Intracavity probe

Abstract

The utility model relates to the field of ultrasonic probes, in particular to an intracavity probe. An intracavity probe includes: a sound head assembly including a sound head rotating shaft and an ultrasonic transducer; the sound head rotating shaft is rotationally assembled on the mounting base body, and the sound head rotating shaft has a rotating angle range not smaller than 360 degrees; the transmission screw is connected with the sound head rotating shaft so as to synchronously rotate along with the sound head rotating shaft; the limiting sliding seat is movably arranged on the mounting base body in the axial direction of the transmission screw, a threaded hole is formed in the limiting sliding seat, and the limiting sliding seat and the transmission screw form spiral transmission through the threaded hole, so that rotation of the transmission screw is converted into translation of the limiting sliding seat; a limiting structure is arranged between the mounting base body and the limiting sliding seat, and the limiting structure is used for limiting the translation stroke of the limiting sliding seat so as to limit the maximum rotation angle of the sound head rotating shaft. The utility model mainly solves the technical problem that the probe is damaged due to the fact that the rotating angle of the sound head rotating shaft of the intracavity probe is possibly too large.

Description

Technical Field

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

[0002] An intracavitary probe is an ultrasound probe that can be inserted into the cavity of a human organ, for example, to perform ultrasound examinations on patients through the rectum, vagina, esophagus, etc.

[0003] In some related technologies, when the intracavity probe is working, the internal acoustic head shaft needs to drive the acoustic head to rotate. In order to ensure the normal operation of the intracavity probe, an encoder can be set on the intracavity probe to detect the rotation angle of the acoustic head shaft.

[0004] However, if some abnormal situations occur, such as encoder failure, encoder cable damage, accidental power failure of the probe, etc., the intracavity probe may not be able to accurately read the rotation angle of the acoustic head shaft. If the rotation of the acoustic head shaft is still controlled according to the normal state, the rotation angle of the acoustic head shaft may exceed the set value, causing damage to the internal components of the intracavity probe. Utility Model Content

[0005] The utility model mainly solves the technical problem that the rotation angle of the acoustic head shaft of the intracavity probe may be too large, which may cause damage to the probe.

[0006] The utility model provides an intracavity probe.

[0007] An intracavity probe, comprising:

[0008] An acoustic head assembly, the acoustic head assembly comprising an acoustic head shaft and an ultrasonic transducer, wherein the ultrasonic transducer is disposed on the acoustic head shaft;

[0009] A mounting base, on which the acoustic head shaft is rotatably mounted;

[0010] A drive unit, the drive unit being disposed on the mounting base and connected to the acoustic head shaft to drive the acoustic head assembly to rotate around the axis of the acoustic head shaft, wherein the acoustic head shaft has a rotation angle range of not less than 360 degrees;

[0011] and a transmission screw and a limiting slide, the transmission screw is connected to the sound head shaft to rotate synchronously with the sound head shaft; the limiting slide is arranged on the mounting base along the axial movement of the transmission screw, and a threaded hole is provided on the limiting slide, and the limiting slide forms a spiral transmission with the transmission screw through the threaded hole to convert the rotation of the transmission screw into the translation of the limiting slide; a limiting structure is provided between the mounting base and the limiting slide, and the limiting structure is used to limit the translation stroke of the limiting slide to limit the maximum rotation angle of the sound head shaft.

[0012] In one embodiment, the transmission screw and the acoustic head shaft are an integral structure, or the transmission screw is coaxially fixed to the acoustic head shaft.

[0013] In one embodiment, the acoustic head shaft has a threaded section, the transmission screw is formed by the threaded section, and the outer diameter of the threaded section is larger than the outer diameter of the adjacent portion.

[0014] In one embodiment, the acoustic head shaft has optical axis segments located at both axial ends of the threaded segment.

[0015] In one embodiment, the acoustic head shaft has a transmission section, the transmission section extends out of the side of the mounting base away from the ultrasonic transducer, the drive unit is connected to the transmission section, and the transmission screw is connected to the transmission section.

[0016] In one embodiment, the limiting structure includes a blocking seat, which is fixed on the mounting base. A sliding groove is provided on the blocking seat, and at least a portion of the limiting slide is located in the sliding groove. Two relative groove walls of the sliding groove limit the translational travel of the limiting slide.

[0017] In one embodiment, the blocking seat includes a bottom seat body and a first limiting platform and a second limiting platform protruding from the bottom seat body, and the sliding groove is surrounded by the first limiting platform, the second limiting platform and the bottom seat body.

[0018] In one embodiment, a side surface of the first limiting platform is fixedly connected to an end surface of the mounting base.

[0019] In one embodiment, a guide column is provided on the mounting base, the guide column is parallel to the axis of the transmission screw, and the limiting slide is movably assembled on the guide column.

[0020] In one embodiment, a guide groove is provided on the mounting base, the limiting slide is movably assembled in the guide groove, and the groove wall of the guide groove guides the limiting slide.

[0021] In one embodiment, the transmission screw has a rotation angle range of not less than 720 degrees, the acoustic head shaft has a first rotation direction and a second rotation direction, the unidirectional rotation range of the acoustic head shaft in the first rotation direction is not less than 360 degrees, and the unidirectional rotation range of the acoustic head shaft in the second rotation direction is not less than 360 degrees.

[0022] In one embodiment, the maximum rotation angle range of the acoustic head axis is 1080 degrees.

[0023] Beneficial effects of the utility model:

[0024] The intracavity probe in the present invention is provided with a transmission screw and a limit slide, and the limit slide forms a spiral transmission with the transmission screw through the threaded hole to convert the rotation of the transmission screw into the translation of the limit slide, so that the rotation of the sound head shaft and the translation of the limit slide are mutually related. By setting a limit structure to limit the translation stroke of the limit slide, a mechanical limit can be formed on the rotation angle range of the sound head shaft, and the translation stroke of the limit slide can be conveniently controlled to limit the maximum rotation angle of the sound head shaft. Under the condition of meeting the rotation angle requirement of the sound head shaft having an angular range of not less than 360 degrees, it can avoid that the rotation angle of the sound head shaft is too large when the angle detection of the sound head shaft is abnormal, thereby avoiding damage to the intracavity probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of an embodiment of an intracavity probe in the present utility model;

[0026] Figure 2 yes Figure 1 Schematic diagram of a part of the structure;

[0027] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle acoustic head shaft;

[0028] Figure 4 It is a structural diagram of the drive unit and the limit slide;

[0029] Figure 5 This is the principle diagram of the rotation limit of the sound head assembly.

[0030] List of feature names corresponding to the reference numerals in the figures:

[0031] 100, housing assembly; 110, handle housing; 120, probe housing; 121, acoustic window housing; 122, connection housing;

[0032] 200, shaft seat; 210, base end surface;

[0033] 300, acoustic head assembly; 310, acoustic head shaft; 311, mounting cavity; 312, transmission section; 313, threaded section; 314, optical axis section; 320, ultrasonic transducer; 330, bearing;

[0034] 400, driving unit; 410, driving pulley; 420, driven pulley; 430, synchronous belt;

[0035] 510, transmission screw; 520, limit slide; 530, guide column;

[0036] 600, blocking seat; 610, bottom seat; 621, first limiting platform; 622, second limiting platform. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments use associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and 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 part of the present application being overwhelmed by too much description. 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.

[0038] 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.

[0039] The serial numbers assigned to components herein, such as "first," "second," etc., 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).

[0040] In an embodiment of an intracavitary probe of the present invention, by setting a transmission screw 510 and a limit slide 520 connected by a threaded transmission, the rotation of the acoustic head shaft 310 exceeding 360 degrees can be converted into a displacement of a smaller stroke of the limit slide 520. By limiting the translational stroke of the limit slide 520, the rotation angle of the transmission screw 510 can be limited, thereby limiting the rotation angle of the acoustic head shaft 310, avoiding the problem that when a stopping structure is directly set on the acoustic head shaft 310, the size limitation of the stopping structure itself makes it impossible to adapt to the rotation range of the acoustic head shaft 310 greater than 360 degrees.

[0041] An embodiment of an intracavity probe in the present utility model:

[0042] The intracavity probe is used to collect ultrasound data by being inserted into a body cavity. During use, the ultrasound probe can be connected to an ultrasound host, which can receive and process the ultrasound data and generate ultrasound images. In one embodiment, the intracavity probe includes a housing assembly 100 and a core.

[0043] As an example, see Figure 1 and Figure 2 The housing assembly 100 includes a handle housing 110 and a probe housing 120 connected to the handle housing 110. The probe housing 120 includes an acoustic window housing 121 and a connecting housing 122. The end of the connecting housing 122 facing away from the acoustic window housing 121 is connected to the handle housing 110 or the rotating shaft seat 200. The acoustic window housing 121 and the connecting housing 122 both have an inner cavity. The end of the acoustic window housing 121 close to the connecting housing 122 can be fixedly connected to the connecting housing 122, and the other end is a closed end. The acoustic window housing 121 is arranged corresponding to the ultrasonic transducer 320 on the core body, and can be made of a material that is conducive to ultrasonic transmission to ensure the quality of scanning imaging. In some other embodiments, the acoustic window housing 121 and the connecting housing 122 can be made of the same material or different materials.

[0044] In one embodiment, the intracavitary probe includes a shaft base 200, which can be used for rotatable assembly of the acoustic head assembly 300 and for fixed connection of the handle housing 110 and the probe housing 120. The specific structural form of the shaft base 200 is not limited and can be a block structure or a shell structure. The handle housing 110 and the probe housing 120 can be fixed to the shaft base 200 in any manner. For example, they can be fixed to the shaft base 200 by means of snap-fitting, ultrasonic welding, bonding, fastener connection, etc., and at least a portion of the housing assembly 100 can be integrally formed with the shaft base 200.

[0045] The core is disposed inside the housing assembly 100 and may include an acoustic head assembly 300 , a driving unit 400 and a limiting assembly.

[0046] The acoustic head assembly 300 may include an acoustic head shaft 310 and an ultrasonic transducer 320. The ultrasonic transducer 320 is disposed on the acoustic head shaft 310. Figure 2 and Figure 3 In a specific embodiment, the acoustic head shaft 310 can be a hollow shaft, and the interior can be used for wires to pass through. The number and purpose of the wires can be set as needed, for example, they can include signal lines for transmitting ultrasonic detection signals. Bearings 330 can be provided at the distal end and the proximal end of the acoustic head shaft 310 to ensure the flexible and stable rotation of the acoustic head shaft 310. The outer ring of the bearing 330 located at the distal end of the acoustic head shaft 310 can be fixed on the acoustic window shell 121, and the outer ring of the bearing 330 located at the proximal end of the acoustic head shaft 310 can be fixed on the shaft seat 200. The type and assembly structure of the bearing 330 can refer to the existing structures in the relevant technology. Considering that it has no direct relevance to the innovative content of this application and the technical problems to be solved, it will not be repeated here.

[0047] The terms "proximal" and "distal" appearing in this article are conventional terms in the medical field. For an instrument to be operated, the proximal end is the end closest to the operator, and the distal end is the end away from the operator, usually the end that first enters the patient's body. Figure 1 The displayed direction.

[0048] The distal end of the acoustic head shaft 310 is provided with a mounting cavity 311, and the ultrasonic transducer 320 can be embedded in the mounting cavity 311. The shape of the ultrasonic transducer 320 can be set according to the use requirements of the intracavity probe. Those skilled in the art will understand that the basic function of the ultrasonic transducer 320 is to realize the mutual conversion between electrical energy and acoustic energy. Specifically, it can convert electrical signals into ultrasonic waves and transmit them out, and it can also receive reflected ultrasonic waves and convert them back into electrical signals. The above processes respectively utilize the positive piezoelectric effect (electrical energy to acoustic energy) and the inverse piezoelectric effect (acoustic energy to electrical energy) of piezoelectric materials.

[0049] The acoustic head assembly 300 is primarily located axially within the probe housing 120, with its proximal end extending through a mounting hole in the shaft seat 200 and into the handle housing 110, forming a transmission section 312. The drive unit 400 and the position limiting assembly can be disposed within the handle housing 110, fully utilizing the larger interior space within the handle housing 110. In other embodiments, if the internal space meets the required requirements, the position limiting assembly can also be disposed within the handle housing 110, or within the mounting base.

[0050] The drive unit 400 can be a stepper motor or a servo motor. The drive unit 400 is connected to the acoustic head shaft 310 in a transmission manner to drive the acoustic head assembly 300 to rotate around the axis of the acoustic head shaft 310, thereby rotationally driving the ultrasonic transducer 320 to perform a radial scanning operation to obtain a corresponding ultrasonic image. In one embodiment, a driving pulley 410 is fixed to the output shaft of the drive unit 400, and a driven pulley 420 is fixed to the transmission section 312 of the acoustic head shaft 310. The driving pulley 410 and the driven pulley 420 are synchronous pulleys, and the two are connected by a synchronous belt 430. The synchronous belt drive can realize the rotation of the acoustic head shaft 310 and accurately realize the rotation angle control. It will be understood by those skilled in the art that the transmission structure between the acoustic head shaft 310 and the drive unit 400 can also be replaced with other forms, such as using a gear meshing transmission, and the number of gear stages can be arranged as needed.

[0051] In some embodiments, the acoustic head assembly 300 has a rotatable range exceeding 720 degrees and is capable of rotating within an angular range of not less than 720 degrees. It should be noted that the angular range of rotation of the acoustic head assembly 300 of not less than 720 degrees means that the acoustic head assembly 300 can rotate more than or equal to two revolutions in either the counterclockwise or clockwise direction about its central axis. Alternatively, it may mean that the total angular range of rotation of the acoustic head assembly 300 about its central axis in both the counterclockwise and clockwise directions is not less than 720 degrees. The specific range of rotation may vary depending on design requirements, such as rotation within a range of 0 to 720 degrees, rotation within a range of -360 to +360 degrees, or rotation within a range of 0 to 810 degrees, or even rotation within a range exceeding 810 degrees. 0 degrees may be the starting rotation angle of the acoustic head assembly 300, 720 degrees and 810 degrees may be the ending rotation angles of the acoustic head assembly 300 in one direction, and -360 degrees and +360 degrees may be the ending rotation angles of the acoustic head assembly 300 in a counterclockwise direction and a clockwise direction, respectively. The starting rotation angle of the acoustic head assembly 300 may also be -180 degrees, -360 degrees, etc.; accordingly, the ending rotation angle of the acoustic head assembly 300 is the difference between the travel angle of the acoustic head assembly 300 and the starting rotation angle of the acoustic head assembly 300.

[0052] In one embodiment, the acoustic head rotation axis 310 has a first rotation direction and a second rotation direction. The unidirectional rotation range of the acoustic head rotation axis 310 in the first rotation direction is not less than 360 degrees, and the unidirectional rotation range of the acoustic head rotation axis 310 in the second rotation direction is also not less than 360 degrees. It is understood that one of the first rotation direction and the second rotation direction can be the aforementioned clockwise direction, and the other can be the aforementioned counterclockwise direction.

[0053] Exemplarily, the rotation of the acoustic head shaft 310 within a stroke angle of not less than 720 degrees includes rotation from a first stroke angle to a second stroke angle, where the first stroke angle is the starting rotation angle or the reverse ending rotation angle of the acoustic head assembly 300, and the second stroke angle is the positive ending rotation angle of the acoustic head assembly 300, where the positive direction is one of the clockwise direction and the counterclockwise direction, and the reverse direction is the other of the clockwise direction and the counterclockwise direction.

[0054] For example, when the first travel angle is 0 degrees and the second travel angle is 720 degrees, the drive unit 400 can only drive the acoustic head shaft 310 to rotate between 0 and 720 degrees to protect the electrical connectors within the acoustic head shaft 310, thereby preventing the electrical connectors from affecting the transmission performance of the acoustic head assembly 300 when twisted or squeezed. Alternatively, when the first travel angle is 0 degrees and the second travel angle is greater than 720 degrees, the drive unit 400 drives the acoustic head shaft 310 to rotate within an angle range between 0 and greater than 720 degrees to achieve large-angle rotation of the acoustic head assembly 300, thereby meeting various angular requirements of the acoustic head assembly 300 and improving the scanning efficiency of the acoustic head assembly 300. This also protects the electrical connectors within the acoustic head shaft 310. Twisting or squeezing of the electrical connectors may affect the transmission performance of the acoustic head assembly 300, or even damage the electrical connectors. Alternatively, when the first stroke angle is -360 degrees and the second stroke angle is +360 degrees, the driving unit 400 drives the acoustic head shaft 310 to rotate within any angle range between -360 degrees and +360 degrees to achieve free forward and reverse angle selection of the acoustic head assembly 300, thereby meeting various angle requirements of the acoustic head assembly 300.

[0055] In one embodiment, the maximum rotational angle range of the acoustic head shaft 310 is 1080 degrees. The acoustic head shaft 310 can rotate one and a half turns in the first rotational direction, i.e., 540 degrees in the first rotational direction, and can rotate one and a half turns in the first rotational direction, i.e., 540 degrees in the second rotational direction. By limiting the maximum rotational angle range to 1080 degrees, damage to electrical connectors caused by excessive rotation of the acoustic head shaft 310 can be better avoided.

[0056] When the acoustic head assembly 300 rotates, an encoder can be provided within the intracavity probe to detect the position of the intracavity probe, thereby ensuring the effective operation of the acoustic head assembly 300. However, if the encoder malfunctions, the encoder cable is damaged, or the probe unexpectedly loses power during the rotation of the acoustic head assembly 300, the intracavity probe may not be able to accurately read the actual rotation angle of the acoustic head assembly 300. In this case, if the driving device continues to drive the acoustic head assembly 300 to rotate, the internal components of the intracavity probe may be damaged.

[0057] In order to effectively limit the rotation angle of the sound head assembly 300 when the rotation of the sound head assembly 300 is abnormal, the intracavity probe also includes a transmission screw 510 and a limit slide 520. The transmission screw 510 is connected to the sound head shaft 310 to rotate synchronously with the sound head shaft 310; the limit slide 520 is arranged on the mounting base along the axial movement of the transmission screw 510, and a threaded hole (not shown in the figure) is provided on the limit slide 520. The limit slide 520 forms a spiral transmission with the transmission screw 510 through the threaded hole to convert the rotation of the transmission screw 510 into the translation of the limit slide 520; a limiting structure is provided between the mounting base and the limiting slide 520, and the limiting structure is used to limit the translation stroke of the limit slide 520 to limit the maximum rotation angle of the sound head shaft 310. The mounting base can be formed by the shaft seat 200 alone. In some other embodiments, it can also be formed by the shaft seat 200 and the handle housing 110, by the shaft seat 200 and the probe housing 120, or by the shaft seat 200, the probe housing 120 and the handle housing 110.

[0058] By setting the above-mentioned limit assembly, when the actual rotation angle of the acoustic head assembly 300 exceeds the set angle range, the limit slide 520 can play a mechanical limiting role on the acoustic head assembly 300, thereby preventing the acoustic head assembly 300 from excessively rotating and causing greater damage to related components in the intracavitary probe.

[0059] In some embodiments, please refer to Figure 4 and Figure 5 The transmission screw 510 and the acoustic head shaft 310 are an integral structure. A threaded section 313 can be directly processed on the transmission section 312 of the acoustic head shaft 310. The transmission screw 510 is formed by the threaded section 313, and the outer diameter of the threaded section 313 can be larger than the outer diameter of the adjacent part. Using the threaded section 313 as the transmission screw 510 has a simple structure and can reduce the number of parts. In some other embodiments, the transmission screw 510 and the acoustic head shaft 310 can also be manufactured separately and welded into one. In addition, the transmission screw 510 can also be coaxially assembled on the acoustic head shaft 310. The assembly method is not limited. For example, it can be connected in a plug-in manner and torque transmission can be achieved through a key connection, or through a flange connection. In addition, a sleeve with an external thread can be sleeved on the acoustic head shaft 310, and a transmission screw 510 can be formed on the acoustic head shaft 310 by relying on the thread on the sleeve. It should be noted that the transmission screw 510 can be located at the end of the transmission section 312 or in the middle of the transmission section 312. When the transmission screw 510 is located in the middle of the transmission section 312, the acoustic head shaft 310 has optical axis sections 314 located at both axial ends of the threaded section 313, which facilitates the rotational assembly of the acoustic head shaft 310 and facilitates transmission connection with the drive unit 400.

[0060] The threaded hole on the limiting slide 520 forms a threaded transmission connection with the transmission screw 510. The specific form of the thread is not limited, for example, it can be a triangular thread or a trapezoidal thread. The shape of the limiting slide 520 is not limited, for example, it can be circular, rectangular, elliptical, etc. In order to allow the limiting slide 520 to be axially movable along the transmission screw 510 and to be set on the mounting base, a guide structure should be provided on the mounting base. The specific form of the guide structure is not limited, for example, in some embodiments, please refer to Figure 4 The guide structure can be a guide post 530 fixed to the rotating shaft seat 200. The number of guide posts 530 can be one or more. Each guide post 530 extends along the axial direction of the transmission screw 510. Correspondingly, a guide hole can be provided on the limiting slide 520, and the guide post 530 passes through the guide hole.

[0061] Those skilled in the art will understand that in some other embodiments, the guide structure may also be replaced with other forms. For example, for a non-circular limit slide 520, a guide groove may be provided on the inner wall of the handle housing 110, and the outer contour of the limit slide 520 and the guide groove may be used to form a guide and limit the rotation of the limit slide 520.

[0062] It should be noted that, in some other embodiments, the transmission screw 510 and the limiting slide 520 may also be arranged at other locations of the mounting base, such as at the distal end of the rotating shaft seat 200 .

[0063] The limiting structure between the mounting base and the limiting slide 520 can be in any form as long as it can limit the limiting slide 520. For example, in some embodiments, please refer to Figure 4 and Figure 5 The limiting structure includes a blocking seat 600 fixed to the rotating shaft seat 200. The blocking seat 600 is provided with a slide groove. At least a portion of the limiting slide 520 is located within the slide groove. Two opposing groove walls of the slide groove limit the translational travel of the limiting slide 520. In a specific embodiment, the blocking seat 600 is a "U"-shaped structure, including a base body 610 and a first limiting platform 621 and a second limiting platform 622 protruding from the base body 610. The slide groove is surrounded by the first limiting platform 621, the second limiting platform 622, and the base body 610. Relying on the blocking seat 600 fixed to the rotating shaft seat 200 to limit the limiting slide 520 facilitates achieving a more accurate limiting position.

[0064] In some other embodiments, two limiting protrusions can be provided on the inner wall of the handle housing 110 , and the two limiting protrusions are arranged at intervals, and a portion of the limiting slide 520 is located between the two limiting protrusions, which can also achieve the limitation of the limiting slide 520 .

[0065] During use, the drive unit 400 drives the acoustic head assembly 300 to rotate slightly more than 720 degrees, for example, slightly more than 360 degrees in both the forward and reverse directions. The drive screw 510 rotates along with the acoustic head shaft 310 and drives the limit slide 520 to translate. When the drive screw 510 accidentally rotates beyond the set rotation angle range, for example, exceeding 1 degree (which can be increased or decreased as needed), the limit slide 520 will move to the translation limit and stop moving. Since the drive screw 510 and the limit slide 520 are still in a threaded transmission connection state, they can limit the drive screw 510 from continuing to rotate, thereby achieving the limitation of the acoustic head shaft 310. Of course, in some other embodiments, the above-mentioned drive screw and limit slide can also be applied to the case where the rotation range of the acoustic head assembly 300 is greater than or equal to 360 degrees and less than 720 degrees.

[0066] 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: An acoustic head assembly, the acoustic head assembly comprising an acoustic head shaft and an ultrasonic transducer, wherein the ultrasonic transducer is disposed on the acoustic head shaft; A mounting base, on which the acoustic head shaft is rotatably mounted; A drive unit, the drive unit being disposed on the mounting base and connected to the acoustic head shaft to drive the acoustic head assembly to rotate around the axis of the acoustic head shaft, wherein the acoustic head shaft has a rotation angle range of not less than 360 degrees; and a transmission screw and a limiting slide, the transmission screw is connected to the sound head shaft to rotate synchronously with the sound head shaft; the limiting slide is arranged on the mounting base along the axial movement of the transmission screw, and a threaded hole is provided on the limiting slide, and the limiting slide forms a spiral transmission with the transmission screw through the threaded hole to convert the rotation of the transmission screw into the translation of the limiting slide; a limiting structure is provided between the mounting base and the limiting slide, and the limiting structure is used to limit the translation stroke of the limiting slide to limit the maximum rotation angle of the sound head shaft.

2. The intracavity probe according to claim 1, wherein: The transmission screw and the acoustic head shaft are an integral structure, or the transmission screw is coaxially fixed to the acoustic head shaft.

3. The intracavity probe according to claim 2, wherein: The acoustic head shaft has a threaded section, the transmission screw is formed by the threaded section, and the outer diameter of the threaded section is greater than the outer diameter of the adjacent part.

4. The intracavity probe according to claim 3, wherein: The acoustic head rotating shaft has optical axis sections located at both axial ends of the threaded section.

5. The intracavity probe according to any one of claims 1 to 4, characterized in that: The acoustic head shaft has a transmission section, which extends out from a side of the mounting base away from the ultrasonic transducer. The drive unit is connected to the transmission section, and the transmission screw is connected to the transmission section.

6. The intracavity probe according to any one of claims 1 to 4, characterized in that: The limiting structure includes a blocking seat, which is fixed on the mounting base. A sliding groove is provided on the blocking seat. At least a portion of the limiting slide is located in the sliding groove. Two relative groove walls of the sliding groove limit the translational travel of the limiting slide.

7. The intracavity probe according to claim 6, wherein: The blocking seat includes a bottom seat body and a first limiting platform and a second limiting platform protruding from the bottom seat body. The sliding groove is surrounded by the first limiting platform, the second limiting platform and the bottom seat body.

8. The intracavity probe according to claim 7, wherein: The side surface of the first limiting platform is fixedly connected to the end surface of the mounting base.

9. The intracavity probe according to any one of claims 1 to 4, characterized in that: A guide column is provided on the installation base, the guide column is parallel to the axis of the transmission screw, and the limiting slide is movably assembled on the guide column.

10. The intracavity probe according to any one of claims 1 to 4, characterized in that: The installation base is provided with a guide groove, the position-limiting slide is movably assembled in the guide groove, and the groove wall of the guide groove guides the position-limiting slide.

11. The intracavity probe according to any one of claims 1 to 4, characterized in that: The acoustic head shaft has a rotation angle range of not less than 720 degrees, the acoustic head shaft has a first rotation direction and a second rotation direction, the unidirectional rotation range of the acoustic head shaft in the first rotation direction is not less than 360 degrees, and the unidirectional rotation range of the acoustic head shaft in the second rotation direction is not less than 360 degrees.

12. The intracavity probe according to any one of claims 1 to 4, characterized in that: The maximum rotation angle range of the acoustic head rotation axis is 1080 degrees.

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