A high intensity focused ultrasound transducer

Abstract

The present invention discloses a high-intensity focused ultrasonic transducer, including a transducer bracket and a focusing piezoelectric sheet, wherein the transducer bracket is an integrally formed structure, wherein the focusing piezoelectric sheet is installed in the transducer bracket by gluing, and a positioning column is provided inside the transducer bracket, wherein the positioning column includes an outer positioning protrusion and an inner positioning protrusion, wherein an inner ring glue groove is formed between the outer positioning protrusion and the inner positioning protrusion, wherein the top of the outer positioning protrusion forms a positioning surface, and a gap is left between the outer surface of the inner positioning protrusion and the inner side surface of the inner ring of the focusing piezoelectric sheet to form an inner ring glue injection port. The present invention only requires a bracket to complete the positioning and support of the piezoelectric sheet, and the operation is simple and easy to ensure accuracy; the negative electrode lead is then led out from the front through the wiring groove to improve the reliability of the lead; the sealing is performed by glue sealing, and the soft elasticity of the glue is utilized to ensure the stability of the sound output, and the internal stress of the piezoelectric ceramic is reduced to prevent the piezoelectric ceramic from being brittlely fractured.

Description

Technical Field

[0001] The invention relates to a high-intensity focused ultrasonic transducer and belongs to the field of medical equipment. Background Art

[0002] With the continuous development of ultrasound technology and the continuous improvement of medical standards, high-intensity focused ultrasound diagnosis and treatment systems have developed rapidly in the field of precision non-invasive treatment. The working mode of the power ultrasound device is to emit focused power ultrasound from outside the human body to the human body, forming a large energy concentration in a specific area of ​​the human body and changing the biological characteristics of the tissues in the area to achieve the purpose of treating the disease. The existing high-intensity focused ultrasound is generally a spherical crown self-focusing single-channel ultrasonic transducer, and the piezoelectric ceramic is a single spherical crown or multiple pieces are spliced ​​into a spherical crown to achieve the self-focusing effect. In terms of installation, mechanical structures and fixtures are currently used for positioning and support fixation. Too many matching devices cause limitations in the spatial structure, large cumulative errors in the installation matching accuracy, complex lead-in methods, and large forces on piezoelectric ceramics; which in turn affects the transducer target position accuracy, unstable power output, limited output area loss, and easy stress brittle fracture of piezoelectric ceramics. Summary of the invention

[0003] The main purpose of the present invention is to solve the problems of the existing transducer assembly process, large cumulative assembly errors, complicated lead wires and risks in contact reliability, and further provide an integrated high-intensity focused ultrasonic transducer. The focused ultrasonic transducer only requires a bracket to complete the positioning and support of the piezoelectric sheet, which is simple to operate and easy to ensure accuracy; the negative lead wire is then led out from the front through a wiring groove to improve the reliability of the lead wire; the sealing method uses glue sealing, utilizing the soft elasticity of the glue to ensure the stability of the sound output, and reduce the internal stress of the piezoelectric ceramic to prevent the piezoelectric ceramic from brittle fracture.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a high-intensity focused ultrasound transducer, including a transducer bracket and a focusing piezoelectric sheet, the transducer bracket is an integrally formed structure, the focusing piezoelectric sheet is installed in the transducer bracket by gluing, and a positioning column is provided inside the transducer bracket, the positioning column is provided with a positioning surface and an inner ring glue groove, the positioning surface is used to support the inner ring of the focusing piezoelectric sheet, and an inner ring glue injection port is reserved above the inner ring glue groove.

[0005] Furthermore, the positioning column includes an outer positioning protrusion and an inner positioning protrusion, an inner ring glue groove is formed between the outer positioning protrusion and the inner positioning protrusion, the top of the outer positioning protrusion forms a positioning surface, and a gap is left between the outer surface of the inner positioning protrusion and the inner side surface of the inner ring of the focusing piezoelectric sheet to form an inner ring glue injection port.

[0006] Furthermore, the outer surface of the inner positioning protrusion is composed of an arc surface and at least one plane, and an inner ring glue injection port is formed between the plane and the inner side surface of the inner ring of the focusing piezoelectric sheet.

[0007] Furthermore, the height of the inner positioning protrusion is higher than that of the outer positioning protrusion.

[0008] Furthermore, the convex surface of the focusing piezoelectric sheet is welded with a positive electrode lead, and the concave surface is welded with a negative electrode lead.

[0009] Furthermore, a wiring groove is provided below the transducer bracket, and the wiring groove is communicated with the inner ring glue groove and the inner ring glue injection port.

[0010] Furthermore, the positive electrode lead and the negative electrode lead are brought together and fixed by a wire fixing sleeve installed at the bottom of the transducer bracket and then led out.

[0011] Furthermore, an outer ring glue groove is provided on the inner side of the upper part of the transducer bracket, a back glue injection port is provided on the bottom, and the back glue injection port is connected to the outer ring glue groove.

[0012] Furthermore, the back glue injection port is sealed by a sealing gasket.

[0013] The beneficial effects of the present invention are as follows:

[0014] (1) The transducer bracket is formed in one piece, with high installation and positioning accuracy, which greatly reduces the cumulative dimensional error and can improve the position accuracy of the transducer focusing target. The one-piece bracket has fewer accessories, is easy to install, and has a higher degree of engineering.

[0015] (2) The axial positioning column and spherical positioning surface of the bracket ensure the positioning accuracy of the piezoelectric ceramics with higher consistency.

[0016] (3) The positive electrode is welded on the convex surface of the piezoelectric ceramic, and the negative electrode is welded on the concave surface of the piezoelectric ceramic through the wiring groove reserved in the bracket. The lead-in is convenient and has higher reliability than the lead-in method of physical contact.

[0017] (4) The piezoelectric ceramics and the bracket are glued together, and the glued parts do not block the emitting surface, maximizing the emitting area. The colloid is elastic relative to the mechanical structure, which greatly reduces the mechanical sensitivity of the piezoelectric ceramics and improves the stability of the ultrasonic output. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall cross-sectional structural diagram of the present invention.

[0019] Figure 2 It is an exploded schematic diagram of the present invention.

[0020] Markings in the figure are: 1-transducer bracket, 2-focusing piezoelectric sheet, 3-positioning column, 4-inner ring glue groove, 5-outer positioning protrusion, 6-inner positioning protrusion, 7-positioning surface, 8-inner ring glue injection port, 9-positive lead, 10-negative lead, 11-wiring groove, 12-wire sleeve, 13-back glue injection port, 14-outer ring glue groove, 15-sealing gasket. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 and 2 As shown, a high-intensity focused ultrasound transducer includes a transducer bracket 1 and a focusing piezoelectric sheet 2, wherein the transducer bracket 1 is an integrally formed structure, and the focusing piezoelectric sheet 2 is installed in the transducer bracket 1 by gluing, and a positioning column 3 is provided inside the transducer bracket 1, and a positioning surface 7 and an inner ring glue groove 4 are provided on the positioning column 3, wherein the positioning surface 7 is used to support the inner ring of the focusing piezoelectric sheet 2, and an inner ring glue injection port is reserved above the inner ring glue groove 4.

[0023] In this embodiment, the positioning column 3 includes an external positioning protrusion 5 and an internal positioning protrusion 6, an inner ring glue groove 4 is formed between the external positioning protrusion 5 and the inner positioning protrusion 6, a positioning surface 7 is formed at the top of the external positioning protrusion 5, and a gap is left between the outer surface of the internal positioning protrusion 6 and the inner side surface of the inner ring of the focusing piezoelectric sheet 2 to form an inner ring glue injection port 8.

[0024] As a preference, the outer surface of the inner positioning protrusion 6 is composed of an arc surface and at least one plane, and an inner ring glue injection port is formed between the plane and the inner side surface of the inner ring of the focusing piezoelectric sheet.

[0025] In this embodiment, the positive lead 9 is welded on the convex surface of the focusing piezoelectric sheet, and the negative lead 10 is welded on the concave surface. A wiring groove 11 is provided below the transducer bracket 1, and the wiring groove 11 is connected to the inner ring glue groove 4 and the inner ring glue injection port 8. At the same time, the positive lead 9 and the negative lead 10 are converged and fixed through the fixed wire sleeve 12 installed at the bottom of the transducer bracket 1 and then led out.

[0026] In this embodiment, an outer ring glue groove 14 is provided on the upper inner side of the transducer bracket 1, and a back glue injection port 13 is provided on the bottom, and the back glue injection port 13 is connected to the outer ring glue groove 14. Glue is injected through the back glue injection port 13 until it overflows and enters the outer ring glue groove 14. After injection, the back glue injection port 13 is sealed by a sealing gasket 15.

[0027] In summary, the focusing piezoelectric ceramic piece of the present invention can ensure the axial position accuracy through the positioning column, and then be installed to fit the positioning surface to ensure the depth direction accuracy; the positive lead passes through the wire fixing sleeve and the positive wire outlet hole, and is welded to the convex surface of the piezoelectric ceramic, and the negative lead passes through the wire fixing sleeve, the negative wiring groove and the negative wire outlet hole and is welded to the concave surface of the piezoelectric ceramic; the inner ring rubber groove seals the joint between the inner ring of the piezoelectric ceramic and the bracket, and the outer ring rubber groove seals the joint between the outer ring of the piezoelectric ceramic and the bracket, and finally the sealing gasket and the wire fixing sleeve are fixed and packaged.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the protection scope of the present invention in any form, and all technical solutions obtained by equivalent replacement and the like fall within the protection scope of the present invention.

[0029] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A high-intensity focused ultrasound transducer, comprising a transducer support and a focusing piezoelectric sheet, characterized in that: The transducer bracket is an integrally formed structure, and the focusing piezoelectric sheet is installed in the transducer bracket by gluing. At the same time, a positioning column is provided inside the transducer bracket, and a positioning surface and an inner ring glue groove are provided on the positioning column. The positioning surface is used to support the inner ring of the focusing piezoelectric sheet, and an inner ring glue injection port is reserved above the inner ring glue groove; The positioning column includes an outer positioning protrusion and an inner positioning protrusion, an inner ring glue groove is formed between the outer positioning protrusion and the inner positioning protrusion, the top of the outer positioning protrusion forms a positioning surface, and a gap is left between the outer surface of the inner positioning protrusion and the inner side surface of the inner ring of the focusing piezoelectric sheet to form an inner ring glue injection port; The convex surface of the focusing piezoelectric sheet is welded with a positive lead, and the concave surface is welded with a negative lead; a wiring groove is provided below the transducer bracket, and the wiring groove is connected to the inner ring glue groove and the inner ring glue injection port; An outer ring glue groove is arranged on the inner side of the upper part of the transducer bracket, and a back glue injection port is arranged on the bottom, and the back glue injection port is communicated with the outer ring glue groove.

2. A high intensity focused ultrasound transducer according to claim 1, characterized in that: The outer surface of the inner positioning protrusion is composed of an arc surface and at least one plane, and an inner ring glue injection port is formed between the plane and the inner side surface of the inner ring of the focusing piezoelectric sheet.

3. A high intensity focused ultrasound transducer according to claim 1, characterized in that: The height of the inner positioning protrusion is higher than that of the outer positioning protrusion.

4. A high intensity focused ultrasound transducer according to claim 1, characterized in that: The positive electrode lead and the negative electrode lead are brought together and fixed by a wire fixing sleeve installed at the bottom of the transducer bracket and then led out.

5. A high intensity focused ultrasound transducer according to claim 1, characterized in that: The back glue injection port is sealed by a sealing gasket.

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