Ultrasonic endoscope

Abstract

The invention provides an ultrasonic endoscope which can stably and reliably limit a clamp lifting device through a simple clamp lifting structure. Comprising an ultrasonic transducer arranged on the front end side of the head end part; a rotating shaft part capable of rotating around a rotating shaft; a forceps lifter disposed on the head end portion and closer to the base end side of the head end portion with respect to the ultrasonic transducer, the forceps lifter being connected to one end of the rotating shaft portion so as to rotate integrally with the rotating shaft portion; the rotating arm and the rotating shaft part are connected to the other end of the rotating shaft part in an integrated rotating mode, and a concave part is arranged on the side, away from the rotating shaft part, of the rotating arm; the traction part is fixedly connected with a fixed rod, the fixed rod is inserted into the concave part to be connected with the rotating arm, the rotating arm is dragged to rotate, the fixed rod can move in the concave part, and when the rotating arm rotates to a preset upper limit position or a preset lower limit position, the fixed rod abuts against the end of the concave part to limit further rotation of the rotating arm.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an ultrasonic endoscope. Background Art

[0002] As an important tool in modern medicine, endoscopes can be inserted into the body through natural holes or tiny incisions to perform various inspections and minimally invasive surgeries. Generally speaking, an endoscope includes an insertion portion that is inserted into the human body and an operating portion that operates the insertion portion, and a head portion is fixed at the top of the insertion portion. The head portion includes an end seat and components such as a camera portion and a lighting portion installed on the end seat.

[0003] In addition, in endoscopes such as duodenoscopes and ultrasonic endoscopes, the end seats are also equipped with a forceps lifting mechanism. The forceps lifting mechanism can change the direction of the diagnostic and treatment instruments entering through the instrument channel of the insertion part, such as the direction of travel of biopsy forceps, stone removal baskets, and incision knives. Taking the ultrasonic endoscope as an example, the doctor only needs to turn the forceps lifting knob on the operating part to control the direction in which the diagnostic and treatment instruments such as biopsy needles extend from the instrument channel. Under the guidance of the ultrasonic image, the posture of the instrument is adjusted to reach the target area of ​​the lesion and avoid blood vessels, which greatly improves the accuracy, safety and efficiency of the operation.

[0004] In addition, for the convenience of cleaning and disinfection, in an endoscope with a forceps lifting mechanism, the forceps lifting device and the traction mechanism that drives the forceps lifting device to rotate are separated into two independent spaces. For example, in patent document CN105982635B, the erection platform (i.e., the forceps lifting device) is accommodated in the erection platform accommodation slit, and the erection platform erection rod (i.e., the traction mechanism) is accommodated in the erection rod accommodation chamber, and the erection platform accommodation slit and the erection rod accommodation chamber are separated by a partition wall. As a result, the erection rod accommodation chamber and the traction channel of the traction mechanism will not be exposed to the human body and will not be contaminated, which can reduce the work of cleaning and disinfection and reduce the risk of cross infection.

[0005] However, in patent document CN105982635B, a limiter mechanism for limiting the rotation of the clamp lifter is provided in the operating part, and the operating part is connected to the clamp lifter through a traction mechanism such as a long steel wire rope. When the clamp lifter is limited to a preset upper limit position or a lower limit position, if the clamp lifter is limited only by the limiter mechanism provided in the operating part, the clamp lifter will have displacement deviation in the stroke, so the clamp lifter cannot stably realize accurate lifting / lowering action within the upper and lower limit positions.

[0006] On the other hand, if a limiting mechanism is provided in the installation space of the forceps lifter at the head end, although the forceps lifter can be limited stably, it will make the structure of the head end more complicated, increase the blind spots for cleaning, and pose a risk of cross infection. Summary of the invention

[0007] In view of this, in order to solve at least one problem existing in the above-mentioned prior art, the present invention proposes an ultrasonic endoscope, the purpose of which is to be able to stably and reliably limit the position of the forceps lifter through a simple structure.

[0008] In order to achieve the above-mentioned object, one embodiment of the present invention is an ultrasonic endoscope, comprising: a tip portion provided on the front end side of an insertion portion, characterized in that it comprises:

[0009] An ultrasonic transducer, which is arranged on the front end side of the head end; a rotating shaft, which can rotate around the rotating shaft; a forceps lifter, which is arranged on the head end and closer to the base end side of the head end relative to the ultrasonic transducer, and is connected to one end of the rotating shaft in a manner of rotating integrally with the rotating shaft; a rotating arm, which is connected to the other end of the rotating shaft in a manner of rotating integrally with the rotating shaft, and is provided with a recessed portion on the side away from the rotating shaft; a traction portion, which is fixedly connected to a fixing rod, and is connected to the rotating arm by inserting the fixing rod into the recessed portion, so as to pull the rotating arm to rotate, and the fixing rod can move in the recessed portion. When the rotating arm rotates to a preset upper limit position or a lower limit position, the fixing rod abuts against the end of the recessed portion to limit further rotation of the rotating arm.

[0010] Preferably, the recessed portion is parallel to a plane defined by an axis of the fixing rod and the rotation axis.

[0011] Preferably, the rotating arm has a first arm portion, a second arm portion and a third arm portion, the first arm portion is fixedly connected to the rotating shaft portion, the second arm portion is located on one side of the forceps lifter relative to the first arm portion, and the third arm portion connects the first arm portion and the second arm portion.

[0012] Preferably, the traction part is provided with a push rod, and the top end of the push rod is fixedly connected to the fixing rod.

[0013] Preferably, the push rod is provided with two claws protruding from the top end of the push rod, the two claws are opposite to each other with a gap between them, the rotating arm is provided with a fixing portion, the fixing portion is provided with the recessed portion, the fixing rod passes through the recessed portion inserted into the gap, and both ends are fixedly connected to the two claws respectively.

[0014] Preferably, a protrusion is provided on the outer side surface of the rotating arm, and the top end of the protrusion is located on the straight line where the rotating axis is located.

[0015] Preferably, the head end of the ultrasonic endoscope also has a partition wall, which separates the space where the forceps lifter is located from the space where the rotating arm is located, and the partition wall is provided with a boss. The rotating shaft passes through a through hole that passes through the boss and the partition wall and is fixedly connected to the forceps lifter, and a first sealing component is provided in the through hole.

[0016] Preferably, the forceps lifter is provided with a notch, the boss extends to the inside of the notch, and a second sealing component is provided in the notch.

[0017] Preferably, the forceps elevator has an abutment surface for abutting against the treatment instrument; a center plane passing through the geometric center of the ultrasonic transducer coincides with a projection of the center plane of the abutment surface along its length direction along the length axis direction of the insertion portion.

[0018] Preferably, when the rotating arm rotates to a preset upper limit position, its rotation angle relative to the axis of the head end is not less than 15°, and when the rotating arm rotates to a preset lower limit position, its rotation angle relative to the axis of the head end is not more than 85°.

[0019] According to the ultrasonic endoscope of the present invention, when the rotating arm rotates to a preset upper limit position or a lower limit position, the fixing rod fixed on the traction part interferes with the recessed part provided on the rotating arm to prevent the rotating arm from rotating further, thereby limiting the position of the forceps lifter. Thus, the limiting mechanism can be set at the end of the endoscope head to reduce the stroke error of the forceps lifter during the lifting and falling process when limiting; and, using the connection structure of the traction part and the rotating arm as the limiting mechanism can avoid adding features or parts to the head end, further simplify the structure of the head end, reduce the cleaning dead angle of the forceps lifter installation space, and prevent cross infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a perspective view of an example of an end portion of an endoscope head according to the present invention.

[0022] Figure 2 It is a schematic diagram of the end of the endoscope lens when the rotating arm is in the lower limit position.

[0023] Figure 3 Schematic diagram of the end of the endoscope head when the rotating arm is in the middle position.

[0024] Figure 4 It is a schematic diagram of the end of the endoscope head when the rotating arm is in the upper limit position.

[0025] Figure 5 It is a three-dimensional view of the rotating arm in the end of the endoscope head in the present invention.

[0026] Figure 6 It is a cross-sectional view of the end portion of the endoscope head of the present invention along the rotation axis of the rotation shaft portion.

[0027] Figure 7 This is a cross-sectional view of another example of the end portion of the endoscope head according to the present invention, taken along the rotation axis of the rotation shaft portion.

[0028] Figure 8 This is a perspective view of another example of the end portion of the endoscope head of the present invention.

[0029] Fig. 9 for Figure 8 Magnified view of area A.

[0030] Fig.10 This is a perspective view of an example of an end portion of an endoscope head according to the present invention.

[0031] 1. Ultrasonic transducer; 11. Cable; 2. End seat; 21. Boss; 22. Side cover; 23. First sealing member; 24. Second sealing member; 25. Illumination unit; 26. Observation unit; 3. Rotation shaft; 4. Lifter; 41. Abutment surface; 5. Rotation arm; 51. Recessed portion; 52. Protrusion; 53. First arm; 54. Second arm; 55. Third arm; 56. Fixing unit; 6. Partition wall; 7. Traction unit; 71. Push rod; 72. Claw; 8. Fixing rod; 9. Spring tube. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the technical solutions of the present disclosure are clearly and completely described below in conjunction with the drawings in the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] The ultrasonic endoscope has an insertion portion and an operating portion for operating the insertion portion. An end seat is provided at the top of the insertion portion, and a forceps lifting mechanism is provided at the instrument channel opening of the end seat. The operating portion operates the traction portion of the forceps lifting mechanism to make the forceps lifting device of the forceps lifting mechanism stand up or lie down (i.e., rotate), thereby changing the travel direction of the instrument entering from the instrument channel.

[0034] Hereinafter, the ultrasonic endoscope having the forceps lifting mechanism according to the present invention will be described in detail with reference to the accompanying drawings.

[0035] like Figure 1 As shown, in the ultrasonic endoscope, there is an insertion portion, a head portion arranged on the front end side of the insertion portion, an end seat 2 in the head portion, and an ultrasonic transducer 1 installed on the top end of the end seat 2, and the head portion is arranged on the front end side of the insertion portion of the endoscope. The head portion has: and an illumination portion 25, which irradiates the illumination light transmitted by the light source device through the light guide tube inside the endoscope 1 to the observed part, etc., and an observation portion 26, which photographs the observed part in the body and sends the photographed image as an observation image (endoscopic image) to the processor device. The ultrasonic transducer 1 is connected to the processor device via a cable 11 (refer to Figure 6 , Figure 7 The forceps lifting mechanism is installed on the end seat 2, and mainly includes a rotating shaft 3, a forceps lifting device 4, a rotating arm 5 and a traction part 7.

[0036] In addition, for the tip portion, the position on the longitudinal axis direction of the insertion portion and the tip side is referred to as the front side (tip side), and the position on the opposite side is referred to as the rear side (base side).

[0037] The ultrasonic transducer 1 is provided on the front end side of the tip portion, and the observation portion and the illumination portion are provided at positions closer to the base end side of the tip portion relative to the tip portion.

[0038] The rotating shaft 3 can rotate around the rotating shaft. The forceps lifter 4 is connected to one end of the rotating shaft 3 in a manner that it rotates integrally with the rotating shaft 3. The rotating arm 5 is connected to the other end of the rotating shaft 3 in a manner that it rotates integrally with the rotating shaft 3. In this way, the forceps lifter 4 and the rotating arm 5 are fixedly connected to both ends of the rotating shaft 3, respectively, and the three can rotate integrally.

[0039] like Figure 1 As shown, the rotating shaft 3 and the rotating arm 5 are integrally formed to reduce the number of parts and the workload of assembly. However, the rotating shaft 3 and the clamp lifting device 4 can also be integrally formed, or the rotating shaft 3, the clamp lifting device 4, and the rotating arm 5 can be independent of each other and connected by means of threads, welding, etc.

[0040] The traction part 7 is connected to the rotating arm 5, and pulls the rotating arm 5 to rotate, thereby driving the rotating shaft 3 and the forceps lifting device 4 to rotate. In addition, the traction part 7 is connected to the operating part through the insertion part of the endoscope under the protection of the spring tube 9, and pulls the rotating arm 5 to rotate under the operation of the operating part. The traction part 7 can be a traction member commonly used in the art, such as a wire rope.

[0041] In the present invention, a recessed portion 51 is further provided on the rotating arm 5 at a side away from the rotating shaft portion 3. In addition, a fixing rod 8 is fixedly connected to the traction portion 7 by welding or the like. The traction portion 7 is connected to the rotating arm 5 by inserting the fixing rod 8 into the recessed portion 51.

[0042] The recessed portion 51 may be a groove, a concave hole, etc. having an elongated shape. The fixing rod 8 can move in the recessed portion 51 in the length direction of the recessed portion 51 .

[0043] Reference Figure 2-Figure 4 , the process of the traction unit 7 pulling the rotating arm 5 to rotate is described.

[0044] like Figure 2 As shown, when the rotating arm 5 rotates downward (counterclockwise in the figure) to a preset lower limit position, the fixing rod 8 abuts against the end of the recessed portion 51, and the downward movement of the traction portion 7 and the rotation of the rotating arm 5 interfere with each other due to the abutment. The traction portion 7 cannot be pulled downward, thereby limiting the rotating arm 5 from further rotating downward.

[0045] Then, if Figure 3 As shown, when the operating part operates the traction part 7, the traction part 7 pushes the rotating arm 5 to rotate upward from the lower limit position (clockwise in the figure), or the traction part 7 pulls the rotating arm 5 to rotate downward from the upper limit position (counterclockwise in the figure), the fixing rod 8 moves from the end of the recessed part 51 to the middle of the recessed part 51, eliminating the motion interference, so that the rotating arm 5 can rotate.

[0046] like Figure 4 As shown, when the rotating arm 5 rotates upward (clockwise in the figure) to a preset upper limit position, the fixing rod 8 abuts against the end of the recessed portion 51 again, and the upward movement of the traction portion 7 and the rotation of the rotating arm 5 interfere with each other due to the abutment. The traction portion 7 cannot be pushed upward, thereby limiting the further upward rotation of the rotating arm 5.

[0047] That is, in the present invention, when the rotating arm 5 rotates to the preset upper limit position or lower limit position, the upper limit position or the lower limit position can be designed as needed, for example, with the rotation range of the forceps lifting device 4 relative to the axis of the end of the endoscope lens as

[0048] [15°, 85°] are used to set the upper limit position and the lower limit position of the rotating arm 5. The angle setting of the upper limit position ensures that when the treatment instrument (biopsy needle, etc.) passes through the outlet of the treatment instrument channel normally, the abutment surface 41 of the lifting forceps will not interfere with the treatment instrument (biopsy needle, etc.). The angle setting of the lower limit position can ensure that the soft sheath can be clamped by the lifting forceps 4 and the end seat 2, while the deformation of its internal channel will not affect the passage of the internal treatment instrument. The fixing rod 2 abuts against the end of the recessed portion 51 to limit the further rotation of the rotating arm 5. In this way, the rotation of the lifting forceps 4 can be limited.

[0049] For example, the rotation range of the forceps lifter 4 is set to (0°~90°) relative to the axis of the end of the endoscope lens to set the upper limit position and the lower limit position of the rotating arm 5 to prevent excessively large angles from causing the soft sheath of the treatment instrument (biopsy needle, etc.) to deform, resulting in the treatment instrument (biopsy needle, etc.) not being able to come out of the soft sheath smoothly.

[0050] Therefore, according to the lifting structure of the ultrasonic endoscope of the present invention, the limit mechanism can be set at the head end of the endoscope, reducing the stroke error of the lifting device during the lifting and falling process when limiting, and preventing the lifting device from shaking when limiting; and it can simplify the structure of the head end, reduce the cleaning dead corners of the space where the lifting device is installed, and prevent cross infection. The hard end length of the head end does not exceed 36mm, ensuring a compact structural layout, which is suitable for scenes with limited space such as an ultrasonic transducer set on the front side of the head end and entering the body cavity at the same time.

[0051] In addition, the upper limit position and the lower limit position of the rotation of the rotating arm 5 can be pre-set according to the lifting range of the forceps lifting device 4, and the length of the recessed portion 51 can be set according to the rotation stroke of the forceps lifting device 4. Figure 2 as well as Figure 4 In the embodiment, the fixing rod 8 abuts against the same end of the recessed portion 51 , but according to different structures, when the rotating arm 5 rotates to the preset upper limit position and the lower limit position, the fixing rod 8 can also abut against different ends of the recessed portion 51 .

[0052] In addition, if Figure 2-Figure 4 As shown, the recessed portion 51 is parallel to the plane defined by the axis of the fixed rod 8 and the rotation axis of the rotation shaft portion 3. Specifically, the length direction of the recessed portion 51 is parallel to the plane defined by the axis of the fixed rod 8 and the rotation axis of the rotation shaft portion 3. Figure 3 In the middle position, the length direction of the recessed portion 51 is perpendicular to the movement direction of the traction portion 7, and the force applied by the traction portion 7 to the rotating arm 5 is completely converted into the force for rotating the rotating arm 5. Therefore, during the rotation of the rotating arm 5, the force applied by the fixing rod 8 to the recessed portion 51 can be converted into the force for pushing the rotating arm 5 to rotate in a larger proportion, thereby reducing the force required to operate the traction portion 7 and improving the operability of the forceps lifting mechanism of the ultrasonic endoscope.

[0053] Reference Figure 5-Figure 6 , the rotating arm 5 in the present invention is described in detail.

[0054] like Figure 5-Figure 6 As shown, the rotating arm 5 has a first arm portion 53, a second arm portion 54 and a third arm portion 55. The first arm portion 53 is fixedly connected to the rotating shaft portion 3. The third arm portion 55 connects the first arm portion 53 and the second arm portion 54. Figure 6 As shown, the second arm portion 54 is located at one side of the forceps lifting device 4 relative to the first arm portion 53. A fixing portion 56 is provided below the second arm portion 54, and a recessed portion 51 is provided on the fixing portion 56. Of course, the recessed portion 51 can also be directly provided on the second arm portion 54.

[0055] That is, by arranging the second arm portion 54 radially inwardly of the end of the endoscope head relative to the first arm portion 53, the length of the second arm portion 54 can be extended. Without increasing the size of the end of the endoscope head, the length of the rotating arm 5 can be lengthened to increase the torque, reduce the force required to operate the traction portion 7, and improve the operability of the forceps lifting mechanism of the ultrasonic endoscope.

[0056] like Figure 5 As shown, a protrusion 52 is further provided on the outer side of the rotating arm 5. The top of the protrusion 52 is located on the straight line where the rotating axis of the rotating shaft portion 3 is located. Therefore, when the rotating arm 5 accidentally contacts the side cover 22 fixed on the end seat 2, only the top of the protrusion 52 makes point contact with the side cover 22, which can reduce the friction between the rotating arm 5 and the side cover 22 and prevent the rotating arm 5 from getting stuck.

[0057] In addition, in order to improve the sealing performance between the space where the lifting forceps 4 is located and the space where the rotating arm 5 is located, in the present invention, Figure 1 , Figure 6 As shown, a boss 21 may also be provided on the end seat 2. Specifically, the boss 21 is provided on the partition wall 6, and the partition wall 6 separates the space where the lifting forceps 4 is located from the space where the rotating arm 5 is located. Figure 6 In the embodiment, the boss 21 is arranged on one side of the rotating arm 5 , but it can also be arranged on one side of the forceps lifting device 4 , or the boss 21 can be arranged on both sides of the partition wall 6 .

[0058] like Figure 6 As shown, the rotating shaft 3 passes through the through hole that penetrates the boss 21 and the partition wall 6 and is fixedly connected to the forceps lifting device 4. A first sealing member 23 is arranged in the through hole.

[0059] By setting the boss 21, the sealing length between the space where the lifting clamp 4 is located and the space where the rotating arm 5 is located can be extended, and larger and more first sealing components can be set for sealing to improve the sealing effect, which can prevent the space where the lifting clamp 4 is located from entering the space where the rotating arm 5 is located, and then entering the traction channel where the traction part 7 is located.

[0060] Reference Figure 7 , another example of the end portion of the endoscope lens in the present invention is described.

[0061] In the end of the endoscope head of this example, Figure 7 As shown, the forceps lifter 4 is provided with a notch, the boss 21 extends to the inside of the notch, and a second sealing member 24 is also provided in the notch.

[0062] In this way, the thickness of the boss 21 can be further increased, thereby further increasing the sealing area between the rotating arm 5 and the lifting clamp 4 in the end seat 2, and more sealing components (for example, the second sealing component 24) can be provided, further reducing the risk of sealing failure.

[0063] Continue to see 6 and Figure 7 The cross section of the end seat 2 includes an ultrasonic cable 11 for connecting the ultrasonic transducer 1 and a clamp lifting mechanism of the clamp lifting device 4, which are arranged in parallel and arranged in parallel along the plane where the length axis of the insertion portion is located. Such an arrangement makes more effective use of the space of the end seat 2, allowing more components to be compactly arranged at the end of the endoscope head, reducing the interference of the operation of the clamp lifting device 4 on the ultrasonic imaging, thereby improving the imaging quality.

[0064] Next, refer to Figure 8 , Fig. 9 , another example of the forceps lifting mechanism of the ultrasonic endoscope of the present invention is described.

[0065] In the forceps lifting mechanism of the ultrasonic endoscope in this example, a push rod 71 is also fixedly connected to the top of the traction part 7. The push rod 71 is fixedly connected to the traction part 7 by welding or the like, and is fixedly connected to the fixing rod 8. Thus, by pushing the rotating arm 5 to rotate by the push rod 71, the movement of the traction part 7 can be limited in the axial direction of the end of the endoscope head, and when the rotating arm 5 rotates to a preset upper limit position or a lower limit position, the rotation of the rotating arm 5 can be reliably limited.

[0066] Specifically, if Fig. 9 As shown, the push rod 71 is provided with two claws 72 protruding from the top of the push rod 71, and the two claws 72 are opposite to each other with a gap therebetween. The recessed portion 51 provided on the fixing portion 56 of the rotating arm 5 is inserted into the gap between the two claws 72, and the fixing rod 8 passes through the recessed portion 51, and the two ends are respectively fixedly connected with the two claws 72 by means of threads, welding, etc.

[0067] Thus, the reliability of the connection between the traction part 7 and the rotating arm 5 can be improved, and the connection failure between the traction part 7 and the rotating arm 5 can be prevented. Furthermore, the fixing part 56 of the rotating arm 5 is located between the two claws 72 of the push rod 71, and the push rod 71 will not be eccentric when pushing the rotating arm 5, and the traction part 7 can push the rotating arm 5 more stably, that is, the forceps lifting device 4 can rotate more stably.

[0068] like Fig.10 As shown, the forceps lifter 4 has an abutment surface 41 that abuts against the treatment instrument; the center plane that passes through the geometric center of the ultrasonic transducer 1 coincides with the projection of the center plane of the abutment surface 41 along its length direction in the direction of the length axis of the insertion portion. This arrangement makes it possible for the treatment instrument path extending through the guide surface 41 of the forceps lifter 4 to be perpendicular or nearly perpendicular to the scanning surface of the ultrasonic transducer, so that the treatment instrument can be almost aligned with the center line of the fan-shaped scanning surface of the ultrasonic transducer 1. It ensures that the treatment instrument can accurately reach the target site within the fan-shaped scanning surface generated by the ultrasonic transducer 1, and at the same time makes the treatment instrument (such as a biopsy needle, etc.) reach the target site consistent with the distance from the target site measured by ultrasound, which can avoid the distance measurement error caused by the deviation of the treatment instrument path.

[0069] Another embodiment of the present invention provides an ultrasonic endoscope having an endoscope head portion described in any of the above embodiments, and having the same beneficial technical effects as the above endoscope head portion.

[0070] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0071] It is further understood that, although the operations are described in a specific order in the accompanying drawings in the embodiments of the present invention, it should not be understood as requiring the operations to be performed in the specific order or serial order shown, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents, or make different combinations of the above technical features. However, these modifications, replacements and combinations do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultrasonic endoscope comprising a tip portion provided on the front end side of an insertion portion, characterized in that: include: an ultrasonic transducer disposed at the front end side of the head end portion; A rotating shaft portion, which is arranged at the head end portion and can rotate around the rotating shaft; A forceps lifter, which is arranged at the tip end portion and closer to the base end side of the tip end portion relative to the ultrasonic transducer, and is connected to one end of the rotating shaft portion in a manner of rotating integrally with the rotating shaft portion; A rotating arm, which is connected to the other end of the rotating shaft portion in a manner of rotating integrally with the rotating shaft portion, and is provided with a recessed portion on a side away from the rotating shaft portion; The traction part is fixedly connected with a fixing rod, and the fixing rod is inserted into the recessed part to connect with the rotating arm. When the traction part reciprocates, the rotating arm is pulled to rotate, and the fixing rod can move in the recessed part. When the rotating arm rotates to a preset upper limit position or a lower limit position, the fixing rod abuts against the end of the recessed portion to limit further rotation of the rotating arm.

2. The ultrasonic endoscope according to claim 1, characterized in that: The recessed portion is parallel to a plane defined by an axis of the fixing rod and the rotation axis.

3. The ultrasonic endoscope according to claim 1, characterized in that: The rotating arm comprises a first arm portion, a second arm portion and a third arm portion, The first arm portion is fixedly connected to the rotating shaft portion, The second arm portion is located at one side of the forceps lift relative to the first arm portion, The third arm connects the first arm and the second arm.

4. The ultrasonic endoscope according to claim 1, characterized in that: The traction part is provided with a push rod, and the top end of the push rod is fixedly connected to the fixing rod.

5. The ultrasonic endoscope according to claim 4, characterized in that: The push rod is provided with two claws protruding from the top end of the push rod, and the two claws are opposed to each other with a gap therebetween. The rotating arm is provided with a fixing portion, and the fixing portion is provided with the recessed portion, The fixing rod passes through the recessed portion inserted into the gap, and both ends are fixedly connected to the two claws respectively.

6. The ultrasonic endoscope according to claim 1, characterized in that: The outer side surface of the rotating arm is provided with a protrusion. The top end of the protrusion is located on the axis of the rotating shaft.

7. The ultrasonic endoscope according to claim 1, characterized in that: The forceps lifting device has an abutment surface abutting against the treatment instrument; A center plane passing through the geometric center of the ultrasonic transducer coincides with a projection of the center plane of the abutting surface along its length direction in the direction along the length axis of the insertion portion.

8. The ultrasonic endoscope according to claim 1, characterized in that: The head end portion also has a partition wall, which separates the space where the forceps lifter is located from the space where the rotating arm is located. The partition wall is provided with a boss, and the rotating shaft passes through a through hole penetrating the boss and the partition wall and is fixedly connected to the forceps lifting device. A first sealing member is disposed in the through hole.

9. The ultrasonic endoscope according to claim 8, characterized in that: The forceps lifter is provided with a notch, and the boss extends to the inside of the notch. A second sealing component is arranged in the notch.

10. The ultrasonic endoscope according to claim 1, characterized in that: When the rotating arm rotates to a preset upper limit position, its rotation angle relative to the axis of the head end is not less than 15°, and when the rotating arm rotates to a preset lower limit position, its rotation angle relative to the axis of the head end is not more than 85°.

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