Intracavity probe

Abstract

The utility model relates to the field of ultrasonic probes, in particular to an intracavity probe. An intracavity probe comprises: a sound head assembly, the sound head assembly comprises a sound head rotating shaft and an ultrasonic transducer, and the ultrasonic transducer is arranged on the sound head rotating shaft; the sound head rotating shaft is rotationally assembled on the mounting base body; the driving unit is connected with the sound head rotating shaft so as to drive the sound head assembly to rotate around the axis of the sound head rotating shaft, and the sound head rotating shaft has a rotating angle range not smaller than 360 degrees; the limiting assembly comprises a traction rope and a rope winding part arranged on the sound head rotating shaft, the two ends of the traction rope in the length direction are connected to the rope winding part and the installation base body respectively, the traction rope is used for being wound around the rope winding part along with rotation of the sound head rotating shaft, the traction rope has the set length, and the set length is used for limiting the rotation angle range of the rope winding part; therefore, the maximum rotation angle of the sound head rotating shaft is limited. 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 limiting component, the limiting component includes a pulling rope and a rope winding part arranged on the sound head rotating shaft, the two ends of the pulling rope in the length direction are respectively connected to the rope winding part and the mounting base, the pulling rope is used to be wound around the rope winding part as the sound head rotating shaft rotates, the pulling rope has a set length, and the set length is used to limit the rotation angle range of the rope winding part to limit the maximum rotation angle of the sound head rotating shaft.

[0012] In one embodiment, a limiting protrusion is provided on the acoustic head shaft. The limiting protrusion is distributed along the axial direction of the acoustic head shaft. The limiting protrusion is used to define a winding area on the acoustic head shaft for the pulling rope to be wound.

[0013] In one embodiment, the limiting protrusion is formed by an annular piece provided on the acoustic head rotation shaft.

[0014] In one embodiment, a tensioning structure is included, wherein the tensioning structure is used to keep the pulling rope in tension before being straightened.

[0015] In one embodiment, the tensioning structure includes a tensioning member, which has a fixed end and a free end. The fixed end is arranged on the mounting base, and the free end is provided with a sliding seat, which is used to support the traction rope and allow the traction rope to slide; the free end can enable the sliding seat to support the traction rope under the action of elastic force, so that the traction rope is tensioned.

[0016] In one embodiment, the tensioning member is a tension spring.

[0017] In one embodiment, the tensioning member includes a swing rod, an elastic member is provided between the swing rod and the mounting base, and a connection point between the elastic member and the swing rod is spaced apart from a free end of the swing rod.

[0018] In one embodiment, a protrusion is provided on the mounting base, and the corresponding end of the pulling rope is fixed on the protrusion.

[0019] In one embodiment, the pulling rope is fixedly connected to the mounting base or the rope winding part by at least one connection method selected from the group consisting of a rope buckle, a crimping piece, bonding, and welding.

[0020] In one embodiment, the acoustic head shaft can achieve 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.

[0021] In one embodiment, the maximum rotation angle range of the acoustic head axis is 1080 degrees.

[0022] Beneficial effects of the utility model:

[0023] The intracavity probe in the present invention is provided with a limiting component, which includes a pulling rope, wherein the two ends of the pulling rope in the length direction are respectively connected to the acoustic head shaft and the mounting base, and the pulling rope can be wound around the acoustic head shaft as the acoustic head shaft rotates. As the acoustic head shaft rotates, the winding amount of the pulling rope increases and the length of the unwound part decreases. According to the set length of the pulling rope, the rotation angle range of the rope winding part can be limited. When the unwound part of the pulling rope is straightened, the pulling rope can prevent the acoustic head shaft from rotating, thereby limiting the maximum rotation angle of the acoustic head shaft, and solving the technical problem that the rotation angle of the acoustic head shaft of the intracavity probe may be too large, resulting in damage to the probe.

[0024] Furthermore, by reasonably setting the length of the pulling rope, the acoustic head shaft can achieve an angular range of not less than 360 degrees, meeting the requirement of not less than 360 degrees of rotation of the acoustic head shaft when working. 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;

[0029] Figure 5 It is a structural diagram of the limit component;

[0030] Figure 6 This is a schematic diagram of the limiting principle of the pulling rope, and the double-dotted line in the figure represents the taut pulling rope;

[0031] Figure 7 is a structural schematic diagram of another embodiment of an intracavity probe;

[0032] Figure 8 The present invention is a schematic structural diagram of another embodiment of an intracavity probe.

[0033] List of feature names corresponding to the reference numerals in the figures:

[0034] 100, housing assembly; 110, handle housing; 120, probe housing; 121, acoustic window housing; 122, connection housing;

[0035] 200, shaft seat; 210, base end surface; 220, protrusion;

[0036] 300, acoustic head assembly; 310, acoustic head shaft; 311, mounting cavity; 312, transmission section; 313, position-limiting protrusion; 314, rope winding section; 320, ultrasonic transducer; 330, bearing;

[0037] 400, driving unit; 410, driving pulley; 420, driven pulley; 430, synchronous belt;

[0038] 500, traction rope;

[0039] 610, fixed end; 620, free end; 631, sliding seat; 632, guide groove; 641, swing rod; 642, elastic member; 643, support seat. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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).

[0043] In an embodiment of an intracavitary probe of the present invention, by providing a pulling rope and a rope winding portion, the pulling rope can be wound through the rope winding portion when the acoustic head assembly 310 rotates, and the winding amount limit of the pulling rope can be controlled by controlling the set length of the pulling rope. Different winding amount limits correspond to different rotation angle ranges of the acoustic head shaft 310, which can avoid the problem that when a stopping structure is directly provided on the acoustic head shaft 310, the size limitation of the stopping structure itself makes it impossible to adapt to a rotation range greater than 360 degrees of the acoustic head shaft 310.

[0044] An embodiment of an intracavity probe in the present utility model:

[0045] 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.

[0046] 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 in 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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 spindle 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 spindle seat 200.

[0053] The driving unit 400 may be a stepper motor or a servo motor, and is in transmission connection with the acoustic head shaft 310 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. Figure 4 As shown, 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 connected by a synchronous belt 430. This synchronous belt drive can achieve rotation of the acoustic head shaft 310 and accurately control the rotation angle. Those skilled in the art will appreciate that the transmission structure between the acoustic head shaft 310 and the drive unit 400 can also be replaced with other forms, such as a gear meshing transmission, and the number of gear stages can be arranged as needed.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] To effectively limit the rotation angle of the acoustic head assembly 300 when abnormal rotation occurs, the intracavity probe further includes a limit assembly. The limit assembly includes a pull rope 500 and a rope winding portion 314 disposed on the acoustic head shaft 310. The pull rope 500 has two ends connected to the rope winding portion 314 and the mounting base, respectively. The pull rope 500 is configured to be wound around the rope winding portion 314 as the acoustic head shaft 310 rotates. The pull rope 500 has a set length, which is used to limit the amount of the pull rope 500 that can be wound around the rope winding portion 314, thereby limiting the rotation angle range of the rope winding portion 314 and thus limiting the maximum rotation angle of the acoustic head shaft 310. The mounting base can be formed solely by the shaft base 200. In some other embodiments, it can also be formed jointly by the shaft base 200 and the handle housing 110, by the shaft base 200 and the probe housing 120, or by the shaft base 200, the probe housing 120, and the handle housing 110.

[0061] By setting the above-mentioned limit assembly, when the actual rotation angle of the acoustic head assembly 300 exceeds the set angle range, the pulling rope 500 is in a straightened state, which can prevent the acoustic head shaft 310 from continuing to rotate, thereby playing a mechanical limit role in the rotation of the acoustic head assembly 300, avoiding excessive rotation of the acoustic head assembly 300 and causing greater damage to related components in the intracavitary probe.

[0062] In some embodiments, please refer to Figure 5 and Figure 6 The acoustic head shaft 310 is provided with a limiting protrusion 313, which is distributed along the axial direction of the acoustic head shaft 310. The limiting protrusion 313 is used to define a winding area on the acoustic head shaft 310 for the pull rope 500 to be wound around. The winding area on the acoustic head shaft 310 forms a rope winding portion 314. Providing the limiting protrusion 313 to form the winding area can standardize the winding position of the pull rope 500, which helps to ensure the rope length corresponding to each winding turn of the rope, thereby helping to ensure the consistency of the number of windings of the pull rope 500 each time it is wound, and furthermore, can more accurately limit the rotation angle of the acoustic head shaft 310.

[0063] In a specific embodiment, the limiting protrusion 313 is formed by an annular sheet provided on the acoustic head shaft 310. The fixing method of the annular sheet and the acoustic head shaft 310 is not limited, for example, it can be fixed by welding or bonding. In addition, in some other embodiments, the limiting protrusion 313 can also be an annular groove provided on the outer peripheral surface of the acoustic head shaft 310, or a limiting ring with a thickness thicker than the annular sheet; in addition, a limiting sleeve can also be provided on the acoustic head shaft 310, and the limiting sleeve is fixedly connected to the acoustic head shaft 310, and the rope winding portion 314 can be provided on the limiting sleeve. In some other embodiments, the rope winding portion can also be in other forms, for example, directly formed by the outer peripheral surface of the acoustic head shaft 310, and no other additional structures are required to be provided on the acoustic head shaft 310 except for the structure for connecting the pulling rope 500.

[0064] Because the pull cord 500 relies on its own tension to limit the rotation of the acoustic head shaft 310, to improve the accuracy of the angle limit of the acoustic head shaft 310, the pull cord 500 should have a higher tensile strength than others. This prevents the pull cord 500 from deforming significantly when under tension, which could cause the rotation angle of the acoustic head shaft 310 to exceed the predetermined limit. For example, the pull cord 500 can be made of nylon, high molecular weight polyethylene fiber, Kevlar, steel wire, etc. For situations where the angle limit accuracy is lower, the pull cord 500 can be replaced with other materials, and those skilled in the art can make a choice based on specific needs.

[0065] To facilitate connection between the pull cord 500 and the mounting base, in one embodiment, a protrusion 220 is provided on the mounting base, to which the respective ends of the pull cord 500 are fixed. The protrusion 220 can be a column, which has a simple structure and is easy to form. The pull cord 500 can be fixed to the mounting base or the cord-wrap portion 314 of the acoustic head shaft 310 in any manner, for example, by at least one of a cord lock, a crimping member, bonding, and welding.

[0066] Those skilled in the art will appreciate that a cord lock can take various forms, any of which can form a loop for looping the pull cord 500 onto the protruding column. For example, the cord lock itself can form a loop and can be connected to the pull cord 500 in various ways. The cord lock can include a U-shaped bolt and a support plate, with a fixing hole formed between the U-shaped bolt and the support plate. This can compress a bent portion of the end of the pull cord 500 alongside an adjacent portion, thereby forming a ring-shaped structure at the end of the pull cord 500. The crimping member can be a screw, a pressure block, a pressure plate, etc., and can directly press the pull cord 500 against the mounting base or the cord winding portion 314.

[0067] The pull cord 500 can easily accommodate the rotation angle of the acoustic head shaft 310 exceeding 360 degrees. However, if the pull cord 500 is connected only to the winding portion 314 and the mounting base at both ends, the pull cord 500 will become slack before being tightened, which is detrimental to the reliable operation of the position limiting assembly. To better utilize the pull cord 500 to achieve a position limiting effect, in some embodiments, the pull cord 500 can be connected to an elastic tensioning structure to maintain tension in the pull cord 500 before being straightened.

[0068] In some other embodiments, the elastic tensioning structure may include a reel rotatably mounted on a mounting base, with a coil spring disposed between the reel and the mounting base. One end of the pull cord 500 is secured to the reel, thereby maintaining tension via the coil spring. The specific structure of the reel and coil spring can be referenced to related art for automatically retracting tape measures and will not be further described here.

[0069] In some other embodiments, the tensioning structure may include a tensioning member having a fixed end 610 and a free end 620. The fixed end 610 is disposed on the mounting base, and the free end 620 is provided with a sliding seat 631. The sliding seat 631 is used to support the traction rope 500 and allow the traction rope 500 to slide. The free end 620 can enable the sliding seat 631 to support the traction rope 500 under the action of elastic force, so as to tension the traction rope 500. Please refer to Figure 7 The rotating shaft seat 200 constituting the mounting base can be provided with a guide groove 632, within which a slider can be disposed. The slider moves along the guide groove 632, and the sliding seat 631 can be a pulley fixed to the slider. The pull rope 500 can be supported in a groove on the outer circumference of the pulley, which helps reduce wear on the pull rope 500. Furthermore, the slider can be connected to a tension spring (not shown), which applies an elastic force to the slider to maintain the tension of the pull rope 500. To prevent interference between the tension spring and the pull rope 500, the tension spring can be disposed on the distal end of the mounting base.

[0070] Please refer to Figure 8 In another embodiment, the tensioning member includes a swing rod 641, the fixed end 610 of which is rotatably assembled on the rotating shaft seat 200. The free end 620 of the swing rod 641 is provided with a support seat 643 for supporting the pulling rope 500, and the support seat 643 can be a pulley. An elastic member 642 is provided between the swing rod 641 and the mounting base. The connection point between the elastic member 642 and the swing rod 641 is spaced apart from the free end 620 of the swing rod 641. In this way, it can continuously provide elastic force to the swing rod 641 with a large stroke with a small deformation, thereby tightening the pulling rope 500. The above-mentioned elastic member 642 can be a tension spring, a compression spring, or a torsion spring. Those skilled in the art can select the corresponding installation structure according to the different types of elastic members 642, and no detailed description is given here.

[0071] 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. When the acoustic head shaft 310 rotates, the rope winding portion 314 can wind the traction rope 500, so that the portion of the traction rope 500 located between the rope winding portion 314 and the shaft seat 200 gradually shortens. When the transmission screw accidentally rotates to exceed the set rotation angle range, for example, exceeding 1 degree (which can be increased or decreased as needed), the traction rope 500 will be tightened, and the acoustic head shaft 310 will not be able to continue to rotate, thereby achieving the limit of the acoustic head shaft 310. By adjusting the set length of the traction rope 500, the rotation requirements of the acoustic head shaft 310 at different angles can be met. Of course, in some other embodiments, the above-mentioned limit assembly can also be applied to situations where the rotatable range of the acoustic head assembly 300 is greater than or equal to 360 degrees and less than 720 degrees.

[0072] 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 limiting component, the limiting component includes a pulling rope and a rope winding part arranged on the sound head rotating shaft, the two ends of the pulling rope in the length direction are respectively connected to the rope winding part and the mounting base, the pulling rope is used to be wound around the rope winding part as the sound head rotating shaft rotates, the pulling rope has a set length, and the set length is used to limit the rotation angle range of the rope winding part to limit the maximum rotation angle of the sound head rotating shaft.

2. The intracavity probe according to claim 1, wherein: The acoustic head shaft is provided with a limiting convex portion, which is distributed along the axial direction of the acoustic head shaft. The limiting convex portion is used to define a winding area on the acoustic head shaft for the pulling rope to be wound.

3. The intracavity probe according to claim 2, wherein: The limiting protrusion is formed by an annular piece arranged on the acoustic head rotation shaft.

4. The intracavity probe according to any one of claims 1 to 3, characterized in that: A tensioning structure is included, and the tensioning structure is used to keep the pulling rope with tension before being straightened.

5. The intracavity probe according to claim 4, wherein: The tensioning structure includes a tensioning member, which has a fixed end and a free end. The fixed end is arranged on the mounting base, and the free end is provided with a sliding seat, which is used to support the traction rope and allow the traction rope to slide; the free end can enable the sliding seat to support the traction rope under the action of elastic force, so as to tension the traction rope.

6. The intracavity probe according to claim 5, wherein: The tensioning member is a tension spring.

7. The intracavity probe according to claim 5, wherein: The tensioning member includes a swing rod, an elastic member is provided between the swing rod and the mounting base, and a connection point between the elastic member and the swing rod and a free end of the swing rod is spaced apart.

8. The intracavity probe according to any one of claims 1 to 3, characterized in that: The mounting base is provided with a protrusion, and the corresponding end of the pulling rope is fixed on the protrusion.

9. The intracavity probe according to any one of claims 1 to 3, characterized in that: The pulling rope is fixedly connected to the installation base or the rope winding part through at least one connection method selected from the group consisting of a rope buckle, a crimping piece, bonding, and welding.

10. The intracavity probe according to any one of claims 1 to 3, characterized in that: The acoustic head shaft can achieve 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. The unidirectional rotation range of the acoustic head shaft in the second rotation direction is not less than 360 degrees.

11. The intracavity probe according to any one of claims 1 to 3, characterized in that: The maximum rotation angle range of the acoustic head rotation axis is 1080 degrees.

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