Insertion part and endoscope

Abstract

The invention discloses an insertion part and an endoscope, and belongs to the technical field of endoscopes. The insertion part comprises an instrument tube and a driving piece, and the instrument tube extends from the near end of the insertion part to the far end of the insertion part; the driving part is mounted on the peripheral wall of the instrument tube and used for controllably driving the tube wall of the instrument tube to deform in the radial direction of the instrument tube so as to change the inner diameter size and / or shape of part of the instrument tube connected with the driving part; the instrument tube comprises a fixing area, the fixing area is fixedly matched with the front end base of the insertion part, and the driving piece is located on the near end side of the fixing area. Deformation of the tube wall of the instrument tube is controlled by controlling the driving piece, so that the inner diameter size and / or shape of the instrument tube are / is changed, the pressure of water flow output from the instrument tube is adjusted, the pressure of the water flow in the instrument tube is controlled to be rapidly increased and reduced in a short time to form pulses, and the pulse water flow can disturb liquid in renal calyx. Therefore, the suction of the negative pressure suction sheath is facilitated, and the calculus removal effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to an insertion portion and an endoscope. Background Art

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

[0003] When using an endoscope and a negative pressure suction sheath to treat stones in the renal calyx, the use of the negative pressure suction sheath to establish a negative pressure suction channel can cooperate with the endoscope to establish a stable water circulation and promptly discharge the stones that have been broken by the laser. For the tiny stones deposited on the inner wall of the renal calyx, the water flow sprayed by the endoscope is often used to impact the stones, so that the stones can be carried by the water flow and then smoothly sucked away, thereby improving the stone removal efficiency. However, the stone removal effect is still limited, especially for the stones deposited in the lower calyx, which is even more so, and it is difficult to remove the stones completely. Summary of the invention

[0004] The purpose of the present application is to provide 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: In a first aspect, an embodiment of the present application provides an insertion portion, which is applied to an endoscope, and includes an instrument tube and a driving member, wherein the instrument tube extends from the proximal end of the insertion portion to the distal end of the insertion portion; the driving member is installed on the peripheral wall of the instrument tube, and the driving member is used to controllably drive the tube wall of the instrument tube to deform along the radial direction of the instrument tube to change the inner diameter size and / or shape of the part of the instrument tube connected to the driving member; the instrument tube includes a fixed area, which is fixedly matched with the front end seat of the insertion portion, and the driving member is located on the proximal side of the fixed area.

[0006] In a second aspect, an embodiment of the present application provides an endoscope, comprising the insertion portion provided by the embodiment of the first aspect.

[0007] The technical solution provided by this application can achieve the following beneficial effects: In the present application, a driving member is installed on the peripheral wall of the instrument tube. The driving member can drive the tube wall of the instrument tube to deform along the radial direction of the instrument tube after being controlled, thereby changing the inner diameter size and / or shape of the part of the instrument tube corresponding to the driving member. By changing the inner diameter size and / or shape of the instrument tube, the pressure and flow state of the water flow output from the instrument tube are changed. By controlling the controlled frequency of the driving member, the inner diameter and / or shape of the instrument tube can be intermittently changed, so that the water flow can quickly increase and decrease the pressure in a short time to form a pulse; the pulsed water flow can cause the liquid in the renal calyx to be disturbed, so that the bottom of the renal calyx or close to the renal calyx is disturbed. The stones and sediments on the wall of the renal calyx can change their positions to facilitate the suction of the negative pressure suction sheath, thereby increasing the probability of stones and sediments being discharged out of the human body and improving the stone discharge effect; and, a fixed area is set on the instrument tube, and the driving member is located on the proximal side of the fixed area. When the instrument tube is deformed, the position of the fixed area will not be squeezed, and no or basically no obvious compressive deformation will occur. The connection and matching relationship between the fixed area and the front end seat can be well maintained, and the liquid outside the insertion part can be prevented from entering the interior of the insertion part through the gap caused by the deformation of the instrument tube or the devices around the fixed area can be prevented from being affected by the deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 only 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.

[0009] Figure 1 is a schematic diagram of the overall structure of the insertion portion provided in some embodiments of the present application; Figure 2 is a partial cross-sectional view of the insertion portion provided in some embodiments of the present application Figure 1 ; Figure 3 is a partial cross-sectional view of the insertion portion provided in some embodiments of the present application Figure 2 ; Figure 4 About Figure 3 Detailed view of point A; Figure 5 About Figure 3 Detail of point B; Figure 6 is a partial cross-sectional view of the insertion portion provided in some embodiments of the present application Figure 3 ; Figure 7 About Figure 6 Detailed view of point C; Figure 8This is a schematic diagram of the cooperation between the instrument tube and the driving member provided in some embodiments of the present application Figure 1 ; Fig. 9 It is a schematic diagram of the coordination of the instrument tube, the driving member and the limiting tube provided in some embodiments of the present application; Fig.10 This is a schematic diagram of the cooperation between the instrument tube and the driving member provided in some embodiments of the present application Figure 2 ; Fig.11 is a schematic diagram of the overall structure of a front end seat provided in some embodiments of the present application; Fig.12 is a cross-sectional view of a front end seat provided in some embodiments of the present application; Fig.13 is a schematic diagram of the structure of an instrument tube provided in some embodiments of the present application; Fig.14 This is a schematic diagram of the structure of the endoscope provided in some embodiments of the present application. Figure 1 ; Fig.15 This is a schematic diagram of the structure of the endoscope provided in some embodiments of the present application. Figure 2 ; Fig.16 is a cross-sectional view of a control assembly provided in some embodiments of the present application; Fig.17 It is a partial structural diagram of the control components provided in some embodiments of the present application.

[0010] In the figure: 10-insertion part, 20-endoscope handle, 100-front end seat, 110-instrument channel, 120-camera module installation part, 200-instrument tube, 210-installation groove, 300-fixing part, 410-driving part, 411-piezoelectric sheet, 412-air bag, 420-control circuit, 421-power line, 422-trachea, 430-glue layer, 500-snake bone section, 600-limiting tube, 710-camera module, 720-PCB, 800-control component, 810-liquid channel, 820-impeller, 830-button, 840-rotating shaft, 850-cam, 860-control air bag, 870-middle piece, 880-housing. DETAILED DESCRIPTION

[0011] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0012] In the specification and claims, "and / or" means at least one of the connected objects, and the character " / " generally means that the previously and subsequently associated objects are in an "or" relationship.

[0013] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0014] The present application embodiment provides an insertion portion 10, referring to Figures 1 to 7 As shown, the insertion part 10 is applied to an endoscope. The insertion part 10 is a part of the endoscope. When the endoscope is used, the insertion part 10 is inserted into the human body through a natural cavity of the human body or a surgical incision. A camera module 710 and other components are arranged at the distal end of the insertion part 10. The camera module 710 obtains image information in the human body, which is convenient for doctors to judge the location of the lesion and select appropriate diagnosis and treatment methods.

[0015] The insertion portion 10 includes an instrument tube 200, which extends from the proximal end of the insertion portion 10 to the distal end of the insertion portion 10. The space inside the instrument tube 200 forms a surgical channel. During the use of the endoscope, medical devices such as laser optical fibers enter the human body through the instrument tube 200. At the same time, liquids and the like can also be injected through the instrument tube 200.

[0016] The insertion part 10 further includes a driving member 410, which is mounted on the peripheral wall of the instrument tube 200. The driving member 410 is used to controllably drive the tube wall of the instrument tube 200 to deform along the radial direction of the instrument tube 200, so as to change the inner diameter size and / or shape of the part of the instrument tube 200 connected to the driving member 410. The driving member 410 can receive an external signal. After receiving the external signal, the position and / or shape of the driving member 410 will change. Since the driving member 410 is connected to the peripheral wall of the instrument tube 200, the driving member 410 will drive the tube wall of the part of the instrument tube 200 connected to the driving member 410 to deform. After the tube wall of the instrument tube 200 is deformed, the inner diameter size and / or shape of the part of the instrument tube 200 will change.

[0017] In the specific use of the endoscope, the instrument tube 200 can be used as a liquid channel 810 to inject water into the human body through the instrument tube 200. The inner diameter and / or shape of the instrument tube 200 changes, so that the pressure of the water output by the instrument tube 200 changes. By controlling the controlled frequency of the driving member 410, the inner diameter and / or shape of the instrument tube 200 can be changed intermittently and regularly, so that the pressure of the water output by the instrument tube 200 increases and decreases regularly in a short period of time, thereby forming a pulsed water flow.

[0018] The pulsed water flow can disturb the accumulated liquid, stones and sediments in the renal calyx, especially the lower calyx, so that the stones and sediments located at the bottom of the lower calyx or close to the wall of the lower calyx can change their positions, which is convenient for suction by the negative pressure suction sheath, and increases the probability of stones and sediments being discharged out of the human body, thereby solving the problems of unsatisfactory lithotripsy and poor stone removal effects in the prior art.

[0019] The change in the inner diameter and / or shape of the instrument tube 200 can also change the flow state of the water output by the instrument tube 200. The flow state of the water flow includes changes in the flow rate and flow direction of the water flow. When the flow state of the water flow changes, the impact effect on the liquid in the renal calyx will also change, thereby disturbing the liquid, stones or sediments in the renal calyx, making it easier for the negative pressure suction sheath to perform suction.

[0020] The driving member 410 can receive external signals, and deform and / or move according to the instructions of the external signals, thereby driving the deformation of the tube wall of the instrument tube 200 connected thereto. In some embodiments, the driving member 410 can receive signals through wireless transmission. The structure of wireless transmission is more concise, and unnecessary data lines can be omitted, saving the internal installation space of the insertion part 10. In other embodiments, the driving member 410 can also receive signals through wired transmission. The driving member 410 is connected to a control circuit 420, and the control circuit 420 can be arranged along the extension direction of the instrument tube 200 to save the internal installation space of the insertion part 10 as much as possible. The wired transmission signal is more stable, which can make the shape and / or inner diameter size change of the instrument tube 200 more accurate, and improve the control of the pulsed water flow.

[0021] The tube wall of the instrument tube 200 is deformed under the drive of the driving member 410. When the driving member 410 moves toward the middle of the instrument tube 200 and / or deforms, the tube wall of the instrument tube 200 moves toward the middle thereof, the inner diameter of the instrument tube 200 decreases, and the water flow pressure output by the instrument tube 200 increases; when the driving member 410 moves toward and / or deforms away from the middle of the instrument tube 200, the tube wall of the instrument tube 200 moves toward a position away from the middle thereof, the inner diameter of the instrument tube 200 increases, and the water flow pressure output by the instrument tube 200 decreases.

[0022] During the deformation process of the instrument tube 200, the inner diameter of the instrument tube 200 increases, which can indicate that the tube wall of the instrument tube 200 gradually recovers from the position close to the middle to the position before deformation, and the maximum value of the inner diameter of the instrument tube 200 is the inner diameter of the instrument tube 200 before deformation. In other embodiments, the inner diameter of the instrument tube 200 increases, which can also indicate that the tube wall of the instrument tube 200 moves and / or deforms directly from the undeformed position toward the direction away from the middle, and the maximum value of the inner diameter of the instrument tube 200 is greater than the inner diameter of the instrument tube 200 before deformation. In this case, the variation range of the inner diameter of the instrument tube 200 is large, thereby increasing the pressure variation range of the water flow output by the instrument tube 200, improving the effect of water flow disturbance on the accumulation of sediment and stones in the renal calyx to a certain extent, and further improving the stone removal effect.

[0023] The instrument tube 200 is located inside the insertion part 10. In addition to the instrument tube 200, other components are installed inside the insertion part 10, such as data transmission lines, etc. The inside of the insertion part 10 needs to be kept dry and sealed to prevent the liquid in the human body cavity from entering the insertion part 10 during the insertion of the insertion part 10 into the human body, thereby affecting the normal use of the internal devices of the insertion part 10.

[0024] When in use, the driving member 410 drives the tube wall of the instrument tube 200 to deform and / or move, causing the instrument tube 200 to deviate from its original position. In some embodiments of the present application, the instrument tube 200 includes a fixed area, and the fixed area is fixedly matched with the front end seat 100 of the insertion part 10. Even if the instrument tube 200 is deformed and / or moved, the position of the fixed area remains unchanged and is always sealed and fixed with the front end seat 100. There is no gap between the instrument tube 200 and the front end seat 100 through which liquid can pass, thereby preventing liquid outside the insertion part 10 from entering the insertion part 10 through the gap between the instrument tube 200 and the front end seat 100.

[0025] The front end seat 100 is a part of the insertion part 10, located at the farthest end of the insertion part 10, and can directly contact the human body tissue. The camera module 710, PCB 720 and other components are fixed to the front end seat 100. The instrument channel 110 is directly fixed to the front end seat 100. Fig.11 and Fig.12 As shown, the front end seat 100 is provided with an instrument channel 110, and the instrument tube 200 is connected to the external environment through the instrument channel 110. There are many ways for the instrument tube 200 to communicate with the external environment. Figure 3 As shown, the instrument tube 200 is disposed in the instrument channel 110, and the instrument tube 200 passes through the front end seat 100 to achieve communication with the external environment. Figure 6 and Figure 7As shown, the proximal end of the instrument tube 200 is butted against the distal end of the instrument channel 110 , and the interior of the instrument tube 200 is butted against and communicated with the interior of the instrument channel 110 .

[0026] The fixing area of ​​the instrument tube 200 and the front end seat 100 may be fixed by adhesive, expansion, interference fit, etc., which is not specifically limited in the embodiments provided in this application. Figure 2 , Figure 3 , Figures 5 to 7 As shown, a fixing member 300 is provided between the instrument tube 200 and the front end seat 100. The fixing member 300 is an annular structure and is sleeved outside the instrument tube 200. The fixing member 300, the instrument tube 200 and the front end seat 100 can be fixed by gluing.

[0027] The driving member 410 is located at the proximal side of the fixing area to prevent the driving member 410 from contacting the liquid in the environment of the insertion part 10, thereby affecting the normal use of the driving member 410. In some preferred embodiments, the fixing area is an annular structure, which can seal the gap between the instrument tube 200 and the front end seat 100 in the circumferential direction of the instrument tube 200, further improving the sealing effect inside the insertion part 10.

[0028] The instrument tube 200 needs to be made of a deformable material to ensure that the instrument tube 200 can be smoothly deformed under the drive of the driving member 410. In some preferred embodiments, the fixing area of ​​the instrument tube 200 can be additionally reinforced to improve the connection stability between the instrument tube 200 and the front end seat 100.

[0029] The instrument tube 200 is deformed and / or moved under the drive of the driver 410. The instrument tube 200 is installed inside the insertion portion 10 and is fixedly connected to the front end seat 100. During the movement and / or deformation of the instrument tube 200, the instrument tube 200 is affected as a whole, and vibration occurs in most cases. The closer the tube wall of the instrument tube 200 is to the driver 410, the more obvious the vibration. In some embodiments of the present application, the driver 410 is located on the proximal side of the camera module mounting portion 120, so that the driver 410 is as far away from the camera module 710 as possible. In the case where the instrument tube 200 vibrates during the operation of the driver 410, the effect of the vibration of the instrument tube 200 on the camera module 710 can be reduced as much as possible.

[0030] The camera module mounting portion 120 is disposed on the front end seat 100, referring to Fig.11 and Fig.12 The camera module 710 is installed on the camera module installation portion 120 .

[0031] The driving member 410 is located at the proximal side of the camera module mounting portion 120. On the one hand, the distance between the camera module 710 and the driving member 410 is increased, and the impact of the vibration of the instrument tube 200 on the camera module 710 is reduced in space; on the other hand, the camera module 710 and the driving member 410 are prevented from being located at the same radial position, and the driving member 410 may move and / or deform during operation. If the camera module 710 and the driving member 410 are at the same radial position, the driving member 410 may touch the front end seat 100 during operation, thereby causing the front end seat 100 to vibrate, affecting the imaging quality of the camera module 710. The smaller the impact of the instrument tube 200 on the camera module 710, the more stable the position of the camera module 710, and the better the imaging quality.

[0032] The camera module mounting portion 120 indicates the mounting position of the camera module 710 on the front end seat 100. In some embodiments, the camera module mounting portion 120 may be a groove structure, the groove structure is located inside the front end seat 100, and the camera module 710 is directly mounted inside the front end seat 100. In other embodiments, the peripheral side wall of the front end seat 100 is concave, the camera module mounting portion 120 is the concave position, and the camera module 710 is directly mounted at the concave position.

[0033] The insertion part 10 further includes a snake bone section 500, which includes a plurality of snake bones connected in sequence, and two adjacent snake bones are rotatably connected. The snake bone section 500 is installed at the proximal side of the front end seat 100, referring to Figure 1 and Figure 2 The instrument tube 200 is inserted into the snake bone segment 500, and the driving member 410 is installed on the peripheral wall of the instrument tube 200 corresponding to the snake bone segment 500. Figure 6 As shown. In the attached figure, in order to make the attached figure clearer and highlight the invention point, the snake bone segment 500 is only briefly illustrated without drawing all the lines. The driving member 410 is far away from the front end seat 100, further preventing the driving member 410 from causing the instrument tube 200 to vibrate and affecting the imaging quality of the camera module 710. At the same time, even if the driving member 410 drives the instrument tube 200 to vibrate, it will cause the snake bone segment 500 to vibrate, but the snake bone segment 500 and the front end seat 100 are two components, which can further reduce the vibration effect transmitted to the front end seat 100.

[0034] The snake bone segment 500 includes a snake bone head section and a common snake bone, and the snake bone head section is located at the farthest end of the snake bone segment 500 and is connected to the front end seat 100. In some preferred embodiments, the driving member 410 is installed on the peripheral wall of the instrument tube 200 corresponding to the snake bone head section, while reducing the vibration effect of the driving member 410 movement and / or deformation on the camera module 710, so that the driving member 410 is as close as possible to the far end of the insertion part 10, so that the water flow output from the insertion part 10 maintains a strong pulse effect.

[0035] The portion of the instrument tube 200 corresponding to the serpentine segment 500 refers to the portion of the instrument tube 200 that passes through the serpentine segment 500 . Similarly, the portion of the instrument tube 200 corresponding to the first section of the serpentine refers to the portion of the instrument tube 200 that passes through the first section of the serpentine.

[0036] The snake bone segment 500 is generally an active bending segment, which can be actively bent under the pulling of the traction rope to facilitate the insertion part 10 to enter the human body cavity. The insertion part 10 also includes a passive bending segment, which is installed on the proximal side of the active bending segment. In addition, in order to ensure the sealing and dryness of the inside of the insertion part 10, the insertion part 10 will also be wrapped with skin and other components to isolate it from external influences. The skin is not shown in the drawings provided in the embodiments of this application.

[0037] The inner diameter size and / or shape of the instrument tube 200 is changed by causing the peripheral wall of the instrument tube 200 to deform through the driving member 410. In some embodiments of the present application, the insertion portion 10 includes at least one set of driving member groups, and the driving member group includes two driving members 410 located at the radial ends of the instrument tube 200. Figures 8 to 9 As shown, the two corresponding driving members 410 can synchronously approach or move away from the axis of the instrument tube 200, increase the deformation of the tube wall of the instrument tube 200, thereby increasing the variation range of the water flow pressure in the instrument tube 200, increasing the disturbance capacity of the water flow output from the instrument tube 200, and improving the stone removal effect.

[0038] The driving members 410 corresponding to each other act on the tube wall of the instrument tube 200 synchronously. When the two driving members 410 approach the axis of the instrument tube 200 synchronously, the inner diameter of the part of the instrument tube 200 is reduced. When the two driving members 410 move away from the axis of the instrument tube 200 synchronously, the inner diameter of the part of the instrument tube 200 is increased.

[0039] In some preferred embodiments, the insertion portion 10 includes at least two groups of drive components arranged along the axial direction of the instrument tube 200, which can be referred to as Figure 8 and Fig.10 As shown, the deformable length of the instrument tube 200 is increased, thereby improving the pulse effect of the water flow output from the instrument tube 200. In addition, in any of the above-mentioned axially arranged drive member groups, the gap formed between two adjacent drive members 410 is set corresponding to one of the drive members 410 in the drive member group axially adjacent to the drive member group. It can be understood that the axial ends of the drive member 410 correspond to the gap formed by the two drive members 410 of the other drive member group, so that the directions of deformation of the tube wall of the instrument tube 200 corresponding to the two adjacent drive member groups in the axial direction of the instrument tube 200 are different, thereby improving the disturbance performance of the water flow in the instrument tube 200.

[0040] Further preferably, at the same axial position of the instrument tube 200, two sets of driving member groups can be arranged crosswise, referring to Figure 8 and Fig.10 As shown, there are four evenly distributed driving members 410 on the same circumference of the instrument tube 200, and the four driving members 410 belong to two driving member groups, which increases the deformation of the tube wall of the instrument tube 200. In some specific embodiments, the two driving member groups can be controlled to operate intermittently, and the driving members 410 of one driving member group are moving closer to each other, while the driving members 410 of the other driving member group are moving away from each other, so that the final inner diameter size of the instrument tube 200 remains unchanged, but the shape is changed.

[0041] The driving member 410 is a member that drives the deformation of the instrument tube 200, and it can move and / or deform. Since the driving member 410 is fixed to the tube wall of the instrument tube 200, during the movement of the driving member 410, the tube wall of the instrument tube 200 connected to the driving member 410 follows the movement of the driving member 410 and deforms; during the deformation of the driving member 410, the tube wall of the instrument tube 200 connected to the driving member 410 deforms along with the deformation of the driving member 410.

[0042] In some preferred embodiments, reference Fig. 9 As shown, the insertion part 10 further includes a limiting tube 600, which is sleeved outside the instrument tube 200, and the driving member 410 is located between the limiting tube 600 and the instrument tube 200, and the rigidity of the limiting tube 600 is greater than the rigidity of the instrument tube 200. The deformation range of the driving member 410 is limited to the inner space of the limiting tube 600.

[0043] In addition to the instrument tube 200, other pipelines are also installed inside the insertion part 10, such as a traction rope, a data transmission line, etc. The components inside the insertion part 10 are generally not installed too compactly to avoid the situation where the insertion part 10 cannot be bent normally. In the case where the drive member 410 is deformed, since there is a certain space around the drive member 410, the drive member 410 may deform toward other free spaces inside the insertion part 10, which will not only reduce the deformation of the instrument tube 200, but also squeeze other components in the insertion part 10, which is not conducive to use.

[0044] In this regard, some embodiments of the present application provide a limit tube 600 to limit the deformation space of the driving member 410, so that the driving member 410 can smoothly squeeze the tube wall of the instrument tube 200. In addition, the limit tube 600 has a greater rigidity, and the instrument tube 200 is more likely to deform than the limit tube 600, so that the driving member 410 is more likely to drive the instrument tube 200 to deform, thereby increasing the deformation amount of the instrument tube 200 to a certain extent.

[0045] In some embodiments of the present application, the driving member 410 may include a piezoelectric sheet 411, and the piezoelectric sheet 411 is also connected to a power line 421, and the power line 421 is used to transmit an electrical signal to the piezoelectric sheet 411, thereby causing the piezoelectric sheet 411 to deform. In the case where the driving member 410 includes a piezoelectric sheet 411, the piezoelectric sheet 411 adopts wired control, and the control circuit 420 includes a power line 421, which is one of the control circuits 420, and the power line 421 is used to transmit power. The piezoelectric sheet 411 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 a piezoelectric material, the piezoelectric material will deform, which is called the inverse piezoelectric effect. When an external voltage is applied to the piezoelectric sheet 411, the piezoelectric sheet 411 will undergo obvious mechanical deformation according to the change in the magnitude and frequency of the voltage, and convert electrical energy into mechanical energy.

[0046] The piezoelectric sheet 411 that is deformed by power can drive the instrument tube 200 to deform, thereby changing the inner diameter size and / or shape of the instrument tube 200. By controlling the voltage and frequency of the piezoelectric sheet 411, the deformation direction of the piezoelectric sheet 411 is controlled to increase or decrease the inner diameter size of the instrument tube 200. In the case where multiple piezoelectric sheets 411 are installed outside the instrument tube 200, the piezoelectric sheets 411 can be connected in series or in parallel. In some embodiments, the power line 421 is a twisted pair.

[0047] It should be noted that if different piezoelectric sheets 411 need to be controlled to deform in different directions, different piezoelectric sheets 411 need to be connected to different power lines 421. In addition, since the piezoelectric sheet 411 will deform, the connection between the power line 421 and the piezoelectric sheet 411 needs to be reinforced, and additional glue can be used to fix it. Figure 4 and Figure 8 As shown, an adhesive layer 430 is provided at the connection position between the power line 421 and the piezoelectric sheet 411 .

[0048] The power cord 421 is installed together with the instrument tube 200 inside the insertion portion 10 , and the power cord 421 extends from the proximal end of the insertion portion 10 to the position of the driving member 410 .

[0049] In some preferred embodiments, the outer wall surface of the instrument tube 200 is further provided with a mounting groove 210, Fig.13As shown, the mounting groove 210 is used to install the piezoelectric piece 411. The mounting groove 210 can play a positioning role, which is convenient for the assembler to determine the installation position of the piezoelectric piece 411 and improve the assembly efficiency. At the same time, the piezoelectric piece 411 is located in the mounting groove 210. In the radial direction of the instrument tube 200, the space occupied by the piezoelectric piece 411 is reduced, which can save the radial space of the instrument tube 200 and reserve more space for the installation and activities of other components inside the insertion part 10. In addition, since the mounting groove 210 is set on the tube wall of the instrument tube 200, the tube wall of the instrument tube 200 becomes thinner, and the tube wall stiffness of the instrument tube 200 connected to the piezoelectric piece 411 is reduced, which is more likely to be deformed under the drive of the piezoelectric piece 411.

[0050] Further preferably, an additional pipe section is selected to install the piezoelectric piece 411, and during the assembly of the insertion portion 10, the pipe section equipped with the piezoelectric piece 411 is directly connected to another pipe section to form the instrument tube 200. The piezoelectric piece 411 is pre-installed in advance, and only the two pipe sections need to be connected to each other later, which can improve the assembly efficiency of the insertion portion 10.

[0051] In some other embodiments of the present application, the driving member 410 may also be made of magnetic material, and the driving member 410 may be controlled externally to move the driving member 410 so as to drive the instrument tube 200 to deform.

[0052] In some embodiments of the present application, the driving member 410 includes an airbag 412, which is connected to an air tube 422, which is in communication with the airbag 412, and the air tube 422 is used to deliver gas to the airbag 412, and the wall of the instrument tube 200 is driven to deform by driving the airbag 412 to expand. In the case where the driving member 410 includes the airbag 412, the driving member 410 is controlled by wire, and the control circuit 420 includes an air tube 422, which is in communication with the airbag 412 to deliver gas.

[0053] refer to Fig.10 As shown, the airbag 412 is fixed outside the instrument tube 200, and each airbag 412 can be connected to an air tube 422 to improve the inflation efficiency of the airbag 412, thereby improving the inflation and deflation speed of the airbag 412. By inflating the airbag 412, the airbag 412 expands, and the airbag 412 will squeeze the instrument tube 200 after expansion, thereby changing the inner diameter size and / or shape of the instrument tube 200. During the deflation process of the airbag 412, the airbag 412 gradually becomes smaller, and the squeezing effect on the instrument tube 200 gradually weakens, and the instrument tube 200 gradually returns to an undeformed state.

[0054] The trachea 422 is installed together with the instrument tube 200 inside the insertion part 10. One end of the trachea 422 is generally connected to a gas source or other device that can be used to inflate the airbag 412. The other end of the trachea 422 extends into the insertion part 10 and extends from the proximal end of the insertion part 10 to the location of the airbag 412. Since the airbag 412 needs to be inflated and deflated continuously, in some preferred embodiments, the same airbag 412 can be connected to two tracheas 422, one for inflation and one for deflation. One airbag 412 can also be connected to only one trachea 422, and the inflation and deflation of the airbag 412 can also be controlled by controlling the gas source end.

[0055] The present application also provides an endoscope, referring to Fig.14 and Fig.15 As shown, it includes the insertion part 10 provided by any of the above embodiments. The endoscope further includes an endoscope handle 20, and the proximal end of the insertion part 10 is mounted to the endoscope handle 20.

[0056] In some embodiments of the present application, reference Fig.15 As shown, the endoscope further includes a control component 800 , which is mounted on the endoscope handle 20 . The control component 800 is connected to the airbag 412 and is used to control the inflation and deflation of the airbag 860 .

[0057] refer to Fig.16 As shown, the control assembly 800 includes a housing 880, a liquid channel 810, and an impeller 820. The housing 880 is mounted to the endoscope handle 20, the liquid channel 810 is located inside the housing 880, the liquid channel 810 is communicated with the instrument tube 200 of the insertion portion 10, and liquid is input into the instrument tube 200 through the liquid channel 810. The impeller 820 is mounted inside the liquid channel 810, and the impeller 820 can rotate under the flow and flushing of the liquid.

[0058] refer to Fig.17As shown, the control assembly 800 also includes a button 830, a rotating shaft 840, a cam 850, a control airbag 860 and an intermediate piece 870. The rotating shaft 840 is fixed coaxially with the impeller 820, and the cam 850 is fixed to the rotating shaft 840. The rotation of the impeller 820 under the flushing of the liquid can drive the rotating shaft 840 to rotate synchronously, and the cam 850 fixed to the rotating shaft 840 also rotates synchronously. The button 830 is rotatably connected to the rotating shaft 840, and the rotation of the rotating shaft 840 does not drive the button 830 to rotate synchronously. In addition, the button 830 is movably connected to the housing 880 and can move relative to the housing 880 along the axial direction of the rotating shaft 840. By pushing the button 830 to move, the positions of the cam 850, the rotating shaft 840 and the impeller 820 can be changed, and the position of the impeller 820 in the liquid channel 810 can be adjusted. The closer the impeller 820 is to the center of the liquid channel 810, the stronger the driving force of the liquid on the impeller 820. The button 830 can also drive the impeller 820 to be as far away from the flow range of the liquid in the liquid channel 810 as possible, so as to prevent the impeller 820 from rotating under the flow of the liquid.

[0059] The middle piece 870 is fixed to the button 830. The middle piece 870 is hollow inside and is connected to the control airbag 860 and the air pipe 422. The control airbag 860 is fixed to the middle piece 870. When the impeller 820 is driven by the liquid in the liquid channel 810 to rotate, the control airbag 860 is located on the rotation path of the cam 850. When the cam 850 rotates following the rotating shaft 840, the cam 850 can squeeze the control airbag 860. When the cam 850 squeezes the control airbag 860, the control airbag 860 is compressed, and the excess gas is transmitted to the airbag 412 through the middle piece 870 and the air pipe 422 in sequence, so that the airbag 412 expands. When the cam 850 is away from the control airbag 860, the squeezing effect on the control airbag 860 disappears, and part of the gas in the airbag 412 at the distal end of the insertion part 10 is re-transported to the control airbag 860 through the trachea 422 and the middle piece 870 in turn, so that the control airbag 860 expands again and the airbag 412 at the distal end of the insertion part 10 shrinks.

[0060] The liquid flushing impeller 820 rotates, and the rotation of the impeller 820 drives the rotating shaft 840 and the cam 850 to rotate, so that the cam 850 periodically squeezes the control airbag 860, thereby causing the airbag 412 at the distal end of the insertion portion 10 to expand and contract periodically. In this way, the inner diameter size and / or shape of the instrument tube 200 can be controlled to change periodically, and the liquid output from the instrument tube 200 forms a pulse.

[0061] The impeller 820 can rotate directly driven by the flow of liquid without using an additional power source. At the same time, the position of the impeller 820 and the cam 850 can be controlled by moving the control button 830, thereby controlling whether to squeeze the control airbag 860, controlling whether the airbag 412 at the far end of the insertion part 10 is expanded, and controlling whether the water flow inside the instrument tube 200 forms a pulse. The operation is simple and quick.

[0062] In some preferred embodiments, the middle piece 870 may be an annular structure, the middle piece 870 is sleeved outside the rotating shaft 840 , the control airbag 860 is fixed to the inner wall surface of the middle piece 870 , and the cam 850 rotates in the annular cavity of the middle piece 870 .

[0063] The endoscope provided in the embodiment of the present application may be a nephroscope, or a bronchoscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, stomatoscope, laryngoscope, colposcope, laparoscope, arthroscope, etc. The embodiment of the present application does not impose any specific restrictions on the type of endoscope.

[0064] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0065] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An insertion portion, applied to an endoscope, characterized in that: include: An instrument tube (200), the instrument tube (200) extending from the proximal end of the insertion portion (10) to the distal end of the insertion portion (10); A driving member (410), the driving member (410) being mounted on the peripheral wall of the instrument tube (200), the driving member (410) being used to controllably drive the tube wall of the instrument tube (200) to deform along the radial direction of the instrument tube (200), so as to change the inner diameter size and / or shape of the portion of the instrument tube (200) connected to the driving member (410); The instrument tube (200) comprises a fixing area, the fixing area is fixedly matched with the front end seat (100) of the insertion part (10), and the driving member (410) is located on the proximal side of the fixing area.

2. An insertion portion according to claim 1, characterized in that: The front end seat (100) is also provided with a camera module mounting portion (120), and the camera module mounting portion (120) is used to mount the camera module (710), and the driving member (410) is located on the proximal side of the camera module mounting portion (120).

3. An insertion portion according to claim 1 or 2, characterized in that: The insertion portion (10) further comprises a serpentine segment (500), the serpentine segment (500) being mounted on the proximal side of the front end seat (100), the instrument tube (200) being passed through the serpentine segment (500), and the driving member (410) being mounted on a peripheral wall of the instrument tube (200) corresponding to the serpentine segment (500).

4. An insertion portion according to claim 1, characterized in that: The insertion portion (10) comprises at least one set of driving member groups, wherein the driving member group comprises two driving members (410) located at two radial ends of the instrument tube (200), and the two corresponding driving members (410) can synchronously approach or move away from the axis of the instrument tube (200).

5. An insertion portion according to claim 4, characterized in that: The insertion portion (10) comprises at least two groups of drive member groups arranged along the axial direction of the instrument tube (200), and in any one of the drive member groups, a gap formed between two adjacent drive members (410) is arranged corresponding to one of the drive members (410) in the drive member group axially adjacent to the drive member group.

6. An insertion portion according to claim 1, characterized in that: The driving member (410) comprises a piezoelectric sheet (411), the piezoelectric sheet (411) is further connected to a power line (421), and the power line (421) is used to transmit an electrical signal to the piezoelectric sheet (411).

7. An insertion portion according to claim 6, characterized in that: The outer wall surface of the instrument tube (200) is provided with a mounting groove (210), and the piezoelectric sheet (411) is mounted in the mounting groove (210).

8. An insertion portion according to claim 1, characterized in that: The driving member (410) further comprises an air bag (412), the air bag (412) being connected to an air pipe (422), the air pipe (422) being in communication with the air bag (412), the air pipe (422) being used to transport gas to the air bag (412).

9. The insertion portion according to claim 1, characterized in that: The insertion portion (10) further comprises a position limiting tube (600), wherein the position limiting tube (600) is sleeved outside the instrument tube (200), the driving member (410) is located between the position limiting tube (600) and the instrument tube (200), and the rigidity of the position limiting tube (600) is greater than the rigidity of the instrument tube (200).

10. An endoscope, characterized in that: It comprises the insertion part (10) according to any one of claims 1 to 9.

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