Fixing structure, ultrasonic transduction unit and array type focused ultrasonic transducer

Abstract

The utility model discloses a fixing structure, ultrasonic transduction unit and array type focused ultrasound transducer, wherein the fixing structure comprises a first shell and a second shell, the bottom of the second shell is provided with a fixing groove used for installing an ultrasonic transduction element, the first shell is internally provided with an installing cavity, and the installing cavity is provided with a fixing groove used for installing the ultrasonic transduction element. And the second shell is arranged in the mounting cavity. Through the structural design, on one hand, the ultrasonic transduction element can be conveniently fixed in the fixing structure, the problem that the ultrasonic transduction element is difficult to fix is solved, and the assembling convenience of the ultrasonic transduction unit is improved; and on the other hand, the arrangement of the fixing structure is reasonable, the size of the ultrasonic transduction unit can be reduced, and then the size of the array type focused ultrasonic transducer is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a fixing structure, an ultrasonic transducer unit and an array-type focused ultrasonic transducer. Background Art

[0002] A number of ultrasonic transducer units need to be installed on the array focused ultrasonic transducer to generate the required ultrasonic energy at the target focus, and the core component of the ultrasonic transducer unit is the ultrasonic transducer element.

[0003] The existing fixing structure of ultrasonic transducer elements has the following problems: 1. The ultrasonic transducer element is difficult to fix in the fixing structure; 2. The unreasonable fixing structure leads to a large volume of the ultrasonic transducer unit, which in turn leads to a large volume of the array focused ultrasonic transducer. Utility Model Content

[0004] The purpose of the utility model is to provide a fixing structure, an ultrasonic transducer unit and an array-type focused ultrasonic transducer to solve the technical problems in the prior art that ultrasonic transducer elements are difficult to fix and the ultrasonic transducer unit is large in size.

[0005] The utility model provides a fixing structure, comprising a first shell and a second shell, wherein a fixing groove for installing an ultrasonic transducer element is provided at the bottom of the second shell, an installation cavity is provided inside the first shell, and the second shell is arranged in the installation cavity.

[0006] As described above, in the fixing structure, the second shell includes a base, the fixing groove is arranged at the bottom of the base, and the base is used to connect the electrical connector so that the electrical connector is electrically connected to the ultrasonic transducer element; a channel is opened at the top of the first shell, and the channel is connected to the installation cavity, and the channel is used for the top of the electrical connector to extend into.

[0007] In the fixing structure as described above, the base is provided with a first boss, the first boss is provided with a through slot, the through slot is connected to the fixing slot, the first boss is used to abut the electrical connector, and the through slot is used for the electrode of the electrical connector to pass through.

[0008] In the fixing structure as described above, a notch is provided on the outer side wall of the base, and the notch is used for allowing the electrode of the electrical connector to pass through.

[0009] As described above in the fixing structure, the first shell includes an outer shell, a fixing seat and a sealing layer, the sealing layer covers the bottom of the outer shell, the outer shell, the fixing seat and the sealing layer are connected to form the installation cavity, and the sealing layer is in contact with the ultrasonic transducer element.

[0010] In the fixing structure as described above, the fixing seat is provided with a second boss extending downward, and the top of the shell is sleeved on the second boss.

[0011] As described above, the fixing structure, the fixing seat includes a fixing seat body and a connecting rod extending upward, the connecting rod is connected to the top of the fixing seat body, the second boss is arranged at the bottom of the fixing seat body, and the channel passes through the connecting rod, the fixing seat body and the second boss in sequence.

[0012] In the fixing structure as described above, the inner wall of the shell and the outer wall of the base are interference fit.

[0013] In the fixing structure as described above, a first annular groove is formed on the second boss, and a first sealing ring is disposed in the first annular groove.

[0014] In the fixing structure as described above, a second annular groove is formed on the connecting rod, and a second sealing ring is arranged in the second annular groove.

[0015] The utility model provides an ultrasonic transducer unit, comprising an electrical connector, an ultrasonic transducer element and the fixing structure as described above, wherein the ultrasonic transducer element is arranged in the fixing groove; the electrical connector contacts the second shell and is electrically connected to the ultrasonic transducer element; the electrical connector and the ultrasonic transducer element are arranged in the installation cavity.

[0016] In the ultrasonic transducer unit as described above, the ultrasonic transducer element is a piezoelectric ceramic.

[0017] In the ultrasonic transducer unit as described above, the electrical connector is provided with a positive electrode spring pin and a negative electrode wire extending downward, and the positive electrode spring pin and the negative electrode wire pass through the second shell and are electrically connected to the ultrasonic transducer element.

[0018] In the ultrasonic transducer unit as described above, the sealing layer of the fixed structure also serves as a matching layer for the ultrasonic transducer element.

[0019] The utility model also provides an array-type focused ultrasonic transducer, comprising a top shell, a bottom shell and a plurality of ultrasonic transducer units as described above, wherein the top shell is connected to the bottom shell, a plurality of through holes are provided on the bottom shell, and the ultrasonic transducer units are passed through the through holes and connected to the bottom shell.

[0020] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0021] In the present invention, a fixing groove is provided at the bottom of the second shell, and the ultrasonic transducer element is installed in the fixing groove, so that the ultrasonic transducer element can be fixed on the second shell, and the second shell is installed in the first shell, thereby realizing the fixing of the ultrasonic transducer element in the first shell. Through the structural design of the present invention, on the one hand, it is convenient to fix the ultrasonic transducer element in the fixed structure, solve the problem that the ultrasonic transducer element is difficult to fix, and improve the convenience of assembling the ultrasonic transducer unit; on the other hand, the setting of the fixed structure is reasonable, which can reduce the volume of the ultrasonic transducer unit, and then reduce the volume of the array-type focused ultrasonic transducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] in:

[0024] Figure 1 is a schematic structural diagram of an ultrasonic transducer unit according to an exemplary embodiment;

[0025] Figure 2 is an exploded view of an ultrasonic transducer unit according to an exemplary embodiment;

[0026] Figure 3 is a schematic diagram of a connection structure of a second housing, an electrical connector and an ultrasonic transducer element according to an exemplary embodiment;

[0027] Figure 4 is a schematic structural diagram of an array-type focused ultrasonic transducer according to an exemplary embodiment.

[0028] Among them: 1. second shell; 11. base; 111. fixing groove; 112. notch; 113. first boss; 12. electrical connector; 121. positive electrode spring pin; 122. negative electrode wire; 2. ultrasonic transducer element; 3. outer shell; 4. fixing seat; 41. fixing seat body; 42. connecting rod; 421. second annular groove; 422. second sealing ring; 43. second boss; 431. first annular groove; 432. first sealing ring; 5. sealing layer; 6. bottom shell; 61. through hole; 7. top shell. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0031] 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] See also Figure 1-Figure 3 The utility model discloses a fixing structure, including a first shell and a second shell 1, wherein a fixing groove 111 for installing an ultrasonic transducer element 2 is provided at the bottom of the second shell 1, and an installation cavity is provided inside the first shell, and the second shell 1 is arranged in the installation cavity. Specifically, the second shell 1 is engaged in the installation cavity, and the ultrasonic transducer element 2 is installed in the fixing groove 111, so that the ultrasonic transducer element 2 can be fixed on the second shell 1, and then the second shell 1 is installed in the first shell, so that the ultrasonic transducer element 2 is fixed in the first shell, which is convenient for the assembly of the ultrasonic transducer element 2, improves the convenience of assembling the ultrasonic transducer unit, and solves the problem that the ultrasonic transducer element 2 is difficult to fix.

[0033] With respect to the present application, other solutions may be as follows: the ultrasonic transducer unit includes a first shell, the first shell includes a matching layer arranged at the bottom, and the ultrasonic transducer element 2 is arranged in the first shell through the matching layer. However, the matching layer is generally connected and fixed with the external thread of the first shell by setting an internal thread. Since the internal thread needs to be set inside the matching layer, the thickness of the matching layer periphery will be increased, resulting in a larger bottom surface area of ​​the matching layer, which in turn leads to a larger volume of the arrayed focused ultrasonic transducer, and the ultrasonic transducer element 2 is not convenient to be fixed inside the matching layer.

[0034] Furthermore, the second shell 1 includes a base 11, the fixing groove 111 is arranged at the bottom of the base 11, the base 11 is used to connect the electrical connector 12 so that the electrical connector 12 is electrically connected to the ultrasonic transducer element 2, and a channel is opened on the top of the first shell, the channel is connected to the installation cavity, and the channel is used for the top of the electrical connector 12 to extend into, and the top of the electrical connector 12 can be electrically connected to the main control board of the ultrasonic transducer through a wire to drive the ultrasonic transducer element 2 to vibrate and generate ultrasonic waves.

[0035] Furthermore, a first boss 113 is provided on the base 11, and a through groove is formed on the first boss 113, and the through groove is communicated with the fixing groove 111, and the first boss 113 is used to abut the electrical connector 12, and the electrical connector 12 can pass through the through groove to connect with the ultrasonic transducer element 2, thereby realizing the electrical connection of the ultrasonic transducer element 2.

[0036] Furthermore, a notch 112 is provided on the outer wall of the base 11 , and the notch 112 is used for the electrode wire of the electrical connector 12 to pass through. The electrode wire of the electrical connector 12 is connected to the ultrasonic transducer element 2 along the notch 112 , thereby achieving electrical connection of the ultrasonic transducer element 2 .

[0037] Further, the first shell includes an outer shell 3, a fixing seat 4 and a sealing layer 5, the sealing layer 5 covers the bottom of the outer shell 3, the outer shell 3, the fixing seat 4 and the sealing layer 5 are connected to form the installation cavity, and the sealing layer 5 is in contact with the ultrasonic transducer element 2. Specifically, the sealing layer 5 is a sealant, which is bonded to the inner wall of the outer shell 3 and the bottom wall of the ultrasonic transducer element 2, and can seal the bottom of the installation cavity to prevent water from entering the installation cavity from the gap between the sealing layer 5 and the outer shell 3 to affect the performance of the ultrasonic transducer element 2, and can also protect the ultrasonic transducer element 2, prevent the welding point of the electrode wire from being exposed to the outside, and can further fix the ultrasonic transducer element 2.

[0038] Furthermore, the fixing seat 4 is provided with a second boss 43 extending downward, the upper end of the shell 3 is sleeved on the second boss 43 , and the second boss 43 is engaged with the inner wall of the shell 3 .

[0039] Furthermore, the fixing seat 4 includes a fixing seat body 41 and a connecting rod 42 extending upward, the connecting rod 42 is connected to the top of the fixing seat body 41, the second boss 43 is arranged at the bottom of the fixing seat body 41, the channel passes through the connecting rod 42, the fixing seat body 41 and the second boss 43 in sequence, the channel passes through the middle part of the entire fixing seat 4, so as to facilitate the connection between the electrical connector 12 and the external main control board, and the connecting rod 42 is provided with a thread to facilitate the fixing of the ultrasonic transducer unit to the ultrasonic transducer.

[0040] Furthermore, the inner wall of the housing 3 and the outer wall of the base 11 are interference-fitted, which is a detachable connection mode, and the base 11 is pressed into the housing 3 by external force.

[0041] Further, the shell 3 is connected to the fixing seat 4 by snapping, bonding, welding or threading. Specifically, when the shell 3 and the fixing seat 4 are connected by snapping, the outer wall of the second boss 43 is interference fit with the inner wall of the shell 3 to fix the shell 3 and the fixing seat 4; when the shell 3 and the fixing seat 4 are connected by adhesive connection, the outer wall of the second boss 43 is bonded with the inner wall of the shell 3 to fix the shell 3 and the fixing seat 4; when the shell 3 and the fixing seat 4 are connected by welding, the fixing seat body 41 is welded to the top of the shell 3, so as to fix the shell 3 and the fixing seat 4; when the shell 3 and the fixing seat 4 are connected by threading, the outer wall of the second boss 43 is provided with an external thread, and the upper end of the inner wall of the shell 3 is provided with an internal thread, which is spirally connected to fix the shell 3 and the fixing seat 4.

[0042] Furthermore, a first annular groove 431 is formed on the second boss 43 , a first sealing ring 432 is disposed in the first annular groove 431 , and the first sealing ring 432 presses the inner wall of the housing 3 to prevent water from entering the interior of the housing 3 from the top of the housing 3 .

[0043] In another embodiment, see Figure 1-3The utility model also discloses an ultrasonic transducer unit, including an electrical connector 12, an ultrasonic transducer element 2 and the fixing structure as described above, wherein the ultrasonic transducer element 2 is arranged in a fixing groove 111 of the second shell 1; the electrical connector 12 contacts the second shell 1 and is electrically connected to the ultrasonic transducer element 2; the electrical connector 12, the ultrasonic transducer element 2 and the second shell 1 are all arranged in the mounting cavity of the first shell. Specifically, the ultrasonic transducer element 2 is fixed in the first shell through the second shell 1, and the sealing layer 5 is bonded to the inner wall of the shell 3 and the bottom wall of the ultrasonic transducer element 2 to fix the ultrasonic transducer element 2, thereby improving the convenience of assembling the ultrasonic transducer unit, and the setting of the sealing layer 5 will not cause extrusion to the ultrasonic transducer element 2, thereby preventing the ultrasonic transducer element 2 from being extruded and deformed to affect the performance.

[0044] Furthermore, the ultrasonic transducer element 2 is a piezoelectric ceramic that can vibrate to generate ultrasonic waves.

[0045] Furthermore, the electrical connector is provided with a positive spring pin and a negative wire extending downward, and the positive spring pin and the negative wire pass through the second shell and are electrically connected to the ultrasonic transducer element. Specifically, the top of the ultrasonic transducer element 2 is the positive pole, and the bottom of the ultrasonic transducer element 2 is the negative pole. The positive spring pin 121 passes through the through slot and directly abuts against the top of the ultrasonic transducer element 2. The negative wire 122 passes through the notch 112 and is connected to the bottom of the ultrasonic transducer element 2. The negative wire 122 can be welded to the bottom of the piezoelectric ceramic, wherein the positive spring pin 121 can be elastically retracted so that it can better contact the top of the ultrasonic transducer element 2 to achieve a better contact effect.

[0046] Furthermore, the sealing layer 5 of the fixed structure also serves as a matching layer of the ultrasonic transducer element, and has a thickness of 1-2 mm, so that the acoustic impedance between the ultrasonic transducer element vibrator and the load is matched, thereby improving the energy transmission efficiency.

[0047] In another embodiment, see Figure 4 The utility model also discloses an array-type focused ultrasonic transducer, comprising a top shell 7, a bottom shell 6, and a plurality of ultrasonic transducer units as described above, wherein the top shell 7 is connected to the bottom shell 6, and the bottom shell 6 is provided with a plurality of through holes 61, and the ultrasonic transducer units are passed through the through holes 61 and connected to the bottom shell 6. The connecting rod 42 of the ultrasonic transducer unit passes through the through holes 61 and is connected to a nut to fix the ultrasonic transducer unit.

[0048] Furthermore, a second annular groove 421 is formed on the connecting rod 42, and a second sealing ring 422 is arranged in the second annular groove 421. The second sealing ring 422 squeezes the hole wall of the through hole 61 to prevent water from entering the cavity formed by the connection between the top shell 7 and the bottom shell 6 through the gap between the connecting rod 42 and the hole wall of the through hole 61.

[0049] On the one hand, the ultrasonic transducer element 2 is directly fixed in the fixing groove 111, which improves the convenience of installing and fixing the ultrasonic transducer element 2, and solves the problem that the ultrasonic transducer element 2 is difficult to fix; on the other hand, the connection between the housing 3 and the sealing layer 5 of this solution is that the sealing layer 5 is directly bonded to the inner wall of the housing 3 and the bottom wall of the ultrasonic transducer element 2, and there is no need to increase the bottom area of ​​the sealing layer 5, which can reduce the volume of the ultrasonic transducer unit, thereby reducing the volume of the array-type focused ultrasonic transducer. In addition, the setting of the sealing layer 5 will not cause extrusion to the ultrasonic transducer element 2, and prevent the ultrasonic transducer element 2 from being squeezed and deformed to affect the performance.

[0050] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A fixing structure, characterized in that: It comprises a first shell and a second shell, wherein a fixing groove for installing an ultrasonic transducer element is provided at the bottom of the second shell, an installation cavity is provided inside the first shell, and the second shell is arranged in the installation cavity.

2. The fixing structure according to claim 1, characterized in that: The second shell includes a base, the fixing groove is arranged at the bottom of the base, and the base is used to connect the electrical connector so that the electrical connector is electrically connected to the ultrasonic transducer element; a channel is opened at the top of the first shell, and the channel is connected to the installation cavity, and the channel is used for the top of the electrical connector to extend into.

3. The fixing structure according to claim 2, characterized in that: The base is provided with a first boss, the first boss is provided with a through slot, the through slot is communicated with the fixing slot, the first boss is used to abut against the electrical connector, and the through slot is used for an electrode of the electrical connector to pass through.

4. The fixing structure according to claim 3, characterized in that: A notch is provided on the outer side wall of the base, and the notch is used for allowing the electrode of the electrical connector to pass through.

5. The fixing structure according to claim 2, characterized in that: The first shell includes an outer shell, a fixing seat and a sealing layer. The sealing layer covers the bottom of the outer shell. The outer shell, the fixing seat and the sealing layer are connected to form the installation cavity. The sealing layer is used to contact the ultrasonic transducer element.

6. The fixing structure according to claim 5, characterized in that: The fixing seat is provided with a second boss extending downward, and the top of the shell is sleeved on the second boss.

7. The fixing structure according to claim 6, characterized in that: The fixing seat includes a fixing seat body and a connecting rod extending upward, the connecting rod is connected to the top of the fixing seat body, the second boss is arranged at the bottom of the fixing seat body, and the channel passes through the connecting rod, the fixing seat body and the second boss in sequence.

8. The fixing structure according to claim 5, characterized in that: The inner wall of the shell is interference-fitted with the outer wall of the base.

9. The fixing structure according to claim 6, characterized in that: A first annular groove is formed on the second boss, and a first sealing ring is disposed in the first annular groove.

10. The fixing structure according to claim 7, characterized in that: A second annular groove is formed on the connecting rod, and a second sealing ring is arranged in the second annular groove.

11. An ultrasonic transducer unit, characterized in that: It includes an electrical connector, an ultrasonic transducer element and a fixing structure as described in any one of claims 1 to 10, wherein the ultrasonic transducer element is arranged in the fixing groove; the electrical connector is in contact with the second shell and is electrically connected to the ultrasonic transducer element; the electrical connector and the ultrasonic transducer element are both arranged in the mounting cavity.

12. The ultrasonic transducer unit according to claim 11, characterized in that: The ultrasonic transducer element is piezoelectric ceramic.

13. The ultrasonic transducer unit according to claim 11, characterized in that: The electrical connector is provided with a positive electrode spring pin and a negative electrode wire extending downward, and the positive electrode spring pin and the negative electrode wire pass through the second shell and are electrically connected to the ultrasonic transducer element.

14. The ultrasonic transducer unit according to claim 11, characterized in that: The sealing layer of the fixed structure also serves as a matching layer for the ultrasonic transducer element.

15. An array focused ultrasonic transducer, characterized in that: It comprises a top shell, a bottom shell and several ultrasonic transducer units as described in any one of claims 11-14, the top shell is connected to the bottom shell, the bottom shell is provided with several through holes, the ultrasonic transducer units are passed through the through holes and connected to the bottom shell.

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