Ultrasonic transducer

Abstract

The present invention discloses an ultrasonic transducer, comprising: a first electrode component and a second electrode component; an insulating component, the insulating component is used to isolate the first electrode component and the second electrode component; a piezoelectric element, the second electrode component abuts the piezoelectric element; a shell, the shell can press the piezoelectric element and is electrically connected to the first electrode component and the piezoelectric element respectively. The present invention utilizes the second electrode component and the piezoelectric element to abut against each other, and the shell electrically connects the first electrode and the piezoelectric element, thereby avoiding the use of welding wires for conduction. The piezoelectric element is pressed by the cooperation of the second electrode component and the shell, and can convert electrical signals into mechanical vibrations based on the piezoelectric effect when powered on, thereby realizing ultrasonic transduction. Since welding wires are not used, the problem of unstable sound wave output caused by the easy detachment of welding wires is solved, and the invention has good application prospects in the field of ultrasonic therapy technology.

Description

Technical Field

[0001] The present invention relates to the technical field of transducers, and in particular to an ultrasonic transducer. Background Art

[0002] Ultrasonic therapy technology is a non-invasive surgical technology that has flourished in recent years. It has been widely used and promoted in clinical medicine because it is non-invasive, harmless, safe, effective and can ensure the safety and integrity of tissues during the treatment process. Ultrasonic transducers are the core part of ultrasonic therapy and are widely used in treatment systems such as gynecological inflammation. Ultrasonic transducers are usually made of piezoelectric ceramics, which use the piezoelectric effect of piezoelectric ceramic materials to convert electrical signals into mechanical vibrations. Ultrasonic transducers in the prior art usually connect electrodes to piezoelectric ceramics by welding wires. The welding points in the form of welding wires will affect the performance of the transducer and are prone to detachment, causing it to malfunction, which will lead to unstable sound wave output of the ultrasonic transducer. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an ultrasonic transducer that can solve the problem of unstable sound wave output.

[0004] In a first aspect, an embodiment of the present invention provides an ultrasonic transducer, comprising:

[0005] a first electrode member and a second electrode member;

[0006] an insulating component, the insulating component being used to isolate the first electrode component from the second electrode component;

[0007] a piezoelectric element, wherein the second electrode member abuts against the piezoelectric element;

[0008] A shell, wherein the shell can press the piezoelectric element and is electrically connected to the first electrode component and the piezoelectric element respectively.

[0009] The ultrasonic transducer of the embodiment of the present invention has at least the following beneficial effects:

[0010] The embodiment of the present invention utilizes the second electrode component and the piezoelectric element to abut against each other, and the shell electrically connects the first electrode and the piezoelectric element, thereby avoiding the use of welding wires for conduction. The piezoelectric element is pressed together by the second electrode component and the shell, and can convert electrical signals into mechanical vibrations based on the piezoelectric effect when power is turned on to achieve ultrasonic transduction. Since welding wires are not used, the problem of unstable sound wave output caused by easy detachment of welding wires is solved, and the invention has good application prospects in the field of ultrasonic therapy technology.

[0011] According to other embodiments of the ultrasonic transducer of the present invention, the second electrode component, the piezoelectric element and the shell are coaxial. The piezoelectric element is usually a piezoelectric ceramic wafer, which is brittle. Since the second electrode component abuts against the piezoelectric element and applies pressure to it, the shell presses the piezoelectric element tightly. When the second electrode component, the piezoelectric element and the shell are coaxial, the pressure of the second electrode component on the piezoelectric element and the pressure of the shell on the piezoelectric element are on the same axis, making the piezoelectric element not easy to break.

[0012] According to other embodiments of the ultrasonic transducer of the present invention, the insulating component is sleeved on the inner side of the first electrode component, and the second electrode component is sleeved on the inner side of the insulating component. In the embodiment of the present invention, the two electrode components of the ultrasonic transducer are made into a sleeved structure, and the ultrasonic transducer can be connected to the power supply by providing a conductive connecting rod matching the end shape of the two electrode components, providing a new installation form, while also avoiding the influence of welding points in the form of welding wires on the performance of the ultrasonic transducer, and improving the feasibility of the transducer and the stability of the sound wave output.

[0013] According to other embodiments of the ultrasonic transducer of the present invention, the second electrode member has a hollow cavity, one end of which is connected to the piezoelectric element. Since the piezoelectric element is prone to heat during operation, circulating water can be introduced into the cavity during operation to cool the piezoelectric element. At the same time, since the piezoelectric element does not need to be connected through a welding wire, the problem of the welding wire in the traditional ultrasonic transducer being easily impacted by the circulating water, causing the welding point to fall off and thus failing to work properly, is avoided.

[0014] According to other embodiments of the ultrasonic transducer of the present invention, a telescopic component is further provided, and the telescopic component can apply pressure to the piezoelectric element by abutting against the second electrode component. Since the telescopic component is provided, when assembling the housing, the piezoelectric element and the second electrode component can be used to compress the telescopic component, so that the telescopic component can abut against the second electrode component to apply pressure to the piezoelectric element, which is convenient for assembly, and the pressure applied by the housing to the piezoelectric element can be flexibly adjusted by adjusting the degree of compression of the telescopic component, thereby adjusting the piezoelectric effect of the piezoelectric element, thereby controlling the intensity of the sound wave output by the ultrasonic transducer.

[0015] According to some other embodiments of the ultrasonic transducer of the present invention, a first step is provided on a side of the insulating component close to the second electrode component, a second step is provided on a side of the second electrode component close to the insulating component, and the telescopic component is provided between the first step and the second step. The steps provided by the insulating component and the second electrode component can be used to fix the telescopic component.

[0016] According to other embodiments of the ultrasonic transducer of the present invention, the piezoelectric element is a curved surface type, and the second electrode component has a curved surface end surface that matches the curved surface of the piezoelectric element. The piezoelectric element is made into a curved surface type, which can play a role of self-focusing, so that the ultrasonic transducer has the advantages of small size, strong sound, concentrated energy, and low loss.

[0017] According to other embodiments of the ultrasonic transducer of the present invention, a conductive gasket is further provided between the housing and the piezoelectric element. The conductive gasket is provided between the housing and the piezoelectric element, which can reduce the squeezing force of the housing on the piezoelectric element while ensuring the electrical path, thereby protecting the piezoelectric element from being easily damaged.

[0018] According to other embodiments of the ultrasonic transducer of the present invention, a positioning boss is provided on the first electrode component, and the positioning boss is used to position the housing. The positioning boss controls the degree of compression of the housing against the piezoelectric element by limiting the position of the housing, thereby controlling the intensity of the output sound wave of the ultrasonic transducer.

[0019] According to other embodiments of the ultrasonic transducer of the present invention, the housing is screwed to the first electrode component. In some embodiments, threads can be provided on the first electrode component and the housing, and the housing can be rotated and fixed by screwing to achieve compression of the piezoelectric element.

[0020] According to other embodiments of the ultrasonic transducer of the present invention, a third step is provided on a side of the first electrode component close to the insulating component, and the insulating component is provided with a fourth step that matches the third step. By providing steps on the first electrode component and the insulating component, the two can be more firmly matched and not easy to slip off. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of the ultrasonic transducer in the first embodiment;

[0022] Figure 2 yes Figure 1 A partial enlarged exploded schematic diagram of the ultrasonic transducer;

[0023] Figure 3 yes Figure 1 A partial enlarged view of the ultrasonic transducer;

[0024] Figure 4 is an exploded view of the ultrasonic transducer in the second embodiment;

[0025] Figure 5 Schematic diagram of the structure of the assembled ultrasonic transducer in the second embodiment. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, if orientation descriptions are involved, the orientations or positional relationships indicated by “up”, “down”, “front”, “back”, “left”, “right”, etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of the embodiments of the present invention, if a feature is referred to as being "set", "fixed", "connected", or "installed" on another feature, it may be directly set, fixed, or connected to the other feature, or it may be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of the present invention, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than", or "exceeds" is involved, it should be understood as not including the number itself, and if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] Reference Figure 1, showing a cross-sectional view of the ultrasonic transducer in the first embodiment. In this embodiment, the ultrasonic transducer 100 includes a first electrode component 110 and a second electrode component 120, the first electrode component 110 and the second electrode component 120 are separated by an insulating component 130, the second electrode component 120 presses against the piezoelectric element 140 from bottom to top, in this embodiment, the piezoelectric element 140 is a piezoelectric ceramic wafer, the housing 150 presses the piezoelectric element 140 from top to bottom through the conductive gasket 160, thereby squeezing the piezoelectric element to generate pressure, in this embodiment, the housing 150 is a conductive housing, one end of the housing 150 is connected to the first electrode The electrode component 110 is directly in electrical contact, and the other end is electrically connected to the piezoelectric element 140 through the conductive gasket 160. In this embodiment, the first electrode component 110 is the positive terminal of the ultrasonic transducer, and the second electrode component 120 is the negative terminal of the ultrasonic transducer. When the first electrode component 110 and the second electrode component 120 are respectively connected to the positive and negative electrodes of the power supply, due to the squeezing effect of the second electrode component 120 and the housing 150 on the piezoelectric element 140, the piezoelectric element 140 converts the electrical signal into mechanical vibration based on the piezoelectric effect to achieve ultrasonic transduction. In this embodiment, the shell 150 is electrically connected to the piezoelectric element 140 through the conductive gasket 160. The purpose is to reduce the squeezing of the piezoelectric element 140 by the shell 150, so as to protect the piezoelectric element 140 from being easily damaged. On the premise that the shell 150 and the piezoelectric element 140 are electrically connected, the shell and the piezoelectric element can be directly contacted and pressed without using a conductive gasket. At this time, in order to reduce the damage to the piezoelectric element that may be caused by the pressing of the shell, the contact part of the shell and the piezoelectric element can be set to an elastic material.

[0030] According to some embodiments of the present invention, the second electrode component 120, the piezoelectric element 140 and the shell 150 can be arranged to be coaxial. At this time, the pressure generated by the second electrode component 120 against the piezoelectric element 140 and the pressure generated by the shell 150 pressing the piezoelectric element 140 are on the same axis. Therefore, the pressure on the upper and lower surfaces of the piezoelectric element 140 is balanced, making the piezoelectric element 140 not easily broken.

[0031] According to some embodiments of the present invention, the insulating component 130 is sleeved on the inner side of the first electrode component 110, and the second electrode component 120 is sleeved on the inner side of the insulating component 130, so that the lower end of the formed ultrasonic transducer exposes the ends of the first electrode component 110 and the second electrode component 120, and electrical conduction between the ultrasonic transducer and the power supply can be achieved by setting a connecting rod or other structure matching the shape of the two electrode ends. At this time, the conduction mode in the form of welding wires can be avoided, thereby avoiding the influence of the welding points of the welding wires on the performance of the ultrasonic transducer, thereby improving the stability of the transducer sound wave output.

[0032] According to some embodiments of the present invention, since the piezoelectric element 140 is prone to generate heat during operation, a hollow cavity 170 may be provided in the second electrode component 120, and circulating water may be introduced into the cavity 170 during operation to cool the piezoelectric element 140. At the same time, since there is no welding wire connecting the piezoelectric element 140, the problem of the conventional ultrasonic transducer failing to work due to the welding points of the welding wire being easily knocked off by the impact of circulating water is avoided.

[0033] According to some embodiments of the present invention, the ultrasonic transducer 100 is further provided with a telescopic component 180, which can be a stainless steel spring. When the housing 150 presses the piezoelectric element 140, the telescopic component 180 can be pressed by the second electrode component 120. The telescopic component 180 uses the reaction force to resist the second electrode component 120, thereby applying pressure to the piezoelectric element 140. The degree of compression of the telescopic component 180 can flexibly adjust the pressure on the piezoelectric element 140, and then the piezoelectric effect of the piezoelectric element 140 can be adjusted to achieve the purpose of flexibly adjusting the intensity of the sound waves output by the ultrasonic transducer.

[0034] See also Figure 2 , Figure 2 yes Figure 1 A partially enlarged exploded schematic diagram of the ultrasonic transducer, a first step 131 is provided on the side of the insulating component 130 close to the second electrode component 120, a second step 121 is provided on the side of the second electrode component close to the insulating component, and the telescopic component 180 is provided between the first step 131 and the second step 121. The first step 131 and the second step 121 can be used to fix the telescopic component 180.

[0035] According to some embodiments of the present invention, a third step 111 is provided on one side of the first electrode component 110 close to the insulating component 130, and the insulating component 130 is provided with a fourth step 132 that matches the third step 111. After assembly, the third step 111 and the fourth step 132 are matched and fixed to each other and are not easy to slip.

[0036] According to some embodiments of the present invention, a positioning boss 112 is provided on the first electrode component 110 to limit the position of the shell 150. Since the shell 150 has a pressing effect on the piezoelectric element, the degree to which the shell 150 presses the piezoelectric element can be regulated by limiting the position of the shell 150, thereby regulating the intensity of the output sound waves of the ultrasonic transducer.

[0037] According to other embodiments of the ultrasonic transducer of the present invention, the outer shell 150 and the first electrode component 110 are screwed together by providing mutually matching threads, and the outer shell is rotatably fixed and the piezoelectric element is pressed by the screwing.

[0038] See also Figure 3 , Figure 3 for Figure 1 A partial enlarged view of the ultrasonic transducer, the piezoelectric element 140 is a curved surface type, which can play a role of self-focusing, and the second electrode component 120 has a curved end surface 122 that matches the curved surface of the piezoelectric element 140. After assembly, the curved end surface 122 fits the piezoelectric element 140 and is used to support the piezoelectric element 140.

[0039] Reference Figure 4 , shows an exploded view of the ultrasonic transducer in the second embodiment. The ultrasonic transducer 100 includes a first electrode component 110, an insulating component 130, a telescopic component 180, a second electrode component 120, a piezoelectric element 140, a conductive gasket 160 and a housing 150. During assembly, the insulating component 130 is sleeved on the inner side of the first electrode component 110, and the second electrode component 120 is sleeved on the inner side of the insulating component 130. The insulating component 130 is used to isolate the polarity of the first electrode component 110 and the second electrode component 120 to distinguish between positive and negative poles. The telescopic component 130 is fixed by a first step on the insulating component 130 and a second step on the second electrode component 120. The piezoelectric element 140 and the conductive gasket 160 are placed on top of the second electrode component 120 in sequence, and finally they are pressed and fixed by the housing 160. The assembled ultrasonic transducer is shown in FIG. Figure 5 When it is necessary to connect the power supply, the ultrasonic transducer can be connected to the power supply by setting a conductive connecting rod that matches the shape of the ends of the two electrode parts, providing a new installation form, while also avoiding the influence of welding points in the form of welding wires on the performance of the ultrasonic transducer, and improving the feasibility of the transducer and the stability of the sound wave output.

[0040] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. An ultrasonic transducer, characterized in that: include: a first electrode member and a second electrode member; an insulating component, the insulating component being used to isolate the first electrode component from the second electrode component; a piezoelectric element, wherein the second electrode member abuts against the piezoelectric element; A shell, wherein the shell can press the piezoelectric element and is electrically connected to the first electrode component and the piezoelectric element respectively.

2. The ultrasonic transducer according to claim 1, characterized in that: The second electrode member, the piezoelectric element and the housing are coaxial.

3. The ultrasonic transducer according to claim 1, characterized in that: The insulating component is sleeved on the inner side of the first electrode component, and the second electrode component is sleeved on the inner side of the insulating component.

4. The ultrasonic transducer according to claim 3, characterized in that: The second electrode member has a hollow cavity, and one end of the cavity is communicated with the piezoelectric element.

5. The ultrasonic transducer according to any one of claims 1 to 4, characterized in that: A telescopic member is also provided, and the telescopic member can apply pressure to the piezoelectric element by abutting against the second electrode member.

6. The ultrasonic transducer according to claim 5, characterized in that: A first step is provided on a side of the insulating component close to the second electrode component, a second step is provided on a side of the second electrode component close to the insulating component, and the telescopic component is provided between the first step and the second step.

7. The ultrasonic transducer according to any one of claims 1 to 4, characterized in that: The piezoelectric element is of a curved surface type, and the second electrode component has a curved end surface matching the curved surface of the piezoelectric element.

8. The ultrasonic transducer according to any one of claims 1 to 4, characterized in that: A conductive gasket is also arranged between the housing and the piezoelectric element.

9. The ultrasonic transducer according to any one of claims 1 to 4, characterized in that: A positioning boss is provided on the first electrode component, and the positioning boss is used to position the shell.

10. The ultrasonic transducer according to any one of claims 1 to 4, characterized in that: A third step is provided on a side of the first electrode component close to the insulating component, and the insulating component is provided with a fourth step matched with the third step.

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