A front-end component, an insertion portion, and an endoscope

Abstract

The present invention discloses a front-end component, an insertion part and an endoscope, belonging to the technical field of endoscopes. The front-end component includes a front-end seat, a passive part and a piezoelectric sheet; the front-end seat has an instrument channel; the passive part is in an annular structure, the passive part has a connecting part, the connecting part is fixedly installed in the instrument channel, the distal end of the passive part is a mobile end, the mobile end has at least two moving parts distributed along the circumferential direction of the passive part, and at least part of the moving part is located in the instrument channel; the piezoelectric sheet is installed between the moving part and the inner wall of the instrument channel, the piezoelectric sheet is connected with a power line, and the piezoelectric sheet can be deformed by electrification to drive the moving part to deform, so as to change the inner diameter size of the mobile end. In this application, a piezoelectric sheet is provided to change the inner diameter of the mobile end, so as to change the water outlet diameter of the instrument channel. By controlling the electrification of the piezoelectric sheet, the water outlet diameter changes intermittently, so that the water flow increases and decreases the pressure, forming a pulse, increasing the disturbance of the liquid in the lower calyx, and facilitating the discharge of stone precipitation.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and particularly to a front-end assembly, an insertion portion, and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device, which is an inspection device that can directly enter the natural ducts of the human body and can provide sufficient diagnostic information for doctors to treat diseases. The endoscope includes an insertion portion, and the insertion portion can enter the human body through a body cavity or a surgical incision.

[0003] When using an endoscope and a negative pressure aspiration sheath to treat stones in the renal pelvis, establishing a negative pressure aspiration channel with the negative pressure aspiration sheath can cooperate with the endoscope to establish a stable water cycle and timely discharge the stones after being broken by a laser. For the fine crushed stones deposited on the inner wall of the renal calyx, the water flow ejected by the endoscope is often used to impact the crushed stones, so that the crushed stones can be lifted by the water flow and then smoothly sucked away, thereby improving the stone removal efficiency. However, such a stone removal effect is still limited, especially for the crushed stones deposited in the lower calyx, and it is difficult to completely remove the stones. Summary of the Invention

[0004] The purpose of this application is to provide a front-end assembly, an insertion portion, and an endoscope to solve the above-mentioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In a first aspect, an embodiment of this application provides a front-end assembly applied to an endoscope, including a front-end seat, a passive member, and a piezoelectric sheet; the front-end seat has an instrument channel; the passive member is a ring structure, the passive member has a connecting portion, the connecting portion is fixedly installed in the instrument channel, the distal end of the passive member is a mobile end, the mobile end has at least two moving portions distributed along the circumference of the passive member, and at least part of the moving portion is located in the instrument channel; the piezoelectric sheet is installed between the moving portion and the inner wall of the instrument channel, the piezoelectric sheet is connected with a power line, and the piezoelectric sheet can be energized to deform to drive the moving portion to deform, thereby changing the inner diameter size of the mobile end.

[0007] In a second aspect, an embodiment of this application provides an insertion portion, including the front-end assembly provided in the first aspect embodiment.

[0008] In a third aspect, an embodiment of this application provides an endoscope, including the insertion portion provided in the second aspect embodiment.

[0009] The technical solution provided by this application can achieve the following beneficial effects:

[0010] In this application, a passive component is installed in the instrument channel. The distal end of the passive component is a mobile end, and the mobile end includes at least two moving parts distributed circumferentially along the passive component. A piezoelectric sheet is arranged to cooperate with the moving parts. Since the piezoelectric sheet can be deformed after being electrified, the deformation of the piezoelectric sheet can be used to drive the deformation of the moving parts. Since the mobile end corresponding to the moving parts is of an annular structure, after the moving parts are deformed and their positions change, the inner diameter size of the mobile end will correspondingly change. By changing the inner diameter size of the mobile end, the water outlet diameter of the instrument channel is changed. By controlling the voltage and frequency of the piezoelectric sheet, the water outlet diameter of the instrument channel can be changed intermittently, so that the water flow rapidly increases and decreases the pressure in a short time, forming a pulse. The pulsed water flow can cause the liquid in the lower calyx to be disturbed, so that the stones and precipitates at the bottom of the lower calyx or close to the wall of the lower calyx can change their positions, facilitating the suction of the negative pressure aspiration sheath and increasing the probability of the stones, precipitates, etc. being discharged out of the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0012] Figure 1 is a schematic diagram of the overall structure of the front-end component provided by some embodiments of this application;

[0013] Figure 2 is a cross-section of the front-end component provided by some embodiments of this application Figure 1 ;

[0014] Figure 3 is about Figure 2 detail view of part A;

[0015] Figure 4 is a cross-section of the front-end component provided by some embodiments of this application Figure 2 ;

[0016] Figure 5 is a disassembled schematic diagram of the front-end component provided by some embodiments of this application;

[0017] Figure 6 is a cross-section of the front-end component provided by some embodiments of this application Figure 3 ;

[0018] Figure 7 is a cross-section of the front-end seat provided by some embodiments of this application Figure 1 ;

[0019] Figure 8Is a cross-section of the front seat provided by some embodiments of the present application Figure 2 ;

[0020] Figure 9 Is a schematic structural diagram of a passive component provided by some embodiments of the present application Figure 1 ;

[0021] Figure 10 Is a schematic structural diagram of a passive component provided by some embodiments of the present application Figure 2 ;

[0022] Figure 11 Is a schematic structural diagram of a passive component provided by some embodiments of the present application Figure 3 ;

[0023] Figure 12 Is a schematic structural diagram of a passive component provided by some embodiments of the present application Figure 4 ;

[0024] Figure 13 Is a schematic diagram of the cooperation of a passive component, a piezoelectric sheet and a seal provided by some embodiments of the present application;

[0025] Figure 14 Is a schematic structural diagram of an endoscope provided by some embodiments of the present application.

[0026] In the figure: 100 - front seat, 110 - instrument channel, 111 - limit block, 112 - limit groove, 200 - passive component, 210 - connecting part, 220 - mobile end, 221 - moving part, 221a - installation groove, 221b - abutting section, 222 - moving gap, 223 - through hole, 300 - piezoelectric sheet, 400 - power line, 500 - seal, 600 - adhesive layer, 710 - PCB, 720 - camera module, 800 - insertion part, 810 - instrument tube, 900 - endoscope handle. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other implementation manners obtained by those of ordinary skill in the art without making creative efforts based on the embodiments of the present invention fall within the scope protected by the present invention.

[0028] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0029] In various embodiments of this application, "proximal" and "distal" refer to the relative distances of the endoscope and its accessories from the user in the usage environment. Among them, the end closer to the user is designated as "proximal", and the end farther from the user is designated as "distal".

[0030] An embodiment of this application provides a front-end component. Refer to Figures 1 to 6 As shown, the front-end component includes a front-end seat 100, a passive member 200, and a piezoelectric sheet 300. The front-end seat 100 is a part of the insertion portion 800 of the endoscope and is located at the farthest distal end of the insertion portion 800. The front-end seat 100 has an instrument channel 110. When the endoscope is inserted into the human body, the front-end seat 100 is located at the forefront and directly contacts the inner wall of the human body cavity.

[0031] During the operation, instruments such as a laser fiber enter the human body through the instrument channel 110. At the same time, liquids, etc. can also be injected into the human body through the instrument channel 110. The insertion portion 800 further includes an instrument tube 810. The proximal end of the instrument tube 810 is connected to the handle of the endoscope to facilitate the insertion of various instruments. The distal end of the instrument tube 810 extends to the position where the front-end seat 100 is located and is disposed in the instrument channel 110. Refer to Figures 2 to 4 As shown. The instrument tube 810 may also not be disposed in the instrument channel 110, but the distal end of the instrument tube 810 is directly docked with the proximal end of the instrument channel 110. The instrument tube 810 and the instrument channel 110 are communicated, and the instruments or liquids passing through the instrument tube 810 can be output outside the front-end seat 100 through the instrument channel 110.

[0032] The passive member 200 is of a ring structure. The passive member 200 has a connecting portion 210. The connecting portion 210 is fixedly installed in the instrument channel 110. The passive member 200 is fixedly connected to the instrument channel 110 through the connecting portion 210. And the distal end of the passive member 200 is a mobile end 220. The mobile end 220 is a part of the passive member 200. The mobile end 220 is also of a ring structure. The mobile end 220 has at least two moving portions 221 distributed along the circumferential direction of the passive member 200. And at least a part of the moving portion 221 is located in the instrument channel 110.

[0033] When the instrument tube 810 is installed in the instrument channel 110, the connecting portion 210 is indirectly fixed to the instrument channel 110 through the instrument tube 810. The connecting portion 210 is fixed to the instrument tube 810, and the instrument tube 810 is fixed to the instrument channel 110. In some other embodiments, it is also possible that the instrument tube 810 and the passive member 200 are sequentially installed in the instrument channel 110 along the axial direction of the instrument channel 110, with reference to Figure 2 , Figure 4 and Figure 6 as shown.

[0034] The piezoelectric sheet 300 is installed between the moving portion 221 and the interior of the instrument channel 110. The piezoelectric sheet 300 is installed in the space between the passive member 200 and the inner wall of the instrument channel 110. When using the endoscope, various instruments and the liquid to be transported are output from the annular cavity of the passive member 200. Therefore, the inner diameter of the mobile end 220 is actually also the water outlet diameter of the instrument channel 110, which is the actual liquid outlet end.

[0035] The piezoelectric sheet 300 is connected to a power line 400. When the power line 400 is energized, the piezoelectric sheet 300 can be energized and deformed. The piezoelectric sheet 300 is a thin sheet made of piezoelectric material, and its working principle is based on the piezoelectric effect. When an electric field is applied to the piezoelectric material, the piezoelectric material will generate deformation, which is called the inverse piezoelectric effect. When an external voltage is applied to the piezoelectric sheet 300, the piezoelectric sheet 300 will undergo obvious mechanical deformation according to the magnitude and frequency of the voltage, converting electrical energy into mechanical energy.

[0036] After being energized and deformed, the piezoelectric sheet 300 can drive the moving portion 221 to deform, thereby changing the inner diameter size of the mobile end 220. After the piezoelectric sheet 300 is energized, the piezoelectric sheet 300 will deform. Since it is installed between the moving portion 221 and the instrument channel 110, the piezoelectric sheet 300 does not have a deformation space. Therefore, when the piezoelectric sheet 300 deforms, it will also drive the moving portion 221 to deform synchronously.

[0037] The mobile end 220 is of an annular structure and is composed of at least two moving portions 221 distributed along its circumference. After the moving portion 221 deforms, its position will also change, thereby changing the inner diameter size of the mobile end 220. By changing the magnitude and frequency of the voltage of the piezoelectric sheet 300, the deformation direction of the piezoelectric sheet 300 is controlled. When the piezoelectric sheet 300 deforms towards the center of the instrument channel 110, the moving portion 221 approaches the center of the instrument channel 110, and the inner diameter size of the mobile end 220 decreases; when the piezoelectric sheet 300 deforms towards the inner wall of the instrument channel 110, the moving portion 221 approaches the center of the instrument channel 110, and the inner diameter size of the mobile end 220 increases.

[0038] The outlet of the mobile end 220 changes. Correspondingly, the water outlet diameter of the instrument channel 110 also changes, and the pressure of the liquid output from the instrument channel 110 will also change. By controlling the energizing voltage and frequency of the piezoelectric sheet 300, the water outlet diameter of the instrument channel 110 changes intermittently, so that the water flow rapidly increases and decreases the pressure in a short time, forming a pulse. The pulsed water flow can disturb the accumulated liquid, stones and precipitates in the lower calyx, so that the stones and precipitates located at the bottom of the lower calyx or close to the wall of the lower calyx can change their positions, facilitating the suction by the negative pressure suction sheath, and increasing the probability of the stones, precipitates, etc. being discharged out of the human body, solving the problem of unsatisfactory lithotripsy and discharge effect in the prior art.

[0039] The moving part 221 deforms under the drive of the piezoelectric sheet 300. In some embodiments, the piezoelectric sheet 300 is fixedly connected to the moving part 221, so as to ensure that the moving part 221 can deform and move following the piezoelectric sheet 300 when the piezoelectric sheet 300 deforms. In some other embodiments, the piezoelectric sheet 300 and the moving part 221 can be in abutting fit, and the moving part 221 has a good ability to recover from deformation. After the piezoelectric sheet 300 drives the moving part 221 to move close to the center of the instrument channel 110 and then the piezoelectric sheet 300 deforms towards the inner wall of the instrument channel 110, the moving part 221 can approach the piezoelectric sheet 300 under its own ability to recover from deformation to recover the deformation.

[0040] In some embodiments, an airbag can be used instead of the above-mentioned piezoelectric sheet 300. After the airbag is inflated and expanded, it can also drive the moving part 221 to move and reduce the inner diameter size of the mobile end 220. After the airbag deflates and shrinks, the inner diameter size of the mobile end 220 is enlarged. However, compared with using the piezoelectric sheet 300, the process of controlling the inner diameter size of the mobile end 220 by the airbag is longer, and it cannot cause the water flow to rapidly increase and decrease the pressure in a short time. The pulsed water flow formed has a poor effect, and the disturbance effect on the stone precipitates in the lower calyx is poor.

[0041] In some embodiments of the present application, referring to Figures 2 to 6 As shown, the front-end assembly further includes a seal 500. The seal 500 is an annular structure made of an elastic material. The seal 500 is sleeved outside the mobile end 220 and is located at the distal end of the piezoelectric sheet 300. The seal 500 is tightly abutted between the moving part 221 and the inner wall of the instrument channel 110. The seal 500 serves to seal the gap between the moving part 221 and the inner wall of the instrument channel 110.

[0042] Since the mobile end 220 includes at least two moving parts 221, there is a gap between the two moving parts 221, and the liquid in the input instrument channel 110 will be diverted from the gap between the two moving parts 221, which will affect the pressure of the output liquid. Therefore, a seal 500 is provided to seal the gap between the moving part 221 and the inner wall of the instrument channel 110, so as to ensure that the liquid in the instrument channel 110 is only output from the annular cavity of the mobile end 220. Whether the moving part 221 is deformed or not, the seal 500 is always pressed tightly between the moving part 221 and the instrument channel 110 to fill the gap between the moving part 221 and the instrument channel 110 and achieve sealing.

[0043] Both the seal 500 and the piezoelectric sheet 300 are pressed tightly between the moving part 221 and the inner wall of the instrument channel 110, and the seal 500 is located at the distal end of the piezoelectric sheet 300. The piezoelectric sheet 300 is farther from the end face of the mobile end 220 relative to the seal 500. When the piezoelectric sheet 300 drives the moving part 221 to deform, the deformation degree of the end of the moving part 221 is higher, and the change in the inner diameter size of the mobile end 220 is larger.

[0044] When the moving part 221 is not deformed, the inner diameter size of the mobile end 220 is larger, and the inner diameter of the seal 500 is stretched and expanded to be sleeved outside the mobile end 220. When the moving part 221 is deformed, the inner diameter size of the mobile end 220 is reduced, and the inner diameter size of the seal 500 is reduced and tightly sleeved outside the mobile end 220. Since the seal 500 is of an annular structure, the seal 500 can prompt the cross-section of the channel formed by the mobile end 220 to be approximately maintained as a circle, so that the liquid output from the passive part 200 can be maintained in a cylindrical shape, so that the liquid has a better gathering effect after spraying, and the disturbance effect on the liquid stones in the lower calyx is improved.

[0045] It should be noted that even if the piezoelectric sheet 300 is not energized and deformed, the seal 500 cannot drive the moving part 221 to deform and approach the center of the instrument channel 110 alone, ensuring that the moving part 221 can only deform and move under the drive of the piezoelectric sheet 300, so as to ensure the accuracy of the pulsed water flow regulation.

[0046] The seal 500 can be made of a rubber material. Refer to Figure 3 As shown, the seal 500 can include a plurality of annular structures, and the plurality of annular structures are sleeved outside the mobile end 220 side by side. The cross-section of the annular structure can be square or circular. In some preferred embodiments, the annular structures with square cross-sections are located at both ends, and the annular structures with circular cross-sections are located in the middle. The annular structures with circular cross-sections cannot be completely fitted, and a certain deformation space can be reserved, so that the seal 500 is more fittingly installed between the mobile end 220 and the inner wall of the instrument channel 110.

[0047] In some embodiments, referring to Figure 5 and Figures 9 to 12 as shown, an installation groove 221a is provided on the outer wall surface of the moving part 221, the seal 500 is installed in the installation groove 221a, and the seal 500 is in limit fit with the installation groove 221a in the axial direction of the passive part 200. The position of the seal 500 is limited in the axial direction of the passive part 200 by using the installation groove 221a. The moving part 221 is deformed, and the distal end of the moving part 221 is a free end with the least constraint. The closer to the distal end of the moving part 221, the smaller the inner diameter dimension of the moving end 220. The seal 500 is installed in the installation groove 221a to prevent the seal 500 from sliding towards the distal end of the moving end 220 and causing the seal 500 to disengage from the moving end 220 when the moving part 221 moves and the inner diameter dimension of the moving end 220 becomes smaller.

[0048] The moving end 220 is a part of the passive part 200 and is of an annular structure. In some embodiments of the present application, the passive part 200 has at least two active gaps 222, and the active gaps 222 extend along the axial direction of the passive part 200 from the distal end face of the moving end 220 towards the proximal end of the moving end 220. Referring to Figures 9 to 13 as shown, the part of the moving end 220 between two adjacent active gaps 222 forms the moving part 221.

[0049] The moving end 220 is segmented by using the active gaps 222, so as to form at least two moving parts 221 distributed along the circumferential direction of the moving end 220. The active gaps 222 provide a structural condition for the reduction of the inner diameter dimension of the moving end 220. After the edges of two adjacent moving parts 221 close to the active gaps 222 abut against each other, the inner diameter dimension of the moving end 220 is reduced to the minimum.

[0050] In some preferred embodiments, referring to Figures 9 to 12 as shown, the moving end 220 is provided with a through hole 223 penetrating its side wall. The through hole 223 communicates the inside and outside of the moving end 220, and the through hole 223 is communicated with the active gap 222 and is located at the proximal end of the active gap 222. The hole edge of the through hole 223 is of an arc structure. The arc structure can reduce stress concentration points. When two adjacent moving parts 221 are deformed and approach each other, stress concentration is not likely to occur at the joint position of the two moving parts 221, and the situation of tearing and damage at the joint position of two adjacent moving parts 221 can be effectively avoided.

[0051] Further preferably, the connecting part 210 of the passive part 200 is the through hole 223 provided on the moving end 220, and the passive part 200 can be fixed to the instrument channel 110 by using the through hole 223. Referring to Figures 9 to 10 as shown, the radial dimension of the through hole 223 is greater than the width dimension of the opening of the through hole 223 communicated with the active gap 222. Referring toFigure 7 As shown, a limiting block 111 is provided on the inner wall of the instrument channel 110. The limiting block 111 is embedded in the through hole 223 to fix the relative positions of the passive member 200 and the instrument channel 110. Since the limiting block 111 is embedded in the through hole 223, the limiting block 111 can support the edge of the through hole 223, improving the structural strength of the passive member 200 and avoiding damage and tearing at the connection position between two adjacent moving parts 221.

[0052] In some other embodiments of the present application, the connecting portion 210 is a convex structure provided on the outer wall surface of the passive member 200, as shown in Figure 11 shown. Correspondingly, as shown in Figure 8 shown, a limiting groove 112 is provided on the inner wall of the instrument channel 110. The connecting portion 210 is snapped into the limiting groove 112 to complete the fixation of the passive member 200 and the instrument channel 110.

[0053] The piezoelectric sheet 300 drives the moving part 221 to deform and move. When multiple moving parts 221 all move closer to the axis of the passive member 200, the multiple moving parts 221 approach each other, thereby reducing the inner diameter size of the mobile end 220. In some embodiments of the present application, as shown in Figures 10 to 12 shown, a contact section 221b is provided at the distal end of the moving part 221. Along the direction from the proximal end to the distal end of the passive member 200, the width dimension of the contact section 221b gradually decreases. When the piezoelectric sheet 300 drives the moving part 221 to deform, the edges of two adjacent contact sections 221b can be in tight contact with each other, as shown in Figure 12 shown.

[0054] The distal end of the moving part 221 is a free end and is subject to the least constraint. When the piezoelectric sheet 300 drives the moving part 221 to deform and move, the distal end of the moving part 221 moves the largest distance. Therefore, the width dimension of the contact section 221b is set to be smaller closer to the distal end, which is adapted to the moving distance of the moving part 221, so that the edges of two adjacent contact sections 221b can be in tight contact with each other, reducing the risk of liquid leakage from the moving gap 222 between two adjacent moving parts 221.

[0055] In some embodiments of the present application, as shown in Figures 1 to 4 shown, the entire passive member 200 is located within the instrument channel 110. During the process of inserting the endoscope into the human body, the passive member 200 will not affect the insertion process of the endoscope. In other embodiments, as shown in Figure 6 shown, the passive member 200 may also be only partially located within the instrument channel 110.

[0056] Inside the front-end component, a PCB 710, a camera module 720, etc. are also provided. The camera module 720 is installed on the distal end face of the front-end seat 100, and the PCB 710 is installed inside the front-end seat 100. The PCB 710 is connected with a signal line. In some embodiments, refer to Figure 4 and Figure 6 As shown, the PCB 710 is fixed by using glue, and a glue layer 600 is formed after the glue solidifies.

[0057] In some specific embodiments, the power line 400 connected to the piezoelectric sheet 300 extends out of the instrument channel 110, so that the power line 400 is away from the humid environment inside the instrument channel 110. When fixing the PCB 710, the glue is filled to the position where the power line 400 extends out of the instrument channel 110. Refer to Figure 4 and Figure 6 As shown, the glue is used to seal the opening on the instrument channel 110 to avoid liquid leakage from the instrument channel 110.

[0058] In some preferred embodiments of the present application, the mobile end 220 is provided with four moving parts 221, and the four moving parts 221 are evenly distributed along the circumferential direction of the passive part 200. Correspondingly, four piezoelectric sheets 300 can also be provided. The four piezoelectric sheets 300 are arranged in one-to-one correspondence with the four moving parts 221. The power line 400 is provided with at least two. Moreover, two adjacent piezoelectric sheets 300 are respectively connected to different power lines 400.

[0059] When there are two power lines 400, the same power line 400 is respectively connected to two moving parts 221 located on the same radial direction of the mobile end 220. By controlling the voltage magnitude and frequency of the two power lines 400, the moving direction of the moving part 221 is controlled, so that the four moving parts 221 deform in the same direction, or the adjacent moving parts 221 deform in different directions, thereby making the shape at the outlet of the mobile end 220 change regularly and improving the liquid disturbance ability.

[0060] In some embodiments, the power line 400 is selected as a twisted pair.

[0061] The embodiment of the present application also provides an insertion part 800. Refer to Figure 14 As shown, it includes the front-end component provided in any of the above embodiments, and the front-end component is located at the front end position of the insertion part 800.

[0062] The embodiment of the present application also provides an endoscope. Refer to Figure 14 As shown, it includes the insertion part 800 provided in the above embodiment. The endoscope further includes an endoscope handle 900, and the proximal end of the insertion part 800 is installed at the endoscope handle 900.

[0063] The endoscope provided by the embodiments of the present application may be a nephroscope, or may be a bronchoscope, esophagoscope, gastroscope, colonoscope, otoscope, nasal endoscope, oral endoscope, laryngoscope, vaginoscope, laparoscope, arthroscope, etc. The embodiments of the present application do not specifically limit the types of endoscopes.

[0064] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0065] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A front-end component, applied to an endoscope, characterized in that Comprising: A front seat (100), the front seat (100) having an instrument channel (110); A passive member (200), the passive member (200) being of an annular structure, the passive member (200) having a connecting portion (210), the connecting portion (210) being fixedly installed in the instrument channel (110), the distal end of the passive member (200) being a mobile end (220), the mobile end (220) having at least two moving portions (221) distributed circumferentially along the passive member (200), and at least a part of the moving portion (221) being located in the instrument channel (110); A piezoelectric sheet (300), the piezoelectric sheet (300) being installed between the moving portion (221) and the inner wall of the instrument channel (110), the piezoelectric sheet (300) being connected to a power line (400), the piezoelectric sheet (300) being capable of being energized and deformed to drive the moving portion (221) to deform regularly, thereby regularly changing the inner diameter size of the mobile end (220).

2. The front-end component according to claim 1, characterized in that The front-end assembly further includes a seal (500), the seal (500) being of an annular structure made of an elastic material, the seal (500) being sleeved outside the mobile end (220), the seal (500) being located at the distal end of the piezoelectric sheet (300), the seal (500) being tightly pressed between the moving portion (221) and the inner wall of the instrument channel (110) to seal the gap between the moving portion (221) and the instrument channel (110).

3. The front-end component according to claim 2, characterized in that, An installation groove (221a) is provided on the outer wall surface of the moving portion (221), the seal (500) is installed in the installation groove (221a), and the seal (500) is in limit fit with the installation groove (221a) in the axial direction of the passive member (200).

4. The front-end component according to claim 1, characterized in that, The passive member (200) has at least two active gaps (222), the active gaps (222) extending proximally from the distal end face of the mobile end (220) along the axial direction of the passive member (200), and the part of the mobile end (220) between adjacent two active gaps (222) forms the moving portion (221); The mobile end (220) is provided with a through hole (223) penetrating its side wall, the through hole (223) communicating with the active gap (222) and being located at the proximal end of the active gap (222), and the edge of the through hole (223) being of an arc structure.

5. The front-end component according to claim 4, characterized in that, The connecting portion (210) is a through hole (223) provided in the mobile end (220), and the radial dimension of the through hole (223) is greater than the width dimension of the opening of the through hole (223) communicating with the active gap (222), and a limiting block (111) is provided on the inner wall of the instrument channel (110), the limiting block (111) being embedded in the through hole (223).

6. The front-end component according to claim 1, characterized in that, The connecting part (210) is a convex structure arranged on the outer wall surface of the passive part (200), a limiting groove (112) is arranged on the inner wall of the instrument channel (110), and the connecting part (210) is clamped into the limiting groove (112).

7. A front-end component according to claim 1, characterized in that, A butting section (221b) is arranged at the distal end of the moving part (221). Along the direction from the proximal end to the distal end of the passive part (200), the width dimension of the butting section (221b) gradually decreases. When the piezoelectric sheet (300) drives the moving part (221) to deform, the edges of two adjacent butting sections (221b) can be butted and matched tightly.

8. A front-end component according to claim 1, characterized in that, Four of the moving parts (221) are arranged on the mobile end (220), and the four moving parts (221) are evenly distributed along the circumferential direction of the passive part (200); Four piezoelectric sheets (300) are arranged, and the four piezoelectric sheets (300) are arranged in one-to-one correspondence with the four moving parts (221). There are at least two power lines (400), and two adjacent piezoelectric sheets (300) are respectively connected to different power lines (400).

9. An insertion part, characterized in that, It includes the front-end assembly according to any one of claims 1-8.

10. An endoscope, characterized in that, It includes the insertion part (800) according to claim 9.

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