CN220046876U - Low temperature rise focusing therapeutic ultrasonic probe - Google Patents

Abstract

The utility model relates to the technical field of ultrasonic probes, in particular to a low-temperature-rise focusing therapeutic ultrasonic probe which comprises a shell, wherein a PCB (printed circuit board) is arranged in the shell, a cable is connected to the PCB, the front end of the shell is connected with a first lens and a second lens, the second lens is positioned on the outer side of the first lens, the first lens is made of high-sound-speed high-heat-conduction materials, the second lens is made of low-sound-speed high-polymer materials, a piezoelectric wafer is connected to the first lens, the piezoelectric wafer is arranged in a ring shape, the piezoelectric wafer is electrically connected with the PCB, so that the positions of the first lens and the second lens corresponding to the piezoelectric wafer are utilized for focusing, the absorption of ultrasonic energy in a lens layer is reduced, the energy loss is reduced, the middle part of the second lens is a part with non-sound transmission, the middle part of the first lens is not subjected to ultrasonic transmission, and the tail part of the first lens is connected with a radiator. The utility model has the effects of improving the temperature rise of the compound lens and prolonging the service life of the transducer.

Description

Low temperature rise focusing therapeutic ultrasonic probe

Technical Field

The utility model relates to the technical field of ultrasonic probes, in particular to a low-temperature-rise focusing therapeutic ultrasonic probe.

Background

Generally, medical science focuses ultrasonic waves in a human body to reach a certain ultrasonic intensity at a focus point, and uses the thermal effect or cavitation effect of the focused ultrasonic waves to treat certain diseases in the deep part of the human body without damaging superficial human skin and tissues.

In the prior art, chinese patent publication No. CN111840829a discloses a multi-layer lens focusing ultrasonic probe, referring to fig. 1, a flat piezoelectric ceramic plate is adopted to generate ultrasonic waves, and at least two layers of acoustic lenses are attached to the flat piezoelectric ceramic plate for focusing; wherein one layer of acoustic lens is a concave lens made of high sound speed material; the other layer of acoustic lens is a convex lens made of low-sound-velocity material; the transmission acoustic lens is a concave lens made of high sound speed material; the other layer of acoustic lens is a convex lens made of a low acoustic speed material. A concave lens prepared by sequentially attaching a high sound speed material to a flat piezoelectric ceramic plate; convex lens made of low sound speed material.

With respect to the above-described related art, the inventors consider that there are the following drawbacks: in practical use, the acoustic lens made of high-sound-velocity materials has very small absorption to ultrasound, the low-sound-velocity acoustic lens is made of high-molecular materials and has the characteristic of absorption to ultrasound, huge loss can be generated, the lost ultrasound energy is finally completely converted into heat energy, the high-molecular materials are poor conductors of heat, are the parts with the largest heating in the whole part, can even reach the degree of material denaturation after long-time working, do not meet the safety requirement of use, and can cause the acceleration damage of the transducer.

In particular, for transducers with short focal length (for example, focal length is less than 50 mm), the radius of curvature of the lens becomes smaller, the thickness of the center of the second lens becomes rapidly larger, the condition of medium absorption and heating in sound propagation becomes more serious, the radiation efficiency becomes lower, and the surface temperature of the transducer is rapidly increased, so that the clinical use requirement cannot be met.

Disclosure of Invention

In order to solve the problem of temperature rise of the compound lens and prolong the service life of the transducer, the utility model provides a low temperature rise focusing therapeutic ultrasonic probe.

The utility model provides a low temperature rise focusing therapeutic ultrasonic probe which adopts the following technical scheme:

the utility model provides a low temperature rise focus treatment ultrasonic probe, includes the shell, and the shell is inside to be provided with the PCB board, is connected with the cable on the PCB board, the front end of shell is connected with first lens and second lens, the second lens is located the outside of first lens, first lens is high heat conduction material of high sound velocity, the second lens is low sound velocity's macromolecular material, be connected with piezoelectric wafer on the first lens, piezoelectric wafer is the ring setting, piezoelectric wafer and PCB board electric connection to utilize first lens and second lens to correspond the position focus of piezoelectric wafer, reduce the absorption of ultrasonic energy at the lens layer, reduce energy loss, the middle part of second lens is its thickness of non-sound propagation and moderately cuts down, the central part of first lens is not conducted ultrasound, is connected with the radiator at its afterbody of conducting heat.

Preferably, the first lens is connected with a temperature sensor, and the temperature sensor is electrically connected to the PCB board.

Preferably, the shell is provided with a heat dissipation hole.

Preferably, the acoustic impedance of the first lens is between the ceramic and the human body (7-20 MPaS/m), the acoustic velocity is more than 4000m/S, and the thermal conductivity is more than 150W/MK.

Preferably, the sound velocity of the second lens is smaller than 2000m/S, and the acoustic impedance is close to that of a human body (1-2 MPaS/m).

In summary, the utility model has the following beneficial technical effects:

according to the low-temperature-rise focusing therapeutic ultrasonic probe provided by the utility model, the thickness in the effective area of the second lens is reduced by using the annular piezoelectric wafer, and the generated heat is reduced compared with the circular wafer under the same power; the circular ring shape can be used for focusing by utilizing the parts of the first lens and the second lens corresponding to the piezoelectric wafer, so that the absorption of ultrasonic energy in the lens layer is reduced, and the energy loss is reduced; because the second lens is a poor conductor of high polymer material and is the part with the largest heat generation in the whole component, the thickness of the middle part of the second lens is a non-working area and can be moderately reduced based on the above, and the heat accumulation in the middle part of the second lens can be reduced, so that the heat is outwards diffused; and the tail end of the first lens is provided with the radiator, and after the heat on the second lens is conducted to the first lens, the heat can be quickly conducted into the shell, so that the temperature of the contact surface between the probe and the human body is effectively reduced, the problem of improving the temperature rise of the composite lens is solved, and the service life of the transducer is prolonged.

Drawings

FIG. 1 is a schematic diagram of a multi-layer lens focused ultrasound probe in the specification;

fig. 2 is a schematic structural diagram of a low temperature rise focused therapeutic ultrasound probe in an embodiment of the utility model.

Reference numerals illustrate: 1. a housing; 11. a heat radiation hole; 2. a PCB board; 3. a cable; 4. a first lens; 5. a second lens; 6. a piezoelectric wafer; 7. a heat sink; 8. a temperature sensor.

Detailed Description

The present utility model will be described in further detail with reference to fig. 2.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two original parts. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The embodiment of the utility model discloses a low-temperature rise focusing therapeutic ultrasonic probe. Referring to fig. 2, the temperature rising focusing therapeutic ultrasonic probe includes a housing 1, a PCB board 2 is provided inside the housing 1, a cable 3 is connected to the PCB board 2, a first lens 4 and a second lens 5 are connected to the front end of the housing 1, the second lens 5 is located at the outer side of the first lens 4, the first lens 4 is made of a high heat conductive material (for example, aluminum) with high sound speed, the sound speed is greater than 4000m/S, the heat conductivity coefficient is greater than 150W/MK, the second lens 5 is made of a high molecular material with low sound speed, the sound speed is less than 2000m/S, the sound resistance is close to the human body (1-2 mpa/m), a piezoelectric wafer 6 is connected to the first lens 4, the piezoelectric wafer 6 is arranged in a circular ring shape, the piezoelectric wafer 6 is electrically connected to the PCB board 2, the first lens 4 and the second lens 5 are focused corresponding to the part of the piezoelectric wafer, the absorption of ultrasonic energy in the lens layer is reduced, the energy loss is reduced, and the effective power of the second lens 5 is reduced compared with the heat generated in the circular wafer by using a circular wafer 6; the transducer improves the emission efficiency by 30% due to the reduction of the absorption loss of the second lens 5; the second lens 5 is a poor thermal conductor and is the part with the largest heat generation in the whole component, so the thickness of the middle part of the second lens 5 is a part with non-acoustic transmission based on the above, the thickness of the middle part of the second lens 5 can be moderately reduced, the heat can be reduced to gather in the middle part of the second lens 5, the heat is outwards diffused, the central part of the first lens 4 is not subjected to ultrasonic conduction, the tail part of the first lens is connected with a radiator 7 for heat conduction, and when the heat on the second lens 5 is conducted to the first lens 4, the heat can be quickly conducted into the shell 1, the temperature of the contact surface of a probe and a human body is effectively reduced, and the problem of improving the temperature rise of the composite lens is solved.

The temperature sensor 8 is connected to the first lens 4, the temperature sensor 8 is electrically connected to the PCB 2, and the temperature on the first lens 4 can be monitored in real time through the temperature sensor 8.

The shell 1 is provided with the heat dissipation holes 11 so as to conduct heat in the shell 1 to the outside of the shell 1, avoid heat accumulation in the shell 1 and be beneficial to reducing the temperature on the second lens 5.

And the circular piezoelectric wafer 6 is used, the focus of the circular piezoelectric wafer is consistent with that of a circular wafer, and the difficulty of focusing the high-power plane wafer with a short focal length (focal length is less than 50 mm) is solved.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (5)

1. The utility model provides a low temperature rise focus treatment ultrasonic probe, includes shell (1), and shell (1) inside is provided with PCB board (2), is connected with cable (3), its characterized in that on PCB board (2): the front end of shell (1) is connected with first lens (4) and second lens (5), second lens (5) are located the outside of first lens (4), first lens (4) are high heat conduction material of high sound velocity, second lens (5) are low sound velocity's macromolecular material, be connected with piezoelectric wafer (6) on first lens (4), piezoelectric wafer (6) are the ring setting, piezoelectric wafer (6) and PCB board (2) electric connection to utilize first lens (4) and second lens (5) to correspond the position focus of piezoelectric wafer, reduce the absorption of ultrasonic energy at the lens layer, reduce energy loss, the middle part of second lens (5) is its thickness moderate reduction of non-sound propagation's position, the central part of first lens (4) is not conducted ultrasound, is conducted heat its afterbody and is connected with radiator (7).

2. The low temperature rising focused therapy ultrasound probe of claim 1, wherein: the first lens (4) is connected with a temperature sensor (8), and the temperature sensor (8) is electrically connected to the PCB (2).

3. The low temperature rising focused therapy ultrasound probe of claim 1, wherein: the shell (1) is provided with a heat dissipation hole (11).

4. The low temperature rising focused therapy ultrasound probe of claim 1, wherein: the acoustic impedance of the first lens is between the ceramic and the human body (7-20 MPaS/m), the acoustic velocity is more than 4000m/S, and the heat conductivity coefficient is more than 150W/MK.

5. The low temperature rising focused therapy ultrasound probe of claim 1, wherein: the sound velocity of the second lens is smaller than 2000m/S, and the acoustic impedance is close to that of a human body (1-2 MPaS/m).