Endoscope and front end assembly and insertion part thereof

Abstract

The invention discloses an endoscope and a front-end assembly and an insertion part thereof, and relates to the field of medical instruments.The front-end assembly comprises a front-end shell, an acupuncture mechanism, an elastic bag body and a triggering piece, the front-end shell is provided with a movable cavity, an opening is formed in the far end of the front-end shell and communicates with the movable cavity, and the acupuncture mechanism is arranged in the movable cavity in a sliding mode; the needling mechanism is provided with a through hole penetrating through the two opposite ends, a storage cavity is formed in the elastic bag body and stores media, and the trigger piece is located between the movable cavity and the elastic bag body and used for opening or closing the movable cavity. And the elastic bag body can inject a medium into the movable cavity of the front end shell. The medium can push the needling mechanism so that the needling mechanism can stretch out of the opening, and the needling effect of the endoscope is achieved. In the elastic bag body, the pressure of the medium is controllable and stable, the pushing effect of the medium on the front end shell is changed by changing the preset pressure value of the medium, the device is suitable for different human body cavities, and the situation that the device cannot be punctured into the inner wall of the cavity or punctured through the inner wall of the cavity is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an endoscope and a front end component and an insertion part thereof. Background Art

[0002] Endoscope is a commonly used medical device. It is an inspection device that can directly enter the natural cavity of the human body and provide doctors with sufficient diagnostic information to treat diseases. Endoscopic acupuncture injection technology is an advanced medical technology that combines the direct observation of the endoscope with the precise operation of acupuncture injection. It is mainly used for injection into lesions in the digestive tract, bladder and other internal cavities.

[0003] The acupuncture effect of the existing endoscope is poor. Because the acupuncture mechanism encounters different resistances in different cavities, such as the bladder has expandable characteristics, the acupuncture mechanism encounters different resistances in the bladder and the digestive tract. However, the acupuncture mechanism applies the same pressure, and there may be situations where it cannot penetrate the inner wall of the cavity or puncture through, which will seriously reduce the implementation effect and efficiency of the endoscope. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned related technologies, the present application provides an endoscope and its front end component and insertion part to solve the above-mentioned technical problems.

[0005] The present application provides a front end assembly of an endoscope, the front end assembly includes a front end shell, a puncture mechanism, an elastic capsule and a trigger, the front end shell has an active cavity, the distal end of the front end shell is provided with an opening, the opening is communicated with the active cavity, the puncture mechanism is slidably arranged in the active cavity, the puncture mechanism has through holes penetrating opposite ends, the elastic capsule has a storage cavity, the storage cavity stores a medium, the trigger is located between the active cavity and the elastic capsule, and the trigger is used to open or close the active cavity; When the trigger opens the active cavity, the elastic sac injects a medium with a preset pressure value into the active cavity, and the medium pushes the puncture mechanism so that the distal end of the puncture mechanism extends out of the opening, and the medium can flow to the distal end of the puncture mechanism through the through hole.

[0006] In one embodiment of the present application, the front end component also includes an injection tube, which is connected to the storage cavity and has an injection hole, which is used to inject a medium into the storage cavity to adjust the storage pressure value in the storage cavity.

[0007] In one embodiment of the present application, the trigger member includes a sealing plug and a first driving rope, the sealing plug seals the activity chamber, the first driving rope is connected to the sealing plug, and the first driving rope is used to drive the sealing plug to move in a direction away from the activity chamber to open the activity chamber; Alternatively, the triggering member is a membrane flap, which closes the active cavity. When the storage pressure value is greater than or equal to the preset pressure value, the triggering member opens the active cavity to allow the medium to be injected into the active cavity.

[0008] In one embodiment of the present application, the injection pipe and the first driving rope are integrated into one.

[0009] In one embodiment of the present application, when the volume of the storage cavity is equal to the preset volume, the storage pressure value in the elastic bladder is equal to the preset pressure value.

[0010] In one embodiment of the present application, the acupuncture mechanism includes an injection needle and a piston member, the piston member is connected to the proximal end of the injection needle, the through hole runs through the distal end of the injection needle and the proximal end of the piston member, and the piston member is slidably fitted in the movable cavity.

[0011] In one embodiment of the present application, the piston member has a limiting portion, and the inner wall of the movable cavity is provided with a limiting groove, and the limiting portion and the limiting groove are limitedly matched; A limiting block is arranged in the limiting groove, and the limiting block is located in the movable path of the limiting part, and the limiting block is used to adjust the maximum extension length of the injection needle relative to the opening.

[0012] In one embodiment of the present application, the front end shell also includes a second driving rope and an elastic driving member, one end of the limit block is connected to the second driving rope, and the other end is connected to the elastic driving member, the end of the elastic driving member away from the limit block is connected to the groove wall forming the limit groove, and the second driving rope is used to adjust the relative position of the limit block in the limit groove.

[0013] In one embodiment of the present application, two opposite ends of the hole wall forming the opening are chamfered.

[0014] In one embodiment of the present application, the injection needle has a channel suitable for the flowing medium, and the cross-sectional area ratio between the channel and the active cavity is 1:12-1:5.

[0015] In one embodiment of the present application, the peripheral wall of the piston is configured as an arc surface.

[0016] To achieve the above-mentioned purpose and other related purposes, the present application provides an insertion portion, characterized in that it includes a front end component as described above.

[0017] To achieve the above-mentioned purpose and other related purposes, the present application provides an endoscope, characterized in that it includes the insertion portion as described above.

[0018] The technical solution adopted by the present invention can achieve the following beneficial effects: the acupuncture mechanism can be slidably arranged in the front end shell, and the elastic capsule can inject the medium into the active cavity of the front end shell. The medium can push the acupuncture mechanism so that the acupuncture mechanism can extend out of the opening to achieve the acupuncture effect of the endoscope. In addition, in the elastic capsule, the pressure of the medium is controllable and stable. By changing the preset pressure value of the medium, the pushing effect of the medium on the front end shell can be changed, so as to adapt to different human cavities, avoid the situation that the inner wall of the cavity cannot be pierced or pierced, and significantly improve the implementation effect and efficiency of the front end component. In addition, the distal end of the acupuncture mechanism extends out of the opening, and the medium can continue to flow toward the through hole, so that the medium can be automatically injected into the acupuncture mechanism, realizing the automatic injection operation, reducing the injection operation steps of the front end component, and further improving the working efficiency of the front end component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 is a schematic structural diagram of an insertion portion of an endoscope shown in an exemplary embodiment of the present application; Figure 2 is a schematic structural diagram of a front-end component shown in an exemplary embodiment of the present application; Figure 3 is a schematic structural diagram of another front-end component shown in an exemplary embodiment of the present application; Figure 4 is a schematic structural diagram of another insertion portion shown in an exemplary embodiment of the present application; Figure 5 is a structural schematic diagram of another front-end component shown in an exemplary embodiment of the present application; Figure 6 is a schematic structural diagram of a front-end assembly and an injection pipe shown in an exemplary embodiment of the present application; Figure 7 is a structural schematic diagram of yet another front-end component shown in an exemplary embodiment of the present application; Figure 8 is a schematic structural diagram of an acupuncture mechanism and a front end shell shown in an exemplary embodiment of the present application; Fig. 9 yes Figure 8 The enlarged view of point a in the figure; Fig.10It is a schematic diagram of the structure of an endoscope shown in an exemplary embodiment of the present application.

[0021] In the figure: 1, endoscope; 100, front end assembly; 110, front end shell; 111, active cavity; 112, opening; 113, limiting groove; 114, second drive rope; 115, elastic drive member; 116, limiting block; 117, connecting channel; 120, acupuncture mechanism; 121, injection needle; 1211, through hole; 122, piston member; 1221, limiting part; 130, trigger member; 131, sealing plug; 132, first drive rope; 140, elastic capsule; 141, storage cavity; 150, injection tube; 151, injection hole; 160, camera module; 200, insertion part; 210, active bending section. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component 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".

[0025] The present application provides a front end assembly 100 of an endoscope 1, see Figure 1, the following content is referred to as the front-end component 100. Furthermore, the front-end component 100 is used for the endoscope 1, and the endoscope 1 may include an insertion portion 200, and the front-end component 100 may be arranged at the distal end of the insertion portion 200, and the insertion portion 200 may also be provided with an active bending section 210, and the distal end of the active bending section 210 is connected to the front-end component 100. Under the operation of medical staff, the active bending section 210 can rotate in different directions, and the front-end component 100 will face different orientations accordingly. In addition, the front-end component 100 may also include a camera module 160, and the camera module 160 can observe the front image of the extended front-end component 100, etc., to prevent other substances from hindering the movement of the front-end component 100.

[0026] See also Figure 2 The front end assembly 100 may include a front end shell 110 , a puncture mechanism 120 , a trigger 130 and an elastic capsule 140 . The puncture mechanism 120 is disposed on the front end shell 110 , and the elastic capsule 140 connects the front end shell 110 and the trigger 130 .

[0027] Please continue reading Figure 2 The front end shell 110 has an active cavity 111, and the active cavity 111 can extend from the proximal end to the distal end of the front end assembly 100. The distal end of the front end shell 110 is provided with an opening 112, and the opening 112 can pass at least part of the acupuncture mechanism 120, and the opening 112 is connected to the active cavity 111. The acupuncture mechanism 120 is slidably disposed in the active cavity 111, and the acupuncture mechanism 120 has a through hole 1211 penetrating through the opposite ends, and the through hole 1211 can be a path for a medium (such as physiological saline, distilled water or other drugs, etc.).

[0028] The puncture mechanism 120 can extend out of or be stored in the active cavity 111. The puncture mechanism 120 can extend out of the opening 112 when in use, that is, when an injection is required, the puncture mechanism 120 will quickly extend out of the opening 112 and accurately pierce the target tissue. The puncture mechanism 120 can be stored in the active cavity 111 when not in use. When the endoscope 1 is extended into the cavity, the puncture mechanism 120 will be stored in the active cavity 111 to avoid scratching the inner wall of the cavity by the puncture mechanism 120. In addition, this setting can also reduce the interference of the puncture mechanism 120 with the field of view of the camera module 160.

[0029] Please continue reading Figure 2, the elastic capsule 140 has a storage cavity 141, and the storage cavity 141 stores the medium. The storage cavity 141 of the elastic capsule 140 can accommodate and store a preset volume of medium. Since the elastic capsule 140 itself has a certain elasticity. When the medium is injected, it will deform. This deformation causes the medium to be compressed in the capsule, and the pressure of the medium increases. This setting not only ensures that the medium can be released quickly and stably when needed, but also makes the pressure of the medium in the elastic capsule 140 equal to the preset pressure value. The trigger member 130 is located between the active cavity 111 and the elastic capsule 140, and the trigger member 130 is used to open or close the active cavity 111. Figure 2 As shown, when the trigger member 130 closes the active cavity 111, the connection channel 117 between the active cavity 111 and the elastic capsule 140 is closed, and the medium cannot flow out to the active cavity 111 and push the acupuncture mechanism 120. Figure 3 As shown, when the trigger 130 opens the active cavity 111, the elastic capsule 140 injects a medium with a preset pressure value into the active cavity 111. The constant pressure ensures that the medium can provide a constant and controllable thrust when pushing the acupuncture mechanism 120, ensuring that the acupuncture mechanism 120 can move to a specified position, such as Figure 4 As shown, the puncture mechanism 120 can puncture the target tissue b (i.e., the affected area or its adjacent location, etc.), avoiding excessive puncture or non-puncture, and optimizing the puncture effect of the puncture mechanism 120.

[0030] See also Figure 5 , the medium pushes the puncture mechanism 120 so that the distal end of the puncture mechanism 120 extends out of the opening 112, and the medium can flow to the distal end of the puncture mechanism 120 through the through hole 1211. Moreover, when the puncture mechanism 120 moves to the designated position, the medium flows out through the through hole 1211 on the puncture mechanism 120, ensuring that the medium can be directly injected into the target tissue, thereby achieving effective injection. This setting enables the medium to continue to flow toward the through hole 1211 after the distal end of the puncture mechanism 120 extends out of the opening 112, so that the medium can be automatically injected into the puncture mechanism 120, realizing an automatic injection operation, reducing the injection operation steps of the front-end assembly 100, and further improving the working efficiency of the front-end assembly 100.

[0031] In one embodiment, see Figure 6 as well as Figure 7 The front end assembly 100 may further include an injection tube 150, which is in communication with the storage cavity 141 and has an injection hole 151 extending through the wall of the injection tube 150. The injection tube 150 can inject the medium into the storage cavity 141 from the proximal end of the endoscope 1. Figure 6 FIG. 1 shows a schematic structural diagram of the front-end assembly 100 before the injection pipe 150 injects the medium into the storage chamber 141 . Figure 7The schematic diagram of the structure of the front-end assembly 100 after the injection tube 150 injects the medium into the storage chamber 141 is shown. The injection hole 151 is used to inject the medium into the storage chamber 141 to adjust the storage pressure value in the storage chamber 141. The medical staff adjusts the pressure value in the storage chamber 141 by controlling the amount of the injected medium. The change in the pressure value in the storage chamber 141 directly affects the thrust of the medium on the acupuncture mechanism 120. The medical staff can change the thrust by adjusting the pressure value in the storage chamber 141, thereby controlling the extension speed and distance of the acupuncture mechanism 120.

[0032] For example, when the puncture mechanism 120 requires a larger thrust to penetrate a thicker tissue, the medical staff can increase the amount of the injected medium to increase the pressure value in the storage chamber 141, thereby increasing the thrust of the medium on the puncture mechanism 120. On the contrary, when the puncture mechanism 120 requires a smaller thrust or a more delicate operation, the medical staff can reduce the amount of the injected medium to reduce the pressure value in the storage chamber 141, thereby reducing the thrust. The injection tube 150 can bring more flexible and adaptable operating characteristics to the front end assembly 100.

[0033] It is understandable that the deformation of the elastic capsule 140 is affected by the volume or material of the medium inside. In the elastic capsule 140 of the same material, the larger the volume of the medium, the larger the deformation of the elastic capsule 140, and the larger the internal storage pressure value. Among them, the storage pressure value inside the elastic capsule 140 can be the pressure value of the medium inside the elastic capsule 140. When the volume of the storage cavity 141 is equal to the preset volume, the storage pressure value inside the elastic capsule 140 is equal to the preset pressure value. This setting can cause the volume of the storage cavity 141 to directly affect the pressure of the elastic capsule 140. By adjusting the volume of the medium in the storage cavity 141, the storage pressure value is adjusted. This setting can ensure that the pressure value is controllable, ensuring that the medium can provide a constant and controllable thrust when pushing the acupuncture mechanism 120, and ensuring that the acupuncture mechanism 120 can move to a specified position.

[0034] In one embodiment, the trigger member 130 may include a sealing plug 131 and a first driving rope 132, wherein the sealing plug 131 seals the active chamber 111. Figure 2 as well as Figure 3 , Figure 2 The schematic diagram of the structure of the sealing plug 131 closing the connecting channel 117 is shown. Figure 3 The schematic diagram shows the structure of the sealing plug 131 opening the connection channel 117. The connection channel 117 is provided between the active cavity 111 and the elastic capsule 140, and the sealing plug 131 can be inserted into the connection channel 117 from the proximal end to the distal end of the endoscope 1 to close the active cavity 111.

[0035] Please continue reading Figure 2 as well as Figure 3 , the first driving rope 132 is connected to the sealing plug 131, and the first driving rope 132 is used to drive the sealing plug 131 to move in a direction away from the active cavity 111 to open the active cavity 111. Exemplarily, the proximal end of the first driving rope 132 can extend to the proximal end of the endoscope 1, and the medical staff can pull the first driving rope 132, and the first driving rope 132 drives the sealing plug 131 to move in a direction from the distal end to the proximal end of the endoscope 1 to open the active cavity 111. The medium can enter the active cavity 111. The first driving rope 132 can enable the puncture operation of the acupuncture mechanism 120 and the controllable operation of the medium.

[0036] Preferably, the injection tube 150 is integrated with the first drive rope 132. In other words, the injection tube 150 can take into account the pulling effect of the first drive rope 132 on the sealing plug 131. Exemplarily, the distal end of the injection tube 150 is connected to the sealing plug 131, and part of the injection tube 150 is located in the storage cavity 141, and the injection hole 151 is opened in the part, and the injection hole 151 is connected to the storage cavity 141, and the medium can be injected into the storage cavity 141 through the injection hole 151. In addition, the medical staff can pull the proximal end of the injection tube 150 to drive the sealing plug 131 to move, so as to open the movable cavity 111.

[0037] In another embodiment, the trigger 130 may be a membrane flap, which closes the active cavity 111. When the storage pressure value is greater than or equal to the preset pressure value, this pressure difference will overcome the closing force of the membrane flap and open it. The trigger 130 opens the active cavity 111 to allow the medium to be injected into the active cavity 111. The membrane flap can accurately control the size of the opening pressure, and the elastic capsule 140 injects the medium with a preset pressure value into the active cavity 111. The constant pressure ensures that the medium can provide a constant and controllable thrust when pushing the acupuncture mechanism 120. The design of the membrane flap as the trigger 130 not only simplifies the structure of the system, but also improves the response speed and reliability. In addition, the membrane flap has the ability of unidirectional conduction. This setting can promote the unidirectional flow of the medium, that is, the medium flows from the elastic capsule 140 to the active cavity 111, avoiding the reverse flow of the medium and affecting the pushing effect of the medium on the acupuncture mechanism 120.

[0038] In this example, please continue to refer to Figure 5The acupuncture mechanism 120 may include an injection needle 121 and a piston 122. The injection needle 121 may be an elongated tubular structure. The material of the piston 122 may be rubber or thermoplastic elastomer (TPE), etc., which is not limited in this embodiment. The piston 122 is connected to the proximal end of the injection needle 121 to ensure the synchronization of the piston 122 and the injection needle 121 during the movement process in the active cavity 111. The through hole 1211 runs through the distal end of the injection needle 121 and the proximal end of the piston 122. The through hole 1211 may be a path for the medium (such as saline, distilled water or other drugs) to be transferred from the piston 122 to the distal end of the injection needle 121. The piston 122 is slidably fitted in the active cavity 111. When the piston 122 is pushed by the medium, the piston 122 slides smoothly along the inner wall of the active cavity 111. The sliding process of the piston 122 in the active cavity 111 is not only stable but also controllable, so that the moving path of the injection needle 121 in the active cavity 111 is controllable, and the injection needle 121 can accurately slide out of the opening 112. In addition, the cooperation between the piston 122 and the active cavity 111 ensures minimum friction and maximum sealing.

[0039] Furthermore, when the piston 122 is pushed to the preset position by the medium, the distal end of the injection needle 121 just inserts into the target tissue of the human body cavity. The cavity can generate resistance to the injection needle 121, or the cavity wall of the active cavity 111 abuts against the piston 122 in the preset position, and the cavity wall can prevent the piston 122 from moving, so as to hinder the movement of the injection needle 121 and the piston 122. The medium continues to be injected into the active cavity 111, and then flows into the through hole 1211 until the distal end of the injection needle 121. At this time, the medium is ejected along the through hole 1211, completing the injection action. This setting can integrate the insertion action of the injection needle 121 and the injection operation of the medium into one operation step. This not only simplifies the operation process and improves work efficiency, but also reduces the pain and discomfort of the patient, because the insertion and injection occur almost simultaneously, reducing the time the needle tip stays in the human tissue.

[0040] See also Figure 8 as well as Fig. 9The piston 122 has a limiting portion 1221, and the inner wall of the active cavity 111 is provided with a limiting groove 113, and the limiting portion 1221 cooperates with the limiting groove 113 in a limiting manner. The limiting cooperation between the limiting portion 1221 and the limiting groove 113 ensures the stable movement of the piston 122 in the active cavity 111, prevents the piston 122 from being offset or out of control, and ensures the accurate sliding of the injection needle 121. A limiting block 116 is arranged in the limiting groove 113, and the position of the limiting block 116 is adjustable. The limiting block 116 is located in the active path of the limiting portion 1221, and plays a key regulating role. The limiting block 116 is used to adjust the maximum extension length of the injection needle 121 relative to the opening 112. When the piston 122 pushes the injection needle 121 to move forward, the limiting portion 1221 will slide along the limiting groove 113 until it encounters the limiting block 116. At this time, the limit block 116 limits the further extension of the injection needle 121 relative to the opening 112. The existence of the limit block 116 effectively prevents the extension length of the injection needle 121 from exceeding the target range. If the injection needle 121 extends too long, it may cause excessive puncture, increasing the patient's pain and risk of injury; if it extends too short, it may not be able to pierce the target tissue, resulting in injection failure. Medical staff can observe the distance between the front-end component 100 and the target position through the camera module 160 of the front-end component 100, and adjust the relative position of the limit block 116 to adjust the maximum extension length of the injection needle 121 relative to the opening 112, ensure that the injection needle 121 extends to an appropriate length, avoid the injection needle 121 extending too long or too short, and improve the injection effect of the injection needle 121.

[0041] In other words, the amount of medium increases the pressure value in the storage chamber 141, thereby increasing the thrust of the medium on the puncture mechanism 120, and the stopper 116 can limit the extension length of the puncture mechanism 120. This setting can enable the puncture mechanism 120 to have sufficient speed and force to move to the specified position, thereby improving the controllability of the puncture mechanism 120.

[0042] In one embodiment, please refer to Fig. 9, the front end shell 110 may further include a second driving rope 114 and an elastic driving member 115, one end of the limit block 116 is connected to the second driving rope 114, and the other end is connected to the elastic driving member 115. The elastic driving member 115 may be a spring or a spring sheet, etc., and this embodiment is not limited thereto. The elastic driving member 115 uses its own elastic potential energy to cause the limit block 116 to move toward the side close to the opening 112. By pulling the second driving rope 114, the medical staff can adjust the relative position of the limit block 116 in the limit groove 113, so that the limit block 116 moves toward the side away from the opening 112. The change in the relative position of the limit block 116 can change the maximum extension length of the injection needle 121 relative to the opening 112, so the second driving rope 114, the elastic driving member 115 and the limit block 116 together constitute a flexible and reliable injection needle 121 extension length adjustment system. This system not only ensures the accuracy and safety of the injection operation, but also effectively avoids the problem of over-puncture or under-puncture of the injection needle 121 by dynamically adjusting the position of the limit block 116 .

[0043] In addition, the proximal end of the second driving rope 114 can also be configured with an identification line, such as the length value of the second driving rope 114, which can indicate the telescopic length of the second driving rope 114 relative to the endoscope 1, and also indicates the position of the limit block 116. This setting facilitates the adjustment of the maximum extension length of the injection needle 121 relative to the opening 112, thereby improving the flexibility of use.

[0044] Preferably, please continue to see Fig. 9 , the opposite ends of the hole wall forming the opening 112 are chamfered. Among them, the chamfer can be a rounded corner or a chamfered angle, etc., which is not limited in this embodiment. The edge of the opening 112 can form a smooth arc surface or an inclined surface. The injection needle 121 will not be subject to sudden resistance or deflection when contacting the hole wall, but can gradually enter the hole along the direction of the inclined surface, that is, the injection needle 121 can enter the hole along a more stable path. This smooth transition reduces the friction and collision between the injection needle 121 and the hole wall, reduces the risk of damage to the injection needle 121, and also improves the accuracy and efficiency of the operation.

[0045] In this example, see Figure 5, the injection needle 121 has a channel suitable for the flow of medium. The channel can be formed by a through hole 1211 penetrating the injection needle 121. The cross-sectional area ratio between the channel and the active cavity 111 is 1:12-1:5, such as 1:12, 1:10 or 1:5, etc., which is not limited in this embodiment. The cross-sectional area ratio should not be set too small or too large. When the cross-sectional area is set too small, the channel of the injection needle 121 is small, and the medium will continue to act on the piston member 122, forcing the piston member 122 to squeeze the cavity wall of the active cavity 111 and the hole wall of the opening 112, causing the acupuncture mechanism 120 to be damaged. When the cross-sectional area is set too large, the channel of the injection needle 121 is large, and the medium will quickly flow out of the channel of the injection needle 121, resulting in the medium failing to push the piston member 122 to the specified position. An appropriate cross-sectional area ratio can balance the driving effect of the medium on the piston 122, the injection effect of the injection needle 121, etc., so that the medium can push the piston 122 to a specified position, and the medium can be quickly injected from the injection needle 121, thereby improving the use efficiency and effect of the front-end component 100.

[0046] Preferably, the piston member 122 can be interference fit with the cavity wall forming the active cavity 111, and then the piston member 122 can separate the active cavity 111 into two areas, which can avoid leakage of the medium. The peripheral wall of the piston member 122 is configured as an arc surface, which can reduce the contact surface between the piston member 122 and the cavity wall forming the active cavity 111, so that the piston member 122 can be more easily inserted into the active cavity 111. The piston member 122 and the cavity wall have a smaller contact surface, and the piston member 122 with an interference fit is more likely to deform, which will also reduce the elastic force of the piston member 122 and reduce the possibility of wear and friction. This helps to reduce the energy loss and wear of the piston member 122 during the movement process and extend the service life of the endoscope 1.

[0047] To achieve the above-mentioned purpose and other related purposes, the present application provides an insertion portion 200, see Figure 1 The insertion part 200 includes the front end assembly 100 as described above. In this way, the insertion part 200 has the beneficial effects of any of the above solutions, which will not be described in detail here.

[0048] To achieve the above-mentioned and other related purposes, the present application provides an endoscope 1, see Fig.10 , the endoscope 1 includes the aforementioned insertion portion 200. In this way, the endoscope 1 has the beneficial effects of any of the aforementioned solutions, which will not be repeated here. The endoscope 1 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 the endoscope 1.

[0049] The technical solution adopted by the present invention can achieve the following beneficial effects: the puncture mechanism 120 can be slidably arranged in the front end shell 110, and the elastic capsule 140 can inject the medium into the active cavity 111 of the front end shell 110. The medium can push the puncture mechanism 120 so that the puncture mechanism 120 can extend out of the opening 112 to achieve the puncture effect of the endoscope 1. In addition, in the elastic capsule 140, the pressure of the medium is controllable and stable. By changing the preset pressure value of the medium, the pushing effect of the medium on the front end shell 110 can be changed, so as to adapt to different human cavities, avoid the situation that the puncture mechanism 120 cannot be inserted into the inner wall of the cavity or punctured, and significantly improve the implementation effect and efficiency of the front end assembly 100. In addition, the distal end of the puncture mechanism 120 extends out of the opening 112, and the medium can continue to flow toward the through hole 1211, so that the medium can be automatically injected into the puncture mechanism 120, and the automatic injection operation is realized, which reduces the injection operation steps of the front end assembly 100 and further improves the working efficiency of the front end assembly 100.

[0050] 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.

[0051] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0052] 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. A front end assembly of an endoscope, characterized in that: include: A front end shell, wherein the front end shell has an active cavity, and an opening is formed at the distal end of the front end shell, and the opening is communicated with the active cavity; an acupuncture mechanism, the acupuncture mechanism being slidably disposed in the movable cavity, the acupuncture mechanism having through holes penetrating two opposite ends; An elastic sac body, wherein the elastic sac body has a storage cavity therein, and the storage cavity stores a medium; as well as A triggering member, the triggering member is located between the active cavity and the elastic capsule, and the triggering member is used to open or close the active cavity; When the trigger member opens the active cavity, the elastic sac injects a medium with a preset pressure value into the active cavity, and the medium pushes the puncture mechanism so that the distal end of the puncture mechanism extends out of the opening, and the medium can flow through the through hole to the distal end of the puncture mechanism.

2. The front end assembly according to claim 1, characterized in that: The front end assembly further includes an injection pipe, which is in communication with the storage cavity. The injection pipe is provided with an injection hole, and the injection hole is used to inject a medium into the storage cavity to adjust a storage pressure value in the storage cavity.

3. The front end assembly according to claim 2, characterized in that: The trigger member includes a sealing plug and a first driving rope, wherein the sealing plug seals the activity chamber, the first driving rope is connected to the sealing plug, and the first driving rope is used to drive the sealing plug to move in a direction away from the activity chamber to open the activity chamber; Alternatively, the triggering member is a membrane flap, which closes the active cavity, and when the storage pressure value is greater than or equal to the preset pressure value, the triggering member opens the active cavity to allow the medium to be injected into the active cavity.

4. The front end assembly according to claim 3, characterized in that: The injection pipe is integrated with the first driving rope; And / or, when the volume of the storage cavity is equal to the preset volume, the storage pressure value in the elastic bladder is equal to the preset pressure value.

5. The front end assembly according to claim 1, characterized in that: The acupuncture mechanism comprises an injection needle and a piston member, wherein the piston member is connected to the proximal end of the injection needle, the through hole runs through between the distal end of the injection needle and the proximal end of the piston member, and the piston member is slidably fitted in the active cavity.

6. The front end assembly according to claim 5, characterized in that The piston member has a limiting portion, the inner wall of the movable cavity is provided with a limiting groove, and the limiting portion is in limiting cooperation with the limiting groove; A limiting block is arranged in the limiting groove, and the limiting block is located in the movable path of the limiting portion, and the limiting block is used to adjust the maximum extension length of the injection needle relative to the opening.

7. The front end assembly according to claim 6, characterized in that: The front end shell further includes a second driving rope and an elastic driving member, one end of the limit block is connected to the second driving rope, and the other end is connected to the elastic driving member, one end of the elastic driving member away from the limit block is connected to the groove wall forming the limit groove, and the second driving rope is used to adjust the relative position of the limit block in the limit groove; And / or, opposite ends of the hole wall forming the opening are chamfered.

8. The front end assembly according to claim 5, characterized in that: The injection needle has a channel suitable for the flow of the medium, and the cross-sectional area ratio between the channel and the active cavity is 1:12-1:5; And / or, the peripheral wall of the piston member is configured as a curved surface.

9. An insertion portion, characterized in that: Comprising a front end assembly as described in any one of claims 1-8.

10. An endoscope, characterized in that: Comprising the insertion portion as claimed in claim 9.

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