A multi-point focusing ultrasonic transducer

Abstract

This utility model relates to a multi-point focusing ultrasound transducer, including a housing. The inner cavity of the housing is divided into at least two chambers. A piezoelectric ceramic plate is installed on the port of each chamber of the housing. Each piezoelectric ceramic plate is spherical and arc-shaped. The focal point of each piezoelectric ceramic plate falls outside the port of the housing. The focal points of all piezoelectric ceramic plates do not coincide. One edge of the circular outline of each piezoelectric ceramic plate is cut off at the abutment of the partition, so that the cut edge of each piezoelectric ceramic plate is flush with the corresponding side of the partition. In order to adapt to the small internal space of the beauty device, the edges of adjacent piezoelectric ceramic plates are cut off and aligned on both sides of the partition, making the structure compact and reducing the space occupied. At the same time, it can achieve simultaneous application of multiple focal points, improving work efficiency, reducing working time, reducing the driving frequency of the motor in the beauty device, reducing motor wear, and increasing the service life of the beauty device.

Description

Technical Field

[0001] This utility model relates to the field of piezoelectric ceramic transducer technology, specifically to a multi-point focusing ultrasonic transducer. Background Technology

[0002] Focused ultrasound transducers are widely used in the medical aesthetics industry for skin rejuvenation. Utilizing the strong penetrability, good directionality, and concentrated energy of ultrasound waves, these characteristics allow ultrasound to penetrate deep into the skin without damaging the skin surface, accurately reaching the desired area and precisely focusing ultrasound energy within the target tissue to alter its structure. For beauty devices using focused ultrasound transducers in the medical aesthetics industry, to adapt to different parts of the body and ensure flexibility of use, they must be compact and easy to hold, accommodating the varied contours of the face. Due to the limited internal space of the device, most beauty devices use single-point focused ultrasound transducers composed of a single focused piezoelectric ceramic plate. Under the action of the ultrasound drive circuit within the device, single-point focusing is achieved. When applied to the skin, each treatment can only proceed along a single line trajectory. The motor needs to be driven for each treatment trajectory direction. This single-line treatment method is inefficient, not only resulting in excessively long treatment times and operator fatigue, but also increasing the risk of motor damage from prolonged operation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a multi-point focusing ultrasonic transducer to solve the problem that the single-point focusing of the transducer inside the beauty instrument results in excessively long treatment time and the motor is prone to damage due to long-term driving and position movement.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A multi-point focusing ultrasonic transducer includes a housing. At least one partition is provided in the inner cavity of the housing, dividing the inner cavity of the housing into at least two chambers. The two side walls of the partition extend to the two opposite inner side walls of the housing and are fixed to each other. A piezoelectric ceramic plate is installed in the port of each chamber in the housing. Each piezoelectric ceramic plate is spherical and arc-shaped. The concave surfaces of multiple piezoelectric ceramic plates arranged side by side face the outside of the port of the housing, so that the focal point of any piezoelectric ceramic plate falls outside the port of the housing. The focal points of all piezoelectric ceramic plates do not coincide. One edge of the circular outline of any piezoelectric ceramic plate is cut off at the abutment of the partition, so that the cut edge of any piezoelectric ceramic plate is flush with the corresponding side of the partition.

[0006] In a preferred embodiment, the inner cavity of the housing has a vibration chamber on the convex side of the piezoelectric ceramic sheet. A PCB board is provided on the side of the vibration chamber away from the piezoelectric ceramic sheet. The electrode leads of each piezoelectric ceramic sheet are respectively connected to the PCB board. The lead wires of the PCB board extend from the side of the housing opposite to the port. The side of the housing opposite to the port is sealed with a potting sealant layer. Flange edges extend inward around the port of the housing to act as a barrier. The flange edges are used to support the piezoelectric ceramic sheets. The edges of the concave side of each piezoelectric ceramic sheet are sealed with a sealant layer at the contact points with the housing and the partition.

[0007] As a preferred embodiment, a partition is provided in the middle of the shell, and two first piezoelectric ceramic sheets are symmetrically arranged on both sides of the partition. The two first piezoelectric ceramic sheets with circular outlines have one edge cut off at the abutment of the partition along a direction parallel to the side of the partition.

[0008] In a preferred embodiment, the width of the cut-off portion of the first piezoelectric ceramic sheet with a circular profile is between one-quarter and one-half the diameter of the circular profile.

[0009] In a preferred embodiment, the outer shell has two parallel and separate partitions that divide it into three chambers. A first piezoelectric ceramic sheet is disposed in each of the two chambers on opposite sides of the partitions. One edge of each of the two first piezoelectric ceramic sheets is cut off near the corresponding partition at the point where their circular outlines face each other. A second piezoelectric ceramic sheet is disposed in the chamber between the two partitions. Both edges of the circular outline of the second piezoelectric ceramic sheet are cut off near the two partitions. The cut edges of the two first and second piezoelectric ceramic sheets are flush with the sides of the corresponding partitions.

[0010] In a preferred embodiment, the width of the portion of the first piezoelectric ceramic sheet with a circular outline that is cut off is between one-quarter and two-thirds of the diameter of the circular outline, and the two sides of the second piezoelectric ceramic sheet with a circular outline are symmetrically cut off, and the remaining width of the second piezoelectric ceramic sheet after cutting off is between one-quarter and two-thirds of the diameter of the circular outline.

[0011] In a preferred embodiment, the outer shell is provided with two separate and parallel partitions in the middle, dividing the outer shell into three equal chambers. Each of the three chambers is provided with a second piezoelectric ceramic sheet. The two sides of the circular outline of each second piezoelectric ceramic sheet are cut off along the direction parallel to the partition. The edge of each second piezoelectric ceramic sheet that is connected to the outer shell rests on the flange edge of the outer shell. The edge of each second piezoelectric ceramic sheet that is connected to the partition abuts against the side wall of the corresponding partition.

[0012] As a preferred embodiment, the two sides of the circular outline of the second piezoelectric ceramic sheet are symmetrically cut off, and the remaining width of the second piezoelectric ceramic sheet after cutting off is between one-quarter and two-thirds of the diameter of the circular outline.

[0013] The beneficial effects of this utility model are as follows: By arranging multiple piezoelectric ceramic plates side by side inside the transducer, multiple focal points can be achieved. In order to adapt to the small internal space of the beauty device, the edges of adjacent piezoelectric ceramic plates are cut off and aligned on both sides of the partition, making the structure compact and reducing the space occupied. This allows for simultaneous treatment of multiple focal points, improving work efficiency, reducing working time, reducing the frequency of motor drive in the beauty device, reducing motor wear, and increasing the service life of the beauty device. In actual manufacturing, two, three, or more focal points can be arranged according to the situation to achieve simultaneous multi-point and multi-line trajectory treatment, which is flexible, versatile, and highly practical. Attached Figure Description

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0015] Figure 1 This is an overall schematic diagram of Embodiment 1 of the present utility model;

[0016] Figure 2 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0017] Figure 3 This is a top view of Embodiment 1 of the present utility model;

[0018] Figure 4 This is a schematic diagram of the first piezoelectric ceramic sheet of this utility model;

[0019] Figure 5 This is a top view of Embodiment 2 of the present invention;

[0020] Figure 6 This is a top view of Embodiment 3 of the present invention;

[0021] Figures 1-6 Explanation of reference numerals in the attached diagram: 1. Outer shell; 2. First piezoelectric ceramic sheet; 3. Partition plate; 4. Wire; 5. PCB board; 6. Second piezoelectric ceramic sheet; 7. Vibration chamber; 8. Potting and sealing layer; 9. Sealing layer. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] Example 1, as Figures 1-4The diagram shows a first embodiment of a multi-point focusing ultrasonic transducer according to the present invention. It includes a housing 1, with a partition 3 in the middle. The two side walls of the partition 3 extend to and are fixed to the two opposite inner side walls of the housing 1, dividing the inner cavity of the housing 1 into two symmetrical chambers. Two first piezoelectric ceramic plates 2 are symmetrically arranged in the two side chambers of the partition 3. A vibration chamber 7 is provided on the convex side of the first piezoelectric ceramic plate 2 in the inner cavity of the housing 1. A PCB board 5 is provided on the side of the vibration chamber 7 away from the first piezoelectric ceramic plate 2. The electrode leads of the two first piezoelectric ceramic plates 2 are respectively connected to the PCB board 5. Lead wires 4 of the PCB board 5 extend from the side of the housing 1 opposite to the port. The side of the housing 1 opposite to the port is sealed with a potting sealant layer 8. Flange edges extend inward from the periphery of the port of the housing 1, serving as a blocking element. The flange edges are used to support the first piezoelectric ceramic plates 2. The edges of the concave side of the two first piezoelectric ceramic plates 2 are sealed with a sealant layer 9 at their contact points with the housing 1 and the partition 3. In order to ensure the energizing effect of the two first piezoelectric ceramic sheets 2, the concave side of the two first piezoelectric ceramic sheets 2 must be sealed inside the vibration chamber 7.

[0024] In this embodiment, both first piezoelectric ceramic sheets 2 are spherical arc-shaped. The concave surfaces of the two side-by-side first piezoelectric ceramic sheets 2 face the outside of the port of the outer shell 1, so that the focal points R1 and R2 of the two first piezoelectric ceramic sheets 2 both fall outside the port of the outer shell 1. The focal points R1 and R2 of the two first piezoelectric ceramic sheets 2 do not coincide. One edge of the circular outline of the two first piezoelectric ceramic sheets 2 is cut off at the abutment of the partition 3, so that the cut edges of the two first piezoelectric ceramic sheets 2 are flush with the corresponding side of the partition 3. By placing the two circular first piezoelectric ceramic sheets 2 side by side, there are two focal points R1 and R2. Part of the adjacent sides of the two first piezoelectric ceramic sheets 2 are cut off to reduce the overall space occupied. The flat edges of the two first piezoelectric ceramic sheets 2 after cutting off are close to each other. The two first piezoelectric ceramic sheets 2 are symmetrically placed side by side on the port of the outer shell 1 to ensure the consistency of the two focal points. The distance between the focal point of the spherical first piezoelectric ceramic sheet 2 and the end face of the outer shell 1 is fixed, which can realize the simultaneous marking of two routes and improve the working efficiency.

[0025] In this embodiment, the width of the portion of the first piezoelectric ceramic sheet 2 with a circular outline that is cut off is between one-quarter and one-half of the diameter of the circular outline. The size of the adjacent side edges to be cut off from the two first piezoelectric ceramic sheets 2 depends on the distance between the two focal points R1 and R2, and the size of the space occupied.

[0026] Example 2, as Figure 5This is a second embodiment of the multi-point focusing ultrasonic transducer described in this utility model. The main differences between this embodiment and the first embodiment are as follows; the remaining structural parts that are the same will not be described again in this embodiment. Two parallel and separate partitions 3 are provided in the cavity of the outer shell 1, dividing the outer shell 1 into three chambers. First piezoelectric ceramic sheets 2 are respectively arranged in the chambers on the two sides of the two partitions 3 that are far apart. One edge of each of the circular outlines of the two first piezoelectric ceramic sheets 2 is cut off near the corresponding partition 3. A second piezoelectric ceramic sheet 6 is arranged in the chamber between the two partitions 3. Both edges of the circular outline of the second piezoelectric ceramic sheet 6 are cut off near the two partitions 3. The cut edges of the two first piezoelectric ceramic sheets 2 and the second piezoelectric ceramic sheet 6 are flush with the sides of the corresponding partitions 3. This allows for simultaneous emission of three focal points. The cutting size of the two first piezoelectric ceramic sheets 2 and the second piezoelectric ceramic sheet 6 can be adjusted to suit the available space, and the distance between the three focal points can also be adjusted.

[0027] In this embodiment, the width of the portion of the first piezoelectric ceramic sheet 2 with a circular outline that is removed is between one-quarter and two-thirds of the diameter of the circular outline. The two edges of the second piezoelectric ceramic sheet 6 with a circular outline are symmetrically removed, and the remaining width of the second piezoelectric ceramic sheet 6 after removal is between one-quarter and two-thirds of the diameter of the circular outline. When cutting the first piezoelectric ceramic sheets 2 on both sides and the second piezoelectric ceramic sheet 6 in the middle, the remaining size after cutting should not be too small, otherwise the focused energy will be too weak, resulting in poor treatment effect.

[0028] Example 3, as Figure 6 This is the third embodiment of a multi-point focusing ultrasonic transducer according to this utility model. The main differences between this embodiment and the first embodiment are as follows; the other structural parts that are the same will not be described again in this embodiment. Two separate and parallel partitions 3 are arranged in the middle of the outer shell 1, dividing the outer shell 1 into three equal chambers. A second piezoelectric ceramic sheet 6 is arranged in each of the three chambers. The two sides of the circular outline of each second piezoelectric ceramic sheet 6 are cut off along a direction parallel to the partition 3. The arrangement of the second piezoelectric ceramic sheets 6 with cut-off sides results in a more compact structure and better consistency of the focal point. This arrangement can also be extended to multiple focal point arrangements.

[0029] In this embodiment, the two sides of the circular outline of the second piezoelectric ceramic sheet 6 are symmetrically cut off, and the remaining width of the second piezoelectric ceramic sheet 6 after cutting off is between one-quarter and two-thirds of the diameter of the circular outline. Based on the space occupied, the width of the three second piezoelectric ceramic sheets 6 is equally divided.

[0030] In this invention, two or more piezoelectric ceramic sheets are placed side by side, resulting in two or more focal points. The focal point position of any spherical piezoelectric ceramic sheet is fixed, but the focal distance between multiple circular piezoelectric ceramic sheets is still relatively far, and the overall space occupied is also relatively large due to installation space limitations. By cutting off a portion of the adjacent edges of the piezoelectric ceramic sheets, the focal point positions are ensured to not overlap, making the structure more compact. The cutting method is to cut along the overlapping cleavage line between adjacent piezoelectric ceramic sheets. Adjacent piezoelectric ceramic sheets are separated by a partition 3. After cutting, the overall area is reduced, and the focal point energy can be replenished by changing the amount of electrical energy. This not only enables multiple focal points to be emitted simultaneously, but also makes the overall structure compact and occupies less space.

[0031] The actual operation process of this utility model is as follows:

[0032] by Figures 1-4 Referring to Embodiment 1, one side of each of the two circular, spherical, arc-shaped first piezoelectric ceramic sheets 2 is cut off. The cut edges of the first piezoelectric ceramic sheets 2 are then aligned and placed into the port of the outer shell 1. The transducer with the two first piezoelectric ceramic sheets 2 is installed inside the beauty device. During use, the focus R1 and focus R2 simultaneously hit the skin, achieving simultaneous spot treatment in two directions, which improves treatment efficiency and reduces treatment time.

[0033] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A multi-focal ultrasound transducer, characterized by, The shell (1) includes an outer shell (1). At least one partition (3) is provided in the inner cavity of the outer shell (1) to divide the inner cavity of the outer shell (1) into at least two chambers. The two side walls of the partition (3) extend to the two opposite inner side walls of the outer shell (1) and are fixed to each other. A piezoelectric ceramic sheet is installed in the port of any chamber in the outer shell (1). Each piezoelectric ceramic sheet is spherical and arc-shaped. The concave surface of multiple piezoelectric ceramic sheets arranged side by side faces the outside of the port of the outer shell (1), so that the focal point of any piezoelectric ceramic sheet falls outside the port of the outer shell (1). The focal points of all piezoelectric ceramic sheets (2) do not coincide. The circular outline of any piezoelectric ceramic sheet has one edge cut off at the abutment of the partition (3), so that the cut edge of any piezoelectric ceramic sheet is flush with the corresponding side of the partition (3).

2. The multi-focal ultrasound transducer of claim 1, wherein, The inner cavity of the outer shell (1) is provided with a vibration chamber (7) on the convex side of the piezoelectric ceramic sheet. The vibration chamber (7) is provided with a PCB board (5) on the side away from the piezoelectric ceramic sheet. The electrode leads of each piezoelectric ceramic sheet are respectively connected to the PCB board (5). The lead wires (4) of the PCB board (5) extend from the side of the outer shell (1) away from the port. The side of the outer shell (1) away from the port is sealed with a potting sealant layer (8). The port of the outer shell (1) has flange edges extending inward to block the flange edges, which are used to support the piezoelectric ceramic sheet. The edges of the concave side of each piezoelectric ceramic sheet are sealed with a sealant layer (9) at the contact points with the outer shell (1) and the partition (3).

3. The multi-focal ultrasound transducer of claim 2, wherein, The outer shell (1) has a partition (3) in the middle, and two first piezoelectric ceramic sheets (2) are symmetrically arranged on both sides of the partition (3). The two first piezoelectric ceramic sheets (2) with circular outlines have one edge cut off at the contact point of the partition (3) along the side direction parallel to the partition (3).

4. The multi-focal ultrasound transducer of claim 3, wherein, The width of the cut portion of the first piezoelectric ceramic sheet (2) with a circular outline is between one-quarter and one-half of the diameter of the circular outline.

5. The multi-focal ultrasound transducer of claim 2, wherein, The outer shell (1) is provided with two separate and parallel partitions (3) in the cavity, which divide the outer shell (1) into three cavities. The two cavities on opposite sides of the two partitions (3) are respectively provided with first piezoelectric ceramic sheets (2). The circular outlines of the two first piezoelectric ceramic sheets (2) are cut off on one side near the corresponding partition (3). The cavity between the two partitions (3) is provided with second piezoelectric ceramic sheets (6). The circular outlines of the second piezoelectric ceramic sheets (6) are cut off on both sides near the two partitions (3). The cut edges of the two first piezoelectric ceramic sheets (2) and the second piezoelectric ceramic sheets (6) are flush with the side of the corresponding partition (3).

6. The multi-point focusing ultrasonic transducer according to claim 5, characterized in that, The width of the portion of the first piezoelectric ceramic sheet (2) with a circular outline that is cut off is between one-quarter and two-thirds of the diameter of the circular outline. The two sides of the second piezoelectric ceramic sheet (6) with a circular outline are symmetrically cut off. The remaining width of the second piezoelectric ceramic sheet (6) after cutting off is between one-quarter and two-thirds of the diameter of the circular outline.

7. The multi-point focusing ultrasonic transducer according to claim 2, characterized in that, The outer shell (1) has two separate and parallel partitions (3) in the middle, which divide the outer shell (1) into three equal chambers. Each of the three chambers is provided with a second piezoelectric ceramic sheet (6). The two sides of the circular outline of each second piezoelectric ceramic sheet (6) are cut off along the direction parallel to the partition (3). The edges of each second piezoelectric ceramic sheet (6) connected to the outer shell (1) are respectively placed on the flange edge of the outer shell (1). The edges of each second piezoelectric ceramic sheet (6) connected to the partition (3) abut against the side wall of the corresponding partition (3).

8. The multi-point focusing ultrasonic transducer according to claim 7, characterized in that, The two sides of the circular outline of the second piezoelectric ceramic sheet (6) are symmetrically cut off, and the remaining width of the second piezoelectric ceramic sheet (6) after the cut-off is between one-quarter and two-thirds of the diameter of the circular outline.

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