersection line 213 of the other piezoelectric ceramic sheet 21.

[0060] In the embodiment of the present application, the preset intersection line 213 is a straight line, the part where the piezoelectric ceramic sheet 21 intersects with the preset plane 8 is flat, the preset intersection lines 213 of at least two piezoelectric ceramic sheets 21 intersect to form an acoustic wave superposition area 7, and the part where the piezoelectric ceramic sheet 21 intersects with the preset plane 8 is flat, which facilitates the manufacture of the piezoelectric ceramic sheet 21.

[0061] In one embodiment, please refer to Figure 2 and Figure 3 The preset intersection line 213 is a curve, and among at least two piezoelectric ceramic sheets 21 , the curvature of the preset intersection line 213 of one piezoelectric ceramic sheet 21 is equal to or unequal to the curvature of the preset intersection line 213 of the other piezoelectric ceramic sheet 21 .

[0062] Exemplarily, among at least two piezoelectric ceramic sheets 21, the curvature of the preset intersection line 213 of one piezoelectric ceramic sheet 21 is equal to the curvature of the preset intersection line 213 of the other piezoelectric ceramic sheet 21, which means that the curvatures of at least two piezoelectric ceramic sheets 21 are the same and have regular shapes. The piezoelectric ceramic sheet 21 may be ellipsoidal or approximately spherical.

[0063] In the embodiment of the present application, the preset intersection line 213 is a curve, and the linear acoustic wave focusing area 6 formed by each piezoelectric ceramic sheet 21 changes smoothly, which reduces the situation where the end mutation of the acoustic wave focusing area 6 of the adjacent piezoelectric ceramic sheet 21 causes a large energy change, which is conducive to the uniform distribution of ultrasonic energy. Among at least two piezoelectric ceramic sheets 21, the curvature of the preset intersection line 213 of one piezoelectric ceramic sheet 21 is equal to the curvature of the preset intersection line 213 of the other piezoelectric ceramic sheet 21, and the shapes of at least two piezoelectric ceramic sheets 21 are regular, so that the shape of the acoustic wave focusing area 6 can be relatively regular.

[0064] Exemplarily, the curvature of the piezoelectric ceramic sheet 21 affects the depths of the acoustic wave focusing region 6 and the acoustic wave superposition region 7 in the second direction.

[0065] Exemplarily, the curvature of the piezoelectric ceramic sheet 21 is set according to the depth of the required focusing area.

[0066] In one embodiment, at least two piezoelectric ceramic sheets 21 are connected in parallel, so that each piezoelectric ceramic sheet 21 can be independently controlled to form an acoustic wave focusing region 6 .

[0067] In the embodiment of the present application, at least two piezoelectric ceramic sheets 21 are connected in parallel, so that each piezoelectric ceramic sheet 21 can be independently controlled to form an acoustic wave focusing area 6. When the entire area needs to be treated, all piezoelectric ceramic sheets 21 can be connected to form a larger acoustic wave focusing area 6 and an acoustic wave superposition area 7, thereby speeding up the treatment. When some positions in the area do not require ultrasonic treatment, only some of the piezoelectric ceramic sheets 21 can be connected as needed to form an acoustic wave focusing area 6 and an acoustic wave superposition area 7 at appropriate positions of the piezoelectric ceramic sheets 21, so that the acoustic wave focusing area 6 and the acoustic wave superposition area 7 can avoid positions that do not require treatment, and the ultrasonic transducer 2 is flexible to use.

[0068] It is understandable that the at least two piezoelectric ceramic sheets 21 are not limited to being connected in parallel. Exemplarily, the at least two piezoelectric ceramic sheets 21 are connected in series.

[0069] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 5 The ultrasonic transducer 2 includes a separation layer 22 located between adjacent piezoelectric ceramic sheets 21 . The separation layer 22 is connected to the piezoelectric ceramic sheets 21 on both sides respectively. The acoustic impedance of the separation layer 22 is different from the acoustic impedance of the piezoelectric ceramic sheets 21 .

[0070] By way of example, the separation layer 22 may be air.

[0071] Exemplarily, the separation layer 22 may be a stainless steel plate.

[0072] By way of example, the spacer layer 22 may be corundum.

[0073] In the embodiment of the present application, the acoustic impedance of the separation layer 22 is different from the acoustic impedance of the piezoelectric ceramic sheet 21. The separation layer 22 can suppress the acoustic conduction between adjacent piezoelectric ceramic sheets 21, reduce the influence of the unconnected piezoelectric ceramic sheets 21 by the sound waves generated by the adjacent piezoelectric ceramic sheets 21, and the ultrasonic transducer 2 has a good use effect.

[0074] It is understandable that the separation layer 22 is not limited to be disposed between adjacent piezoelectric ceramic sheets 21. Exemplarily, adjacent piezoelectric ceramic sheets 21 are in contact.

[0075] In one embodiment, the ratio of the acoustic impedance value of the separation layer 22 to the acoustic impedance value of the piezoelectric ceramic sheet 21 is a target ratio, the target ratio is greater than or equal to 10, and the target ratio is less than or equal to 0.1.

[0076] Illustratively, the target ratio may be 10, 20, 50, 0.009 or 0.001.

[0077] In the embodiment of the present application, the target ratio is greater than or equal to 10, and the target ratio is less than or equal to 0.1. The acoustic impedance value difference between the separation layer 22 and the piezoelectric ceramic sheet 21 is relatively large, so that the separation layer 22 can better suppress the acoustic conduction between adjacent piezoelectric ceramic sheets 21.

[0078] It is understood that the target ratio is not limited to being greater than or equal to 10, and the target ratio is not limited to being less than or equal to 0.1. For example, the target ratio may be 9.9 or 0.11.

[0079] In one embodiment, please refer to Figure 5 Each piezoelectric ceramic sheet 21 is provided with a corresponding cathode 23 and an anode 24 . The anode 24 of each piezoelectric ceramic sheet 21 is separated by a separation layer 22 . The metal electrodes connect the cathodes 23 corresponding to each piezoelectric ceramic sheet 21 .

[0080] It should be noted that the cathode 23 of the piezoelectric ceramic piece 21 is connected to the power supply device through the wire 28, and the anode 24 of the piezoelectric ceramic piece 21 is connected to the power supply device through the wire 28, so that the piezoelectric ceramic piece 21 is energized to generate ultrasonic waves.

[0081] Exemplarily, the cathode 23 and the anode 24 of the piezoelectric ceramic sheet 21 are arranged along the third direction.

[0082] In the embodiment of the present application, the anode 24 of each piezoelectric ceramic sheet 21 is separated by a separation layer 22, and the anode 24 of each piezoelectric ceramic sheet 21 has a corresponding connected wire 28 to individually control each piezoelectric ceramic sheet 21. The metal electrode connects the cathodes 23 corresponding to each piezoelectric ceramic sheet 21 so that each piezoelectric ceramic sheet 21 shares a common cathode 23. Each piezoelectric ceramic sheet 21 only needs one wire 28 to be energized, which reduces the number of wires 28, improves the space utilization of the ultrasonic transducer 2, simplifies the structure of the wire 28, and makes the ultrasonic transducer 2 easy to install.

[0083] It is understandable that the anodes 24 of each piezoelectric ceramic sheet 21 are not limited to being separated by the separation layer 22, and the metal electrode is not limited to connecting the cathodes 23 corresponding to each piezoelectric ceramic sheet 21. Exemplarily, the cathodes 23 of each piezoelectric ceramic sheet 21 are separated by the separation layer 22, and the metal electrode connects the anodes 24 corresponding to each piezoelectric ceramic sheet 21.

[0084] In one embodiment, the ratio of the acoustic impedance value of the metal electrode to the acoustic impedance value of the piezoelectric ceramic is a reference ratio, the reference ratio is greater than or equal to 10, and the reference ratio is less than or equal to 0.1.

[0085] The present application embodiment provides an ultrasonic instrument. Figure 5 and Figure 6The ultrasonic instrument includes an ultrasonic transducer 2, a shell 3, a cover plate 1 and a sound-transmitting window 4. The number of the ultrasonic transducer 2 is at least one. The shell 3 is formed with a accommodating cavity 33. The ultrasonic transducer 2 is located in the accommodating cavity 33. The cover plate 1 is covered on the accommodating cavity 33. The sound-transmitting window 4 is arranged on the shell wall of the shell 3 on one side along the second direction. The cover plate 1 and the sound-transmitting window 4 are arranged opposite to each other along the second direction.

[0086] It can be understood that the focusing plane 211 is located on the side of the piezoelectric ceramic plate 21 facing the sound-transmitting window 4 .

[0087] It should be noted that the accommodating cavity 33 is provided with liquid for transmitting ultrasonic energy.

[0088] It can be understood that the housing 3 has a communication port communicating with the accommodating chamber 33 , and the cover plate 1 is disposed on the communication port to close the accommodating chamber 33 .

[0089] In the embodiment of the present application, the ultrasonic transducer 2 is arranged in the accommodating cavity 33 of the shell 3. The shell 3 can limit the transmission of ultrasonic waves. The ultrasonic energy generated by the ultrasonic transducer 2 forms a sound wave focusing area 6 and a sound wave superposition area 7 of varying depths in the second direction through the sound-transmitting window 4. The ultrasonic instrument can treat areas of different depths and has strong flexibility in use.

[0090] It can be understood that the number of ultrasonic transducers 2 is not limited.

[0091] In one embodiment, please refer to Figure 4 and Figure 5 The ultrasonic instrument includes at least two ultrasonic transducers 2, all of the ultrasonic transducers 2 are arranged in sequence along a third direction, and corresponding piezoelectric ceramic sheets 21 in at least two ultrasonic transducers 2 are connected in series.

[0092] Exemplarily, the number of ultrasonic transducers 2 is 2, 3, 4 or 5.

[0093] In the embodiment of the present application, the number of ultrasonic transducers 2 is at least two, each ultrasonic transducer 2 can form an acoustic wave focusing area 6 arranged along a first direction, all ultrasonic transducers 2 are arranged in sequence along a third direction, the corresponding piezoelectric ceramic sheets 21 in at least two ultrasonic transducers 2 are connected in series, at least two rows of acoustic wave focusing areas 6 are arranged along the third direction, and the ultrasonic instrument can simultaneously output matrix-shaped acoustic wave focusing areas 6 along the first direction and along the third direction, and can perform ultrasonic treatment on an area at the same time, thereby improving the treatment efficiency of the ultrasonic instrument, and can output a focusing area without moving the ultrasonic instrument, which can reduce the mechanism of moving the ultrasonic transducer 2 and simplify the structure of the ultrasonic instrument.

[0094] It is understandable that all ultrasonic transducers 2 are not limited to being arranged in sequence along the third direction. For example, all ultrasonic transducers 2 are not limited to being arranged in sequence along the first direction.

[0095] In one embodiment, please refer to Figure 4 and Figure 5 , ultrasonic transducers 2 are located at both ends of the third direction, one of the ultrasonic transducers 2 is a first transducer 25, and the metal electrode connects the cathodes 23 of each piezoelectric ceramic piece 21 of the first transducer 25, and the other ultrasonic transducer 2 is a second transducer 26, and the anodes 24 of each piezoelectric ceramic piece 21 of the second transducer 26 are isolated from each other, and the piezoelectric ceramic pieces 21 corresponding to every two adjacent ultrasonic transducers 2 are connected in series.

[0096] Exemplarily, the anodes 24 of the piezoelectric ceramic plates 21 of the second transducer 26 are isolated by the separation layer 22 .

[0097] It should be noted that when the number of ultrasonic transducers 2 is two, the piezoelectric ceramic sheet 21 of the first transducer 25 and the piezoelectric ceramic sheet 21 corresponding to the second transducer 26 are connected in series, that is, the cathode 23 of the first transducer 25 is connected to the wire 28, the anode 24 of the first transducer 25 is connected to the cathode 23 of the second transducer 26, and the anode 24 of the second transducer 26 is connected to the wire 28; when the number of ultrasonic transducers 2 is three or more, the ultrasonic transducer 2 located between the first transducer 25 and the second transducer 26 is the third transducer 2. Transducer 29, the piezoelectric ceramic piece 21 of the first transducer 25 is connected in series with the piezoelectric ceramic piece 21 corresponding to the third transducer 29, and the piezoelectric ceramic piece 21 of the third transducer 29 is connected in series with the piezoelectric ceramic piece 21 corresponding to the second transducer 26, that is, the cathode 23 of the first transducer 25 is connected to the wire 28, the anode 24 of the first transducer 25 is connected to the cathode 23 of the third transducer 29, the anode 24 of the third transducer 29 is connected to the cathode 23 of the second transducer 26, and the anode 24 of the second transducer 26 is connected to the wire 28.

[0098] It should be noted that the piezoelectric ceramic sheets 21 corresponding to each two adjacent ultrasonic transducers 2 are connected in series, which means that the piezoelectric ceramic sheet 21 of one ultrasonic transducer 2 and the adjacent piezoelectric ceramic sheet 21 of the other ultrasonic transducer 2 are connected in series. Figure 4 , among two adjacent ultrasonic transducers 2, the first piezoelectric ceramic piece 21 from the left of one ultrasonic transducer 2 is connected in series with the first piezoelectric ceramic piece 21 from the left of the other ultrasonic transducer 2, and the second piezoelectric ceramic piece 21 from the left of one ultrasonic transducer 2 is connected in series with the second piezoelectric ceramic piece 21 from the left of the other ultrasonic transducer 2. For example, see Figure 4The piezoelectric ceramic piece 21a of the first transducer 25 is connected in series with the adjacent piezoelectric ceramic piece 21b of the third transducer 29, the piezoelectric ceramic piece 21b of the third transducer 29 is connected in series with the adjacent piezoelectric ceramic piece 21c of the second transducer 26, and the piezoelectric ceramic piece 21d of the third ultrasonic transducer 2 is connected in series with the adjacent piezoelectric ceramic piece 21e of the second ultrasonic transducer 2.

[0099] In the embodiment of the present application, the anodes 24 of each piezoelectric ceramic piece 21 of the second transducer 26 are isolated from each other, and each anode 24 of the second transducer 26 has a corresponding connected wire 28 to individually control each piezoelectric ceramic piece 21. The metal electrode connects the cathodes 23 of each piezoelectric ceramic piece 21 of the first transducer 25 so that the piezoelectric ceramic pieces 21 of the first transducer 25 share the cathode 23, thereby reducing the number of wires 28, improving the space utilization rate of the ultrasonic instrument, simplifying the structure of the wire 28, and making the ultrasonic instrument easier to install.

[0100] It is understandable that the metal electrode is not limited to connecting the cathodes 23 of the piezoelectric ceramic sheets 21 of the first transducer 25. Exemplarily, the cathodes 23 of the piezoelectric ceramic sheets 21 of the first transducer 25 are isolated from each other.

[0101] In one embodiment, please refer to Figure 5 The cover plate 1 is provided with wire outlet holes, and the wires 28 pass through the wire outlet holes and extend into the accommodating cavity 33 to be connected with the cathode 23 and the anode 24.

[0102] Exemplarily, the diameter of the wire outlet hole is 4 mm.

[0103] In one embodiment, please refer to Figure 5 The wires 28 connected to the anodes 24 of the piezoelectric ceramic sheets 21 are twisted together, and the connector brings the anode 24 wires 28 together and passes through the outlet hole of the cover plate 1.

[0104] In one embodiment, please refer to Figure 5 and Figure 6 The ultrasonic instrument includes an imaging probe, at least one ultrasonic transducer 2 is provided with an opening 27, the opening 27 is used to install the imaging probe, and the sound-transmitting window 4 is transparent.

[0105] Exemplarily, the imaging probe is a B-ultrasound imaging probe.

[0106] Exemplarily, the imaging probe is a camera.

[0107] In the embodiment of the present application, the imaging probe can diagnose and monitor the focus area in real time, and the ultrasonic instrument can realize ultrasonic focusing therapy and ultrasonic imaging diagnosis, enriching the function of the ultrasonic instrument. The imaging probe is installed in the opening 27 on the ultrasonic transducer 2, and the sound-transmitting window 4 is transparent. While performing ultrasonic focusing therapy, the imaging probe is used to monitor the ultrasonic focusing area in real time to improve the effect of ultrasonic therapy.

[0108] It is understandable that the ultrasound instrument is not limited to including an imaging probe. For example, the ultrasound instrument may not be provided with an imaging probe.

[0109] In one embodiment, please refer to Figure 5 and Figure 6 The opening 27 is arranged at the position of the preset plane 8 of the ultrasonic transducer 2 , and the opening 27 is symmetrical with respect to the preset plane 8 .

[0110] In the embodiment of the present application, the ultrasonic transducer 2 is symmetrical about the preset plane 8 , and the openings 27 are arranged at symmetrical positions of the ultrasonic transducer 2 , so as to reduce the influence of the openings 27 on the sound wave focusing area 6 formed by the ultrasonic transducer 2 .

[0111] In one embodiment, please refer to Figure 5 and Figure 6 The ultrasonic instrument includes a buffer pad 5 located in the accommodating cavity 33 , and the ultrasonic transducer 2 is located on the buffer pad 5 .

[0112] Exemplarily, the buffer pad 5 is a silicone pad.

[0113] In the embodiment of the present application, the ultrasonic transducer 2 is located on the buffer pad 5, and the buffer pad 5 can buffer the vibration of the ultrasonic transducer 2 when it is working, reduce the damage to the shell 3 caused by the contact between the ultrasonic transducer 2 and the shell 3 during the vibration process, and improve the structural safety of the ultrasonic instrument. The buffer pad 5 separates the ultrasonic transducer 2 and the shell 3, and the heat generated by the ultrasonic transducer 2 will not be directly transferred to the shell 3, reducing the situation of thermal damage caused by overheating of the shell 3, and improving the use effect and safety of the ultrasonic transducer 2.

[0114] It is understandable that the ultrasonic transducer 2 is not limited to being located on the buffer pad 5. Exemplarily, the ultrasonic transducer 2 is mounted on the housing 3.

[0115] In one embodiment, please refer to Figure 5 and Figure 6 A stage 31 is disposed on the shell 3 , and the stage 31 has a groove 311 that is recessed along the second direction toward a side away from the ultrasonic transducer 2 , and the buffer pad 5 is disposed in the groove 311 .

[0116] Exemplarily, the recessed depth of the recess 311 is 2 mm.

[0117] In the embodiment of the present application, the buffer pad 5 is arranged in the groove 311, and the buffer pad 5 is fixed by the groove wall 321 of the groove 311 to reduce the floating of the buffer pad 5 in the accommodating cavity 33. The buffer pad 5 is arranged on the stage 31, and the ultrasonic transducer 2 is placed on the buffer pad 5 to reduce the contact area between the ultrasonic transducer 2 and the shell 3, thereby reducing the influence of the shell 3 on ultrasonic propagation.

[0118] It is understandable that the housing 3 is not limited to being provided with the loading platform 31 . Exemplarily, the buffer pad 5 is mounted on the housing wall of the housing 3 .

[0119] In one embodiment, please refer to Figure 5 and Figure 6 The inner wall of the shell 3 has a glue storage groove 32 which is recessed along the first direction and the third direction toward the side away from the accommodating cavity 33. The cover plate 1 is covered on the groove wall 321 on the side of the glue storage groove 32 along the second direction. Sealant is provided on the side of the cover plate 1 away from the ultrasonic transducer 2. The groove wall 321 of the glue storage groove 32 can limit the sealant from entering the accommodating cavity 33.

[0120] Illustratively, the sealant is epoxy resin.

[0121] Exemplarily, the inner wall of the shell 3 has a glue storage groove 32 formed by being recessed by 1 mm along the first direction and the third direction toward the side away from the accommodating cavity 33 .

[0122] In the embodiment of the present application, the cover plate 1 is arranged on the groove wall 321 on one side of the glue storage groove 32 along the second direction, and the side of the cover plate 1 away from the ultrasonic transducer 2 is provided with sealant, and the sealant is located between the glue storage groove 32 and the cover plate 1. The groove wall 321 on one side of the glue storage groove 32 along the second direction can limit the sealant from entering the accommodating cavity 33, reduce the possibility of the sealant contacting the ultrasonic transducer 2, make the heat dissipation of the ultrasonic transducer 2 as little as possible without being affected by the sealant, and improve the heat dissipation efficiency of the ultrasonic transducer 2.

[0123] It is understandable that the inner wall of the housing 3 is not limited to being provided with the glue storage groove 32. Exemplarily, the cover plate 1 is provided on the end of the housing 3 in the second direction, and the sealant is provided between the cover plate 1 and the housing 3.

[0124] In one embodiment, the ultrasonic instrument is an ultrasonic beauty instrument.

[0125] In the embodiment of the present application, the ultrasonic beauty instrument uses ultrasonic energy to beautify the skin. The ultrasonic instrument can output sound wave focusing areas 6 and sound wave superposition areas 7 of different depths, which is suitable for the beauty needs of skin in different parts.

[0126] It is understandable that the ultrasonic instrument is not limited to being an ultrasonic beauty instrument. Exemplarily, the ultrasonic instrument is an ultrasonic diagnostic device or an ultrasonic therapeutic device.

[0127] In one embodiment, liquid quick-drying glue is provided between the ultrasonic transducer 2 and the buffer pad 5 .

[0128] In one embodiment, liquid glue is disposed between the buffer pad 5 and the groove wall 321 of the groove 311 , and the liquid glue becomes a flexible body after solidification.

[0129] In one embodiment, a transparent waterproof coating is provided on the focusing surface 211 of the ultrasonic transducer 2 .

[0130] Exemplarily, the waterproof coating is EVA (Ethylene Viny Acetate) glue.

[0131] In the description of the present application, the description with reference to the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and features of different embodiments or examples without contradiction.

[0132] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An ultrasonic transducer, characterized in that: The invention comprises at least two piezoelectric ceramic sheets, which are arranged in sequence along a first direction, and each of the piezoelectric ceramic sheets is formed with a concave focusing surface on one side along a second direction, and the second direction is arranged crosswise with the first direction, and each of the focusing surfaces is located on the same side of the piezoelectric ceramic sheets, and the focusing surface of each of the piezoelectric ceramic sheets is focused into an acoustic wave focusing area, and the acoustic wave focusing area of ​​each of the piezoelectric ceramic sheets is arranged linearly, and the extreme positions at both ends of the acoustic wave focusing areas arranged linearly are arranged along the first direction, and the acoustic wave focusing area is located between the extreme positions at the opposite ends of the corresponding piezoelectric ceramic sheets along a third direction, and a straight line perpendicular to the tangent plane of the focusing surface is a target straight line, and at least one target straight line of one of the at least two piezoelectric ceramic sheets intersects with at least one target straight line of another piezoelectric ceramic sheet to form an acoustic wave superposition area, and the acoustic wave superposition area is located on one side of the acoustic wave focusing area along the second direction.

2. The ultrasonic transducer according to claim 1, characterized in that: Each of the piezoelectric ceramic sheets is symmetrically arranged about a preset plane, and the preset plane is parallel to the first direction and the second direction respectively. The preset plane intersects with the focusing plane to form a preset intersection line, and the target straight line intersecting with the preset intersection line is a reference line. Among at least two of the piezoelectric ceramic sheets, the reference line of one of the piezoelectric ceramic sheets intersects with the reference line of the other piezoelectric ceramic sheet.

3. The ultrasonic transducer according to claim 2, characterized in that: In every two piezoelectric ceramic sheets, the reference line of one of the piezoelectric ceramic sheets intersects with the reference line of the other piezoelectric ceramic sheet.

4. The ultrasonic transducer according to claim 2, characterized in that: The preset intersection line is a straight line, and in at least two of the piezoelectric ceramic sheets, an angle between the preset intersection line of one of the piezoelectric ceramic sheets and the preset intersection line of the other piezoelectric ceramic sheet is greater than zero.

5. The ultrasonic transducer according to claim 2, characterized in that: The preset intersection line is a curve, and among at least two of the piezoelectric ceramic sheets, a curvature of the preset intersection line of one of the piezoelectric ceramic sheets is equal to or unequal to a curvature of the preset intersection line of the other piezoelectric ceramic sheet.

6. The ultrasonic transducer according to any one of claims 1 to 5, characterized in that: At least two of the piezoelectric ceramic sheets are connected in parallel, so that each of the piezoelectric ceramic sheets can be independently controlled to form the acoustic wave focusing area.

7. The ultrasonic transducer according to claim 6, characterized in that: The ultrasonic transducer comprises a separation layer located between adjacent piezoelectric ceramic sheets, the separation layer is respectively connected to the piezoelectric ceramic sheets on both sides, and the acoustic impedance of the separation layer is different from the acoustic impedance of the piezoelectric ceramic sheets.

8. The ultrasonic transducer according to claim 7, characterized in that: A ratio of the acoustic impedance value of the separation layer to the acoustic impedance value of the piezoelectric ceramic sheet is a target ratio, the target ratio is greater than or equal to 10, and the target ratio is less than or equal to 0.

1.

9. The ultrasonic transducer according to claim 7, characterized in that: Each of the piezoelectric ceramic sheets is provided with a corresponding cathode and anode, the anode of each of the piezoelectric ceramic sheets is separated by the separation layer, and the metal electrodes connect the cathodes corresponding to the piezoelectric ceramic sheets.

10. An ultrasonic instrument, characterized in that: include: The ultrasonic transducer according to any one of claims 1 to 8, wherein the number of the ultrasonic transducer is at least one; A housing is formed with a housing cavity, wherein the ultrasonic transducer is located in the housing cavity; A cover plate, covering the accommodating cavity; A sound-transmitting window is arranged on a shell wall of the shell body on one side along the second direction, and the cover plate is arranged opposite to the sound-transmitting window along the second direction.

11. The ultrasonic instrument according to claim 10, characterized in that: The ultrasonic instrument comprises at least two ultrasonic transducers, all of which are arranged in sequence along the third direction, and the corresponding piezoelectric ceramic sheets in at least two of the ultrasonic transducers are connected in series.

12. The ultrasonic instrument according to claim 11, characterized in that: The ultrasonic transducers located at both ends of the third direction, one of which is a first transducer, and a metal electrode connects the cathodes of the piezoelectric ceramic sheets of the first transducer, and the other ultrasonic transducer is a second transducer, and the anodes of the piezoelectric ceramic sheets of the second transducer are isolated from each other, and the piezoelectric ceramic sheets corresponding to every two adjacent ultrasonic transducers are connected in series.

13. The ultrasonic instrument according to claim 10, characterized in that: The ultrasonic instrument comprises an imaging probe, at least one of the ultrasonic transducers is provided with an opening, the opening is used for installing the imaging probe, and the sound-transmitting window is transparent.

14. The ultrasonic instrument according to claim 10, characterized in that: The ultrasonic instrument comprises a buffer pad located in the accommodating cavity, and the ultrasonic transducer is located on the buffer pad.

15. The ultrasonic instrument according to claim 14, characterized in that: The shell is provided with a stage, the stage has a groove which is sunken along the second direction toward a side away from the ultrasonic transducer, and the buffer pad is arranged in the groove.

16. The ultrasonic instrument according to claim 10, characterized in that: The inner wall of the shell has a glue storage groove which is recessed along the first direction and the third direction toward the side away from the accommodating cavity. The cover plate is arranged on the groove wall of the glue storage groove along the second direction. Sealant is arranged on the side of the cover plate away from the ultrasonic transducer. The groove wall of the glue storage groove can limit the sealant from entering the accommodating cavity.

17. The ultrasonic instrument according to claim 10, characterized in that: The ultrasonic instrument is an ultrasonic beauty instrument.

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