Front end shell, front end shell assembly and endoscope

Abstract

The present invention provides a front end shell, a front end shell assembly and an endoscope, belonging to the technical field of endoscopes. The front end shell has an instrument channel, a camera module mounting portion and a cutting cavity; the instrument channel runs through the axial ends of the front end shell, and the instrument channel is used for the instrument to pass through; the distal end face of the front end shell is concave to form a cutting cavity, and the portion of the front end shell located between the cutting cavity and the instrument channel is provided with a first notch, the cutting cavity is connected to the instrument channel through the first notch, and the first notch extends to the distal end face of the front end shell, and the cutting cavity is installed with a cutting blade. The present invention arranges a cutting blade on the front end shell, and uses the cutting blade to cut the stone removal basket, so that the stone removal basket is broken into two parts, and the stone removal basket retained in the instrument channel can be directly taken out of the instrument tube, leaving space for the insertion of the optical fiber, so that the optical fiber can smoothly pass through the instrument channel to reach the preset position, and the stone removal basket and stones are processed.

Description

Technical Field

[0001] The present invention belongs to the technical field of endoscopes, and in particular relates to a front end shell, a front end shell component and an endoscope. Background Art

[0002] During stone removal surgery, a stone removal basket is usually used to put stones or foreign objects in the patient's body into the basket and remove them with the basket. However, in actual operation, due to visual impairment, it is often difficult to accurately judge the size and shape of the stone. As a result, when the basket needs to be removed during the stone removal operation, due to the stone being too large or the body cavity being narrowed, the basket and the stone may be stuck at the same position when the basket is dragged to a certain position, and the basket cannot be pulled forward or pushed backward.

[0003] In the prior art, some operations use laser to break the basket, then pull out the basket, and then treat the stones again. However, due to the small diameter of the instrument tube of the endoscope, after the basket is inserted into the instrument tube, the remaining space in the instrument tube can no longer accommodate the laser fiber. Even if the laser fiber is inserted, there is no guarantee that the laser fiber can smoothly reach the preset position to break the basket, and the problem of the basket getting stuck cannot be solved. Some operations directly cut off the stone removal basket at the handle of the endoscope, causing the stone removal basket to break at the proximal end, and then surgically remove the basket trapped in the human body. This operation is relatively cumbersome, takes a long time, and has a high risk. Summary of the invention

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

[0005] This application is implemented as follows:

[0006] In the first aspect, an embodiment of the present application provides a front end shell, which is applied to an endoscope, and the front end shell has an instrument channel, a camera module mounting portion and a cutting cavity; the instrument channel runs through the axial ends of the front end shell, the instrument channel is used for allowing the instrument to pass through, and the camera module mounting portion is used to install the camera module; the distal end face of the front end shell is concave to form a cutting cavity, and a part of the front end shell located between the cutting cavity and the instrument channel is provided with a first notch, the cutting cavity is connected to the instrument channel through the first notch, and the first notch extends to the distal end face of the front end shell, and the cutting cavity is installed with a cutting blade.

[0007] In the second aspect, an embodiment of the present application provides a front end shell assembly, including a stone removal device and a front end shell provided by the embodiment of the first aspect; the stone removal device includes a sleeve and a stone removal basket, the stone removal basket includes a basket body and an operating rod connected to the basket body, the operating rod has a pre-bent section, and the two ends of the pre-bent section can gradually move away from each other under the action of an external force to gradually straighten the pre-bent section; the sleeve is used to be sleeved on the outside of the stone removal basket, and the inner wall of the sleeve can be tightly fitted with the pre-bent section to reduce the degree of bending of the pre-bent section.

[0008] In a third aspect, an embodiment of the present application provides an endoscope, comprising a front end shell provided by the embodiment of the first aspect or a front end shell assembly provided by the embodiment of the second aspect.

[0009] The technical solution adopted in this application can achieve the following beneficial effects:

[0010] In the present application, a cutting blade is provided on the front end shell, and the cutting blade is used to cut the stone removal basket, thereby causing the stone removal basket to break into two parts, one part of which remains in the instrument channel, and the other part of which remains in the human body cavity together with the stone; wherein the stone removal basket retained in the instrument channel can be directly taken out of the instrument tube, leaving space for the optical fiber to be inserted, so that the optical fiber can smoothly pass through the instrument channel to reach the preset position, and the basket and the stone can be processed, thereby reducing the difficulty of operation and improving the processing efficiency.

[0011] The present application provides a cutting cavity for installing a cutting blade, which can to a certain extent prevent the cutting blade from affecting the normal use of the instrument passing through the instrument channel; at the same time, the cutting cavity is arranged at the distal end face of the front end shell, and the first notch connected to the cutting cavity and the instrument channel also extends to the distal end face of the front end shell, so as to facilitate the operator to move the stone removal basket into the cutting cavity and use the cutting blade to cut the stone removal basket, thereby improving the convenience of the cutting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention 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.

[0013] Figure 1 This is a schematic diagram of the overall structure of the front end shell provided in some embodiments of the present application. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the overall structure of the front end shell provided in some embodiments of the present application. Figure 2 ;

[0015] Figure 3 is a cross-sectional view of a front end housing provided in some embodiments of the present application;

[0016] Figure 4 This is a schematic diagram of the overall structure of the front end shell assembly provided in some embodiments of the present application. Figure 1 ;

[0017] Figure 5 This application is about Figure 4 Detailed view of point A;

[0018] Figure 6 The overall structure of the stone removal device provided in some embodiments of the present application is shown in FIG. Figure 1 ;

[0019] Figure 7 This is a schematic diagram of the overall structure of the front end shell assembly provided in some embodiments of the present application. Figure 2 ;

[0020] Figure 8 The overall structure of the stone removal device provided in some embodiments of the present application is shown in FIG. Figure 2 ;

[0021] Fig. 9 This is a schematic diagram of the overall structure of the front end shell assembly provided in some embodiments of the present application. Figure 3 ;

[0022] Fig.10 This application is about Fig. 9 Detail of point B;

[0023] Fig.11 It is a schematic diagram of the structure of an endoscope provided in some embodiments of the present application.

[0024] In the figure: 100-front end shell, 110-instrument channel, 120-cutting cavity, 121-first notch, 130-camera module mounting part, 140-light source mounting part, 200-cutting blade, 210-blade, 300-sleeve, 400-stone removal basket, 410-basket body, 420-operating rod, 421-pre-bent section, 422-limiting ring, 423-first straight section, 424-second straight section, 500-cutting gap, 600-camera module, 700-light source, 800-handle. DETAILED DESCRIPTION

[0025] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0026] In each embodiment of the present application, "proximal end" and "distal end" refer to the end of the endoscope and its accessories that are closer to the user in the use environment as the "proximal end" and the end that is farther from the user as the "distal end", where the "distal end" and "proximal end" also correspond to the front and back relationships respectively.

[0027] The present application embodiment provides a front end housing 100, which is applied to an endoscope, Figures 1 to 3 As shown, the front end shell 100 has an instrument channel 110 , a camera module mounting portion 130 and a cutting cavity 120 .

[0028] The instrument channel 110 runs through both axial ends of the front end shell 100, and is used for passing instruments through the instrument channel 110. During the use of the endoscope, various instruments that need to be used, such as the stone removal basket 400, optical fiber, etc., need to pass through the instrument channel 110 and enter the preset tissue cavity.

[0029] The tube used to insert the endoscope into the human body is generally called the insertion part, which includes a curved tube, and the front end shell 100 is installed at the distal end of the curved tube. An instrument tube is arranged in the curved tube, and the instrument tube is used for various instruments to pass through. In some embodiments, the instrument tube can extend from the curved tube to the instrument channel 110 in the front end shell 100; in other embodiments, the instrument tube does not extend into the front end shell 100, and the instrument tube is connected to the instrument channel 110 of the front end shell 100.

[0030] The camera module installation portion 130 is used to install the camera module 600, refer to Figure 7 As shown, the camera module 600 is used to obtain image information of the front end of the front end housing 100. In some embodiments, the front end housing 100 is further provided with a light source mounting portion 140, and the light source mounting portion 140 is used to mount a light source 700, Figure 7 As shown, light source 700 provides illumination light.

[0031] The distal end surface of the front end shell 100 is concave to form a cutting cavity 120. The portion of the front end shell 100 located between the cutting cavity 120 and the instrument channel 110 is provided with a first notch 121, and the cutting cavity 120 is connected to the instrument channel 110 through the first notch 121. In addition, the first notch 121 extends to the distal end surface of the front end shell 100, and the first notch 121 also penetrates the distal end surface of the front end shell 100, so that the instrument channel 110 and the cutting cavity 120 are connected at the distal end surface of the front end shell 100. The cutting cavity 120 is installed with a cutting blade 200. The cutting blade 200 is fixed to the inner wall of the cutting cavity 120, and the cutting blade 200 is used to cut the stone removal basket 400.

[0032] The cutting cavity 120 is arranged at the distal end face of the front end shell 100, and cooperates with the first notch 121 extending to the distal end face of the front end shell 100. The cutting cavity 120 can form a larger opening with the instrument channel 110 at the distal end face of the front end shell 100, so that the stone removal basket 400 located in the human tissue cavity can enter the cutting cavity 120, which is convenient for the operator to control the cutting blade 200 to cut the stone removal basket 400, thereby improving the convenience of the cutting operation.

[0033] The cutting cavity 120 and the instrument channel 110 are separately provided, and the cutting blade 200 is installed in the cutting cavity 120 to prevent the cutting blade 200 from being in the instrument channel 110 , thereby preventing the cutting blade 200 from affecting the normal use of various instruments in the instrument channel 110 .

[0034] In the present application, a cutting blade 200 is provided, and the cutting blade 200 is used to cut the stone removal basket 400. The stone removal basket 400 generally includes a basket body 410 and an operating rod 420. The basket body 410 is sleeved outside the stone to drive the stone to move together. In the case where the basket body 410 and the stone are stuck together at a certain position of the human body cavity, the operating rod 420 of the basket body 410 can be moved toward the cutting cavity 120 by controlling the movement of the front end shell 100, so that the operating rod 420 can be cut by the cutting blade 200.

[0035] After the cutting blade 200 cuts off the operating rod 420, the stone removal basket 400 is broken into two parts, the basket body 410 that is stuck in the human body cavity together with the stone is one part, and the part of the operating rod 420 located in the instrument channel 110 is the other part. The basket body 410 is stuck in the human body cavity and cannot move, but the operating rod 420 located in the instrument channel 110 is separated from the basket body 410, and the movement of this part of the operating rod 420 will not be restricted by the basket body 410 and the stone. Therefore, the operating rod 420 in the instrument channel 110 can be controlled to withdraw from the instrument channel 110 of the endoscope. After the operating rod 420 withdraws from the instrument channel 110, the space in the instrument channel 110 is freed, and there is enough space in the instrument channel 110 for the optical fiber to be inserted. The optical fiber can be smoothly inserted into the instrument channel 110 and reach the preset position of the human body cavity to treat the stuck basket body 410 and the stone.

[0036] In some treatment methods, the optical fiber can directly interrupt the basket body 410, and the interrupted basket body 410 can be separated from the stone to remove the interrupted basket body 410. Alternatively, the optical fiber can directly treat the stone to break it up, and after the stone is broken up, a clamp can be inserted to clamp the basket body 410, and the basket body 410 can be dragged out of the human body, or a new stone removal basket 400 can be used to remove the broken stone. The optical fiber can also be used to treat the basket body 410 and the stone at the same time, and the basket body 410 can be separated from the stone.

[0037] Compared with the treatment method in the prior art, the front end shell 100 provided in the embodiment of the present application processes the stone extraction basket 400, and the operation method is simpler, more convenient, and the risk is also low. In addition, although there is an operation in the prior art to cut off the operating rod 420 of the stone extraction basket 400 at the handle 800, in this operation, the operating rod 420 located in the instrument channel 110 cannot be taken out, so a surgical operation is required to remove the stone extraction basket 400 trapped in the human body. In some operations, a surgical operation may not be performed, but the insertion part of the endoscope is first removed from the human body, so that the operating rod 420 is withdrawn from the instrument channel 110, and then the insertion part is inserted into the same cavity position again. However, during the insertion process, the operating rod 420 retained in the human body cannot enter the instrument channel 110 of the insertion part, and the operating rod 420 is excluded from the insertion part. In this way, after the insertion part reaches the preset position, the operating rod 420 will not affect the insertion of the optical fiber, and the operator can smoothly insert the optical fiber into the instrument channel 110 and use the optical fiber to treat the stone removal basket 400 and the stone.

[0038] However, the above operation method is too complicated, and the above operation method will further increase the difficulty of insertion during the second insertion of the endoscope due to the obstruction of the operating rod 420. The embodiment of the present application can directly process the operating rod 420 of the stone removal basket 400 through the front end shell 100 without the need to insert the endoscope for the second time, thereby simplifying the operation steps of processing the stone removal device, reducing the difficulty of operation, and improving the processing efficiency.

[0039] When an instrument tube is installed in the instrument channel 110 , it should be noted that the instrument tube needs to avoid the cutting cavity 120 to prevent the tube wall of the instrument tube from affecting the connection between the cutting cavity 120 and the instrument channel 110 .

[0040] When the cutting blade 200 is used to cut the operating rod 420 of the stone extraction basket 400, the cutting blade 200 is controlled to move back and forth relative to the stone extraction basket 400, so that the operating rod 420 is more easily cut off. The cutting blade 200 has a blade 210, which is the main component of the cutting blade 200 for cutting the operating rod 420. Figures 1 to 3As shown, the extension direction of the blade 210 has a component parallel to the axial direction of the instrument channel 110. The instrument channel 110 is a channel on the front end shell 100. When the front end shell 100 is in the human body cavity, it is more convenient to operate by moving the front end shell 100 relative to the operating rod 420 along its axial direction rather than moving the front end shell 100 relative to the operating rod 420 along its radial direction. The extension direction of the blade 210 is set to have a component parallel to the axial direction of the instrument channel 110, and the front end shell 100 is controlled to move relative to the operating rod 420 along the axial direction of the front end shell 100, so that the blade 210 and the operating rod 420 can move back and forth and rub, making it easier to cut off the operating rod 420.

[0041] The blade 210 may be arranged to extend along the axial direction of the instrument channel 110 , or the blade 210 may be arranged to be inclined relative to the axial direction of the instrument channel 110 , so as to facilitate the control of the movement of the blade 210 relative to the front end shell 100 .

[0042] In some preferred embodiments of the present application, two cutting blades 200 are provided. Figure 1 and Figure 2 As shown, the blades 210 of the two cutting blades 200 are arranged facing each other, and a cutting gap 500 is formed between the two blades 210. The operating rod 420 of the stone-taking net basket 400 is inserted into the cutting gap 500. In the cutting gap 500, both blades 210 can cut the operating rod 420, which can improve the cutting efficiency of the operating rod 420. At the same time, since the two blades 210 are arranged facing each other, both blades 210 can limit the operating rod 420 to prevent the operating rod 420 from shifting, so that the operating rod 420 is kept as close to the blades 210 as possible, thereby improving the cutting effect of the blades 210 on the operating rod 420.

[0043] Further preferably, the width of the cutting gap 500 gradually decreases from the distal end of the instrument channel 110 to the proximal end of the instrument channel 110, and the width of the cutting gap 500 is the distance between the two blades 210. The closer to the distal end of the instrument channel 110, the larger the distance between the two blades 210, and the easier it is for the operating rod 420 to be inserted between the two blades 210, so that the operating rod 420 contacts the blades 210. In addition, the distance between the two blades 210 will gradually decrease, and the blades 210 with reduced spacing can squeeze the operating rod 420, making it easier to cut the operating rod 420.

[0044] In some embodiments of the present application, reference may be made to Figure 3As shown, along the direction from the proximal end of the instrument channel 110 to the distal end of the instrument channel 110, the radial distance between the wall of the cutting cavity 120 and the instrument channel 110 gradually decreases. The distance between the cutting cavity 120 and the instrument channel 110 is the largest at the distal end of the instrument channel 110, that is, the opening formed at the distal end surface of the front end shell 100 where the cutting cavity 120 and the instrument channel 110 are connected is relatively large, and when the front end shell 100 and the operating rod 420 are controlled to move relative to each other, it is easier to move the operating rod 420 toward the cutting cavity 120. The size of the cutting cavity 120 is smaller as it is closer to the proximal end of the instrument channel 110, which can reduce the space occupied by the cutting cavity 120 in the front end shell 100 to a certain extent.

[0045] In some preferred embodiments, the camera module mounting portion 130, the cutting cavity 120 and the instrument channel 110 are sequentially arranged along the radial direction of the front end shell 100. The camera module mounting portion 130 is installed with the camera module 600, and the camera module 600, the cutting cavity 120 and the instrument channel 110 are located in the same radial direction. When cutting the operating rod 420, the operator can clearly see the position of the operating rod 420 relative to the cutting cavity 120 and the instrument channel 110, which is convenient for the operator to adjust the position of the operating rod 420 according to the image information fed back by the camera module 600, so that the operating rod 420 can be cut more conveniently.

[0046] The present application also provides a front end housing assembly, referring to Figures 4 to 10 As shown, it includes a stone removal device and a front end shell 100 provided by any of the above embodiments. When the stone removal device is in use, the stone removal device passes through the instrument channel 110 of the front end shell 100 .

[0047] refer to Figure 6 As shown, the stone removal device includes a sleeve 300 and a stone removal basket 400, wherein the stone removal basket 400 includes a basket body 410 and an operating rod 420 connected to the basket body 410. The basket body 410 is generally formed by connecting a plurality of curved memory alloy wires, and the plurality of memory alloys are connected to each other to form a mesh structure. One end of the operating rod 420 is connected to the basket body 410, and the other end is usually located at the endoscope handle 800 when in use, so that the operator can control the position of the stone removal basket 400. The operating rod 420 has a pre-bent section 421, and the pre-bent section 421 is in a bent state when there is no external force. In addition, the two ends of the pre-bent section 421 can gradually move away from each other under the action of an external force, so that the pre-bent section 421 gradually straightens, and the overall length of the pre-bent section 421 gradually increases in the axial direction of the operating rod 420.

[0048] Since the basket body 410 and the pre-bent section 421 are both in a bent state without external force restriction, a large space is required, and it is inconvenient to operate when inserting the stone removal basket 400 into the instrument channel 110 of the insertion part. Therefore, the present application is provided with a sleeve 300, and the sleeve 300 is movably sleeved outside the stone removal basket 400, and the inner wall of the sleeve 300 can be tightly matched with the pre-bent section 421, so that the bending degree of the pre-bent section 421 is weakened, thereby limiting the pre-bent section 421 in the internal space of the sleeve 300, and it is more convenient to insert the stone removal device into the instrument channel 110 of the insertion part.

[0049] Similarly, the basket body 410 can also be retracted into the sleeve 300, and the inner wall of the sleeve 300 is pressed against the basket body 410, so that the basket body 410 is confined inside the sleeve 300, and the stone-taking basket 400 is confined in the sleeve 300 as a whole. Figure 7 and Figure 8 As shown, the stone removal basket 400 can be moved directly by moving the position of the sleeve 300. When the sleeve 300 moves to the distal position of the front end shell 100, the sleeve 300 and the stone removal basket 400 can be controlled to move relative to each other so that the basket body 410 and the pre-bent section 421 are disengaged from the sleeve 300.

[0050] Since the operating rod 420 is provided with a pre-bent section 421, and the pre-bent section 421 can gradually straighten when forces are applied to both ends, and can gradually restore the bent state when no external forces are applied, the pre-bent section 421 provides a certain range of motion for the operating rod 420. Within this range of motion, even if the basket body 410 is stuck in the tissue cavity of the human body, the operator can control the movement of the operating rod 420, so that the operating rod 420 and the blade 210 of the cutting blade 200 move relative to each other, thereby cutting the operating rod 420.

[0051] Moreover, after the pre-bent section 421 is bent, the radial range of the operating rod 420 in the instrument channel 110 becomes larger. When the operating rod 420 is controlled to move radially along the instrument channel 110, the pre-bent section 421 can more easily enter the cutting cavity 120 and contact the cutting blade 200, thereby making it easier to cut off the operating rod 420 and the cutting process of the operating rod 420 is more convenient.

[0052] refer to Figure 4 and Figure 5 As shown, by adjusting the position of the pre-bent segment 421 and the front end shell 100, the pre-bent segment 421 can be aligned with the cutting cavity 120, and then the operating rod 420 is controlled to move along the axial direction of the instrument channel 110, so that the pre-bent segment 421 can enter the cutting cavity 120 and contact the cutting blade 200.

[0053] In some embodiments of the present application, two cutting blades 200 are provided, and the cutting edges 210 of the two cutting blades 200 are arranged to face each other, and a cutting gap 500 is formed between the two cutting edges 210 .

[0054] In some embodiments, both ends of the cutting gap 500 can be closed ends, the width of the cutting gap 500 is greater than the radial dimension of the operating rod 420, and the operating rod 420 is directly inserted into the cutting gap 500. In this configuration, although the blade 210 can also cut the operating rod 420, due to the wide width of the cutting gap 500, the two blades 210 cannot cut the operating rod 420 at the same time, resulting in poor cutting effect and low cutting efficiency.

[0055] In other embodiments, at least one end of the cutting gap 500 may be set as an open end, and the width of the open end is greater than the radial dimension of the operating rod 420, so that the operating rod 420 can be smoothly inserted into the cutting gap 500 from the open end. Figure 4 , Figure 5 , Figure 6 , Fig. 9 as well as Fig.10 As shown, the outer diameter of the limiting ring 422 is greater than the width of the cutting gap 500 , and the limiting ring 422 cannot pass through the cutting gap 500 .

[0056] When the operating rod 420 is cutting, the operating rod 420 is inserted into the cutting gap 500 through the open end of the cutting gap 500. Since the size of the limiting ring 422 is large, the limiting ring 422 cannot directly pass through the cutting gap 500. Therefore, in the process of controlling the operating rod 420 to move relative to the cutting blade 200, the limiting ring 422 is pressed against the cutting blade 200, thereby preventing the operating rod 420 from leaving the cutting gap 500, ensuring that the operating rod 420 is always in contact with the blade 210, thereby improving the cutting efficiency.

[0057] refer to Fig. 9 and Fig.10 As shown, the operating rod 420 is cut by the cutting blade 200 and is broken into two parts, one part is located in the sleeve 300 and the other part is connected to the basket body 410 , and the limiting ring 422 is located on the part of the operating rod 420 connected to the basket body 410 .

[0058] In some embodiments, the width of the cutting gap 500 may be greater than the radial dimension of the operating rod 420, and only one blade 210 can cut the operating rod 420 at a time, and the blade 210 that does not cut the operating rod 420 mainly plays a limiting role to prevent the operating rod 420 from being separated from the blade 210. In some preferred embodiments, the width of some cutting gaps 500 is less than the radial dimension of the operating rod 420, and both blades 210 can cut the operating rod 420 at the same time, thereby improving the cutting efficiency.

[0059] In some preferred embodiments, the surface of the limit ring 422 that is connected to the surface of the pre-bent section 421 is a curved surface. In the process of cutting the operating rod 420, the limit ring 422 and the cutting blade 200 move relative to each other, and there is friction between the two. The surface of the limit ring 422 and the cutting blade 200 that rubs against each other is the surface that the limit ring 422 and the surface of the pre-bent section 421 are connected. Setting this surface as a curved surface can reduce the contact area between the limit ring 422 and the cutting blade 200, thereby reducing the friction between the limit ring 422 and the cutting blade 200, and reducing the force that the operator needs to apply to control the relative movement of the operating rod 420 and the cutting blade 200.

[0060] When cutting the operating rod 420, the operator adjusts the position of the operating rod 420 at the handle 800 of the endoscope, while the cutting blade 200 and the limiting ring 422 are both located at the front end shell 100 at the distal end of the insertion portion. The two positions are far apart, which increases the difficulty for the operator to control the operating rod 420. In the embodiment of the present application, the friction between the limiting ring 422 and the cutting blade 200 is reduced, thereby reducing the difficulty of controlling the operating rod 420.

[0061] In addition, when the extension direction of the blade 210 of the cutting blade 200 has a component parallel to the axial direction of the instrument channel 110, and the distance between the two blades 210 gradually decreases from the distal end to the proximal end, the cutting efficiency of the operating rod 420 can be further improved. On the one hand, it is easier for the operator to control the operation rod 420 to move along its axial direction, stretch the pre-bent section 421, and control the back and forth movement between the pre-bent section 421 and the blade 210. On the other hand, the cutting gap 500 with a gradually decreasing width has a squeezing effect on the pre-bent section 421, and the squeezing effect cooperates with the cutting effect of the blade 210, so that the pre-bent section 421 can be quickly cut into two parts.

[0062] In some embodiments of the present application, reference Figure 6As shown, in addition to the pre-bent section 421, the operating rod 420 also includes a first straight section 423 and a second straight section 424 that are coaxially arranged, and the pre-bent section 421 is connected between the first straight section 423 and the second straight section 424. The vertical distance between any point on the pre-bent section 421 and the axis of the first straight section 423 is less than or equal to the vertical distance between the limiting ring 422 and the axis of the first straight section 423. The vertical distance refers to the shortest distance between the two on a plane. In this embodiment, the limiting ring 422 is located at the part of the pre-bent section 421 that is farthest from the axis of the first straight section 423. When the operating rod 420 is controlled to move and the operating rod 420 is moved into the cutting chamber 120, it is easier to move the limiting ring 422 to the side of the cutting blade 200 away from the operating rod 420, thereby limiting the operating rod 420 through the limiting ring 422.

[0063] The present application also provides an endoscope, including the front end housing 100 provided in any of the above embodiments, or including the front end housing assembly provided in any of the above embodiments, with reference to Fig.11 shown.

[0064] The endoscope provided in the embodiment of the present application can be a pyeloscope, or it can be a bronchoscope, a suction endoscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A front end shell, applied to an endoscope, characterized in that: The front end housing (100) has an instrument channel (110), a camera module mounting portion (130) and a cutting cavity (120); The instrument channel (110) passes through two axial ends of the front end housing (100), the instrument channel (110) is used for allowing instruments to pass through, and the camera module mounting portion (130) is used for mounting a camera module (600); The distal end surface of the front end shell (100) is concave to form the cutting cavity (120); a portion of the front end shell (100) located between the cutting cavity (120) and the instrument channel (110) is provided with a first notch (121); the cutting cavity (120) is communicated with the instrument channel (110) via the first notch (121), and the first notch (121) extends to the distal end surface of the front end shell (100); a cutting blade (200) is installed in the cutting cavity (120); and the cutting blade (200) is used to cut the stone removal basket (400).

2. A front end housing according to claim 1, characterized in that: The extending direction of the blade edge (210) of the cutting blade (200) has a component parallel to the axial direction of the instrument channel (110); And / or, the camera module mounting portion (130), the cutting cavity (120), and the instrument channel (110) are arranged in sequence along the radial direction of the front end shell (100).

3. A front end housing according to claim 2, characterized in that: Two cutting blades (200) are provided, and the blade edges (210) of the two cutting blades (200) are arranged facing each other, with a cutting gap (500) formed between the two blade edges (210).

4. A front end housing according to claim 3, characterized in that: Along the direction from the distal end of the instrument channel (110) to the proximal end of the instrument channel (110), the width of the cutting gap (500) gradually decreases.

5. A front end housing according to claim 1, characterized in that: Along the direction from the proximal end of the instrument channel (110) to the distal end of the instrument channel (110), the radial distance between the wall surface of the cutting cavity (120) and the instrument channel (110) gradually decreases.

6. A front end housing assembly, characterized in that: It comprises a stone removal device and a front end housing (100) according to any one of claims 1 to 5; The stone removal device comprises a sleeve (300) and a stone removal basket (400), wherein the stone removal basket (400) comprises a basket body (410) and an operating rod (420) connected to the basket body (410), wherein the operating rod (420) has a pre-bent section (421), and the two ends of the pre-bent section (421) can gradually move away from each other under the action of an external force so that the pre-bent section (421) is gradually straightened, and the pre-bent section (421) is used to extend into the cutting cavity (120) and contact the cutting blade (200); The sleeve (300) is used to be sleeved onto the outside of the stone removal basket (400), and the inner wall of the sleeve (300) can be tightly fitted with the pre-bent section (421) to reduce the degree of bending of the pre-bent section (421).

7. A front end housing assembly according to claim 6, characterized in that: There are two cutting blades (200), the blades (210) of the two cutting blades (200) are arranged facing each other, a cutting gap (500) is formed between the two blades (210), at least one end of the cutting gap (500) is an open end, and the width of the open end is greater than the radial dimension of the operating rod (420); A limiting ring (422) is fixedly disposed outside the pre-bent section (421), and the outer diameter of the limiting ring (422) is greater than the width of the cutting gap (500).

8. A front end housing assembly according to claim 7, characterized in that: The operating rod (420) further comprises a first straight segment (423) and a second straight segment (424) which are coaxially arranged, and the pre-bent segment (421) is connected between the first straight segment (423) and the second straight segment (424); The vertical distance between any point on the pre-bent segment (421) and the axis of the first straight segment (423) is less than or equal to the vertical distance between the limiting ring (422) and the axis of the first straight segment (423).

9. A front end housing assembly according to claim 7, characterized in that: The surface of the limiting ring (422) that is connected to the surface of the pre-bent section (421) is a curved surface.

10. An endoscope, characterized in that: A front end shell (100) comprising any one of claims 1 to 5 or a front end shell assembly comprising any one of claims 6 to 9.

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