Intracavity probe

Abstract

An intracavity probe comprises a handle, a detection tube, a sound head assembly, a conductive shielding assembly and a driving assembly, the sound head assembly comprises a lens layer, a matching layer, a piezoelectric layer and a backing layer which are stacked in sequence, the conductive shielding assembly comprises a first conductive shielding piece and a second conductive shielding piece, and the driving assembly comprises a driving piece and a hollow shaft. The hollow shaft is provided with the concave mounting part, the sound head assembly is arranged in the mounting part of the hollow shaft, the sound head assembly is further connected with the first conductive shielding piece and the second conductive shielding piece, and the first conductive shielding piece, the second conductive shielding piece and the hollow shaft at least surround the piezoelectric layer to form electromagnetic shielding on the piezoelectric layer; wherein the hollow shaft is used as a part of the shielding structure, so that materials of a shielding piece can be saved, and the weight is reduced; the sound head assembly is hidden in the hollow shaft, so that the structure is more compact, and the use requirement of small volume in the cavity can be better met; moreover, the sound head assembly is connected with the hollow shaft through the second conductive shielding member, so that the installation stability of the sound head assembly can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical detection, in particular to an intracavity probe. Background Art

[0002] Medical ultrasound transducers are susceptible to interference from strong electromagnetic fields during use, resulting in unclear ultrasound images. To obtain more images and facilitate imaging, medical ultrasound transducers are often configured with a rotatable structure, such as a 4D probe. Doctors can manually control the movement of the transducer in the X, Y, and Z axes, and the transducer can also rotate automatically.

[0003] Regarding the shielding design of movable medical ultrasonic transducers, a common method is to add metal materials to the outside of the acoustic head assembly (3). When using metal sheet metal parts as the acoustic head shielding layer, due to problems such as the processability and weight of the sheet metal parts, the acoustic head structure will be bulky, and the portability and operability will be extremely low. This is especially true for intracavitary probes. The space inside the probe is limited, and the bulky and heavy shielding structure will greatly affect the user experience. Utility Model Content

[0004] The utility model provides an intracavity probe for solving the problem that the shielding structure of metal sheet metal is bulky and heavy and affects the user experience.

[0005] In one embodiment, an intracavity probe is provided, comprising:

[0006] handle;

[0007] The detection tube has a first end and a second end that are relatively far apart, the first end is used for inserting into the cavity for detection, and the second end is connected to the handle;

[0008] The acoustic head assembly includes a lens layer, a matching layer, a piezoelectric layer, and a backing layer stacked in sequence. The surface of the lens layer facing away from the matching layer is a detection surface, and the surface of the backing layer facing away from the piezoelectric layer is a mounting surface. The detection surface faces the outside of the detection tube and is used to transmit ultrasonic waves and receive ultrasonic echoes. The lens layer, the matching layer, the piezoelectric layer, and the backing layer are stacked to form a first side surface, a second side surface, a third side surface, and a fourth side surface connected end to end.

[0009] a conductive shielding assembly, comprising a first conductive shielding member and a second conductive shielding member, wherein the first conductive shielding member is provided on both sides of the acoustic head assembly, the first conductive shielding member at least shields the piezoelectric layer on the first side surface and at least shields the piezoelectric layer on the third side surface, the first conductive shielding member is electrically connected to the piezoelectric layer and the second conductive shielding member, and the second conductive shielding member is fixed to the mounting surface of the acoustic head assembly; and

[0010] A driving assembly comprising a driving member and a hollow shaft, wherein the driving member is arranged in the handle, the hollow shaft is arranged in the detection tube, the hollow shaft is provided with a concave mounting portion, and the mounting portion has a first side wall and a second side wall facing each other; the hollow shaft has a conductive shielding property, and the second conductive shielding member is fixedly connected and electrically connected to the hollow shaft; the acoustic head assembly is arranged in the mounting portion, the first side wall at least shields the piezoelectric layer in the second side surface, and the second side wall at least shields the piezoelectric layer in the fourth side surface; the driving member is connected to the hollow shaft or the acoustic head assembly, and the driving member is used to drive the acoustic head assembly to rotate or swing;

[0011] The first conductive shielding component, the second conductive shielding component and the hollow shaft at least surround the piezoelectric layer to form an electromagnetic shield for the piezoelectric layer.

[0012] In one embodiment, the mounting portion is located on a circumferential side surface of the hollow shaft, one end of the hollow shaft extends into the handle and is connected to the driving member, and the driving member is used to drive the acoustic head assembly to rotate.

[0013] In one embodiment, the mounting portion is located at an axial end of the hollow shaft, the driving member is connected to the acoustic head assembly via a pull rope, the pull rope is passed through the hollow shaft, and the driving member is used to drive the acoustic head assembly to swing.

[0014] In one embodiment, part or all of the lens layer is exposed from the mounting portion.

[0015] In one embodiment, the first conductive shielding member is attached to the first side surface and the third side surface.

[0016] In one embodiment, the first conductive shielding component is a metal film.

[0017] In one embodiment, the second conductive shielding component covers and shields the mounting surface.

[0018] In one embodiment, the second conductive shielding member is a metal block, or an electromagnetic shielding layer is provided on the surface of the second conductive shielding member.

[0019] In one embodiment, the first side wall is close to or abuts the second side wall, and / or the second side wall is close to or abuts the fourth side wall.

[0020] In one embodiment, the hollow shaft is a metal rotating shaft; or, the first side wall and the second side wall of the hollow shaft are provided with an electromagnetic shielding layer.

[0021] In one embodiment, the mounting portion is a mounting groove, and both sides of the mounting groove have side openings, and the first side surface and the third side surface are respectively aligned with the side openings of the mounting portion.

[0022] In one embodiment, a control board is further included, which is arranged in the handle. The piezoelectric layer is electrically connected to the control board through a flexible circuit board. The piezoelectric layer is also electrically connected to the control board through the first conductive shielding component, the second conductive shielding component, the hollow shaft and the cable.

[0023] In one embodiment, an intracavity probe is provided, comprising:

[0024] handle;

[0025] The detection tube has a first end and a second end that are relatively far apart, the first end is used for inserting into the cavity for detection, and the second end is connected to the handle;

[0026] The acoustic head assembly includes a lens layer, a matching layer, a piezoelectric layer, and a backing layer stacked in sequence. The surface of the lens layer facing away from the matching layer is a detection surface, and the surface of the backing layer facing away from the piezoelectric layer is a mounting surface. The detection surface faces the outside of the detection tube and is used to transmit ultrasonic waves and receive ultrasonic echoes. The lens layer, the matching layer, the piezoelectric layer, and the backing layer are stacked to form a first side surface, a second side surface, a third side surface, and a fourth side surface connected end to end.

[0027] a first conductive shielding member disposed on both sides of the acoustic head assembly, the first conductive shielding member shielding at least the piezoelectric layer on the first side surface and at least the piezoelectric layer on the third side surface, the first conductive shielding member being connected to the acoustic head assembly; and

[0028] A driving assembly comprising a driving member and a hollow shaft, wherein the driving member is arranged in the handle, the hollow shaft is arranged in the detection tube, the hollow shaft is provided with a concave mounting portion, and the mounting portion has a first side wall and a second side wall facing each other; the hollow shaft has a conductive shielding property, and the first conductive shielding member is electrically connected to the hollow shaft; the acoustic head assembly is arranged in the mounting portion, the first side wall at least shields the piezoelectric layer in the second side surface, and the second side wall at least shields the piezoelectric layer in the fourth side surface; the driving member is connected to the hollow shaft or the acoustic head assembly, and the driving member is used to drive the acoustic head assembly to rotate or swing;

[0029] The first conductive shielding component and the hollow shaft at least surround the piezoelectric layer to form an electromagnetic shield for the piezoelectric layer.

[0030] In one embodiment, the first conductive shielding member includes two pieces of metal film, one piece of the metal film covers the piezoelectric layer on the first side and extends to be electrically connected to the hollow shaft, and the other piece of the metal film covers the piezoelectric layer on the third side and extends to be electrically connected to the hollow shaft.

[0031] In one embodiment, the mounting portion is located on a circumferential side surface of the hollow shaft, one end of the hollow shaft extends into the handle and is connected to the driving member, and the driving member is used to drive the acoustic head assembly to rotate.

[0032] In one embodiment, a control board is further included, which is arranged in the handle. The piezoelectric layer is electrically connected to the control board through a flexible circuit board. The piezoelectric layer is also electrically connected to the control board through the first conductive shielding component, the hollow shaft and the cable.

[0033] According to the intracavity probe of the above embodiment, since the hollow shaft is provided with a concave mounting portion, the acoustic head assembly is arranged in the mounting portion of the hollow shaft, and the acoustic head assembly is also connected to a first conductive shielding member and a second conductive shielding member. The first conductive shielding member, the second conductive shielding member and the hollow shaft at least surround the piezoelectric layer to form an electromagnetic shielding for the piezoelectric layer; wherein, the hollow shaft as part of the shielding structure can save the material of the shielding member, simplify the shielding structure, and reduce the weight; the acoustic head assembly is hidden in the hollow shaft, making the structure more compact and better able to meet the use requirements of small volume in the cavity; and, the acoustic head assembly is also connected to the hollow shaft through the second conductive shielding member, which can improve the stability of the installation of the acoustic head assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of an intracavity probe in one embodiment;

[0035] Figure 2 A schematic structural diagram of an acoustic head assembly in one embodiment;

[0036] Figure 3 This is a schematic structural diagram of a hollow shaft in one embodiment;

[0037] Figure 4 A side view of an acoustic head assembly and a hollow shaft in one embodiment;

[0038] Figure 5 A radial cross-sectional view of an acoustic head assembly and a hollow shaft in one embodiment;

[0039] Figure 6 A schematic structural diagram of a driving assembly in one embodiment;

[0040] Figure 7 A radial cross-sectional view of an acoustic head assembly and a hollow shaft in one embodiment;

[0041] The accompanying drawings are numerals as follows:

[0042] 1-handle;

[0043] 2-Detection tube;

[0044] 3-acoustic head assembly, 31-lens layer, 32-matching layer, 33-piezoelectric layer, 34-backing layer, 3a-detection surface, 3b-mounting surface, 3c-first side surface, 3d-second side surface, 3e-third side surface, 3f-fourth side surface;

[0045] 4-shielding assembly, 41-first conductive shielding member, 42-second conductive shielding member;

[0046] 5-driving assembly, 51-driving member, 52-hollow shaft, 521-mounting portion, 5211-first side wall, 5212-second side wall, 53-gear set. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted under different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0048] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0049] The serial numbers assigned to components herein, such as "first" and "second," are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). The front end herein refers to the end inserted into or proximal to the cavity, the rear end refers to the end distal to the cavity, the upper end refers to the end of the acoustic head assembly emitting ultrasonic waves, and the lower end refers to the end of the acoustic head assembly with the backing layer.

[0050] In one embodiment, an intracavity probe is provided. This intracavity probe is an intracavity ultrasound probe, which is inserted into a human or animal cavity to perform ultrasound imaging and detect lesions in the subject. This intracavity probe has advantages such as a small size and a rotatable acoustic head within the probe, meeting the needs of most scenarios.

[0051] The intracavity probe of this embodiment installs the acoustic head assembly of the intracavity probe on a hollow shaft in an embedded manner. The hollow shaft wraps around part of the acoustic head assembly. The hollow shaft is a metal electromagnetic shielding structure. The hollow shaft can replace part of the shielding structure around the acoustic head assembly, thereby reducing the amount of shielding structure around the acoustic head assembly, and further reducing the spatial structure and weight of the shielding structure, that is, reducing the space occupied by the shielding structure, thereby realizing the miniaturization and lightweight of the intracavity probe.

[0052] Please refer to Figures 1 to 6 The intracavity probe of this embodiment mainly includes a handle 1, a detection tube 2, an acoustic head assembly 3, a conductive shielding assembly 4 and a driving assembly 5.

[0053] The handle 1 has a cavity inside, and components such as a control board can be installed in the cavity of the handle 1. The handle 1 has a front end and a rear end, and the rear end of the handle 1 can be connected to the host through a cable to achieve charging and signal transmission.

[0054] The detection tube 2 has a first end and a second end that are relatively far apart. The first end of the detection tube 2 is the front end and is used to be inserted into the cavity for detection. The second end of the detection tube 2 is the rear end and is connected to the front end of the handle 1. The detection tube 2 is a hollow tube with a receiving cavity therein. The receiving cavity of the detection tube 2 is connected to the cavity of the handle 1, so that the components in the handle 1 and the components in the detection tube 2 can achieve physical and signal connection.

[0055] The acoustic head assembly 3 is arranged in the detection tube 2. The acoustic head assembly 3 is used to convert electrical signals into ultrasonic waves and emit ultrasonic waves. The acoustic head assembly 3 is also used to receive ultrasonic echoes reflected by the tissue in the cavity and convert the ultrasonic echoes into echo signals, which can be used to generate ultrasonic images.

[0056] The acoustic head assembly 3 includes a lens layer 31, a matching layer 32, a piezoelectric layer 33, and a backing layer 34, stacked in sequence. The piezoelectric layer 33 is a key component of the acoustic head assembly 3. It converts electrical signals into ultrasonic waves and ultrasonic echoes into echo signals. If the piezoelectric layer 33 is subject to external electromagnetic interference, the conversion between electrical signals and ultrasonic waves may be disrupted, thereby affecting ultrasonic imaging.

[0057] In this embodiment, the electromagnetic shielding setting of the acoustic head assembly 3 is mainly for electromagnetic shielding of the piezoelectric layer 33 .

[0058] The lens layer 31, matching layer 32, piezoelectric layer 33, and backing layer 34 are stacked to form a square or approximately square structure. The surface of the topmost lens layer 31 facing away from the matching layer 32 is the detection surface 3a, i.e., the upper surface of the lens layer 31 is the detection surface 3a, and the lower surface of the lens layer 31 is connected to the matching layer 32. The detection surface 3a of the lens layer 31 is used to transmit ultrasonic waves and receive ultrasonic echoes. The surface of the backing layer 34 facing away from the piezoelectric layer 33 is the mounting surface 3b, i.e., the upper surface of the backing layer 34 is connected to the piezoelectric layer 33, and the lower surface of the backing layer 34 is the mounting surface 3b. The mounting surface 3b of the backing layer 34 can be used to securely install the entire acoustic head assembly 3.

[0059] The lens layer 31, matching layer 32, piezoelectric layer 33, and backing layer 34 are stacked to form a first side surface 3c, a second side surface 3d, a third side surface 3e, and a fourth side surface 3f, which are connected end to end. The first side surface 3c, the second side surface 3d, the third side surface 3e, and the fourth side surface 3f are formed by splicing the side surfaces of the lens layer 31, the matching layer 32, the piezoelectric layer 33, and the backing layer 34. The first side surface 3c, the second side surface 3d, the third side surface 3e, the fourth side surface 3f, the detection surface 3a, and the mounting surface 3b are the six external surfaces of the acoustic head assembly 3. The first side surface 3c, the second side surface 3d, the third side surface 3e, and the fourth side surface 3f are located between the detection surface 3a and the mounting surface 3b.

[0060] The conductive shield assembly 4 includes a first conductive shield 41 and a second conductive shield 42. Two first conductive shields 41 are provided, one on each side of the acoustic head assembly 3. One first conductive shield 41 is disposed on the first side 3c of the acoustic head assembly 3 and shields at least the piezoelectric layer 33 on the first side 3c. The other first conductive shield 41 is disposed on the third side 3e of the acoustic head assembly 3 and shields at least the piezoelectric layer 33 on the third side 3e. One first conductive shield 41 can shield a portion of the first side 3c and completely shield the piezoelectric layer 33 on the first side 3c. Similarly, the other first conductive shield 41 can shield a portion of the third side 3e and completely shield the piezoelectric layer 33 on the third side 3e. In other words, the portions of the piezoelectric layer 33 exposed on the first and third sides 3c, 3e, are completely shielded by the two first conductive shields 41.

[0061] The first conductive shielding member 41 can be an electromagnetic shielding member such as a metal film. For example, the first conductive shielding member 41 can be copper foil. Metal films have both electromagnetic shielding and electrical conductivity properties. Metal films also have advantages such as thinness and light weight. The metal films can be attached to the first side surface 3c and the third side surface 3e using a conductive adhesive or other method. The first conductive shielding member 41 is attached to the piezoelectric layer 33 on the first side surface 3c and the third side surface 3e and is electrically connected to the piezoelectric layer 33.

[0062] In other embodiments, the first conductive shielding member 41 may also be a structure such as a metal sheet. For example, the first conductive shielding member 41 is a copper sheet, which also has the dual properties of electromagnetic shielding and conductivity. The thickness of the copper sheet may also be set to be thinner, and may also be able to achieve electromagnetic shielding and electrical connection to the piezoelectric layer 33.

[0063] In this embodiment, the second conductive shielding member 42 can be an electromagnetic shielding structure such as a metal block. For example, the first conductive shielding member 41 can be a copper block. The second conductive shielding member 42 can be fixed to the mounting surface 3b of the acoustic head assembly 3 by bonding or other means. The cross-section of the second conductive shielding member 42 perpendicular to the stacking direction of the lens layer 31, matching layer 32, piezoelectric layer 33, and backing layer 34 has the same shape and size as the cross-sections of the lens layer 31, matching layer 32, piezoelectric layer 33, and backing layer 34. This allows the second conductive shielding member 42 to completely cover the mounting surface 3b after being connected to the mounting surface 3b, i.e., the second conductive shielding member 42 blocks the lower surface of the piezoelectric layer 33.

[0064] The two first conductive shielding members 41 extend to the sides of the second conductive shielding member 42 respectively, that is, the second conductive shielding members 42 cover the sides of the piezoelectric layer 33, the backing layer 34 and the second conductive shielding member 42 respectively, so that the two second conductive shielding members 42 and the second conductive shielding members 42 can wrap and shield the two sides and the lower surface of the piezoelectric layer 33, and at the same time realize electrical connection between the two second conductive shielding members 42 and the second conductive shielding member 42.

[0065] The two first conductive shielding members 41 only need to extend to cover part of the side surface of the second conductive shielding member 42, which can save the number of the two first conductive shielding members 41 and also enable the two second conductive shielding members 42 and the second conductive shielding member 42 to wrap and shield the two side surfaces and one lower surface of the piezoelectric layer 33. Of course, the two first conductive shielding members 41 extend to cover the entire side surface of the second conductive shielding member 42.

[0066] In other embodiments, the cross-section of the second conductive shielding member 42 can be set to be smaller than the mounting surface 3b, that is, the second conductive shielding member 42 covers a portion of the mounting surface 3b, and the two first conductive shielding members 41 extend to cover other portions of the mounting surface 3b not covered by the second conductive shielding member 42. The combination of the two first conductive shielding members 41 and one second conductive shielding member 42 can also achieve complete coverage of the mounting surface 3b, that is, the combination of the two first conductive shielding members 41 and one second conductive shielding member 42 can also achieve complete coverage of the lower surface of the piezoelectric layer 33.

[0067] In this embodiment, the drive assembly 5 includes a drive member 51 and a hollow shaft 52. The drive member 51 is disposed within the cavity of the handle 1. The drive member 51 can be a drive structure such as a motor. The hollow shaft 52 is disposed within the accommodating cavity of the detection tube 2. One end of the hollow shaft 52 extends into the handle 1 and is connected to the drive member 51. The drive member 51 can be connected to the hollow shaft 52 via a transmission assembly such as a gear set 53. The drive member 51 is used to drive the hollow shaft 52 to rotate along the central axis of the hollow shaft 52. The hollow shaft 52 can be configured to achieve 360° rotation or rotation within a specific angle range.

[0068] The hollow shaft 52 is provided with a concave mounting portion 521 on the axial side of the inner part of the detection tube 2. The mounting portion 521 can be a groove structure. The mounting portion 521 has a first side wall 5211 and a second side wall 5212 facing each other. The first side wall 5211 and the second side wall 5212 are perpendicular to the axial direction of the hollow shaft 52.

[0069] The acoustic head assembly 3 and the conductive shielding assembly 4 are mounted within the mounting portion 521 of the hollow shaft 52. The hollow shaft 52 is a metal shaft that provides both electromagnetic shielding and electrical conductivity. The first sidewall 5211 shields all or part of the second side 3d of the acoustic head assembly 3 and completely shields the piezoelectric layer 33 on the second side 3d. The second sidewall 5212 shields all or part of the fourth side 3f of the acoustic head assembly 3 and completely shields the piezoelectric layer 33 on the fourth side 3f.

[0070] Among them, the distance between the first side wall 5211 and the second side wall 5212 of the mounting portion 521 is equal to the length of the sound head assembly 3, so that the first side wall 5211 abuts the second side surface 3d of the sound head assembly 3, and the second side wall 5212 abuts the fourth side surface 3f of the sound head assembly 3, forming a complete shielding of the piezoelectric layer 33 on the second side surface 3d and the fourth side surface 3f, and also enables the first side wall 5211, the second side wall 5212, the first conductive shielding component 41 and the second conductive shielding component to completely enclose the four side surfaces and one lower surface of the piezoelectric layer 33, forming an electromagnetic shielding for the piezoelectric layer 33.

[0071] In other embodiments, the distance between the first side wall 5211 and the second side wall 5212 may also be slightly larger than the length of the sound head assembly 3, the first side wall 5211 is close to the second side surface 3d of the sound head assembly 3, and a shielding structure such as a conductive shielding glue is set at the gap between the first side wall 5211 and the second side surface 3d of the sound head assembly 3, the second side wall 5212 is close to the fourth side surface 3f of the sound head assembly 3, and a shielding structure such as a conductive shielding glue is set at the gap between the second side wall 5212 and the fourth side surface 3f of the sound head assembly 3, which can also achieve electromagnetic shielding of the piezoelectric layer 33.

[0072] In this embodiment, the second conductive shielding member 42 can be fixedly connected to the bottom of the mounting portion 521. The second conductive shielding member 42 can have a certain thickness so that the second conductive shielding member 42 can be stably connected to the hollow shaft 52 by means of screws or the like. This can improve the stability of the acoustic head assembly 3 when the hollow shaft 52 drives the acoustic head assembly 3 to rotate, thereby ensuring stability during long-term use.

[0073] In other embodiments, the second conductive shielding member 42 may also be configured as a metal sheet, and the second conductive shielding member 42 and the hollow shaft 52 may be fixedly connected and electrically connected by welding.

[0074] In other embodiments, the second conductive shielding member 42 may also be a fixed block made of other materials, and an electromagnetic shielding layer is provided on the outer surface of the fixed block. The electromagnetic shielding layer may be a metal film structure such as aluminum foil, and may also realize electromagnetic shielding and electrical connection of the piezoelectric layer 33, and may also realize screw-fixed connection between the second conductive shielding member 42 and the hollow shaft 52.

[0075] In this embodiment, the acoustic head assembly 3 has a positive connection and a negative connection with the control board in the handle 1. The piezoelectric layer 33 of the acoustic head assembly 3 can achieve a positive connection with the control board via a positive flexible circuit board. One end of the positive flexible circuit board is connected to the piezoelectric layer 33, and the other end of the positive flexible circuit board can extend from the interior of the hollow shaft 52 into the handle 1 to connect to the control board. The piezoelectric layer 33 of the acoustic head assembly 3 is connected to the control board via the first conductive shield 41, the second conductive shield 42, and the hollow shaft 52, respectively. The hollow shaft 52 is plugged into the control board via a connecting terminal. The hollow shaft 52 can also be connected to the control board via a negative flexible circuit board or cable. The first conductive shield 41, the second conductive shield 42, and the hollow shaft 52 not only provide electromagnetic shielding but also serve as an electrical connection.

[0076] In other embodiments, the hollow shaft 52 may be made of other materials. The first sidewall 5211 and the second sidewall 5212 may be provided with an electromagnetic shielding layer. The electromagnetic shielding layer may be a metal film structure such as aluminum foil, which can also provide electromagnetic shielding and electrical connection to the piezoelectric layer 33. The second conductive shielding member 42 is directly electrically connected to the control board via a negative flexible circuit board or cable. The negative flexible circuit board or cable is inserted into the hollow shaft 52 and can also provide negative connection to the piezoelectric layer 33.

[0077] In this embodiment, since the hollow shaft 52 is provided with a concave mounting portion 521, the acoustic head assembly 3 is arranged in the mounting portion 521 of the hollow shaft 52, and the acoustic head assembly 3 is also connected to the first conductive shielding component 41 and the second conductive shielding component 42. The first conductive shielding component 41, the second conductive shielding component 42 and the hollow shaft 52 at least surround the piezoelectric layer 33 to form an electromagnetic shielding for the piezoelectric layer 33; wherein, the hollow shaft 52 is part of the shielding structure, which can save the material of the shielding component, simplify the shielding structure, and reduce the weight; the acoustic head assembly 3 is hidden in the hollow shaft, making the structure more compact and better able to meet the use requirements of a small volume in the cavity; and, the acoustic head assembly 3 is also connected to the hollow shaft 52 through the second conductive shielding component 42, which can improve the stability of the installation of the acoustic head assembly 3.

[0078] In one embodiment, the acoustic head assembly 3 can be rotatably arranged at the end of the hollow shaft 52, and the hollow shaft 52 can be fixedly installed in the detection tube 2. The driving member 51 can be connected to the acoustic head assembly 3 through a transmission component such as a pull rope. The driving member 51 drives the swing of the acoustic head assembly 3 through a handle, and can also realize the movable scanning and imaging of the acoustic head assembly 3, thereby expanding the scanning and imaging range.

[0079] An end face of the hollow shaft 52 away from the driving member 51 is provided with a concave mounting portion 521, and the combined structure of the acoustic head assembly 3 and the conductive shielding assembly 4 is installed in the mounting portion 521, which can also form an enclosed shield for the four side surfaces and the lower surface of the piezoelectric layer 33, and realize the positive and negative pole connections of the piezoelectric layer 33.

[0080] In other embodiments, the acoustic head assembly 3 may also be fixedly disposed at the end of the hollow shaft 52 to achieve directional ultrasonic detection.

[0081] Please refer to Figure 4 and Figure 5 In one embodiment, the depth of the mounting portion 521 of the hollow shaft 52 is less than the combined height of the acoustic head assembly 3 and the second conductive shielding member 42, part or all of the lens layer 31 of the acoustic head assembly 3 can be exposed from the mounting portion 521, the entire piezoelectric layer 33 is located in the mounting portion 521, and part or all of the lens layer 31 protrudes from the circumferential side of the hollow shaft 52, so that the hollow shaft 52 will not block the lens layer 31 from transmitting ultrasonic waves and receiving ultrasonic echoes.

[0082] In other embodiments, the depth of the mounting portion 521 of the hollow shaft 52 is equal to or slightly greater than the combined height of the acoustic head assembly 3 and the second conductive shielding component 42, the lens layer 31 of the acoustic head assembly 3 is entirely located within the mounting portion 521, and the detection surface of the lens layer 31 is flush with or slightly concave to the circumferential side of the mounting portion 521, so that the acoustic head assembly 3 can also emit ultrasonic waves and receive ultrasonic echoes along the radial direction of the hollow shaft 52.

[0083] Please refer to Figure 4 and Figure 5 In one embodiment, the mounting portion 521 of the hollow shaft 52 is a mounting slot with openings on either radial side. The first side 3c and the third side 3e of the acoustic head assembly 3 are aligned with the openings of the mounting slot, respectively. This arrangement facilitates connection to the positive electrode of the piezoelectric layer 33. Because the first conductive shielding member 41 is attached to the first side 3c and the third side 3e, the openings can eliminate some material from the hollow shaft 52, reducing its weight and further reducing the weight of the intracavity probe.

[0084] In one embodiment, an intracavity probe is provided. The intracavity probe of this embodiment differs from the intracavity probe of any of the above embodiments in that the second conductive shielding member 42 is not provided.

[0085] Please refer to Figure 7 In this embodiment, the mounting surface 3b of the acoustic head assembly 3 is directly fixedly connected to the bottom surface of the mounting portion 521 of the hollow shaft 52. The bottom surface of the mounting portion 521 covers the lower surface of the piezoelectric layer 33. The first conductive shielding parts 41 on both sides of the acoustic head assembly 3 extend to connect with the hollow shaft 52, and together with the bottom surface of the mounting portion 521, surround the lower end of the acoustic head assembly 3, thereby enclosing the four side surfaces and the lower surface of the piezoelectric layer 33.

[0086] In this embodiment, the first conductive shield 41 and the hollow shaft 52 surround the piezoelectric layer 33, providing electromagnetic shielding for the piezoelectric layer 33. The piezoelectric layer 33 can be electrically connected to the control board via the first conductive shield 41 and the hollow shaft 52, achieving a negative connection to the piezoelectric layer 33; the positive connection to the piezoelectric layer 33 is the same as in the previous embodiment.

[0087] In this embodiment, the second conductive shielding member 42 is omitted, which can further simplify the electromagnetic shielding structure and thus reduce the weight.

[0088] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art of the present invention can make some simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. An intracavity probe, characterized in that: include: handle; The detection tube has a first end and a second end that are relatively far apart, the first end is used for inserting into the cavity for detection, and the second end is connected to the handle; The acoustic head assembly includes a lens layer, a matching layer, a piezoelectric layer, and a backing layer stacked in sequence. The surface of the lens layer facing away from the matching layer is a detection surface, and the surface of the backing layer facing away from the piezoelectric layer is a mounting surface. The detection surface faces the outside of the detection tube and is used to transmit ultrasonic waves and receive ultrasonic echoes. The lens layer, the matching layer, the piezoelectric layer, and the backing layer are stacked to form a first side surface, a second side surface, a third side surface, and a fourth side surface connected end to end. A conductive shielding assembly, comprising a first conductive shielding member and a second conductive shielding member, wherein the first conductive shielding member is provided on both sides of the acoustic head assembly, the first conductive shielding member at least shields the piezoelectric layer on the first side surface and at least shields the piezoelectric layer on the third side surface, the first conductive shielding member is electrically connected to the piezoelectric layer and the second conductive shielding member, and the second conductive shielding member is fixed to the mounting surface of the acoustic head assembly; as well as A drive assembly comprising a drive member and a hollow shaft, wherein the drive member is disposed in the handle, the hollow shaft is disposed in the detection tube, the hollow shaft is provided with a concave mounting portion, the mounting portion having a first side wall and a second side wall facing each other; the hollow shaft has a conductive shielding property, the second conductive shielding member is fixedly connected and electrically connected to the hollow shaft; the acoustic head assembly is disposed in the mounting portion, the first side wall at least shields the piezoelectric layer in the second side surface, and the second side wall at least shields the piezoelectric layer in the fourth side surface; The driving member is connected to the hollow shaft or the acoustic head assembly, and the driving member is used to drive the acoustic head assembly to rotate or swing; The first conductive shielding component, the second conductive shielding component and the hollow shaft at least surround the piezoelectric layer to form an electromagnetic shield for the piezoelectric layer.

2. The intracavity probe according to claim 1, wherein: The mounting portion is located on a circumferential side surface of the hollow shaft. One end of the hollow shaft extends into the handle and is connected to the driving member. The driving member is used to drive the acoustic head assembly to rotate.

3. The intracavity probe according to claim 1, wherein: The mounting portion is located at an axial end of the hollow shaft. The driving member is connected to the acoustic head assembly via a pull rope. The pull rope is passed through the hollow shaft. The driving member is used to drive the acoustic head assembly to swing.

4. The intracavity probe according to claim 1, wherein: Part or all of the lens layer is exposed from the mounting portion.

5. The intracavity probe according to claim 1, wherein: The first conductive shielding member is attached to the first side surface and the third side surface.

6. The intracavity probe according to claim 5, wherein: The first conductive shielding component is a metal film.

7. The intracavity probe according to claim 1, wherein: The second conductive shielding component covers and shields the mounting surface.

8. The intracavity probe according to claim 7, wherein: The second conductive shielding member is a metal block, or an electromagnetic shielding layer is provided on the surface of the second conductive shielding member.

9. The intracavity probe according to claim 1, wherein: The first side wall is close to or abuts against the second side wall, and / or the second side wall is close to or abuts against the fourth side wall.

10. The intracavity probe according to claim 9, wherein: The hollow shaft is a metal rotating shaft; or, the first side wall and the second side wall of the hollow shaft are provided with an electromagnetic shielding layer.

11. The intracavity probe according to claim 1, wherein: The mounting portion is a mounting groove, and both sides of the mounting groove have side openings, and the first side surface and the third side surface are respectively aligned with the side openings of the mounting portion.

12. The intracavity probe according to any one of claims 1 to 11, characterized in that: It also includes a control board, which is arranged in the handle. The piezoelectric layer is electrically connected to the control board through a flexible circuit board. The piezoelectric layer is also electrically connected to the control board through the first conductive shielding component, the second conductive shielding component, the hollow shaft and a cable.

13. An intracavity probe, characterized in that: include: handle; The detection tube has a first end and a second end that are relatively far apart, the first end is used for inserting into the cavity for detection, and the second end is connected to the handle; The acoustic head assembly includes a lens layer, a matching layer, a piezoelectric layer, and a backing layer stacked in sequence. The surface of the lens layer facing away from the matching layer is a detection surface, and the surface of the backing layer facing away from the piezoelectric layer is a mounting surface. The detection surface faces the outside of the detection tube and is used to transmit ultrasonic waves and receive ultrasonic echoes. The lens layer, the matching layer, the piezoelectric layer, and the backing layer are stacked to form a first side surface, a second side surface, a third side surface, and a fourth side surface connected end to end. a first conductive shielding member disposed on both sides of the acoustic head assembly, the first conductive shielding member shielding at least the piezoelectric layer on the first side surface and at least the piezoelectric layer on the third side surface, the first conductive shielding member being connected to the acoustic head assembly; as well as A drive assembly comprising a drive member and a hollow shaft, wherein the drive member is disposed in the handle, the hollow shaft is disposed in the detection tube, the hollow shaft is provided with a concave mounting portion, the mounting portion having a first side wall and a second side wall facing each other; the hollow shaft has a conductive shielding property, the first conductive shielding member is electrically connected to the hollow shaft; the acoustic head assembly is disposed in the mounting portion, the first side wall at least shields the piezoelectric layer in the second side surface, and the second side wall at least shields the piezoelectric layer in the fourth side surface; The driving member is connected to the hollow shaft or the acoustic head assembly, and the driving member is used to drive the acoustic head assembly to rotate or swing; The first conductive shielding component and the hollow shaft at least surround the piezoelectric layer to form an electromagnetic shield for the piezoelectric layer.

14. The intracavity probe according to claim 13, wherein: The first conductive shielding component includes two metal films, one metal film covers the piezoelectric layer on the first side and extends to be electrically connected to the hollow shaft, and the other metal film covers the piezoelectric layer on the third side and extends to be electrically connected to the hollow shaft.

15. The intracavity probe according to claim 13, wherein: The mounting portion is located on a circumferential side surface of the hollow shaft. One end of the hollow shaft extends into the handle and is connected to the driving member. The driving member is used to drive the acoustic head assembly to rotate.

16. The intracavity probe according to any one of claims 13 to 15, characterized in that: It also includes a control board, which is arranged in the handle. The piezoelectric layer is electrically connected to the control board through a flexible circuit board. The piezoelectric layer is also electrically connected to the control board through the first conductive shielding component, the hollow shaft and a cable.

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