Shock wave generating device

Abstract

The utility model belongs to the technical field of medical equipment, and particularly provides a shock wave generating device which comprises a magnet exciting coil and a composite vibrating diaphragm, the composite vibrating diaphragm comprises a metal eddy current layer and a compression-resistant layer, the metal eddy current layer is attached to the magnet exciting coil, and the metal eddy current layer can be matched with the magnet exciting coil to generate shock waves. The compression-resistant layer covers and is attached to the side, back on to the magnet exciting coil, of the metal eddy current layer. The electrified magnet exciting coil is matched with the metal eddy current layer in the composite vibrating diaphragm, so that the metal eddy current layer vibrates to generate shock waves, and the compression-resistant layer in the composite vibrating diaphragm covers and is attached to one side, back to the magnet exciting coil, of the metal eddy current layer and is used for bearing the pressure brought by the shock waves, so that the metal eddy current layer is protected, and the service life of the composite vibrating diaphragm is prolonged. Excessive deformation of the metal vortex layer caused by strong pressure is effectively avoided, so that the metal vortex layer is not easy to damage, and the overall service life of the composite vibrating diaphragm is prolonged.

Description

Technical Field

[0001] The present application belongs to the technical field of medical equipment, and in particular, relates to a shock wave generating device. Background Art

[0002] Shock wave generators are widely used in the rehabilitation of musculoskeletal diseases and muscle strains because the energy they generate can penetrate the skin and muscle tissue. Shock wave generators generally include an excitation coil and a metal diaphragm. The energized excitation coil cooperates with the metal diaphragm to make the metal diaphragm vibrate and generate shock waves. However, the metal diaphragm needs to withstand strong pressure while generating shock waves, which makes the metal diaphragm easily damaged and has a short service life. Utility Model Content

[0003] The purpose of the present application is to provide a shock wave generating device, aiming to solve the technical problems in the prior art that the metal diaphragm of the shock wave generating device is easily damaged and has a short working life.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in this application is: a shock wave generating device, including an excitation coil and a composite diaphragm, the composite diaphragm includes a metal eddy current layer and a pressure-resistant layer, the metal eddy current layer is bonded to the excitation coil, the metal eddy current layer can cooperate with the excitation coil to generate shock waves, and the pressure-resistant layer covers and is bonded to the side of the metal eddy current layer facing away from the excitation coil.

[0005] Furthermore, a focusing concave surface is formed on a side of the metal eddy current layer facing away from the excitation coil, the pressure-resistant layer is in contact with the focusing concave surface, and the shape of the pressure-resistant layer is the same as that of the focusing concave surface.

[0006] Furthermore, a matching convex surface is formed on the side of the metal eddy current layer facing the excitation coil, the excitation coil is fitted with the matching convex surface, and the shape of the excitation coil is the same as the shape of the matching convex surface.

[0007] Furthermore, the compression-resistant layer is made of carbon fiber material.

[0008] Furthermore, the pressure-resistant layer is made of metal material, and the pressure-resistant layer can also cooperate with the excitation coil to generate shock waves.

[0009] Furthermore, the excitation coil includes an enameled wire, and the enameled wire is flat.

[0010] Furthermore, the shock wave generating device also includes a fixing part, which includes an outer ring part and an inner ring part. The inner ring part is connected to the inner side surface of the outer ring part and cooperates with the outer ring part to form an annular groove. The edge of the composite diaphragm is clamped in the annular groove, and the inner ring part is in contact with the edge of the side of the pressure-resistant layer facing away from the metal eddy current layer.

[0011] Furthermore, the fixing piece is elastic.

[0012] Furthermore, the shock wave generating device also includes a base, which is provided with a mounting groove. The base has a connecting surface arranged around the mounting groove. The excitation coil is arranged in the mounting groove, and the side of the excitation coil facing away from the metal eddy current layer is in contact with the bottom of the mounting groove, and the outer ring part is connected to the connecting surface.

[0013] Furthermore, the excitation coil includes a coil body and an insulating sheet, one side of the insulating sheet is bonded to the metal eddy current layer, and the other side of the insulating sheet is bonded to the coil body. The edge of the insulating sheet extends out of the mounting groove and is fixed between the outer ring portion and the connecting surface.

[0014] Compared with the prior art, the beneficial effect of the shock wave generating device provided by the present application is that: when working, the energized excitation coil cooperates with the metal eddy current layer in the composite diaphragm, causing the metal eddy current layer to vibrate and thus generate a shock wave; the pressure-resistant layer in the composite diaphragm covers and adheres to the side of the metal eddy current layer facing away from the excitation coil, and is used to withstand the pressure brought by the shock wave, thereby protecting the metal eddy current layer and effectively preventing the metal eddy current layer from excessive deformation due to the strong pressure, making the metal eddy current layer less likely to be damaged, thereby extending the overall working life of the composite diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A cross-sectional view of a shock wave generating device provided in an embodiment of the present application;

[0017] Figure 2 for Figure 1 An enlarged view of the shock wave generating device at position A is shown;

[0018] Figure 3 for Figure 1 A partial cross-sectional view of the fixing member of the shock wave generating device shown.

[0019] Among them, the reference numerals in the figure are:

[0020] 10. Excitation coil; 11. Enameled wire; 12. Coil body; 13. Insulation sheet;

[0021] 20. Composite diaphragm; 21. Metal eddy current layer; 211. Focusing concave surface; 212. Matching convex surface; 22. Anti-pressure layer;

[0022] 30. fixing member; 31. outer ring portion; 32. inner ring portion; 33. annular groove;

[0023] 40. base; 41. mounting groove; 42. connection surface;

[0024] 50. Cable fixing nut seat;

[0025] 60. Fixed seat ring; 61. Water inlet hole; 62. Drain hole;

[0026] 70. Water cyst membrane;

[0027] 80. Sealed cavity. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application 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, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Combination Figure 1 and Figure 2As shown, an embodiment of the present application provides a shock wave generating device, including an excitation coil 10 and a composite diaphragm 20, the composite diaphragm 20 includes a metal eddy current layer 21 and a pressure-resistant layer 22, the metal eddy current layer 21 is bonded to the excitation coil 10, the metal eddy current layer 21 can cooperate with the excitation coil 10 to generate shock waves, and the pressure-resistant layer 22 covers and is bonded to the side of the metal eddy current layer 21 facing away from the excitation coil 10.

[0033] During operation, the energized excitation coil 10 cooperates with the metal eddy current layer 21 in the composite diaphragm 20, causing the metal eddy current layer 21 to vibrate and generate a shock wave. The pressure-resistant layer 22 in the composite diaphragm 20 covers and adheres to the side of the metal eddy current layer 21 facing away from the excitation coil 10, and is used to withstand the pressure brought by the shock wave, thereby protecting the metal eddy current layer 21 and effectively preventing the metal eddy current layer 21 from excessive deformation due to the strong pressure, making the metal eddy current layer 21 not easily damaged, thereby extending the overall working life of the composite diaphragm 20.

[0034] The cooperation between the excitation coil 10 and the composite diaphragm 20 is specifically manifested as follows: the energized excitation coil 10 can generate a strong magnetic field change, and the metal eddy current layer 21 attached to the excitation coil 10 is subjected to the force generated by the eddy current induced by the magnetic field change, namely the Lorentz force, which can drive the metal eddy current layer 21 to vibrate and generate shock waves. The magnitude of the Lorentz force is proportional to the eddy current induction intensity, and is related to the induction distance, eddy current size and eddy current area. The direction of the Lorentz force is repulsive force, which is not affected by the direction of the current and generates an outward thrust according to the magnitude of the Lorentz force.

[0035] The metal eddy current layer 21 should be made of a material with low resistivity. Generally, the lower the resistivity of the metal eddy current layer 21, the higher the eddy current induction intensity, the greater the Lorentz force generated, and the stronger the shock wave generated. In addition, the metal eddy current layer 21 should be made of a light material. Generally, the lighter the metal eddy current layer 21, the greater its acceleration when exciting the shock wave. Specifically, the metal eddy current layer 21 can be made of materials such as silver, copper, gold or aluminum.

[0036] The pressure-resistant layer 22 should be made of materials with high mechanical strength. The metal eddy current layer 21 will generate a pressure of more than several to hundreds of MPa in the process of generating shock waves. Only when the mechanical strength of the pressure-resistant layer 22 is high enough can the metal eddy current layer 21 be effectively protected from damage. Exemplarily, the pressure-resistant layer 22 can be made of carbon fiber material. First, the pressure-resistant layer 22 made of carbon fiber material has the characteristics of ultra-high strength, which is stronger than traditional materials such as steel, and can effectively protect the metal eddy current layer 21 from damage; second, the pressure-resistant layer 22 made of carbon fiber material has the characteristics of light weight, which ensures that the metal eddy current layer 21 has a sufficiently large acceleration when exciting shock waves; third, the pressure-resistant layer 22 made of carbon fiber material has the characteristics of good thermal conductivity and good heat dissipation effect, which ensures that the shock wave generating device works normally for a long time.

[0037] The pressure-resistant layer 22 can be made of a metal material with high mechanical strength and eddy current induction characteristics, so that the pressure-resistant layer 22 can not only effectively protect the metal eddy current layer 21 from being damaged, but also cooperate with the excitation coil 10 to generate shock waves, thereby improving the strength of the shock waves generated by the composite diaphragm 20 as a whole. Specifically, the pressure-resistant layer 22 can be made of materials such as 316 stainless steel, 304 stainless steel or titanium alloy.

[0038] In one embodiment, in combination Figure 1 and Figure 2As shown, a focusing concave surface 211 is formed on the side of the metal eddy current layer 21 facing away from the excitation coil 10, and the pressure-resistant layer 22 is fitted with the focusing concave surface 211, and the shape of the pressure-resistant layer 22 is the same as the shape of the focusing concave surface 211. When using shock waves to treat the human body, it is usually necessary to converge the shock waves at one point so that the energy of the shock waves is more concentrated to enhance the therapeutic effect. The metal diaphragm of a traditional shock wave generating device is generally a planar diaphragm, which does not have a focusing function by itself and needs to be used in conjunction with an acoustic lens to achieve a focusing effect. However, this will cause a large loss of shock wave energy and affect the therapeutic effect. In this embodiment, a focusing concave surface 211 is formed on the side of the metal eddy current layer 21 facing away from the excitation coil 10. The shock wave generated by the metal eddy current layer 21 can be automatically focused on one point through the focusing concave surface 211. There is no need to use an acoustic lens, but the shock wave is directly focused, thereby reducing the loss of shock wave energy and enhancing the therapeutic effect of the shock wave. The pressure-resistant layer 22 is designed according to the shape of the focusing concave surface 211, so that the shape of the pressure-resistant layer 22 is the same as that of the focusing concave surface 211. The pressure-resistant layer 22 can completely cover the focusing concave surface 211 and fit tightly with the focusing concave surface 211, which will not affect the focusing effect of the shock wave and can ensure the protection of the metal eddy current layer 21. Specifically, the shape of the focusing concave surface 211 can be an ellipsoid, a spherical surface, a parabola, etc. When the pressure-resistant layer 22 is made of a metal material with eddy current induction characteristics, since the pressure-resistant layer 22 has the same shape as that of the focusing concave surface 211, the pressure-resistant layer 22 can also generate a focused shock wave.

[0039] Benefiting from the focusing effect of shock waves, the shock wave generating device provided in this embodiment is particularly suitable for extracorporeal lithotripsy, and also has a significant analgesic effect on muscle strain. It is particularly good for treating frozen shoulder, wrist strain, knee pain, knee swelling, knee stiffness, etc. It also has a very good therapeutic effect on the rehabilitation of orthopedic diseases, such as nonunion.

[0040] In one embodiment, in combination Figure 1 and Figure 2 As shown, a matching convex surface 212 is formed on the side of the metal eddy current layer 21 facing the excitation coil 10, and the excitation coil 10 is fitted with the matching convex surface 212, and the shape of the excitation coil 10 is the same as the shape of the matching convex surface 212. Since the shape of the excitation coil 10 is the same as the shape of the matching convex surface 212, the excitation coil 10 can be tightly fitted with the matching convex surface 212, thereby improving the coupling efficiency, which is beneficial to improving the intensity of the shock wave.

[0041] In one embodiment, in combination Figure 1 and Figure 2As shown, the excitation coil 10 includes an enameled wire 11, and the enameled wire 11 is flat. The cross-sectional shape of the enameled wire 11 of the conventional excitation coil 10 is generally circular, and the gap between the turns is large, which causes loss in electromagnetic induction coupling and is not conducive to improving the intensity of the shock wave. In this embodiment, the enameled wire 11 is designed to be flat, and its cross-sectional shape is elliptical, which can effectively reduce the gap between the turns, thereby reducing the loss in electromagnetic induction coupling, improving the intensity of the shock wave, and enhancing the therapeutic effect of the shock wave.

[0042] In one embodiment, in combination Figure 1 , Figure 2 and Figure 3 As shown, the shock wave generating device also includes a fixing member 30, and the fixing member 30 includes an outer ring portion 31 and an inner ring portion 32. The inner ring portion 32 is connected to the inner side of the outer ring portion 31, and cooperates with the outer ring portion 31 to form an annular groove 33. The edge of the composite diaphragm 20 is clamped in the annular groove 33, and the inner ring portion 32 is in contact with the edge of the side of the anti-pressure layer 22 facing away from the metal eddy current layer 21. By clamping the edge of the composite diaphragm 20 into the annular groove 33 of the fixing member 30, on the one hand, the outer ring portion 31 can limit the composite diaphragm 20 in the surrounding directions, thereby preventing the composite diaphragm 20 from shifting in the surrounding directions, thereby maintaining the stability of the shock wave focus. On the other hand, the inner ring portion 32 is in contact with the edge of the side of the anti-pressure layer 22 facing away from the metal eddy current layer 21, and the anti-pressure layer 22 can be fixed on the metal eddy current layer 21, ensuring that the anti-pressure layer 22 is tightly in contact with the metal eddy current layer 21, thereby ensuring the protective effect of the anti-pressure layer 22 on the metal eddy current layer 21.

[0043] In one embodiment, the outer ring portion 31 is integrally provided with the inner ring portion 32. The outer ring portion 31 is integrally provided with the inner ring portion 32, and the connection is reliable and not easy to be disengaged, thereby ensuring the fixing effect on the composite diaphragm 20.

[0044] In one embodiment, the fixing member 30 is elastic. The fixing member 30 is made of elastic material, can elastically abut against the composite diaphragm 20 to enhance the fixing effect on the composite diaphragm 20, and can deform to adapt to the vibration of the composite diaphragm 20. Specifically, the fixing member 30 can be made of rubber.

[0045] In one embodiment, in combination Figure 1 and Figure 2As shown, the shock wave generating device also includes a base 40, the base 40 is provided with a mounting groove 41, the base 40 has a connecting surface 42 arranged around the mounting groove 41, the excitation coil 10 is arranged in the mounting groove 41, and the side of the excitation coil 10 facing away from the metal eddy current layer 21 is in contact with the bottom of the mounting groove 41, and the outer ring portion 31 is connected to the connecting surface 42. By opening the mounting groove 41 on the base 40, the excitation coil 10 is arranged in the mounting groove 41, so as to realize the positioning of the excitation coil 10. Since the outer ring portion 31 is fixed on the connecting surface 42 of the base 40, the inner ring portion 32 can cooperate with the bottom of the mounting groove 41, clamp the composite diaphragm 20 and the excitation coil 10 between the inner ring portion 32 and the bottom of the mounting groove 41, realize the fixation of the composite diaphragm 20 and the excitation coil 10, and ensure that the excitation coil 10 and the composite diaphragm 20 are tightly in contact.

[0046] In one embodiment, the base 40 is made of ceramic. The base 40 is made of ceramic, which has good heat dissipation performance on the one hand, ensuring that the shock wave generating device works normally for a long time, and has good insulation performance on the other hand, preventing the operator from getting an electric shock when touching the base 40, thereby ensuring safety.

[0047] In one embodiment, in combination Figure 1 and Figure 2 As shown, the excitation coil 10 includes a coil body 12 and an insulating sheet 13, one side of the insulating sheet 13 is bonded to the metal eddy current layer 21, and the other side of the insulating sheet 13 is bonded to the coil body 12, and the edge of the insulating sheet 13 extends out of the mounting groove 41 and is fixed between the outer ring portion 31 and the connection surface 42. The energized coil body 12 is used to cooperate with the metal eddy current layer 21 so that the metal eddy current layer 21 generates a shock wave, and the insulating sheet 13 is arranged between the metal eddy current layer 21 and the coil body 12, which can avoid the short circuit between the metal eddy current layer 21 and the coil body 12 and cause damage to the shock wave generating device, and the insulating sheet 13 is in a sheet shape, which can minimize the distance between the metal eddy current layer 21 and the coil body 12 to improve the coupling efficiency, thereby improving the strength of the shock wave, and the edge of the insulating sheet 13 extends out of the mounting groove 41 and is fixed between the outer ring portion 31 and the connection surface 42, thereby achieving the fixation of the insulating sheet 13. During the manufacturing process, epoxy resin is poured between the insulating sheet 13 and the base 40 to encapsulate and fix the coil body 12 in the mounting groove 41 , and low vacuum degassing treatment is required during the encapsulation process.

[0048] In one embodiment, the insulating sheet 13 is made of polyimide. The insulating sheet 13 is made of polyimide, which has good insulation, high temperature resistance and mechanical strength.

[0049] In one embodiment, Figure 1As shown, a cable fixing nut seat 50 is provided on one side of the base 40 facing away from the mounting groove 41. The cable fixing nut seat 50 is used to fix the power cable. The external power cable passes through the base 40 and is connected to the excitation coil 10 in the mounting groove 41 to supply power to the excitation coil 10. Specifically, the external power cable is connected to the coil body 12 in the excitation coil 10 to supply power to the coil body 12.

[0050] In one embodiment, Figure 1 As shown, the shock wave generating device also includes a fixed seat ring 60 and a water bag membrane 70. The fixed seat ring 60 is fixed on the base 40. The outer ring portion 31 of the fixing member 30 is located between the connecting surface 42 of the fixed seat ring 60 and the base 40. The water bag membrane 70 is arranged on the base 40. The water bag membrane 70, the fixed seat ring 60 and the composite diaphragm 20 cooperate to form a sealed cavity 80. The fixed seat ring 60 cooperates with the connecting surface 42 of the base 40 to clamp the outer ring portion 31 of the fixing member 30, so that the outer ring portion 31 is fixed on the connecting surface 42. When working, liquid is injected into the sealed cavity 80, the excitation coil 10 is energized, and the excitation coil 10 cooperates with the composite diaphragm 20 to make the composite diaphragm 20 vibrate to generate shock waves. The shock waves propagate forward through the liquid in the sealed cavity 80, and finally gather energy at the focus.

[0051] In one embodiment, the fixed seat ring 60 is made of aluminum. The fixed seat ring 60 is made of aluminum, which has good thermal conductivity and can quickly dissipate the heat of the liquid in the sealed cavity 80 to the outside, ensuring that the shock wave generating device works normally for a long time.

[0052] In one embodiment, Figure 1 As shown, the fixed seat ring 60 is provided with a water inlet hole 61 and a drain hole 62, and both the water inlet hole 61 and the drain hole 62 are connected to the sealed cavity 80. During operation, external liquid flows into the sealed cavity 80 from the water inlet hole 61 and then is discharged from the drain hole 62, thereby forming a circulating flow.

[0053] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A shock wave generating device, characterized in that: It includes an excitation coil and a composite diaphragm, wherein the composite diaphragm includes a metal eddy current layer and a pressure-resistant layer, wherein the metal eddy current layer is bonded to the excitation coil, the metal eddy current layer can cooperate with the excitation coil to generate shock waves, and the pressure-resistant layer covers and is bonded to the side of the metal eddy current layer facing away from the excitation coil.

2. The shock wave generating device according to claim 1, characterized in that: A focusing concave surface is formed on a side of the metal eddy current layer facing away from the excitation coil, the anti-pressure layer is in contact with the focusing concave surface, and the shape of the anti-pressure layer is the same as that of the focusing concave surface.

3. The shock wave generating device according to claim 2, characterized in that: A matching convex surface is formed on the side of the metal eddy current layer facing the excitation coil, the excitation coil is in contact with the matching convex surface, and the shape of the excitation coil is the same as that of the matching convex surface.

4. The shock wave generating device according to claim 1, characterized in that: The pressure-resistant layer is made of carbon fiber material.

5. The shock wave generating device according to claim 1, characterized in that: The pressure-resistant layer is made of metal material and can also cooperate with the excitation coil to generate shock waves.

6. The shock wave generating device according to claim 1, characterized in that: The excitation coil comprises an enameled wire, and the enameled wire is flat.

7. The shock wave generating device according to claim 1, characterized in that: The shock wave generating device also includes a fixing part, which includes an outer ring part and an inner ring part. The inner ring part is connected to the inner side surface of the outer ring part and cooperates with the outer ring part to form an annular groove. The edge of the composite diaphragm is clamped in the annular groove, and the inner ring part is in contact with the edge of the side of the pressure-resistant layer facing away from the metal eddy current layer.

8. The shock wave generating device according to claim 7, characterized in that: The fixing piece is elastic.

9. The shock wave generating device according to claim 7, characterized in that: The shock wave generating device also includes a base, the base is provided with a mounting groove, the base has a connecting surface arranged around the mounting groove, the excitation coil is arranged in the mounting groove, and the side of the excitation coil facing away from the metal eddy current layer is in contact with the bottom of the mounting groove, and the outer ring portion is connected to the connecting surface.

10. The shock wave generating device according to claim 9, characterized in that: The excitation coil includes a coil body and an insulating sheet, one side of the insulating sheet is bonded to the metal eddy current layer, and the other side of the insulating sheet is bonded to the coil body. The edge of the insulating sheet extends out of the mounting groove and is fixed between the outer ring portion and the connecting surface.

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