Endoscope and its front end components

Abstract

The present application belongs to the field of medical device technology, and specifically relates to an endoscope and its front-end component. The front-end component includes a front-end seat and an instrument tube, wherein a storage space is provided in the front-end seat, and a first instrument port and a second instrument port are provided at intervals on the front-end seat, and both the first instrument port and the second instrument port are connected to the storage space, and the distal end of the instrument tube extends into the storage space; the instrument tube can move relative to the front-end seat to switch between a first position and a second position, and when the instrument tube is in the first position, a first instrument passage is formed between the proximal opening of the instrument tube and the first instrument port; when the instrument tube is in the second position, a second instrument passage is formed between the proximal opening of the instrument tube and the second instrument port. The present application can help solve the problem that the current medical instruments such as lithotripsy tools can reach a limited area in the human body.

Description

Technical Field

[0001] The present application belongs to the field of medical device technology, and specifically relates to an endoscope and a front-end component thereof. Background Art

[0002] When diagnosing and treating lesions in the patient's body, an endoscope is usually required. The endoscope includes an operating handle and an insertion part. During specific operation, by controlling the operating handle, the active bending section at the distal end of the insertion part can be pulled by a traction rope to achieve bending action, thereby changing the direction of the distal end of the insertion part.

[0003] When using an endoscope and an introducer sheath to remove kidney stones, the sheath of the introducer sheath can be inserted into the kidney using a guide wire, and then the insertion portion of the endoscope is inserted into the sheath, so that the lithotripsy tool can be inserted into the kidney using the instrument channel in the insertion portion to break up the stones. However, in practice, the lithotripsy tool can only cover a limited area for breaking up the stones, which can result in some stones not being effectively broken up or removed, thereby reducing the stone removal rate. Summary of the invention

[0004] The purpose of the present application is to provide an endoscope and a front-end component thereof, which can help solve the problem that current medical instruments such as lithotripsy tools can only reach a limited area inside the human body.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the present application provides a front end assembly of an endoscope, including a front end seat and an instrument tube, wherein a receiving space is provided in the front end seat, a first instrument port and a second instrument port are provided at intervals on the front end seat, both of the first instrument port and the second instrument port are connected to the receiving space, and a distal end of the instrument tube extends into the receiving space;

[0007] The instrument tube can move relative to the front end seat to switch between a first position and a second position. When the instrument tube is in the first position, a first instrument passage is formed between the proximal opening of the instrument tube and the first instrument port; when the instrument tube is in the second position, a second instrument passage is formed between the proximal opening of the instrument tube and the second instrument port.

[0008] In a second aspect, the present application provides an endoscope comprising the above-mentioned front end assembly.

[0009] The beneficial technical effects of this application are as follows:

[0010] In the present application, the front end seat is provided with a first instrument opening and a second instrument opening, and the instrument tube can be switched between a first position and a second position. In the first position, a first instrument passage is formed between the proximal opening of the instrument tube and the first instrument opening, and medical instruments such as lithotripsy tools can pass through the instrument tube from the first instrument opening for surgery; in the second position, a second instrument passage is formed between the proximal opening of the instrument tube and the second instrument opening, and medical instruments such as lithotripsy tools can pass through the instrument tube from the second instrument opening for surgery. It can be seen that the present application can provide two different extension angles and directions for medical instruments through the first instrument opening and the second instrument opening, so that the medical instruments can be flexibly extended into various areas of the human body to increase the coverage area of ​​the medical instruments, that is, medical instruments such as lithotripsy tools can reach more areas in the human body, thereby solving the problem that stones cannot be effectively crushed or removed and the stone removal rate is low in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of the front-end component disclosed in the embodiment of the present application;

[0012] Figure 2 A cross-sectional view of a front end assembly of the instrument tube disclosed in an embodiment of the present application when the instrument tube is located in a first position;

[0013] Figure 3 A cross-sectional view of the front end assembly of the instrument tube disclosed in the embodiment of the present application when the instrument tube is located in the second position;

[0014] Figure 4 A cross-sectional view of the front end assembly of the instrument tube disclosed in the embodiment of the present application when the instrument tube is located at a third position;

[0015] Figure 5 This is a schematic diagram of the structure of the front end seat disclosed in the embodiment of the present application.

[0016] Description of reference numerals:

[0017] 100, front end seat; 101, first instrument opening; 102, second instrument opening; 103, first guide surface; 104, second guide surface; 110, accommodating space; 111, restraining channel; 120, first limiting portion; 130, second limiting portion; 140, seat body; 150, restraining tube; 200, instrument tube; 300, elastic member. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present 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 one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0020] The endoscope and its front-end components provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0021] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its components 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".

[0022] The inventors have discovered that the current front end seat is only provided with an instrument opening through which a lithotripsy tool extends to break up stones in a target area. The position of the instrument opening on the front end seat is fixed, and it can only provide an extension angle and direction for the lithotripsy tool. As a result, the lithotripsy tool can only cover a relatively small area, and therefore cannot effectively break up or remove stones outside the coverage range, resulting in a low stone removal rate.

[0023] like Figures 1 to 5 As shown, the embodiment of the present application discloses a front end assembly of an endoscope, including a front end seat 100 and an instrument tube 200, wherein a receiving space 110 is provided in the front end seat 100, and a first instrument port 101 and a second instrument port 102 are provided at intervals on the front end seat 100, and the first instrument port 101 and the second instrument port 102 are both connected to the receiving space 110, and the distal end of the instrument tube 200 extends into the receiving space 110. Specifically, the front end seat 100 is located at the distal end of the insertion portion, and a camera module installation position may be provided in the front end seat 100 for installing the camera module, through which the lesion can be observed, and the first instrument port 101 and the second instrument port 102 are provided on the outer surface of the camera module; the instrument tube 200 is used to insert medical instruments such as biopsy forceps, snares, and lithotripsy tools, and liquids can also be injected into the human body through the instrument tube 200.

[0024] It should be noted that the front end seat 100 of the present application can be installed at the distal end of the active bending section of the endoscope, and the active bending section can be bent to drive the front end seat 100 to swing. The first instrument port 101 and the second instrument port 102 here can be respectively located on both sides of the front end seat 100 along its own swinging direction, and the first instrument port 101 and the second instrument port 102 can be relatively arranged or staggered.

[0025] The instrument tube 200 can move relative to the front end seat 100 to switch between the first position and the second position. When the instrument tube 200 is in the first position, a first instrument passage is formed between the proximal opening of the instrument tube 200 and the first instrument port 101. That is, the medical device inserted from the proximal opening of the instrument tube 200 can enter the first instrument passage and be guided to the first instrument port 101 by the first instrument passage to extend from the first instrument port 101 to perform the corresponding surgical operation. It should be noted that when the instrument tube 200 is in the first position, the medical device will only be guided to the first instrument port 101 by the first instrument passage, and cannot be guided to the second instrument port 102.

[0026] When the instrument tube 200 is located in the second position, a second instrument passage is formed between the proximal opening of the instrument tube 200 and the second instrument port 102, that is, the medical device inserted from the proximal opening of the instrument tube 200 can enter the second instrument passage and be guided to the second instrument port 102 by the second instrument passage, so as to be extended from the second instrument port 102 to perform the corresponding surgical operation; it should be noted that, when the instrument tube 200 is located in the second position, the medical device will only be guided to the second instrument port 102 by the second instrument passage, and cannot be guided to the first instrument port 101.

[0027] In the present application, the front end seat 100 is provided with a first instrument port 101 and a second instrument port 102, and the instrument tube 200 can be switched between a first position and a second position. In the first position, a first instrument passage is formed between the proximal opening of the instrument tube 200 and the first instrument port 101, and medical instruments such as lithotripsy tools can pass through the instrument tube 200 from the first instrument port 101 for surgery; in the second position, a second instrument passage is formed between the proximal opening of the instrument tube 200 and the second instrument port 102, and medical instruments such as lithotripsy tools can pass through the instrument tube 200 from the second instrument port 102 for surgery. It can be seen that the present application can provide two different extension angles and directions for medical instruments through the first instrument port 101 and the second instrument port 102, so that the medical instruments can be flexibly extended into various areas in the human body to increase the coverage area of ​​the medical instruments, that is, medical instruments such as lithotripsy tools can reach more areas in the human body, thereby solving the problem that stones cannot be effectively crushed or removed and the stone removal rate is low in the related art.

[0028] In some embodiments, the instrument tube 200 may include a main tube, a first branch tube, a second branch tube, a first opening and closing piece, and a second opening and closing piece. The distal end of the main tube extends into the accommodating space 110, and the first branch tube and the second branch tube are both connected to the distal end of the main tube. The first branch tube is arranged corresponding to the first instrument port 101, and the second branch tube is arranged corresponding to the second instrument port 102.

[0029] A first opening and closing member is provided at the first connection between the first branch pipe and the main pipe, and the first opening and closing member can move relative to the front end seat 100 and can control the on and off of the first connection; a second opening and closing member is provided at the connection between the second branch pipe and the main pipe, and the second opening and closing member can move relative to the front end seat 100 and can control the on and off of the second connection.

[0030] When the instrument tube 200 is in the first position, the first opening and closing piece is in the on state, and the second opening and closing piece is in the off state. At this time, the main tube, the first branch tube and the first instrument port 101 form a first instrument passage, and the medical instrument cannot enter the second branch tube due to the obstruction of the second opening and closing piece. The second opening and closing piece here can also provide guidance for the medical instrument to enter the first branch tube; similarly, when the instrument tube 200 is in the second position, the second opening and closing piece is in the on state, and the first opening and closing piece is in the off state. At this time, the main tube, the second branch tube and the second instrument port 102 form a second instrument passage, and the medical instrument cannot enter the first branch tube due to the obstruction of the first opening and closing piece. The first opening and closing piece here can also provide guidance for the medical instrument to enter the second branch tube.

[0031] The previous embodiment improves the basic shape of the instrument tube 200 so that the instrument tube 200 has two outlets, and the two outlets correspond to the two instrument ports respectively. Of course, other methods can be used without changing the basic shape of the instrument tube 200 so that the instrument tube 200 still has only one outlet. In this case, a deformation memory alloy can be prefabricated at the distal end of the instrument tube 200 so that the distal end of the instrument tube 200 can swing, so as to achieve the purpose of setting the distal end opening of the instrument tube 200 corresponding to the first instrument port 101 and the purpose of setting the distal end opening of the instrument tube 200 corresponding to the second instrument port 102.

[0032] The previous embodiment requires that the deformation memory alloy be prefabricated at the distal end of the instrument tube 200, and that electricity be supplied to drive the distal end of the instrument tube 200 to swing. In order to simplify the structure of the instrument tube 200, in an optional embodiment, the instrument tube 200 has a first form in which the distal end thereof is bent, and the instrument tube 200 in the first form can rotate between the first position and the second position, so that the distal opening of the instrument tube 200 is arranged correspondingly to the first instrument port 101 or the second instrument port 102. Exemplarily, the distal opening of the instrument tube 200 is arranged correspondingly to the first instrument port 101, or the distal opening of the instrument tube 200 does not extend into the first instrument port 101 but faces the first instrument port 101; the understanding of "the distal opening of the instrument tube 200 is arranged correspondingly to the second instrument port 102" is similar, and this application will not elaborate on it.

[0033] In the present application, the instrument tube 200 has a first form. In the first form, the distal end of the instrument tube 200 is bent. Therefore, rotating the instrument tube 200 can change the direction of the distal end opening of the instrument tube 200, so that the instrument tube 200 can be set corresponding to the first instrument port 101 or the instrument tube 200 can be set corresponding to the second instrument port 102. For details, please refer to Figure 2 and Figure 3 In this way, there is no need to change the shape of the instrument tube 200 , nor is there any need to integrate a deformation memory alloy on the instrument tube 200 , thereby simplifying the structure of the instrument tube 200 .

[0034] To prevent the instrument tube 200 from rotating too far, refer to Figure 5 In an optional embodiment, a first limiting portion 120 is formed in the accommodating space 110 , and when the instrument tube 200 rotates to the first position, the first limiting portion 120 stops and limits the instrument tube 200 .

[0035] In this embodiment, during the process of the instrument tube 200 rotating from the second position to the first position, the first limit portion 120 can stop and limit it, and when stopping and limiting, the instrument tube 200 is exactly located in the first position, so that the distal opening of the instrument tube 200 can be set corresponding to the first instrument port 101.

[0036] And / or, in an optional embodiment, a second limiting portion 130 is formed in the accommodating space 110 , and when the instrument tube 200 rotates to the second position, the second limiting portion 130 stops and limits the instrument tube 200 .

[0037] In this embodiment, during the process of the instrument tube 200 rotating from the first position to the second position, the second limit portion 130 can stop and limit it, and when stopping and limiting, the instrument tube 200 is exactly located in the second position, so that the distal opening of the instrument tube 200 can be set corresponding to the second instrument port 102.

[0038] In some endoscope application scenarios, the endoscope will be inserted into the ureter. Considering the limited size of the ureter, the size of the insertion part of the endoscope is extremely thin, and engineers are constantly studying how to make the size of the insertion part of the endoscope smaller, which is an urgent problem to be solved in clinical practice. However, while reducing the size of the insertion part, the size of the instrument tube 200 in the insertion part must be large enough. The reason is that in the operation of removing stones with an endoscope, after the stone is broken by a holmium laser or a thulium laser, water is injected into the instrument tube 200. After the water is injected into the renal calyx and mixed with the broken stone, it is sucked out from the gap between the negative pressure suction sheath and the endoscope. In order to complete the operation within a limited time, a certain water injection flow rate needs to be guaranteed to increase the speed at which the stone is sucked out. However, when the flow rate is constant, when the size of the instrument tube 200 is small, the speed of the water jet is large, thereby impacting the renal calyx tissue, causing damage, and prolonging the recovery time of the operator.

[0039] In order to reduce the risk of liquid sprayed from the instrument tube 200 damaging human tissue, in an optional embodiment, the instrument tube 200 can also switch from the first position or the second position to the third position. When the instrument tube 200 is in the third position, the first part of the distal opening of the instrument tube 200 is arranged corresponding to the first instrument port 101, and the second part of the distal opening of the instrument tube 200 is arranged corresponding to the second instrument port 102.

[0040] In the present embodiment, the instrument tube 200 can be switched to the third position, at which time the distal opening of the instrument tube 200 is simultaneously connected to the first instrument port 101 and the second instrument port 102, and the liquid injected into the instrument tube 200 will flow out from the first instrument port 101 and the second instrument port 102. When the first instrument port 101 and the second instrument port 102 are simultaneously provided on the front end seat 100, the flow area of ​​the liquid is obviously larger than the flow area when the front end seat 100 is provided with only one instrument port. When the flow rate is constant, the larger the flow area, the smaller the flow rate. Therefore, the present embodiment can reduce the speed at which the liquid is sprayed out from the front end seat 100, thereby reducing the risk of liquid damaging human tissue.

[0041] It should be noted that when this embodiment is combined with the embodiment of "the distal end of the instrument tube 200 is prefabricated with deformation memory alloy so that the distal end of the instrument tube 200 can swing", the distal end of the instrument tube 200 can swing to the third position.

[0042] In addition, by adopting the technical solution of "the instrument tube 200 includes a main tube, a first branch tube, a second branch tube, a first opening and closing piece, and a second opening and closing piece", the instrument tube 200 can also be switched to a third position. In the third position, the first opening and closing piece and the second opening and closing piece are both in a conducting state; at this time, the distal opening of the instrument tube 200 includes the distal opening of the first branch tube and the distal opening of the second branch tube.

[0043] In an optional embodiment, the distal end of the instrument tube 200 is elastic, and the instrument tube 200 can move along a first direction relative to the front end seat 100 to switch from the first position or the second position to the third position, and the first direction is the direction extending from the distal end to the proximal end of the front end seat 100.

[0044] In this embodiment, the instrument tube 200 can be moved from the first position or the second position to the third position by controlling the instrument tube 200 to move along the first direction. In this way, switching the position of the instrument tube 200 is relatively simple, and there is no need to set a deformation memory alloy at the distal end of the instrument tube 200, which can simplify the structure of the instrument tube 200.

[0045] In some embodiments, the accommodating space 110 includes a constraint track, which extends along the circumference of the front end seat 100. The distal end of the instrument tube 200 extends into the constraint track and slides with it. During the rotation of the instrument tube 200 between the first position and the second position, the constraint track can always constrain the instrument tube 200 to a first state of bending deformation; when the instrument tube 200 moves along the first direction and disengages from the constraint track, the instrument tube 200 returns to a natural state and is in a third position.

[0046] The previous embodiment will make the structure of the front end seat 100 more complicated. In order to simplify the structure of the front end seat 100, in an optional embodiment, the instrument tube 200 is in the first form and in the first position in a natural state, that is, the instrument tube 200 is prefabricated and bent, and the accommodating space 110 includes a constraint channel 111. When the instrument tube 200 is switched to the third position, the distal end of the instrument tube 200 is located in the constraint channel 111 and fits against the inner wall of the constraint channel 111 to be in the second form.

[0047] In this embodiment, the accommodation space 110 includes a constraint channel 111. When the instrument tube 200 moves along the first direction, the distal end of the instrument tube 200 gradually enters the constraint channel 111 and is constrained by the inner wall of the constraint channel 111. The distal end of the instrument tube 200 automatically adapts to the shape of the constraint channel 111, so that the instrument tube 200 undergoes elastic deformation to be in the second form. At this time, the distal end opening of the instrument tube 200 is simultaneously connected to the first instrument port 101 and the second instrument port 102. In addition, the constraint channel 111 itself is part of the accommodation space 110. The instrument tube 200 needs to enter the accommodation space 110 through the constraint channel 111. Compared with setting a constraint track in the front end seat 100, this embodiment can simplify the structure of the front end seat 100.

[0048] Furthermore, the constraint channel 111 is straight, so that the second form of the instrument tube 200 is straight, the first portion of the constraint channel 111 is arranged opposite to the first instrument opening 101 , and the second portion of the constraint channel 111 is arranged corresponding to the second instrument opening 102 .

[0049] Optionally, the front end seat 100 may include a seat body 140 and a restraining tube 150, wherein the restraining tube 150 is inserted into the seat body 140, and the proximal end of the restraining tube 150 axially protrudes from the proximal end surface of the seat body 140, and the restraining channel 111 is formed in the restraining tube 150. When this embodiment is combined with the embodiment in which the elastic member 300 is an elastic sleeve, the distal end of the elastic sleeve is sleeved and fixed on the restraining tube 150, and the sleeved and fixed part between the proximal end of the elastic sleeve and the instrument tube 200 is located on the proximal side of the restraining tube 150.

[0050] In an optional embodiment, the front end assembly also includes an elastic member 300, both ends of which are respectively connected to the instrument tube 200 and the front end seat 100, and the elastic member 300 can drive the instrument tube 200 to move from the third position to the first position or the second position.

[0051] In this embodiment, in the process of applying a force in the first direction to the instrument tube 200 to control the instrument tube 200 to move along the first direction, the elastic member 300 will undergo elastic deformation, so after the instrument tube 200 is released, the elastic member 300 will restore the elastic deformation, thereby applying a force in the opposite direction of the first direction to the instrument tube 200, so that the instrument tube 200 is reset from the third position to the first position or the second position. It can be seen that in this embodiment, after the instrument tube 200 is released, the instrument tube 200 will automatically reset to the first position or the second position, which can simplify the operation process of the front-end component. Of course, in addition to setting the elastic member 300, a manual reset method can also be used to move the elastic member 300 in the opposite direction of the first direction, so that the instrument tube 200 moves from the third position to the first position or the second position.

[0052] It should be noted that there are two types of connection relationships between the elastic member 300 and the instrument tube 200. The first type is that the elastic member 300 is in contact with the instrument tube 200, but the two are not fixed, and the instrument tube 200 can rotate relative to the elastic member 300. During the rotation of the instrument tube 200, it will rotate relative to the elastic member 300. The second type is that the elastic member 300 is fixedly connected to the instrument tube 200. In this case, the elastic member 300 is twistable, and during the rotation of the instrument, it will be twisted and deformed, such as the elastic sleeve described below.

[0053] In an optional embodiment, when the instrument tube 200 is located at the first position or the second position, the instrument tube 200 cooperates with the front end seat 100 in an upper limit position in the opposite direction of the first direction, and the elastic member 300 is in a deformed state.

[0054] In this embodiment, when the instrument tube 200 is located in the first position or the second position, the elastic member 300 is in a deformed state, thereby applying a force in the opposite direction of the first direction to the instrument tube 200, so that the instrument tube 200 abuts against the front end seat 100. In this way, when the instrument tube 200 moves to the third position, the deformation of the elastic member 300 will be greater, and the force in the opposite direction of the first direction applied by the elastic member 300 to the instrument tube 200 will be greater, thereby making the resetting effect of the instrument tube 200 better, thereby ensuring that the instrument tube 200 switches to the first position or the second position.

[0055] And / or, in an optional embodiment, the elastic member 300 is an elastic sleeve, and the elastic sleeve seals the gap between the instrument tube 200 and the front end seat 100 .

[0056] Since the instrument tube 200 needs to suck the body fluid, the body fluid is sucked from the first instrument port 101 and / or the second instrument port 102, and part of the fluid may enter the gap between the instrument tube 200 and the front end seat 100, thereby leaking out of the instrument tube 200, and the instrument tube 200 is located in the active bending section of the endoscope, so the fluid may corrode the active bending section. Therefore, in this embodiment, the elastic member 300 is set as an elastic sleeve, and the elastic sleeve can seal the gap between the instrument tube 200 and the front end seat 100, thereby preventing the fluid from leaking out of the instrument tube 200 through the gap, thereby solving the problem of liquid corroding the active bending section. It can be seen that the elastic sleeve of this embodiment can not only drive the instrument tube 200 to reset, but also solve the problem of liquid corroding the active bending section, thereby achieving the purpose of one object with multiple uses.

[0057] In an optional embodiment, the distal end of the front end seat 100 has a first guide surface 103 and a second guide surface 104, the first guide surface 103 and the second guide surface 104 are respectively located on opposite sides of the front end seat 100, and both are connected to the distal end surface of the front end seat 100, the first instrument port 101 is arranged on the first guide surface 103, and the second instrument port 102 is arranged on the second guide surface 104, and the distance between the first guide surface 103 and the second guide surface 104 gradually decreases in the direction extending from the proximal end to the distal end of the front end seat 100.

[0058] In this embodiment, the distal end of the front seat 100 has a first guide surface 103 and a second guide surface 104, and the distance between the first guide surface 103 and the second guide surface 104 gradually decreases along the direction extending from the proximal end to the distal end of the front seat 100, which can make the distal end of the front seat 100 have a smaller size, thereby facilitating the insertion of the front seat 100 into the human body. In addition, the distance between the first guide surface 103 and the second guide surface 104 is reduced, so at least one of the two will be inclined relative to the axis of the front seat 100, which will make the first guide surface 103 and / or the second guide surface 104 have a larger area, thereby increasing the area of ​​the first instrument port 101 and / or the second instrument port 102, thereby reducing the flow rate of the liquid sprayed from the instrument tube 200, so as to reduce the risk of the liquid damaging the inner wall of the tissue. Of course, the first instrument port 101 and the second instrument port 102 can also be arranged on the distal end surface of the front seat 100, and this application is not limited to this.

[0059] Further, the first guide surface 103 and the second guide surface 104 can be inclined relative to the axial direction of the front end seat 100, so as to further reduce the distal end size of the front end seat 100. Here, the first guide surface 103 can be an inclined surface, a curved surface, etc., and the second guide surface 104 can also be an inclined surface, a curved surface, etc.

[0060] The embodiment of the present application also discloses an endoscope, including the front-end assembly described in any of the above embodiments, so that the endoscope has the beneficial effects of the above-mentioned front-end assembly, which will not be repeated here. The endoscope referred to in the embodiment of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiment of the present application does not specifically limit the type of endoscope.

[0061] The above embodiments of the present application focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here. The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present application, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present application and the claims, all of which are within the protection of the present application.

Claims

1. A front end assembly of an endoscope, characterized in that: The device comprises a front end seat (100) and an instrument tube (200), wherein a receiving space (110) is provided in the front end seat (100), a first instrument opening (101) and a second instrument opening (102) are provided on the front end seat (100) at intervals, the first instrument opening (101) and the second instrument opening (102) are both connected to the receiving space (110), and the distal end of the instrument tube (200) extends into the receiving space (110); The instrument tube (200) is movable relative to the front end seat (100) to switch between a first position and a second position; when the instrument tube (200) is located at the first position, a first instrument passage is formed between the proximal opening of the instrument tube (200) and the first instrument port (101); when the instrument tube (200) is located at the second position, a second instrument passage is formed between the proximal opening of the instrument tube (200) and the second instrument port (102); The instrument tube (200) is capable of switching from the first position or the second position to a third position. When the instrument tube (200) is located at the third position, a first portion of the distal opening of the instrument tube (200) is arranged corresponding to the first instrument port (101), and a second portion of the distal opening of the instrument tube (200) is arranged corresponding to the second instrument port (102); The distal end of the instrument tube (200) is elastic, and the instrument tube (200) can move relative to the front end seat (100) along a first direction to switch from the first position or the second position to the third position, wherein the first direction is a direction extending from the distal end to the proximal end of the front end seat (100); The instrument tube (200) can be used for inserting medical instruments or for injecting liquids.

2. The front end assembly according to claim 1, characterized in that: The instrument tube (200) has a first form in which its distal end is bent, and the instrument tube (200) in the first form can be rotated between the first position and the second position, so that the distal opening of the instrument tube (200) is arranged corresponding to the first instrument opening (101) or the second instrument opening (102).

3. The front end assembly according to claim 2, characterized in that: A first limiting portion (120) is formed in the accommodating space (110), and when the instrument tube (200) is rotated to the first position, the first limiting portion (120) stops and limits the instrument tube (200); and / or, A second limiting portion (130) is formed in the accommodating space (110), and when the instrument tube (200) is rotated to the second position, the second limiting portion (130) stops and limits the instrument tube (200).

4. The front end assembly according to claim 2, characterized in that: The instrument tube (200) is in the first form and in the first position in a natural state, and the accommodating space (110) includes a constraint channel (111). When the instrument tube (200) is switched to the third position, the distal end of the instrument tube (200) is located in the constraint channel (111) and fits against the inner wall of the constraint channel (111) to be in the second form.

5. The front end assembly according to claim 1 or 4, characterized in that: The front end assembly further comprises an elastic member (300), the two ends of which are respectively connected to the instrument tube (200) and the front end seat (100), and the elastic member (300) is capable of driving the instrument tube (200) to move from the third position to the first position or the second position.

6. The front end assembly according to claim 5, characterized in that When the instrument tube (200) is located at the first position or the second position, the instrument tube (200) cooperates with the front end seat (100) in an upper limit position in the direction opposite to the first direction, and the elastic member (300) is in a deformed state; and / or, The elastic member (300) is an elastic sleeve, and the elastic sleeve seals the gap between the instrument tube (200) and the front end seat (100).

7. The front end assembly according to claim 1, characterized in that: The distal end of the front end seat (100) has a first guide surface (103) and a second guide surface (104); the first guide surface (103) and the second guide surface (104) are respectively located on opposite sides of the front end seat (100) and are both connected to the distal end surface of the front end seat (100); the first instrument port (101) is provided on the first guide surface (103), and the second instrument port (102) is provided on the second guide surface (104); In a direction extending from the proximal end to the distal end of the front end seat (100), the distance between the first guide surface (103) and the second guide surface (104) gradually decreases.

8. An endoscope, characterized in that: Comprising a front end assembly as claimed in any one of claims 1 to 7.

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