Multi-focus ultrasonic transducer

Abstract

The multi-focus ultrasonic transducer comprises a shell, a first ceramic chip and a second ceramic chip, a first limiting space and a second limiting space are arranged in the shell; the first ceramic chip is arranged on the first limiting space and is positioned on the surface of the first spherical space; the second ceramic plate is arranged on the second limiting space and is positioned on the surface of the second spherical space; the radius of the first spherical space is smaller than or larger than that of the second spherical space; in the ultrasonic focusing direction, ultrasonic waves generated by the first ceramic wafer pass through the first sphere center of the first spherical space, and ultrasonic waves generated by the second ceramic wafer pass through the second sphere center of the second spherical space. The first ceramic chip and the second ceramic chip generate first ultrasonic waves and second ultrasonic waves respectively, the first ultrasonic waves are focused at the first sphere center to form a first focus, the second ultrasonic waves are focused at the second sphere center to form a second focus, and the focal lengths of the first focus and the second focus are different, so that the effects of multiple focuses and variable focus distance are achieved.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic transducer technology, specifically to a multifocal ultrasonic transducer. Background Technology

[0002] An ultrasonic transducer is a device that converts electrical energy into ultrasonic energy. Ultrasonic transducers are usually made of piezoelectric materials.

[0003] The patent document with application publication number CN101766870A discloses an ultrasonic transducer, which specifically discloses: including two or more fan-shaped spherical ceramic sheets and a hub-type frame that cooperates with the fan-shaped spherical ceramic sheets, wherein the fan-shaped spherical ceramic sheets are fixed on the hub-type frame to form a large-diameter self-focusing ultrasonic transducer.

[0004] The aforementioned patent has better focusing efficiency and lower path energy loss, but it still has the following problems: it can only achieve single-point focusing and the focal length is not adjustable. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a multi-focus ultrasonic transducer that can achieve multi-focus focusing, and the focal length of each focus is different.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A multi-focus ultrasonic transducer includes a housing, a first ceramic plate, and a second ceramic plate. A first limiting space and a second limiting space are provided inside the housing. The first ceramic plate is disposed on the first limiting space and located on the surface of a first spherical space. The second ceramic plate is disposed on the second limiting space and located on the surface of a second spherical space. The radius of the first spherical space is smaller than or larger than the radius of the second spherical space. In the direction of ultrasonic wave focusing, the ultrasonic wave generated by the first ceramic plate passes through the first center of the first spherical space, and the ultrasonic wave generated by the second ceramic plate passes through the second center of the second spherical space.

[0008] Furthermore, when viewed from above, the first limiting space and the second limiting space are arranged adjacent to each other.

[0009] Furthermore, the first limiting space is disposed inside the second limiting space, or the second limiting space is disposed inside the first limiting space.

[0010] Furthermore, the first limiting space is located in one side of the interior space of the housing, and the second limiting space is located in the other side of the interior space of the housing.

[0011] Furthermore, when viewed from above, the projected area of ​​the first limiting space on the horizontal plane is greater than, equal to, or less than the projected area of ​​the second limiting space on the horizontal plane.

[0012] Furthermore, a first fixing structure and a second fixing structure are provided inside the shell. The second fixing structure is connected to the outer wall of the first fixing structure and the inner wall of the shell, respectively. The space inside the first fixing structure is defined as the first limiting space, and the space between the first fixing structure and the inner wall of the shell is defined as the second limiting space. The first ceramic sheet is disposed on the first fixing structure, and the second ceramic sheet is disposed on the second fixing structure.

[0013] Furthermore, when viewed from above, the first limiting space and the second limiting space are set at a predetermined distance apart.

[0014] Furthermore, the first center of the sphere and the second center of the sphere are located on the same vertical line.

[0015] Furthermore, the first center of the sphere and the second center of the sphere are located on different vertical lines.

[0016] Furthermore, it also includes a third limiting space, which is disposed inside the housing, and a third ceramic is disposed on the third limiting space and located on the surface of the third spherical space; in the direction of ultrasonic wave focusing, the ultrasonic wave generated by the third ceramic sheet passes through the third center of the third spherical space.

[0017] Furthermore, when viewed from above, the first limiting space, the second limiting space, and the third limiting space are arranged adjacent to each other; or the first limiting space, the second limiting space, and the third limiting space are arranged adjacent to each other.

[0018] Further, the second limiting space is disposed inside the third limiting space, and the first limiting space is disposed inside the second limiting space; or the first limiting space is disposed inside the third limiting space, and the second limiting space is disposed inside the first limiting space; or the first limiting space is disposed inside the second limiting space, and the third limiting space is disposed inside the first limiting space; or the second limiting space is disposed inside the first limiting space, and the third limiting space is disposed inside the second limiting space; or the third limiting space is disposed inside the second limiting space, and the first limiting space is disposed inside the third limiting space; or the third limiting space is disposed inside the third limiting space. The second limiting space is located inside the first limiting space; or the second limiting space and the third limiting space are adjacent and located inside the first limiting space; or the first limiting space and the third limiting space are adjacent and located inside the second limiting space; or the first limiting space and the second limiting space are adjacent and located inside the third limiting space; or the first limiting space and the second limiting space are spaced apart and located inside the third limiting space; or the first limiting space and the third limiting space are spaced apart and located inside the second limiting space; or the second limiting space and the third limiting space are spaced apart and located inside the first limiting space.

[0019] Further, the first limiting space is located in one side of the interior space of the housing, the second limiting space is located in the other side of the interior space of the housing, and the third limiting space is disposed inside the first limiting space; or the first limiting space is located in one side of the interior space of the housing, the second limiting space is located in the other side of the interior space of the housing, and the third limiting space is disposed inside the second limiting space; or the third limiting space is located in one side of the interior space of the housing, the first limiting space is located in the other side of the interior space of the housing, and the second limiting space is disposed inside the first limiting space; or the third limiting space is located in one side of the interior space of the housing, the second limiting space is located in the other side of the interior space of the housing, and the first limiting space is disposed inside the second limiting space; or the first limiting space is located in the other side of the interior space of the housing, the second limiting space is located in the other side of the interior space of the housing, and the first limiting space is disposed inside the second limiting space; or the first limiting space is located in the other side of the interior space of the housing, the second limiting space is located in the other side of the interior space of the housing, and the third ... The first limiting space is located in one side of the interior space of the housing, the second limiting space is located in the other side of the interior space of the housing, and the first limiting space and the second limiting space are arranged in conjunction with each other around the third limiting space; or the first limiting space is located in one side of the interior space of the housing, the third limiting space is located in the other side of the interior space of the housing, and the second limiting space is located inside the third limiting space; or the second limiting space is located in one side of the interior space of the housing, the third limiting space is located in the other side of the interior space of the housing, and the first limiting space is located inside the third limiting space; or the first limiting space is located in a first part of the interior space of the housing, the second limiting space is located in a second part of the interior space of the housing, and the third limiting space is located in the remaining part of the interior space of the housing.

[0020] Further, the first limiting space and the second limiting space are disposed alternately inside the housing, and the third limiting space is disposed inside the first limiting space; or the first limiting space and the second limiting space are disposed alternately inside the housing, and the third limiting space is disposed inside the second limiting space; or the first limiting space and the third limiting space are disposed alternately inside the housing, and the second limiting space is disposed inside the third limiting space; or the first limiting space and the third limiting space are disposed alternately inside the housing, and the second limiting space is disposed inside the first limiting space; or the second limiting space and the third limiting space are disposed alternately inside the housing, and the first limiting space is disposed inside the second limiting space; or the second limiting space and the third limiting space are disposed alternately inside the housing, and the first limiting space is disposed inside the third limiting space.

[0021] Furthermore, the first limiting space, the second limiting space, and the third limiting space are arranged at intervals.

[0022] Furthermore, the first center of the sphere, the second center of the sphere, and the third center of the sphere are located on the same vertical line; or, the first center of the sphere, the second center of the sphere, and the third center of the sphere are located on different vertical lines; or, among the three centers of the sphere, two are located on the same vertical line, and the remaining one is located on another vertical line.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention achieves a multi-focal effect with variable focal distance by placing a first ceramic plate and a second ceramic plate on the surface of spherical spaces with different radii. The first ceramic plate and the second ceramic plate respectively generate a first ultrasonic wave and a second ultrasonic wave. The first ultrasonic wave is focused at the center of the first sphere to form a first focal point, and the second ultrasonic wave is focused at the center of the second sphere to form a second focal point. The focal lengths of the first focal point and the second focal point are different. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A cross-sectional view;

[0027] Figure 3 yes Figure 1 A top view of the middle shell, the first ceramic plate, and the second ceramic plate;

[0028] Figure 4 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the second embodiment of this utility model;

[0029] Figure 5 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the third embodiment of this utility model;

[0030] Figure 6 This is a cross-sectional schematic diagram of the fourth embodiment of the present invention;

[0031] Figure 7 This is a cross-sectional schematic diagram of the fifth embodiment of the present invention;

[0032] Figure 8 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the fifth embodiment of this utility model;

[0033] Figure 9This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the sixth embodiment of this utility model;

[0034] Figure 10 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the seventh embodiment of this utility model;

[0035] Figure 11 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the eighth embodiment of this utility model;

[0036] Figure 12 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the ninth embodiment of this utility model;

[0037] Figure 13 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the tenth embodiment of this utility model;

[0038] Figure 14 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the eleventh embodiment of this utility model;

[0039] Figure 15 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the twelfth embodiment of this utility model;

[0040] Figure 16 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the thirteenth embodiment of this utility model;

[0041] Figure 17 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the fourteenth embodiment of this utility model;

[0042] Figure 18 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the fifteenth embodiment of this utility model;

[0043] Figure 19 This is a top view of the shell, the first ceramic sheet, and the second ceramic sheet in the sixteenth embodiment of this utility model;

[0044] Figure 20 This is a cross-sectional schematic diagram of the seventeenth embodiment of the present utility model;

[0045] Figure 21 This is a cross-sectional schematic diagram of the eighteenth embodiment of the present invention.

[0046] Figure Labels

[0047] 100. Multifocal ultrasonic transducer; 1. Housing; 11. First limiting space; 12. Second limiting space; 13. First spherical space; 131. First sphere center; 132. First focal point; 14. Second spherical space; 141. Second sphere center; 142. Second focal point; 15. First fixing structure; 16. Second fixing structure; 17. Third limiting space; 18. Third spherical space; 181. Third sphere center; 182. Third focal point;

[0048] 2. First ceramic sheet; 3. Second ceramic sheet; 4. Electrode wire; 5. Third ceramic sheet. Detailed Implementation

[0049] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top surface", "bottom surface", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] The utility model will be further described below with reference to the accompanying drawings and specific embodiments. The following description is merely exemplary and does not limit the scope of protection of the utility model.

[0053] Please refer to Figures 1-3A multifocal ultrasonic transducer 100 comprises a housing 1, a first ceramic plate 2, and a second ceramic plate 3. A first limiting space 11 and a second limiting space 12 are provided inside the housing 1. The first ceramic plate 2 is disposed on the first limiting space 11 and located on the surface of a first spherical space 13; the second ceramic plate 3 is disposed on the second limiting space 12 and located on the surface of a second spherical space 14. The radius of the first spherical space 13 is smaller than or larger than the radius of the second spherical space 14. In a preferred embodiment, the radius of the first spherical space 13 is smaller than the radius of the second spherical space 14. In the direction of ultrasonic wave focusing, the ultrasonic wave generated by the first ceramic plate 2 passes through the first center 131 of the first spherical space 13, and the ultrasonic wave generated by the second ceramic plate 3 passes through the second center 141 of the second spherical space 14.

[0054] By applying voltages to the first ceramic plate 2 and the second ceramic plate 3 respectively to induce the inverse piezoelectric effect, electrical signals are converted into ultrasonic signals. The ultrasonic signals from the first ceramic plate 2 are emitted towards the first sphere center 131, forming a first focal point 132 (for better representation, the position of the first focal point 132 is set on the first sphere center 131). The ultrasonic signals from the second ceramic plate 3 are emitted towards the second sphere center 141, forming a second focal point 142 (for better representation, the position of the second focal point 142 is set on the second sphere center 141).

[0055] It should be noted that in this utility model, "top view" refers to the observation of the multifocal ultrasonic transducer 100 from a top view perspective when only the housing 1, the first ceramic plate 2, and the second ceramic plate 3 are present.

[0056] In this embodiment, when viewed from above, the first limiting space 11 and the second limiting space 12 are arranged adjacent to each other. Specifically, as a preferred embodiment, please refer to... Figure 3 The first limiting space 11 is located inside the second limiting space 12.

[0057] Of course, the second limiting space 12 can also be set inside the first limiting space 11 (since it is only in...). Figure 3 Based on this, simple position changes are made to the first limiting space 11 and the second limiting space 12 (therefore no diagram is drawn), which are determined by the actual working conditions and are not limited here.

[0058] Specifically, a first fixing structure 15 and a second fixing structure 16 are provided inside the shell 1. The second fixing structure 16 is connected to the outer wall of the first fixing structure 15 and the inner wall of the shell 1, respectively. In this embodiment, the first fixing structure 15 is a hollow cylindrical structure, but it can also be a hollow annular structure (circular ring, square ring, etc.). The internal space of the first fixing structure 15 is connected to the internal space of the shell 1. The internal space of the first fixing structure 15 is defined as a first limiting space 11, and the space between the first fixing structure 15 and the inner wall of the shell 1 is defined as a second limiting space 12. A first ceramic sheet 2 is disposed inside the first fixing structure 15, and a second ceramic sheet 3 is disposed on the second fixing structure 16.

[0059] In this embodiment, viewed from the vertical cross-section of the housing 1, the projections of the first ceramic sheet 2 and the second ceramic sheet 3 are both curved surfaces, and the curvatures of the first ceramic sheet 2 and the second ceramic sheet 3 are substantially the same. Of course, the curvatures of the first ceramic sheet 2 and the second ceramic sheet 3 may also be different, which is not limited here.

[0060] In this embodiment, a vertical line (not shown in the figure) passes through the first ceramic sheet 2, and the first sphere center 131 and the second sphere center 141 are respectively located on this vertical line. Please refer to [the relevant documentation] for details. Figure 2 A horizontal plane a is parallel to the shell 1, and the projection of the first sphere center 131 on the horizontal plane a and the projection of the second sphere center 141 on the horizontal plane a are located at the same position.

[0061] The working principle of this utility model is described below to facilitate a better understanding of it:

[0062] This invention applies voltage to a first ceramic sheet 2 and a second ceramic sheet 3 using two electrode wires 4, causing them to undergo an inverse piezoelectric effect. This means the first and second ceramic sheets 2 and 3 deform. The first ceramic sheet 2 converts the electrical signal into a first ultrasonic wave and emits it along the direction of the first sphere center 131, focusing it at the first sphere center 131 to form a first focal point 132. The second ceramic sheet 3 also converts the electrical signal into an ultrasonic wave and emits it along the direction of the second sphere center 141, focusing it at the second sphere center 141 to form a second focal point 142. Simultaneously, because the positions of the first and second sphere centers 131 and 141 are different, the positions of the first focal point 132 and the second focal point 142 are also different. This achieves a multi-focal effect with variable focal distances.

[0063] Please refer to Figure 4 , Figure 4 This is a top view schematic diagram of the second embodiment of the present invention. The difference between the second embodiment and the first embodiment lies in the change of the positions of the first limiting space 11 and the second limiting space 12, specifically:

[0064] In this embodiment, the first limiting space 11 is located in one side of the interior space of the housing 1, and the second limiting space 12 is located in the other side of the interior space of the housing 1. Specifically, the horizontal plane a is parallel to the housing 1. When viewed from above, the projected area of ​​the first limiting space 11 on the horizontal plane a is equal to the projected area of ​​the second limiting space 12 on the horizontal plane a (i.e., as shown in the figure). Figure 4 (As shown). Of course, the projected area of ​​the first limiting space 11 on the horizontal plane a can be greater than the projected area of ​​the second limiting space 12 on the horizontal plane a, or the projected area of ​​the first limiting space 11 on the horizontal plane a can be smaller than the projected area of ​​the second limiting space 12 on the horizontal plane a. The projected areas of the first limiting space 11 and the second limiting space 12 are selected according to the actual working conditions, and are not limited here.

[0065] Other technical features and effects are consistent with the first embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 The explanation content.

[0066] Please refer to Figure 5 , Figure 5 This is a top view schematic diagram of the third embodiment of the present invention. The difference between the third embodiment and the first embodiment lies in the change of the positions of the first limiting space 11 and the second limiting space 12, specifically:

[0067] In this embodiment, when viewed from above, the first limiting space 11 and the second limiting space 12 are set at a predetermined distance apart. The specific distance between them is determined by the actual working conditions and is not limited here.

[0068] Other technical features and effects are consistent with the first embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 The explanation content.

[0069] Please refer to Figure 6 , Figure 6 This is a cross-sectional schematic diagram of the fourth embodiment of the present invention. The difference between the fourth embodiment and the first embodiment lies in the change of the positions of the first center of the sphere 131 and the second center of the sphere 141, specifically:

[0070] In this embodiment, the first center of the sphere 131 and the second center of the sphere 141 are located on different vertical lines (not shown in the figure).

[0071] Specifically, the setting angle of the second ceramic piece 3 is rotated clockwise (or counterclockwise, which is not limited here) by a certain angle around the center of the second sphere. The horizontal plane a is parallel to the shell 1, and the projection of the first sphere center 131 on the horizontal plane a and the projection of the second sphere center 141 on the horizontal plane a are spaced apart by a predetermined distance.

[0072] Other technical features and effects are consistent with the first embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 The explanation content.

[0073] Please refer to Figures 7-8 , Figure 7 This is a cross-sectional view of the fifth embodiment of this utility model. Figure 8 This is a top view of the fifth embodiment of the present invention. The difference between the fifth embodiment and the first embodiment is that the internal space of the housing 1 is changed, specifically:

[0074] In this embodiment, in addition to the first limiting space 11 and the second limiting space 12, a third limiting space 17 is also included. The third limiting space 17 is disposed inside the housing 1. A third ceramic plate 5 is disposed on the third limiting space 17 and located on the surface of the third spherical space 18. The radius of the third spherical space 18 can be greater than, equal to, or less than the radius of the first limiting space 11 (or the second limiting space 12), and is not limited here. In the direction of ultrasonic wave focusing, the ultrasonic wave generated by the third ceramic plate 5 passes through the third spherical center 181 of the third spherical space 18.

[0075] In this embodiment, when viewed from above, the first limiting space 11, the second limiting space 12, and the third limiting space 17 are arranged adjacent to each other.

[0076] Specifically, the first limiting space 11 and the second limiting space 12 are arranged adjacent to each other, and the third limiting space 17 is also arranged adjacent to the first limiting space 11.

[0077] More specifically, please refer to Figure 8 In this embodiment, the first limiting space 11 is located inside the third limiting space 17, and the second limiting space 12 is located inside the first limiting space 11. This means that when viewed from the direction of ultrasonic focusing, the second limiting space 12, the first limiting space 11, and the third limiting space 17 are arranged in a circular ring structure.

[0078] Of course, the positional relationship between the first limiting space 11, the second limiting space 12, and the third limiting space 17 can also be that the first limiting space 11 is located inside the second limiting space 12, and the third limiting space 17 is located inside the first limiting space 11 (since it is only in...). Figure 8 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0079] Please refer to Figure 7In this embodiment, the first sphere center 131, the second sphere center 141, and the third sphere center 181 are located on the same vertical line (not shown in the figure). The horizontal plane a is parallel to the shell 1, and the projections of the first sphere center 131, the second sphere center 141, and the third sphere center 181 on the horizontal plane a are located at the same position.

[0080] Given that the first ceramic sheet 2 and the second ceramic sheet 3 generate the first focal point 132 and the second focal point 142 through the inverse piezoelectric effect, by applying a voltage to the third ceramic sheet 5, it emits ultrasonic waves in the direction of the third sphere center 181 until the third focal point 182 is formed (for better representation, the position of the third focal point 182 is set on the third sphere center 181).

[0081] Other technical features and effects are consistent with the first embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 The explanation content.

[0082] Please refer to Figure 9 , Figure 9 This is a top view of the sixth embodiment of the present invention. The difference between the sixth embodiment and the fifth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0083] In this embodiment, the first limiting space 11 and the second limiting space 12 are arranged adjacent to each other, and the third limiting space 17 and the first limiting space 11 are arranged adjacent to each other. Please refer to [the relevant documentation] for details. Figure 9 When viewed from above, the first limiting space 11 is located in one side of the interior space of the housing 1, the second limiting space 12 is located in the other side of the interior space of the housing 1, and the third limiting space 17 is located inside the first limiting space 11.

[0084] Of course, the positional relationship between the first limiting space 11, the second limiting space 12, and the third limiting space 17 can also be such that, when viewed from above, the third limiting space 17 is located in one side of the interior space of the housing 1, the first limiting space 11 is located in the other side of the interior space of the housing 1, and the second limiting space 12 is located inside the first limiting space 11 (since it is only in...). Figure 9 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0085] Other technical features and effects are consistent with those of the fifth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 The explanation content.

[0086] Please refer to Figure 10 , Figure 10 This is a top view of the seventh embodiment of the present invention. The difference between the seventh embodiment and the fifth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0087] In this embodiment, the first limiting space 11 and the second limiting space 12 are arranged adjacent to each other, and the third limiting space 17 and the second limiting space 12 are arranged adjacent to each other.

[0088] Please refer to the details. Figure 10 When viewed from above, the second limiting space 12 is located inside the third limiting space 17, and the first limiting space 11 is located inside the second limiting space 12.

[0089] Of course, the positional relationship between the first limiting space 11, the second limiting space 12, and the third limiting space 17 can also be that the second limiting space 12 is located inside the first limiting space 11, and the third limiting space 17 is located inside the second limiting space 12 (since it is only in...). Figure 10 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0090] Other technical features and effects are consistent with those of the fifth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 The explanation content.

[0091] Please refer to Figure 11 , Figure 11 This is a top view of the eighth embodiment of the present invention. The difference between the eighth embodiment and the seventh embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0092] In this embodiment, the first limiting space 11 and the second limiting space 12 are arranged adjacent to each other, and the third limiting space 17 and the second limiting space 12 are arranged adjacent to each other. See details below. Figure 11 When viewed from above, the first limiting space 11 is located in one side of the interior space of the housing 1, the second limiting space 12 is located in the other side of the interior space of the housing 1, and the third limiting space 17 is located inside the second limiting space 12.

[0093] Of course, the positional relationship between the first limiting space 11, the second limiting space 12, and the third limiting space 17 can also be such that, when viewed from above, the third limiting space 17 is located in one side of the interior space of the housing 1, the second limiting space 12 is located in the other side of the interior space of the housing 1, and the first limiting space 11 is located inside the second limiting space 12 (since it is only in...). Figure 11 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0094] Other technical features and effects are consistent with those of the seventh embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 , Figure 10 The explanation content.

[0095] Please refer to Figure 12 , Figure 12 This is a top view of the ninth embodiment of the present invention. The difference between the ninth embodiment and the fifth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0096] In this embodiment, the first limiting space 11, the second limiting space 12, and the third limiting space 17 are arranged adjacent to each other.

[0097] Specifically, please refer to Figure 12 The second limiting space 12 and the third limiting space 17 are arranged adjacently and are together located inside the first limiting space 11.

[0098] Alternatively, the first limiting space 11 and the third limiting space 17 are arranged adjacently and together within the second limiting space 12 (since it is only in...). Figure 12 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0099] Alternatively, the first limiting space 11 and the second limiting space 12 are arranged adjacent to each other and are jointly arranged inside the third limiting space 17 (since it is only in...). Figure 12 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0100] Other technical features and effects are consistent with those of the fifth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 The explanation content.

[0101] Please refer to Figure 13 , Figure 13 This is a top view of the tenth embodiment of the present invention. The difference between the tenth embodiment and the ninth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0102] In this embodiment, based on the fact that the first limiting space 11, the second limiting space 12, and the third limiting space 17 are arranged adjacent to each other, please refer to... Figure 13 When viewed from above, the first limiting space 11 is located in one side of the interior space of the housing 1, the second limiting space 12 is located in the other side of the interior space of the housing 1, and the first limiting space 11 and the second limiting space 12 are arranged in combination around the third limiting space 17.

[0103] Other technical features and effects are consistent with those of the ninth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 , Figure 12 The explanation content.

[0104] Please refer to Figure 14 , Figure 14 This is a top view of the eleventh embodiment of the present invention. The difference between the eleventh embodiment and the ninth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0105] In this embodiment, based on the fact that the first limiting space 11, the second limiting space 12, and the third limiting space 17 are arranged adjacent to each other, please refer to... Figure 14 When viewed from above, the first limiting space 11 is located in the first part of the space inside the shell 1, the second limiting space 12 is located in the second part of the space inside the shell 1, and the third limiting space 17 is located in the remaining part of the space inside the shell 1.

[0106] Other technical features and effects are consistent with those of the ninth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 , Figure 12 The explanation content.

[0107] Please refer to Figure 15 , Figure 15 This is a top view of the twelfth embodiment of the present invention. The difference between the twelfth embodiment and the fifth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0108] In this embodiment, the first limiting space 11 and the second limiting space 12 are spaced apart.

[0109] Specifically, please refer to Figure 15 The third limiting space 17 is located inside the second limiting space 12, and the first limiting space 11 is located inside the third limiting space 17.

[0110] Of course, the positional relationship between the first limiting space 11, the second limiting space 12, and the third limiting space 17 can also be that the third limiting space 17 is located inside the first limiting space 11, and the second limiting space 12 is located inside the third limiting space 17 (since it is only in...). Figure 15 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17, therefore no diagram is drawn.

[0111] Other technical features and effects are consistent with those of the fifth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 The explanation content.

[0112] Please refer to Figure 16 , Figure 16 This is a top view of the thirteenth embodiment of the present invention. The difference between the thirteenth embodiment and the twelfth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0113] In this embodiment, please refer to Figure 16 The first limiting space 11 and the second limiting space 12 are spaced apart inside the third limiting space 17.

[0114] Of course, the positional relationship between the first limiting space 11, the second limiting space 12, and the third limiting space 17 can also be that the first limiting space 11 and the third limiting space 17 are spaced apart inside the second limiting space 12 (since it is only in...). Figure 16 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17, therefore no diagram is drawn.

[0115] Alternatively, the second limiting space 12 and the third limiting space 17 may be spaced apart within the first limiting space 11 (since it is only in...). Figure 16 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17, therefore no diagram is drawn.

[0116] Other technical features and effects are consistent with those of the twelfth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 , Figure 15 The explanation content.

[0117] Please refer to Figure 17 , Figure 17 This is a top view of the fourteenth embodiment of the present invention. The difference between the fourteenth embodiment and the twelfth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0118] In this embodiment, based on the spacing between the first limiting space 11 and the second limiting space 12, please refer to the following for details. Figure 17 The first limiting space 11 is located in one side of the interior space of the housing 1, the third limiting space 17 is located in the other side of the interior space of the housing 1, and the second limiting space 12 is located inside the third limiting space 17.

[0119] Of course, the positional relationship between the first limiting space 11, the second limiting space 12, and the third limiting space 17 can also be such that the second limiting space 12 is located in one side of the interior space of the housing 1, the third limiting space 17 is located in the other side of the interior space of the housing 1, and the first limiting space 11 is disposed inside the third limiting space 17 (since it is only in...). Figure 17 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0120] Other technical features and effects are consistent with those of the twelfth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 , Figure 15 The explanation content.

[0121] Please refer to Figure 18 , Figure 18 This is a top view of the fifteenth embodiment of the present invention. The difference between the fifteenth embodiment and the twelfth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0122] In this embodiment, based on the spacing between the first limiting space 11 and the second limiting space 12, please refer to the following for details. Figure 18 The first limiting space 11 and the second limiting space 12 are disposed at intervals inside the housing 1, and the third limiting space 17 is disposed inside the first limiting space 11.

[0123] Of course, the positional relationship between the first limiting space 11, the second limiting space 12, and the third limiting space 17 can also be such that the first limiting space 11 and the second limiting space 12 are spaced apart inside the housing, and the third limiting space is located inside the second limiting space 12 (since it is only inside...). Figure 18 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0124] Alternatively, the first limiting space 11 and the third limiting space may be disposed alternately inside the housing, and the second limiting space 12 may be disposed inside the third limiting space 17 (since it is only in...). Figure 18 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0125] Alternatively, the first limiting space 11 and the third limiting space 17 may be spaced apart inside the housing, and the second limiting space 12 may be spaced inside the first limiting space 11 (since it is only in...). Figure 18 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0126] Alternatively, the second limiting space 12 and the third limiting space 17 may be spaced apart inside the housing, with the first limiting space 11 located inside the second limiting space 12 (since it is only inside...). Figure 18 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0127] Alternatively, the second limiting space 12 and the third limiting space 17 may be disposed alternately inside the housing, with the first limiting space 11 disposed inside the third limiting space 17 (since it is only in...). Figure 18 Based on this, simple positional changes are made to the first limiting space 11, the second limiting space 12, and the third limiting space 17 (therefore, no diagram is drawn). No limitations are specified here.

[0128] Other technical features and effects are consistent with those of the twelfth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 , Figure 15 The explanation content.

[0129] Please refer to Figure 19 , Figure 19This is a top view of the sixteenth embodiment of the present invention. The difference between the sixteenth embodiment and the twelfth embodiment is that the positions of the first limiting space 11, the second limiting space 12, and the third limiting space 17 are changed, specifically:

[0130] In this embodiment, based on the first limiting space 11 and the second limiting space 12 being set at a predetermined distance apart, the third limiting space 17 is also set at a predetermined distance apart from both the first limiting space 11 and the second limiting space 12. This is equivalent to the first limiting space 11, the second limiting space 12, and the third limiting space 17 being set at intervals between each other.

[0131] Other technical features and effects are consistent with those of the twelfth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 , Figure 15 The explanation content.

[0132] Please refer to Figure 20 , Figure 20 This is a cross-sectional view of the seventeenth embodiment of the present invention. The difference between the seventeenth embodiment and the fifth embodiment is that the positions of the first center of the sphere 131, the second center of the sphere 141, and the third center of the sphere 181 are changed, specifically as follows:

[0133] After rotating the second ceramic piece 3 counterclockwise (or clockwise, it is not limited here) around the second sphere center 141 by a certain angle, and rotating the third ceramic piece 5 clockwise (or counterclockwise, it is not limited here) around the third sphere center 181 by a certain angle, the first sphere center 131, the second sphere center 141 and the third sphere center 181 are located on different vertical lines (not shown in the figure).

[0134] This is equivalent to the projections of the first sphere center 131, the second sphere center 141, and the third sphere center 181 onto the horizontal plane a, which are parallel to the shell 1, being spaced apart by a predetermined distance from each other.

[0135] Other technical features and effects are consistent with those of the fifth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 The explanation content.

[0136] Please refer to Figure 21 , Figure 21 This is a cross-sectional view of the eighteenth embodiment of the present invention. The difference between the eighteenth embodiment and the fifth embodiment is that the positions of the first center of the sphere 131, the second center of the sphere 141, and the third center of the sphere 181 are changed, specifically as follows:

[0137] Rotate the third ceramic piece 5 clockwise (or counterclockwise, it is not limited here) around the third sphere center 181 by a certain angle. At this time, the first sphere center 131 and the second sphere center 141 are located on the same vertical line (not shown in the figure), and the third sphere center 181 is located on another vertical line (not shown in the figure).

[0138] This is equivalent to the projection of the first sphere center 131 onto the horizontal plane a, which is parallel to the shell 1, and the projection of the second sphere center 141 onto the horizontal plane a, which are located at the same position. The projection of the third sphere center 181 onto the horizontal plane a is separated from the projection of the first sphere center 131 onto the horizontal plane a and the projection of the second sphere center 141 onto the horizontal plane a by a predetermined distance.

[0139] Other technical features and effects are consistent with those of the fifth embodiment, and will not be repeated here. Please refer to the above description for details. Figures 1 to 3 , Figure 7 , Figure 8 The explanation content.

Claims

1. A multifocal ultrasonic transducer, characterized in that, include: Shell, first ceramic plate, and second ceramic plate; A first limiting space and a second limiting space are provided inside the shell. The first ceramic sheet is disposed in the first limiting space and is located on the surface of the first spherical space. The second ceramic sheet is disposed in the second limiting space and is located on the surface of the second spherical space. The radius of the first spherical space is smaller or larger than the radius of the second spherical space. In the direction of ultrasonic wave focusing, the ultrasonic wave generated by the first ceramic plate passes through the first center of the first spherical space, and the ultrasonic wave generated by the second ceramic plate passes through the second center of the second spherical space.

2. The multifocal ultrasonic transducer according to claim 1, characterized in that: When viewed from above, the first limiting space and the second limiting space are arranged adjacent to each other.

3. The multifocal ultrasonic transducer according to claim 2, characterized in that: The first limiting space is located inside the second limiting space, or the second limiting space is located inside the first limiting space.

4. The multifocal ultrasonic transducer according to claim 2, characterized in that: The first limiting space is located in one side of the interior space of the housing, and the second limiting space is located in the other side of the interior space of the housing.

5. The multifocal ultrasonic transducer according to claim 4, characterized in that: When viewed from above, the projected area of ​​the first limiting space on the horizontal plane is greater than, equal to, or less than the projected area of ​​the second limiting space on the horizontal plane.

6. The multifocal ultrasonic transducer according to any one of claims 2-5, characterized in that: A first fixing structure and a second fixing structure are provided inside the shell. The second fixing structure is connected to the outer wall of the first fixing structure and the inner wall of the shell, respectively. The space inside the first fixing structure is defined as the first limiting space, and the space between the first fixing structure and the inner wall of the shell is defined as the second limiting space. The first ceramic sheet is disposed on the first fixing structure, and the second ceramic sheet is disposed on the second fixing structure.

7. The multifocal ultrasonic transducer according to claim 1, characterized in that: When viewed from above, the first limiting space and the second limiting space are set at a predetermined distance apart.

8. The multifocal ultrasonic transducer according to claim 1, characterized in that: The first center of the sphere and the second center of the sphere are located on the same vertical line.

9. The multifocal ultrasonic transducer according to claim 1, characterized in that: The first center of the sphere and the second center of the sphere are located on different vertical lines.

10. The multifocal ultrasonic transducer according to claim 2 or 7, characterized in that: It also includes a third limiting space, which is disposed inside the housing, and a third ceramic plate is disposed on the third limiting space and located on the surface of the third spherical space; In the direction of ultrasonic wave focusing, the ultrasonic wave generated by the third ceramic sheet passes through the third center of the third spherical space.

11. The multifocal ultrasonic transducer according to claim 10, characterized in that: When viewed from above, the first limiting space, the second limiting space, and the third limiting space are arranged adjacent to each other; or the first limiting space, the second limiting space, and the third limiting space are arranged adjacent to each other.

12. The multifocal ultrasonic transducer according to claim 11, characterized in that: The second limiting space is disposed inside the third limiting space, and the first limiting space is disposed inside the second limiting space; Alternatively, the first limiting space may be located inside the third limiting space, and the second limiting space may be located inside the first limiting space. Alternatively, the first limiting space may be located inside the second limiting space, and the third limiting space may be located inside the first limiting space. Alternatively, the second limiting space may be located inside the first limiting space, and the third limiting space may be located inside the second limiting space. Alternatively, the third limiting space may be located inside the second limiting space, and the first limiting space may be located inside the third limiting space. Alternatively, the third limiting space may be located inside the first limiting space, and the second limiting space may be located inside the third limiting space. Alternatively, the second limiting space and the third limiting space may be adjacent and disposed inside the first limiting space; Alternatively, the first limiting space and the third limiting space may be adjacent to each other and disposed inside the second limiting space; Alternatively, the first limiting space and the second limiting space may be adjacent to each other and disposed inside the third limiting space; Alternatively, the first limiting space and the second limiting space may be disposed alternately within the third limiting space; Alternatively, the first limiting space and the third limiting space may be disposed alternately within the second limiting space; Alternatively, the second limiting space and the third limiting space may be disposed alternately within the first limiting space.

13. The multifocal ultrasonic transducer according to claim 11, characterized in that: The first limiting space is located in one side of the interior space of the housing, the second limiting space is located in the other side of the interior space of the housing, and the third limiting space is disposed inside the first limiting space; Alternatively, the first limiting space is located in one side of the interior space of the housing, the second limiting space is located in the other side of the interior space of the housing, and the third limiting space is disposed inside the second limiting space; Alternatively, the third limiting space may be located in one side of the interior space of the housing, the first limiting space may be located in the other side of the interior space of the housing, and the second limiting space may be located inside the first limiting space. Alternatively, the third limiting space may be located in one side of the interior space of the housing, the second limiting space may be located in the other side of the interior space of the housing, and the first limiting space may be located inside the second limiting space. Alternatively, the first limiting space is located in one side of the interior space of the housing, the second limiting space is located in the other side of the interior space of the housing, and the first limiting space and the second limiting space are arranged in cooperation around the third limiting space; The first limiting space is located in one side of the interior space of the housing, the third limiting space is located in the other side of the interior space of the housing, and the second limiting space is disposed inside the third limiting space; Alternatively, the second limiting space is located in one side of the interior space of the housing, the third limiting space is located in the other side of the interior space of the housing, and the first limiting space is disposed inside the third limiting space; Alternatively, the first limiting space is located in a first part of the space inside the housing, the second limiting space is located in a second part of the space inside the housing, and the third limiting space is located in the remaining part of the space inside the housing.

14. The multifocal ultrasonic transducer according to claim 11, characterized in that: The first limiting space and the second limiting space are disposed at intervals inside the housing, and the third limiting space is disposed inside the first limiting space; Alternatively, the first limiting space and the second limiting space may be disposed inside the housing at intervals, and the third limiting space may be disposed inside the second limiting space; Alternatively, the first limiting space and the third limiting space may be disposed inside the housing at intervals, and the second limiting space may be disposed inside the third limiting space; Alternatively, the first limiting space and the third limiting space may be disposed inside the housing at intervals, and the second limiting space may be disposed inside the first limiting space; Alternatively, the second limiting space and the third limiting space may be disposed alternately inside the housing, with the first limiting space disposed inside the second limiting space; Alternatively, the second limiting space and the third limiting space may be disposed alternately inside the housing, with the first limiting space disposed inside the third limiting space.

15. The multifocal ultrasonic transducer according to claim 10, characterized in that: The first limiting space, the second limiting space, and the third limiting space are arranged at intervals.

16. The multifocal ultrasonic transducer according to claim 10, characterized in that: The first center of the sphere, the second center of the sphere, and the third center of the sphere are located on the same vertical line; Alternatively, the first center of the sphere, the second center of the sphere, and the third center of the sphere may be located on different vertical lines; Alternatively, among the first, second, and third sphere centers, two are located on the same vertical line, and the remaining one is located on another vertical line.

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