Torsion transmission element and ultrasonic probe

Abstract

The application discloses a torsion transmission element and an ultrasonic probe. The torsion transmission element has bending flexibility and can transmit a torsion force applied to one axial end to another axial end. The torsion transmission element is formed by coaxially and spirally winding a plurality of spring wires and at least one first signal line, and the first signal line is used for transmitting an electric signal. The torsion transmission element replaces one or more spring wires with the first signal line, and thus, whether the inner hole diameter of the torsion transmission element can allow the signal line to pass through does not need to be considered. In the case that the torsion transmission element has signal transmission capability, the outer diameter of the torsion transmission element can be smaller, and thus, it is beneficial to manufacture a smaller-diameter catheter, an ultrasonic probe and other interventional medical devices which need to be inserted into a human body cavity.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a torque transmission element and an ultrasonic probe. Background Technology

[0002] During examinations or surgical treatments, it is often necessary to insert medical instruments such as endoscopes, hemostatic forceps, and biopsy forceps into cavities such as the digestive tract, blood vessels, and urethra. Torsion spring tubes are one of the important components of medical instruments such as ultrasound probes.

[0003] With the widespread use of torsion spring tubes in intracavitary imaging medical devices such as ultrasound probes, the diameter requirements for ultrasound probe catheters are becoming increasingly smaller in order to allow them to be inserted into thinner and farther internal cavities. To meet the demand for fabricating even thinner catheters, the outer diameter requirements for the torsion spring tubes inside the catheters are also becoming increasingly smaller.

[0004] Existing torsion spring tubes such as Figure 1 As shown, the torsion spring tube 10 is typically made of 4-24 strands of spring wire. Because the signal wire passes through the inside of the torsion spring tube, it needs to retain an inner diameter. To ensure effective signal transmission within the signal wire, the outer diameter of the signal wire is fixed. Therefore, the inner diameter of the torsion spring tube must be larger than the maximum outer diameter of the signal wire. This means the outer diameter of the torsion spring tube cannot be made too small, thus limiting the design and manufacture of conduits with smaller outer diameters. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a torque transmission element and an ultrasonic probe to solve the problem that the diameter of the existing inner torsion spring tube is too large, which limits the manufacture of smaller outer diameter catheters.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0007] A torque transmission element is disclosed, the torque transmission element having bending flexibility and being capable of transmitting a torsional force applied to one axial end to another axial end; the torque transmission element is coaxially spirally wound with multiple spring wires and at least one first signal wire, the first signal wire being used to transmit electrical signals.

[0008] Furthermore, the first signal line includes a conductor core and an insulating sheath surrounding the conductor core.

[0009] Furthermore, the torque transmission element is a torsion spring tube with an internal axial through hole, and multiple spring wires and at least one first signal wire are coaxially wound to form the tube wall of the torsion spring tube.

[0010] Furthermore, the torsion spring tube has only one wall layer, and multiple spring wires and at least one first signal wire are spirally wound along the same axial direction with the same direction of rotation and the same helix angle to form the wall of the torsion spring tube; or,

[0011] The torsion spring tube has multiple layers of walls from the inside out. Multiple spring wires and at least one first signal wire are spirally wound along the same axis with the same direction of rotation and the same helix angle to form the outermost layer of the torsion spring tube wall.

[0012] Furthermore, the multiple spring wires on the same layer of the tube wall of the torsion spring tube have the same wire diameter, and the wire diameter of the first signal line is the same as the wire diameter of the spring wires located on the same layer of the tube wall.

[0013] Furthermore, both ends of the first signal line extend outward from the axial end of the torsion spring tube.

[0014] Furthermore, the sum of the number of spring wires in the torsion spring tube and the number of the first signal wires is 4-24.

[0015] Furthermore, the axial through hole inside the torsion spring tube allows the second signal line to pass through, and both the first and second signal lines are used to transmit electrical signals at both ends of the torsion spring tube in the axial direction.

[0016] Furthermore, the other axial end of the torsion spring tube is used to connect to the ultrasonic transducer. One end of the first signal line and one end of the second signal line are both electrically connected to the ultrasonic transducer. The first signal line is used to transmit a pulse excitation electrical signal to the ultrasonic transducer, and the second signal line is used to transmit back the ultrasonic echo signal collected by the ultrasonic transducer.

[0017] Furthermore, the other axial end of the torsion spring tube is used to connect the first ultrasonic transducer and the second ultrasonic transducer. One end of the first signal line is electrically connected to the first ultrasonic transducer, and one end of the second signal line is electrically connected to the second ultrasonic transducer. Both the first signal line and the second signal line are coaxial cables.

[0018] An ultrasonic probe includes a probe housing, a conduit, a drive shaft, an ultrasonic transducer, and a torque transmission element as described above. The conduit is connected to the distal opening of the probe housing. The drive shaft is rotatably disposed within the probe housing. One end of a torsion spring tube is fixedly connected to the drive shaft, and the other end of the torsion spring tube extends into the interior of the conduit. The ultrasonic transducer is connected to the other end of the torsion spring tube extending into the conduit. The torsion spring tube is used to transmit the torque applied by the drive shaft to the ultrasonic transducer.

[0019] The technical solution of this invention has the following advantages: this torque transmission element has bending flexibility and can transmit the torsional force applied to one axial end to another axial end; moreover, the torque transmission element is coaxially spirally wound with multiple spring wires and at least one first signal wire. Compared with the existing spring tube, by replacing one or more spring wires with the first signal wire, this torque transmission element does not need to consider whether the inner diameter of the torque transmission element can accommodate the signal wire. The outer diameter of the torque transmission element can be made smaller while still having signal transmission capability, which is beneficial for manufacturing smaller outer diameter conduits. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a torsion spring tube in the prior art;

[0022] Figure 2 This is a schematic diagram of the torsion spring tube in Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the torsion spring tube in Embodiment 2 of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Torque spring tube; 110. Spring wire; 120. First signal line. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. The distal end refers to the end furthest from the operator, and the proximal end refers to the end closest to the operator. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] To address the problem in existing technologies where the torsion spring tube's inner bore needs to accommodate signal lines, limiting the overall outer diameter of the torsion spring tube to a smaller size, which in turn prevents the conduit fitted around the torsion spring tube from being made thinner.

[0030] This application provides a torque transmission element that is flexible and bendable. When a catheter fitted around the periphery of the torque transmission element is advanced and turned within a body cavity, the torque transmission element can adapt to the bending deformation of the catheter, ensuring good passage and enabling it to reach lesions in narrower and more distant cavities. Simultaneously, the torque transmission element can transmit the applied torsional force from its proximal axial end to its distal axial end. When a torsional force is applied to the proximal axial end of the torque transmission element, it can transmit the torsional force to its distal axial end, thereby driving the transducer and other components connected to the distal axial end of the torque transmission element to rotate, allowing the transducer to perform a 360-degree scan of the target area. It should be noted here that the difference between the torque transmission element and conventional guidewires or catheters is that the torque transmission element has good bending flexibility while possessing excellent torsional stiffness (which can effectively transmit rotational torque). The torque transmission element is similar to a flexible drive shaft. When the operator applies rotational force to the proximal end of the torque transmission element, it can be efficiently and accurately transmitted to the transducer at the distal end of the torque transmission element, enabling the transducer to rotate and scan stably.

[0031] In some embodiments, the torque transmission element is coaxially spirally wound with multiple spring wires 110 and a first signal wire 120, the total number of spring wires 110 and the first signal wire 120 being between 4 and 24. The first signal wire 120 is a coaxial cable, comprising a positive electrode core, an inner insulation layer, multiple strands of negative electrode cores, and an outer insulation layer arranged sequentially from the inside out. The positive electrode core is used for electrical connection to the positive terminal of a transducer or sensor at the distal end of the torque transmission element, enabling the transducer or sensor to connect to the positive terminal of a power supply. The multiple strands of negative electrode core are used for electrical connection to the negative terminal of the transducer or sensor at the distal end of the torque transmission element, enabling the transducer or sensor to connect to the negative terminal of a power supply or ground. The inner insulation layer provides insulation between the positive electrode core and the multiple strands of negative electrode core, and the outer insulation layer provides insulation between the multiple strands of negative electrode core and the external environment. Of course, besides connecting the transducer or sensor to an external power source, the positive electrode core and the multi-strand negative electrode cores can also transmit electrical signals to the transducer or sensor, while the multi-strand negative electrode cores can transmit back the electrical signals collected by the transducer or sensor. In this case, to reduce electromagnetic interference between the electrical signals transmitted within the positive electrode core and the multi-strand negative electrode cores, an inner shielding layer is usually provided around the positive electrode core; similarly, to reduce electromagnetic interference from the external environment on the signals transmitted within the multi-strand negative electrode cores, an outer shielding layer is provided around the multi-strand negative electrode cores. In an alternative embodiment of the first signal line 120, the first signal line 120 may also adopt a structural design in which an outer insulating sheath simultaneously wraps the positive cable and the negative cable. In this case, the positive cable includes an inner positive core and a positive insulating layer sleeved on the outer periphery of the positive core, and the negative cable includes an inner negative core and a negative insulating layer sleeved on the outer periphery of the negative core. The outer insulating sheath wraps around the outer periphery of the independent positive cable and the negative cable.

[0032] Compared to existing Bourdon tubes, this torque transmission element replaces one or more spring wires 110 with a first signal wire 120. The torque transmission element does not need to consider whether its inner diameter is large enough for the signal wire to pass through. While still possessing signal transmission capability, the outer diameter of the torque transmission element can be made smaller, which facilitates the manufacture of smaller diameter conduits.

[0033] In other embodiments, when the distal end of the torque transmission element is connected to two or more transducers or sensors, the torque transmission element can be coaxially spirally wound from multiple spring wires 110 and two or more first signal lines 120. Each first signal line 120 is electrically connected to one of the transducers or sensors, and the two or more transducers or sensors are respectively connected to an external power supply through their respective first signal lines 120 and transmit the collected electrical signals back to the nearby signal processing device. This configuration divides the multiple signal lines that would otherwise be bundled into a single signal cable into two or more completely independent first signal lines 120, making the diameter of a single first signal line 120 smaller than the diameter of the original bundled signal cable. Using two or more of these smaller-diameter first signal lines 120 instead of the two or more spring wires in the existing spring tube to form the torque transmission element eliminates the need to consider whether the inner diameter of the element can accommodate the signal lines. The outer diameter of the torque transmission element can be made smaller while still possessing signal transmission capability, which is beneficial for manufacturing smaller-diameter conduits.

[0034] like Figure 2 As shown, in some embodiments, the torque transmission element is a torsion spring tube 100 with an internal axial through hole, and multiple spring wires 110 and a first signal wire 120 are coaxially wound to form the tube wall of the torsion spring tube 100. Compared with torque transmission elements without obvious internal through holes, this tubular torsion spring tube 100 can have a smaller helix angle of the spring wires 110, and the torsion spring tube 100 can have better bending performance and torsional stiffness, enabling more precise and real-time transmission of the rotation angle at the proximal end to the remotely connected component. It is understood here that the number of first signal wires 120 constituting the tube wall of the torsion spring tube 100 can also be multiple.

[0035] like Figure 2 As shown, in some embodiments, the torsion spring tube 100 has only one wall layer. Multiple spring wires 110 and a first signal wire 120 are spirally wound along the same axis with the same direction of rotation and the same helix angle to form the wall of the torsion spring tube 100. The multiple spring wires 110 have the same wire diameter, and the first signal wire 120 has the same wire diameter as the spring wires 110. The multiple spring wires 110 and the first signal wire 120 are tightly attached to form a continuous wall with a certain thickness. Adjacent spring wires 110 and spring wires 110 and the first signal wire 120 can be fixed by laser welding, soldering, adhesive bonding or mechanical interlocking to form a torsion spring tube 100 with bending elasticity and torsional rigidity.

[0036] like Figure 3As shown, in some embodiments, the torsion spring tube 100 has three layers of wall from the inside out. Multiple spring wires 110 and a first signal wire 120 are spirally wound along the same axis with the same direction of rotation and the same helix angle to form the outermost layer of the torsion spring tube 100. The multiple spring wires 110 constituting the outermost layer have the same wire diameter, and the first signal wire 120 has the same wire diameter as the spring wires 110 constituting the outermost layer. The multiple spring wires 110 and the first signal wire 120 are tightly bonded together to form a continuous outermost layer with a certain thickness. The middle layer of the torsion spring tube 100 is tightly attached to the inner side of the outermost layer, and the inner layer of the torsion spring tube 100 is tightly attached to the inner side of the middle layer. Both the middle and inner layers are formed by multiple spring wires 110 spirally wound along the same axis with the same direction of rotation and the same helix angle. It can be understood that the torsion spring tube 100 can also have two layers of wall. This multi-layered torsion spring tube 100 allows the spring wires 110 of the inner wall to be embedded in the gaps of the outer wall to form a geometric interlock. This improves the torsional stiffness, bending flexibility, and radial compressive strength of the torsion spring tube 100, meeting the requirements for torque transmission and flexible steering of the catheter in narrow cavities. In an alternative embodiment, the first signal line 120 can be located in the intermediate or inner wall layer, and the first signal line 120 is formed by coaxially spirally wound with multiple spring wires 110 using the same winding method. In other alternative embodiments, there can be two first signal lines 120, which can be located on different layers of the torsion spring tube 100.

[0037] like Figure 2 and Figure 3 As shown, in some embodiments, both ends of the first signal line 120 extend outward from the axial end of the torsion spring tube 100. The portions extending outward from both ends of the first signal line 120 can be connected to conductive connectors. The conductive connectors located at the distal end can be electrically connected to a transducer or sensor at the distal end of the torsion spring tube 100, and the conductive connectors located at the proximal end can be electrically connected to a signal processing device.

[0038] In some embodiments, the axial through-hole inside the torsion spring tube 100 allows the second signal line to pass through. When two or more transducers or sensors are connected to the distal end of the torsion spring tube 100, the first signal line 120 and the second signal line can be connected to two different transducers or sensors respectively. In this case, both the first signal line 120 and the second signal line are coaxial cables, and both the first signal line 120 and the second signal line have coaxially sleeved positive and negative wire cores inside. For example, when the distal end of the torsion spring tube 100 is connected to a first ultrasonic transducer and a second ultrasonic transducer, one end of the first signal line 120 is electrically connected to the first ultrasonic transducer, and one end of the second signal line is electrically connected to the second ultrasonic transducer; the first signal line 120 supplies power to the first ultrasonic transducer or transmits back the electrical signal collected by the first ultrasonic transducer, and the second signal line supplies power to the second ultrasonic transducer or transmits back the electrical signal collected by the second ultrasonic transducer. In some related technologies, multiple ultrasonic transducers need to be connected to the distal end of the spring tube, and each ultrasonic transducer needs to be connected to at least one signal line. These multiple signal lines are usually bundled together in a single signal cable, resulting in a relatively large diameter signal cable. Furthermore, because the signal cable needs to pass through the inner hole of the spring tube, the outer diameter of the spring tube cannot be made smaller. However, in this embodiment, the first signal line 120 is located on the wall of the torsion spring tube 100, and the axial through-hole of the torsion spring tube 100 only needs to allow the second signal line to pass through. Therefore, the outer diameter of the second signal line can be designed to be smaller than that of existing signal cables with multiple bundled signal lines. Correspondingly, the inner diameter of the torsion spring tube 100 can also be designed to be smaller. Based on achieving multimodal signal input and signal feedback, the outer diameter of the torsion spring tube 100 can be reduced, which is beneficial for manufacturing catheters, ultrasonic probes, intravascular ultrasound-optical dual-mode probes, and other interventional medical devices that need to be inserted into the human body cavity, all with smaller outer diameters.

[0039] In other embodiments, the first signal line 120 and the second signal line are respectively connected to the positive and negative terminals of the same transducer or sensor. In this case, both the first signal line 120 and the second signal line include a conductor core for transmitting electrical signals and an insulating sheath surrounding the conductor core. The insulating sheath is used to shield external electromagnetic signals from interfering with the electrical signals transmitted within the conductor core. For example, the conductor core inside the first signal line 120 is connected to the positive terminal of the transducer or sensor, and the conductor core inside the second signal line is connected to the negative terminal of the transducer or sensor. The conductor cores of the first signal line 120 and the second signal line form a power supply circuit with the transducer or sensor, and the conductor cores of the first signal line 120 and the second signal line can transmit electrical signals at both ends of the torsion spring tube 100 along its axial direction. In some related technologies, signal acquisition components such as transducers connected to the distal end of a spring tube typically require two or more signal lines. One signal line transmits control signals to the transducer or other signal acquisition component, while the other signal line transmits back the electrical signals acquired by the transducer or other signal acquisition component. A cable sheath is fitted around the two or more signal lines to form a bundle of signal cables. These signal cables pass through the inner hole of the spring tube, resulting in a relatively large outer diameter, which limits the outer diameter of the spring tube. However, in this embodiment, the first signal line 120 is located on the wall of the torsion spring tube 100. The axial through-hole of the torsion spring tube 100 only needs to allow the second signal line to pass through. Therefore, the outer diameter of the second signal line can be designed to be smaller than that of existing signal cables, and correspondingly, the inner diameter of the torsion spring tube 100 can also be designed to be smaller. While achieving signal input and signal transmission, the outer diameter of the torsion spring tube 100 can be reduced, which is beneficial for manufacturing catheters, ultrasound probes, and other interventional medical devices that need to be inserted into the human body cavity with smaller outer diameters. Furthermore, the second signal line is used to transmit the electrical signals collected by the transducer and other signal acquisition components, while the first signal line 120 is used to input electrical signals to the transducer and other signal acquisition components. Since the transducer and other signal acquisition components primarily collect low-intensity, high-frequency analog signals, these signals are highly susceptible to external electromagnetic interference; while the first signal line 120 mainly transmits high-intensity, interference-controllable electrical signals. By placing the less interference-sensitive first signal line 120 on the wall of the torsion spring tube 100 and the more easily interfered second signal line inside the torsion spring tube 100, and because the spring wire 110 of the torsion spring tube 100 is made of metal, the torsion spring tube 100 itself acts as a natural electromagnetic shielding layer, effectively protecting the weak electrical signals inside the second signal line from external electromagnetic interference and ensuring the quality of the transmitted electrical signals.Taking the connection of the distal end of the torsion spring tube 100 to an ultrasonic transducer as an example, one end of the first signal line 120 is electrically connected to the transmitting crystal of the ultrasonic transducer, and one end of the second signal line is electrically connected to the receiving crystal of the ultrasonic transducer. A pulse excitation electrical signal is transmitted to the transmitting crystal via the first signal line 120. The transmitting crystal, excited by the pulse excitation electrical signal, emits an ultrasonic signal outward. The receiving crystal collects the ultrasonic echo signal reflected by the tissue. The ultrasonic echo signal is transmitted back to the proximal ultrasonic signal processing module via the second signal line. The ultrasonic signal processing module processes the ultrasonic echo signal to obtain an ultrasonic image. Because the second signal line is well electromagnetically shielded by the torsion spring tube 100, the outer diameter of the torsion spring tube 100 can be further reduced while achieving pulse excitation electrical signal input, ultrasonic echo signal transmission, and ensuring the quality of the ultrasonic echo signal.

[0040] This application also provides an ultrasound probe, which includes the aforementioned torsion spring tube 100, a probe housing, a conduit, a drive shaft, and an ultrasound transducer. The conduit is connected to the distal opening of the probe housing. The drive shaft is rotatably mounted within the probe housing. One end of the torsion spring tube 100 is fixedly connected to the drive shaft, and the other end extends into the conduit. The ultrasound transducer is connected to the other end of the torsion spring tube 100 extending into the conduit. The torsion spring tube 100 transmits the torque applied by the drive shaft to the ultrasound transducer. Because the outer diameter of the torsion spring tube 100 is small, the outer diameter of the conduit can also be designed to be smaller, allowing the ultrasound probe's conduit and transducer to be inserted into lesions in narrower and more distant cavities. Simultaneously, the drive shaft can rotate the torsion spring tube 100 and the ultrasound transducer, enabling the ultrasound transducer to perform omnidirectional scanning of the target area.

[0041] In summary, the torsion spring tube and ultrasound probe provided in this embodiment of the invention, while possessing bending flexibility, can transmit the torsional force applied to the proximal end of the axis to the distal end. Moreover, the torsion spring tube 100 is coaxially spirally wound with multiple spring wires 110 and a first signal line 120. Compared with existing spring tubes that are only coaxially spirally wound with multiple spring wires, replacing one or more spring wires 110 with a first signal line 120 eliminates the need to consider whether the inner diameter of the torsion spring tube 100 can accommodate the signal line. The outer diameter of the torsion spring tube 100 can be made smaller while still possessing signal transmission capability, which is beneficial for manufacturing catheters, ultrasound probes, intravascular ultrasound-optical dual-mode probes, and other interventional medical devices that need to be inserted into the human body cavity, etc., with smaller outer diameters.

[0042] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A torque transmission element, characterized in that, The torque transmission element has bending flexibility and is capable of transmitting the torsional force applied to one axial end to another axial end; the torque transmission element is coaxially spirally wound with multiple spring wires (110) and at least one first signal line (120), the first signal line (120) being used to transmit electrical signals.

2. The torque transmission element according to claim 1, characterized in that, The first signal line (120) includes a conductor core and an insulating sheath surrounding the conductor core.

3. The torque transmission element according to claim 1, characterized in that, The torque transmission element is a torsion spring tube (100) with an internal axial through hole. Multiple spring wires (110) and at least one first signal line (120) are coaxially wound to form the tube wall of the torsion spring tube (100).

4. The torque transmission element according to claim 3, characterized in that, The torsion spring tube (100) has only one wall layer, and multiple spring wires (110) and at least one first signal wire (120) are spirally wound along the same axis with the same direction of rotation and the same helix angle to form the wall of the torsion spring tube (100); or, The torsion spring tube (100) has multiple layers of walls from the inside out. Multiple spring wires (110) and at least one first signal wire (120) are spirally wound along the same axis with the same direction of rotation and the same helix angle to form the outermost layer of the torsion spring tube (100).

5. The torque transmission element according to claim 4, characterized in that, The multiple spring wires (110) on the same layer of the tube wall of the torsion spring tube (100) have the same wire diameter, and the wire diameter of the first signal line (120) is the same as that of the spring wires (110) located on the same layer of the tube wall.

6. The torque transmission element according to claim 3, characterized in that, The sum of the number of spring wires (110) and the number of first signal lines (120) in the torsion spring tube (100) is 4-24.

7. The torque transmission element according to any one of claims 3-6, characterized in that, The axial through hole inside the torsion spring tube (100) allows the second signal line to pass through. Both the first signal line (120) and the second signal line are used to transmit electrical signals at both ends of the axial direction of the torsion spring tube (100).

8. The torque transmission element according to claim 7, characterized in that, The other axial end of the torsion spring tube (100) is used to connect to the ultrasonic transducer. One end of the first signal line (120) and the second signal line are both electrically connected to the ultrasonic transducer. The first signal line (120) is used to transmit a pulse excitation electrical signal to the ultrasonic transducer, and the second signal line is used to transmit back the ultrasonic echo signal collected by the ultrasonic transducer.

9. The torque transmission element according to claim 7, characterized in that, The other axial end of the torsion spring tube (100) is used to connect the first ultrasonic transducer and the second ultrasonic transducer. One end of the first signal line (120) is electrically connected to the first ultrasonic transducer, and one end of the second signal line is electrically connected to the second ultrasonic transducer. Both the first signal line (120) and the second signal line are coaxial cables.

10. An ultrasonic probe, characterized in that, The device includes a probe housing, a conduit, a drive shaft, an ultrasonic transducer, and a torque transmission element as described in any one of claims 3-9 above; the conduit is connected to the distal opening of the probe housing, the drive shaft is rotatably disposed within the probe housing, one end of the torsion spring tube (100) is fixedly connected to the drive shaft, the other end of the torsion spring tube (100) extends into the interior of the conduit, the ultrasonic transducer is connected to the other end of the torsion spring tube (100) extending into the conduit, and the torsion spring tube (100) is used to transmit the torque applied by the drive shaft to the ultrasonic transducer.

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