CN112207013A

CN112207013A - An ultrasonic probe for ultrasonic physiotherapy

Info

Publication number: CN112207013A
Application number: CN202011139304.8A
Authority: CN
Inventors: 孔祥清; 蔡菁; 靳遥; 郭瑞彪; 张恩光; 车飞飞
Original assignee: Nanjing Khons Medtech Co ltd
Current assignee: Nanjing Khons Medtech Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-01-12

Abstract

The invention discloses an ultrasonic probe for ultrasonic physiotherapy, which comprises a metal casing or a non-metallic casing, a piezoelectric wafer, an adhesive ring and an insulating ring, and an insulating ring is installed in the top of the metal casing or the non-metallic casing The upper and lower surfaces of the piezoelectric wafer are provided with metal electrode layers, and the piezoelectric wafer is sealed and mounted on the insulating ring through an adhesive ring, the upper surface of the adhesive ring is provided with a conductive layer, and the metal electrodes on the upper surface of the piezoelectric wafer The layer is connected with the conductive layer and the ground level, and the metal electrode layer on the lower surface of the piezoelectric wafer is connected with the positive electrode. The invention can maximize the effective working area of the probe, reduce the adverse effect of the piezoelectric chip electrode on the sound field, and at the same time, by using an additional acoustic collimator, the ultrasonic sound beam of the probe can be changed, the effective treatment area of the probe can be controlled, and the treatment effect can be improved. .

Description

Ultrasonic probe for ultrasonic physiotherapy

Technical Field

The invention relates to an ultrasonic probe for ultrasonic physiotherapy, belonging to the field of ultrasonic transducers.

Background

The ultrasonic therapy is an important component of ultrasonic medicine, and mainly acts a certain dose of ultrasonic waves on human tissues to generate certain biological effects, such as thermal effect, mechanical effect, cavitation effect and the like, so that certain medical purpose is achieved by utilizing the effects, and the ultrasonic therapy is formed. Among them, the treatment of some diseases by using the thermal effect and mechanical effect of ultrasonic waves with lower intensity and by using focused or unfocused acoustic beams to perform 'heating' and mechanical stimulation on the disease parts is called ultrasonic physiotherapy.

The ultrasonic physiotherapy is mainly completed by an ultrasonic therapy apparatus, and the general ultrasonic therapy apparatus consists of a high-frequency power ultrasonic generator and an ultrasonic transducer (namely an ultrasonic probe): the high-frequency electric energy provided by the high-frequency ultrasonic power generator excites the piezoelectric wafer in the ultrasonic transducer through resonance to generate vibration in the thickness direction and radiate ultrasonic waves outwards. An ultrasonic transducer, as a device for energy conversion, mainly comprises a piezoelectric wafer, a matching layer, a backing, a housing, etc., and can convert an excitation electrical signal into an ultrasonic signal into a patient.

Most of the existing ultrasonic probes for ultrasonic physiotherapy (hereinafter referred to as physiotherapy probes) adopt a single non-focusing plane circular piezoelectric ceramic as a piezoelectric wafer, the piezoelectric wafer is provided with a wrapping earth pole, and the positive electrode and the negative electrode of the piezoelectric wafer can be led out from the back of an emitting surface in a lead mode. The physical therapy probe has more defects. Firstly, the ultrasonic physical therapy probe constructed by the method has simple process, but the effective working area of the piezoelectric wafer is reduced due to the adoption of the lead wire in the edge-covered earth electrode mode; meanwhile, the sound field distribution of the physical therapy probe is influenced, and the treatment effect is influenced; the smaller the aperture of the probe is, the larger the proportion of the ground pole area of the edge covering is, and the larger the influence on the sound field is. Secondly, for the non-focusing physiotherapy probe of the type, the aperture is fixed, the effective treatment area is fixed, and for the focus area smaller than the effective area, the overlarge treatment area may cause damage to other non-focus areas of the human body.

Disclosure of Invention

The invention aims to provide an ultrasonic probe for ultrasonic physiotherapy, which adopts a double-sided lead method, maximizes the effective working area of the probe, reduces the adverse effect on a sound field caused by the extraction of a piezoelectric wafer electrode, and is suitable for various types of piezoelectric materials; meanwhile, the ultrasonic sound beam of the probe can be changed by adopting an additional sound collimator mode, the effective treatment area of the probe is controlled, and the treatment effect is improved.

The technical scheme adopted by the invention is as follows:

in one aspect, the invention provides an ultrasonic probe for ultrasonic physiotherapy, which comprises a metal shell, a piezoelectric wafer, an adhesive ring and an insulating ring, wherein the insulating ring is installed in the top end of the metal shell, metal electrode layers are arranged on the upper surface and the lower surface of the piezoelectric wafer, the piezoelectric wafer is hermetically installed on the insulating ring through the adhesive ring, a conductive layer is arranged on the upper surface of the adhesive ring, the metal electrode layer on the upper surface of the piezoelectric wafer is in contact with and conducted with the conductive layer, the conductive layer is in contact with and conducted with the metal shell, and the metal electrode layer on the lower surface of the piezoelectric wafer is insulated from the metal shell through the insulating ring.

Furthermore, the lower surface metal electrode layer of the piezoelectric wafer is connected with the positive electrode, and the upper surface metal electrode layer of the piezoelectric wafer is connected with the ground electrode through the metal shell.

Furthermore, the device also comprises an acoustic collimator matched with the probe, and the acoustic collimator is arranged at one end provided with the piezoelectric wafer.

Furthermore, the inner diameter of the acoustic collimator is consistent with the outer diameter of the probe, and the acoustic collimator and the probe are mutually connected and matched in a threaded mode.

Furthermore, the piezoelectric wafer is made of piezoelectric ceramics, single crystals or piezoelectric composite materials; the conducting layer is made of soldering tin, conducting adhesive or silver foil material; the bonding layer on the inner side and the outer side of the bonding ring is made of epoxy resin materials; the metal shell is made of stainless steel.

On the other hand, the invention also provides an ultrasonic probe for ultrasonic physiotherapy, which comprises a non-metal shell, a piezoelectric wafer, an adhesive ring and an insulating ring, wherein the insulating ring is installed in the top end of the non-metal shell, metal electrode layers are arranged on the upper surface and the lower surface of the piezoelectric wafer, the piezoelectric wafer is hermetically installed on the insulating ring through the adhesive ring, a conducting layer is arranged on the upper surface of the adhesive ring, a ground wire through hole is formed in the non-metal shell on one side of the conducting layer, the upper surface metal electrode layer of the piezoelectric wafer is in contact with and conducted with the conducting layer, the conducting layer is connected with a ground wire in the ground wire through hole, and the lower surface metal electrode layer of the piezoelectric wafer.

The invention has the beneficial effects that:

1. the probe adopts a double-sided lead method, maximizes the effective working area of the probe, reduces the adverse effect of the electrode lead-out of the piezoelectric wafer on the sound field, and is suitable for various piezoelectric wafers such as focusing and non-focusing, single array elements and arrays, round and various shapes, piezoelectric ceramics and various materials, and the like.

2. The probe changes the ultrasonic sound beam of the probe by adopting the mode of the additional acoustic collimator, controls the effective treatment area of the probe and improves the treatment effect.

3. The probe does not increase the difficulty in manufacturing the matching layer and the backing structure of the probe, and the matching layer and the backing structure can be applied to the probe as required, so that the performance of the probe is further improved.

Drawings

FIG. 1 is a disassembled structure view of the first embodiment;

FIG. 2 is an overall structural view of the first embodiment;

FIG. 3 is a schematic structural view of the second embodiment;

FIG. 4 is a schematic structural diagram of the third embodiment.

Labeled as: 1-piezoelectric wafer, 2-adhesive ring, 3-insulating ring, 4-metal shell, 5-conductive layer, 6-acoustic collimator, 7-non-metal shell and 8-ground wire through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment.

As shown in fig. 1 and 2, an ultrasonic probe for ultrasonic physiotherapy comprises a metal shell 4, a piezoelectric wafer 1, an adhesive ring 2 and an insulating ring 3, wherein the insulating ring 3 is installed in the top end of the metal shell 4, metal electrode layers are arranged on the upper surface and the lower surface of the piezoelectric wafer 1, the piezoelectric wafer 1 is hermetically installed on the insulating ring 3 through the adhesive ring 2, a conductive layer is arranged on the upper surface of the adhesive ring 2, the metal electrode layer on the upper surface of the piezoelectric wafer 1 is in contact with and conducted with the conductive layer 5, the conductive layer 5 is in contact with and conducted with the metal shell 4, and the metal electrode layer on the lower surface of the piezoelectric wafer 1 is insulated from the metal shell 4 through the insulating ring 3.

In this embodiment, the lower surface of the piezoelectric wafer 1 is connected to the positive electrode, the upper surface is connected to the ground electrode through the metal casing 4, and the piezoelectric wafer 1 works normally after being turned on. The piezoelectric wafer 1 of the wiring mode does not need to use a wrapping earth pole, and the effective working area of the piezoelectric wafer can be maximized. The adhesive ring can fix the piezoelectric wafer and simultaneously serves as a sealing structure to prevent the probe from water inflow; the insulating ring 3 separates the piezoelectric wafer from the metal case to prevent short circuit. The conductive layer 5 may be solder, conductive adhesive, or silver foil, etc. having good co-current capability; the bonding layer on the bonding ring 2 can be epoxy resin or other materials with good bonding performance to both piezoelectric materials and metal materials; the insulating ring 3 is a structure with good insulating capability and certain supporting capability; the metal casing 4 is preferably made of a material having a certain strength and good conductivity, such as stainless steel.

Specifically, the piezoelectric wafer is single-array-element non-focusing circular piezoelectric ceramic, and the diameter of the piezoelectric wafer is 16 mm; the bonding layer is made of epoxy resin; the insulating ring is made of plastic, the inner diameter is 16.5mm, and the outer diameter is 20 mm; the metal shell is made of stainless steel, the inner diameter is 20.5mm, and the outer diameter is 24 mm; the conductive layer is conductive silver paint. The metal shell and the insulating layer are clamped by a clamp and then are bonded and fixed by epoxy glue, the lead of the metal shell is a coaxial cable, the coaxial cable core wire is welded with the lower surface of the piezoelectric ceramic, and the ground wire is welded with the metal shell. The probe has no matching layer and uses an air backing. The shape of the matched acoustic collimator is shown in figure 4, the inner diameter of the acoustic collimator is 24.2mm, and the acoustic collimator is directly matched with the probe.

Example two.

As shown in fig. 3, an ultrasonic probe for ultrasonic physiotherapy comprises a non-metal shell 7, a piezoelectric wafer 1, a bonding ring 2 and an insulating ring 3, the insulating ring 3 is installed in the top end of the non-metal shell 7, metal electrode layers are arranged on the upper surface and the lower surface of the piezoelectric wafer 1, the piezoelectric wafer 1 is installed on the insulating ring in a sealing mode through the bonding ring, a conducting layer 5 is arranged on the upper surface of the bonding ring 2, a ground wire perforation 8 is arranged on the non-metal shell 7 on one side of the conducting layer 5, the upper surface metal electrode layer of the piezoelectric wafer 1 is in contact with and conducted with the conducting layer 5, meanwhile, the conducting layer 5 is connected with a ground wire in the ground wire perforation 8, and the lower surface metal electrode layer of the piezoelectric wafer 1 is connected.

For some cases where a metal housing cannot be used, the structure shown in fig. 3 may be used.

Example three.

As shown in fig. 4, based on the first and second embodiments, an acoustic collimator 6 may be added, the inner diameter of the acoustic collimator 6 is consistent with the outer diameter of the probe, and the aperture and shape may be improved according to the actual conditions of the treatment region and the size of the lesion. The acoustic collimator 6 is internally provided with coupling materials (such as an ultrasonic coupling agent, water and the like), the ultrasonic emitted by the ultrasonic probe is coupled by the acoustic collimator, the ultrasonic beam of the probe can be changed, the effective treatment area of the probe is controlled, and the treatment effect can be improved under the condition that the focus area is smaller.

In the above embodiments, the piezoelectric wafer used may be in a non-focusing structure or a focusing structure, a single array element or array, a circular or other desired shape, etc. The piezoelectric wafer material can be piezoelectric ceramic, single crystal, piezoelectric composite material and the like which have piezoelectric effect and can be used for preparing the ultrasonic transducer.

In each of the above embodiments, the probe can apply the matching layer and backing structure without increasing the difficulty of construction. And when the probe is matched with the acoustic collimator, the external surface of the physiotherapy probe can be matched with the internal surface of the acoustic collimator by using threads, and the external surface of the physiotherapy probe can also be directly matched with the internal surface of the acoustic collimator.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution methods fall within the scope of the present invention.

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

Claims

1. an ultrasonic probe for ultrasonic physiotherapy, is characterized in that, comprises metal casing, piezoelectric wafer, bonding ring and insulating ring, and insulating ring is installed in the top of described metal casing, and the upper and lower surfaces of described piezoelectric wafer are A metal electrode layer is provided, and the piezoelectric chip is sealed and mounted on the insulating ring through an adhesive ring, the upper surface of the adhesive ring is provided with a conductive layer, and the metal electrode layer on the upper surface of the piezoelectric chip is in contact with the conductive layer and conducts At the same time, the conductive layer is in contact with the metal shell and conducts, and the metal electrode layer on the lower surface of the piezoelectric wafer is insulated from the metal shell through the insulating ring.

2 . An ultrasonic probe for ultrasonic physiotherapy according to claim 1 , wherein the metal electrode layer on the lower surface of the piezoelectric wafer is connected to the positive electrode, and the metal electrode layer on the upper surface of the piezoelectric wafer passes through the metal shell. 3 . Connect to ground.

3 . The ultrasonic probe for ultrasonic physiotherapy according to claim 1 , further comprising an acoustic collimator matched with the probe, and the acoustic collimator is installed at the end provided with the piezoelectric wafer. 4 .

4 . The ultrasonic probe for ultrasonic physiotherapy according to claim 3 , wherein the inner diameter of the acoustic collimator is consistent with the outer diameter of the probe, and the two are connected and matched with each other in the form of threads. 5 .

5 . The ultrasonic probe for ultrasonic physiotherapy according to claim 1 , wherein the piezoelectric wafer is made of piezoelectric ceramic, single crystal or piezoelectric composite material; the conductive layer is made of solder, conductive glue Or silver foil material; the adhesive layer inside and outside the adhesive ring is made of epoxy resin material; the metal shell is made of stainless steel.

6. An ultrasonic probe for ultrasonic physiotherapy, characterized in that it comprises a non-metallic shell, a piezoelectric wafer, an adhesive ring and an insulating ring, wherein an insulating ring is installed in the top of the non-metallic shell, and the piezoelectric wafer The upper and lower surfaces are provided with metal electrode layers, and the piezoelectric chip is sealed and mounted on the insulating ring through an adhesive ring. The upper surface of the adhesive ring is provided with a conductive layer, and the non-metallic shell on the conductive layer side is provided with a ground Line through holes, the upper surface metal electrode layer of the piezoelectric wafer is in contact with the conductive layer and conducts, while the conductive layer is connected to the ground wire in the ground line through hole, and the lower surface metal electrode layer of the piezoelectric wafer is connected to the positive electrode.

7 . The ultrasonic probe for ultrasonic physiotherapy according to claim 6 , further comprising an acoustic collimator matched with the probe, the acoustic collimator being installed at the end provided with the piezoelectric wafer. 8 .

8 . The ultrasonic probe for ultrasonic physiotherapy according to claim 7 , wherein the inner diameter of the acoustic collimator is consistent with the outer diameter of the probe, and the two are connected and matched with each other in the form of threads. 9 .

9 . The ultrasonic probe for ultrasonic physiotherapy according to claim 6 , wherein the piezoelectric wafer is made of piezoelectric ceramic, single crystal or piezoelectric composite material; the conductive layer is made of solder, conductive glue Or silver foil material; the adhesive layer inside and outside the adhesive ring is made of epoxy resin material; the metal shell is made of stainless steel.