An endoscope and its front-end component and insertion section

Abstract

The present invention discloses an endoscope, a front-end component thereof, and an insertion portion, relating to the field of medical devices. The front-end component includes a front-end housing, a needle puncture mechanism, an elastic bladder, and a trigger member. The front-end housing has an activity cavity, and an opening is provided at the distal end of the front-end housing, and the opening communicates with the activity cavity. The needle puncture mechanism is slidably disposed in the activity cavity, and the needle puncture mechanism has a through hole penetrating through opposite ends. The elastic bladder has a storage cavity for storing a medium. The trigger member is located between the activity cavity and the elastic bladder, and the trigger member is used to open or close the activity cavity. The elastic bladder can inject the medium into the activity cavity of the front-end housing. The medium can push the needle puncture mechanism so that the needle puncture mechanism can extend out of the opening, realizing the needle puncture function of the endoscope. In the elastic bladder, 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 housing is changed to adapt to different human body cavities, avoiding situations such as being unable to penetrate into the inner wall of the cavity or piercing through.

Description

Technical Field

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

[0002] An endoscope is a commonly used medical device, which is an inspection device that can directly enter the natural cavities of the human body and can provide sufficient diagnostic information for doctors to treat diseases. The endoscope acupuncture injection technology is an advanced medical technology that combines the direct visual observation of the endoscope with the precise operation of acupuncture injection, and is mainly used for injecting under the lesions in the internal cavities such as the digestive tract and the bladder.

[0003] The acupuncture effect of the existing acupuncture mechanism of the endoscope is not good. Because in different cavities, the resistance received by the acupuncture mechanism is different. For example, the bladder has the property of being expandable, etc., and the resistance received by the acupuncture mechanism in the bladder and the digestive tract is different. However, the acupuncture mechanism applies the same pressure, and there may be situations where it cannot penetrate into the inner wall of the cavity or pierce through, etc., which will seriously reduce the implementation effect and efficiency of the endoscope. Summary of the Invention

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

[0005] The present application provides a front-end assembly of an endoscope. The front-end assembly includes a front-end shell, an acupuncture mechanism, an elastic bladder, and a trigger member. The front-end shell has an activity cavity, and an opening is provided at the distal end of the front-end shell, and the opening is communicated with the activity cavity. The acupuncture mechanism is slidably disposed in the activity cavity. The acupuncture mechanism has a through hole penetrating through opposite ends. The elastic bladder has a storage cavity for storing a medium. The trigger member is located between the activity cavity and the elastic bladder, and the trigger member is used to open or close the activity cavity;

[0006] Wherein, when the trigger member opens the activity cavity, the elastic bladder injects a medium with a preset pressure value into the activity cavity, and the medium pushes the acupuncture mechanism so that the distal end of the acupuncture mechanism extends out of the opening, and the medium can flow to the distal end of the acupuncture mechanism through the through hole.

[0007] In an embodiment of the present application, the front-end assembly further includes an injection tube, the injection tube is communicated with the storage cavity, and the injection tube is provided with an injection hole for injecting a medium into the storage cavity to adjust the storage pressure value in the storage cavity.

[0008] In an embodiment of the present application, the trigger member includes a sealing plug and a first driving rope. The sealing plug closes the activity cavity. The first driving rope is connected to the sealing plug, and the first driving rope is used to drive the sealing plug to move away from the activity cavity to open the activity cavity;

[0009] Alternatively, the trigger is a membrane flap that closes the movable cavity. When the storage pressure value is greater than or equal to the preset pressure value, the trigger opens the movable cavity to allow the medium to be injected into the movable cavity.

[0010] In one embodiment of the present application, the injection tube and the first driving rope are integrally provided.

[0011] 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.

[0012] 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. A through hole runs through between the distal end of the injection needle and the proximal end of the piston member. The piston member is slidably fitted in the movable cavity.

[0013] In one embodiment of the present application, the piston member has a limiting portion, and a limiting groove is formed in the inner wall of the movable cavity. The limiting portion is in limiting cooperation with the limiting groove;

[0014] A limiting block is provided in the limiting groove, and the limiting block is located in the movement path of the limiting portion. The limiting block is used to adjust the maximum extension length of the injection needle relative to the opening.

[0015] In one embodiment of the present application, the front end housing further includes a second driving rope and an elastic driving member. One end of the limiting 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 limiting block is connected to the groove wall forming the limiting groove. The second driving rope is used to adjust the relative position of the limiting block in the limiting groove.

[0016] In one embodiment of the present application, the opposite ends of the hole wall forming the opening are chamfered.

[0017] In one embodiment of the present application, the injection needle has a channel suitable for flowing medium, and the cross-sectional area ratio between the channel and the movable cavity is 1:12 - 1:5.

[0018] In one embodiment of the present application, the peripheral wall of the piston member is configured as an arc surface.

[0019] To achieve the above object and other related objects, the present application provides an insertion portion, which is characterized in that it includes the front end assembly as described above.

[0020] To achieve the above object and other related objects, the present application provides an endoscope, which is characterized in that it includes the insertion portion as described above.

[0021] The technical solution adopted by the present invention can achieve the following beneficial effects: The acupuncture mechanism is slidably disposed in the front end housing, and the elastic bladder can inject a medium into the movable cavity of the front end housing. The medium can push the acupuncture mechanism so that the acupuncture mechanism can extend out of the opening, realizing the acupuncture function of the endoscope. Moreover, in the elastic bladder, 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 housing can be changed, so as to adapt to different human body cavities, avoiding situations such as being unable to penetrate into the inner wall of the cavity or piercing through, and significantly improving the implementation effect and efficiency of the front end assembly. In addition, the distal end of the acupuncture mechanism extends out of the opening, and the medium can continue to flow into the through hole, so that the medium can be automatically injected into the acupuncture mechanism, realizing an automatic injection operation, reducing the injection operation steps of the front end assembly, and further improving the working efficiency of the front end assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram of an insertion portion of an endoscope shown in an exemplary embodiment of the present application;

[0024] Figure 2 is a schematic structural diagram of a front end assembly shown in an exemplary embodiment of the present application;

[0025] Figure 3 is a schematic structural diagram of another front end assembly shown in an exemplary embodiment of the present application;

[0026] Figure 4 is a schematic structural diagram of another insertion portion shown in an exemplary embodiment of the present application;

[0027] Figure 5 is a schematic structural diagram of yet another front end assembly shown in an exemplary embodiment of the present application;

[0028] Figure 6 is a schematic structural diagram of a front end assembly and an injection tube shown in an exemplary embodiment of the present application;

[0029] Figure 7 is a schematic structural diagram of yet another front end assembly shown in an exemplary embodiment of the present application;

[0030] Figure 8 is a schematic structural diagram of an acupuncture mechanism and a front end housing shown in an exemplary embodiment of the present application;

[0031] Figure 9 is Figure 8 an enlarged view of part a in

[0032] Figure 10 a schematic structural view of an endoscope shown in an exemplary embodiment of the present application.

[0033] In the figure: 1, endoscope; 100, front-end assembly; 110, front-end housing; 111, movable cavity; 112, opening; 113, limiting groove; 114, second driving rope; 115, elastic driving member; 116, limiting block; 117, connecting channel; 120, acupuncture mechanism; 121, injection needle; 1211, through hole; 122, piston member; 1221, limiting portion; 130, trigger member; 131, sealing plug; 132, first driving rope; 140, elastic capsule; 141, storage cavity; 150, injection tube; 151, injection hole; 160, camera module; 200, insertion portion; 210, active bending section. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present invention.

[0035] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order different from those illustrated or described herein, and the objects distinguished by "first", "second", etc. generally belong to the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0036] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative distances of each component from the user in the usage environment. Among them, 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".

[0037] The present application provides a front-end assembly 100 of an endoscope 1. Please refer to 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.

[0038] 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 .

[0039] 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.).

[0040] 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.

[0041] Please continue reading Figure 2, there is a storage cavity 141 inside the elastic bladder 140. The storage cavity 141 stores the medium. The storage cavity 141 of the elastic bladder 140 can accommodate and store a preset volume of the medium. Since the elastic bladder 140 itself has a certain elasticity. When the medium is injected, it will deform, and this deformation causes the medium to be compressed inside the bladder, 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 enables the pressure of the medium inside the elastic bladder 140 to be equal to the preset pressure value. The trigger 130 is located between the active cavity 111 and the elastic bladder 140, and the trigger 130 is used to open or close the active cavity 111. As Figure 2 shown, when the trigger 130 closes the active cavity 111, the connection channel 117 between the active cavity 111 and the elastic bladder 140 is closed, and the medium cannot flow out to the active cavity 111 and push the needle puncture mechanism 120. As Figure 3 shown, when the trigger 130 opens the active cavity 111, the elastic bladder 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 needle puncture mechanism 120, ensuring that the needle puncture mechanism 120 can move to the designated position, as Figure 4 shown, that is, the needle puncture mechanism 120 can pierce the target tissue b (i.e., the diseased area or its adjacent position, etc.), avoiding situations such as over-piercing or non-piercing, and optimizing the piercing effect of the needle puncture mechanism 120.

[0042] Please refer to Figure 5 , the medium pushes the needle puncture mechanism 120, so that the distal end of the needle puncture mechanism 120 extends out of the opening 112, and the medium can flow to the distal end of the needle puncture mechanism 120 through the through hole 1211. And when the needle puncture mechanism 120 moves to the designated position, the medium flows out through the through hole 1211 on the needle puncture mechanism 120, ensuring that the medium can be directly injected into the target tissue, thereby achieving effective injection. This setting can enable the medium to continue to flow into the through hole 1211 after the distal end of the needle puncture mechanism 120 extends out of the opening 112, so that the medium can be automatically injected into the needle puncture mechanism 120, realizing an automatic injection operation, reducing the injection operation steps of the front-end component 100, and further improving the working efficiency of the front-end component 100.

[0043] In one embodiment, please refer to Figure 6 and Figure 7 , the front-end component 100 may further include an injection tube 150. The injection tube 150 is communicated with the storage cavity 141. The injection tube 150 is provided with an injection hole 151, and the injection hole 151 penetrates the tube wall of the injection tube 150. The injection tube 150 can inject the medium from the proximal end of the endoscope 1 into the storage cavity 141. Figure 6 shows a schematic structural diagram of the front-end component 100 before injecting the medium into the storage cavity 141 through the injection tube 150, Figure 7The structural schematic diagram of the front-end component 100 after injecting the medium into the storage cavity 141 through the injection tube 150 is shown. The injection hole 151 is used to inject the medium into the storage cavity 141 to adjust the storage pressure value in the storage cavity 141. Medical staff can adjust the pressure value in the storage cavity 141 by controlling the amount of the injected medium. The change in the pressure value in the storage cavity 141 directly affects the thrust of the medium on the needle puncture mechanism 120. Medical staff can change the magnitude of the thrust by adjusting the pressure value in the storage cavity 141, so as to control the extending speed and distance of the needle puncture mechanism 120.

[0044] Exemplarily, in the case where the needle puncture mechanism 120 requires a larger thrust to penetrate thicker tissues, medical staff can increase the pressure value in the storage cavity 141 by increasing the amount of the injected medium, so as to increase the thrust of the medium on the needle puncture mechanism 120. On the contrary, when the needle puncture mechanism 120 requires a smaller thrust or more delicate operation, medical staff can reduce the pressure value in the storage cavity 141 by reducing the amount of the injected medium, so as to reduce the thrust. The injection tube 150 can bring more flexible and adaptable operating characteristics to the front-end component 100.

[0045] It can be understood that the deformation amount of the elastic bladder 140 is affected by the internal medium volume or material. In the elastic bladder 140 of the same material, the larger the volume of the medium, the larger the deformation amount of the elastic bladder 140, and the larger the internal storage pressure value. Wherein, the storage pressure value in the elastic bladder 140 can be the pressure value of the medium in the elastic bladder 140. When the volume of the storage cavity 141 is equal to the preset volume, the storage pressure value in the elastic bladder 140 is equal to the preset pressure value. This setting can prompt the volume of the storage cavity 141 to directly affect the pressure of the elastic bladder 140. By adjusting the volume of the medium in the storage cavity 141, the storage pressure value is adjusted. This setting can ensure the controllability of the pressure value, ensure that the medium can provide a constant and controllable thrust when pushing the needle puncture mechanism 120, and ensure that the needle puncture mechanism 120 can move to the designated position.

[0046] In one embodiment, the trigger member 130 may include a sealing plug 131 and a first driving rope 132, and the sealing plug 131 closes the movable cavity 111. Exemplarily, please refer back to Figure 2 and Figure 3 , Figure 2 which shows the structural schematic diagram of the sealing plug 131 closing the connecting channel 117, Figure 3 and which shows the structural schematic diagram of the sealing plug 131 opening the connecting channel 117. There is a connecting channel 117 between the movable cavity 111 and the elastic bladder 140. The sealing plug 131 can be inserted into the connecting channel 117 along the proximal to distal direction of the endoscope 1 to close the movable cavity 111.

[0047] Please continue to refer toFigure 2 and Figure 3 , the first driving rope 132 is connected to the sealing plug 131. The first driving rope 132 is used to drive the sealing plug 131 to move away from the movable cavity 111, so as to open the movable cavity 111. Exemplarily, the proximal end of the first driving rope 132 can extend to the proximal end of the endoscope 1. Medical staff can pull the first driving rope 132, and the first driving rope 132 drives the sealing plug 131 to move in the direction from the distal end to the proximal end of the endoscope 1, so as to open the movable cavity 111. The medium can enter the movable cavity 111. The first driving rope 132 can enable the piercing operation of the piercing mechanism 120 and the controllable operation of the medium.

[0048] Preferably, the injection tube 150 is integrally provided with the first driving rope 132. In other words, the injection tube 150 can take into account the pulling effect of the first driving rope 132 on the sealing plug 131. Exemplarily, the distal end of the injection tube 150 is connected to the sealing plug 131, and a part of the injection tube 150 is located in the storage cavity 141, and an injection hole 151 is opened in this part. The injection hole 151 communicates with the storage cavity 141, and the medium can be injected into the storage cavity 141 through the injection hole 151. Moreover, 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.

[0049] In another embodiment, the trigger 130 can be a membrane flap, and the membrane flap closes the movable 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 make it open. The trigger 130 opens the movable cavity 111 so that the medium is injected into the movable cavity 111. The membrane flap can accurately control the size of the opening pressure. The elastic bladder 140 injects the medium with a preset pressure value into the movable cavity 111, and the constant pressure ensures that the medium can provide a constant and controllable thrust when pushing the piercing 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 one-way conduction, and this setting can promote the one-way flow of the medium, that is, the medium flows from the elastic bladder 140 to the movable cavity 111, avoiding the reverse flow of the medium and affecting the pushing effect of the medium on the piercing mechanism 120.

[0050] In this embodiment, please continue to refer to Figure 5, the needle insertion mechanism 120 may include an injection needle 121 and a piston member 122. The injection needle 121 may be an elongated tubular structure. The material of the piston member 122 may be rubber or thermoplastic elastomer (TPE), etc., and this embodiment does not limit it. The piston member 122 is connected to the proximal end of the injection needle 121 to ensure the synchronism of the piston member 122 and the injection needle 121 during the movement in the movable cavity 111. A through hole 1211 runs through between the distal end of the injection needle 121 and the proximal end of the piston member 122. The through hole 1211 may be a path for a medium (such as normal saline, distilled water or other drugs, etc.) to be transferred from the piston member 122 to the distal end of the injection needle 121. The piston member 122 is slidably fitted in the movable cavity 111. When the piston member 122 is pushed by the medium, the piston member 122 slides smoothly along the inner wall of the movable cavity 111. The sliding process of the piston member 122 in the movable cavity 111 is not only stable but also controllable, so that the movement path of the injection needle 121 in the movable cavity 111 is controllable, prompting the injection needle 121 to accurately slide out of the opening 112. In addition, the fit between the piston member 122 and the movable cavity 111 ensures the minimum friction and the maximum tightness.

[0051] Moreover, when the piston member 122 is pushed by the medium to a preset position, 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 forming the movable cavity 111 abuts against the piston member 122 at the preset position, and the cavity wall can prevent the piston member 122 from moving, so as to hinder the movement of the injection needle 121 and the piston member 122. The medium continues to be injected into the movable cavity 111, and then flows into the through hole 1211 until the distal end of the injection needle 121. At this time, the medium jets out 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, improves the work efficiency, but also reduces the pain and discomfort of the patient, because the insertion and injection occur almost simultaneously, reducing the residence time of the needle tip in the human tissue.

[0052] Please refer to Figure 8 and Figure 9, the piston member 122 has a limiting portion 1221, a limiting groove 113 is formed on the inner wall of the movable cavity 111, and the limiting portion 1221 is in limiting cooperation with the limiting groove 113. The limiting cooperation between the limiting portion 1221 and the limiting groove 113 ensures the stable movement of the piston member 122 in the movable cavity 111, prevents the piston member 122 from shifting or getting 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. And the limiting block 116 is located in the moving path of the limiting portion 1221, playing a key regulating role. The limiting block 116 is used to adjust the maximum extending length of the injection needle 121 relative to the opening 112. When the piston member 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 limiting block 116 restricts the further extension of the injection needle 121 relative to the opening 112. The presence of the limiting block 116 effectively prevents the extending length of the injection needle 121 from exceeding the target range. If the injection needle 121 extends too long, it may cause excessive piercing, increasing the pain and injury risk of the patient; while 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 assembly 100 and the target position through the camera module 160 of the front-end assembly 100, and adjust the relative position of the limiting block 116 to adjust the maximum extending length of the injection needle 121 relative to the opening 112, ensuring that the injection needle 121 extends an appropriate length, avoiding the situation that the injection needle 121 extends too long or too short, and improving the injection effect of the injection needle 121.

[0053] In other words, the amount of the medium is used to increase the pressure value in the storage cavity 141, thereby increasing the thrust of the medium on the needle-puncturing mechanism 120, and the limiting block 116 can limit the extending length of the needle-puncturing mechanism 120. This setting can enable the needle-puncturing mechanism 120 to have sufficient speed and force to move to the designated position, improving the controllability of the needle-puncturing mechanism 120.

[0054] In one embodiment, please continue to refer to Figure 9, the front end housing 110 may further include a second drive rope 114 and an elastic drive member 115. One end of the limit block 116 is connected to the second drive rope 114, and the other end is connected to the elastic drive member 115. The elastic drive member 115 may be a spring or a spring piece, etc., which is not limited in this embodiment. The elastic drive member 115 uses its own elastic potential energy to urge the limit block 116 to move toward the side close to the opening 112. By pulling the second drive 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 protrusion length of the injection needle 121 relative to the opening 112. Therefore, the second drive rope 114, the elastic drive member 115, and the limit block 116 together constitute a flexible and reliable injection needle 121 protrusion length adjustment system. This system not only ensures the accuracy and safety of the injection operation, but also effectively avoids the problems of over-piercing or non-piercing of the injection needle 121 by dynamically adjusting the position of the limit block 116.

[0055] Moreover, the proximal end of the second drive rope 114 may be configured with identification lines, such as the length value of the second drive rope 114, etc., which can represent the telescopic length of the second drive rope 114 relative to the endoscope 1 and also represent the position of the limit block 116. This setting facilitates the adjustment of the maximum protrusion length of the injection needle 121 relative to the opening 112 and improves the flexibility of use.

[0056] Preferably, please continue to refer to Figure 9 , the opposite ends of the hole wall forming the opening 112 are chamfered. The chamfer may be a rounded chamfer or an inclined chamfer, etc., which is not limited in this embodiment. The edge of the opening 112 may form a smooth arc surface or an inclined surface. When the injection needle 121 contacts the hole wall, it will not be subjected to sudden resistance or deflection, 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 improves the accuracy and efficiency of the operation.

[0057] In this embodiment, please refer to Figure 5, the injection needle 121 has a channel adapted for a flowing medium. Among them, the channel can be formed by a through hole 1211 passing through the injection needle 121. The cross-sectional area ratio between the channel and the movable cavity 111 is 1:12 - 1:5, such as 1:12, 1:10, or 1:5, etc., and this embodiment does not limit it. 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 continuously act on the piston member 122, forcing the piston member 122 to squeeze the cavity wall forming the movable cavity 111 and the hole wall forming the opening 112, resulting in damage to the needle puncture mechanism 120. When the cross-sectional area is set too large, the channel of the injection needle 121 is large, and the medium will flow out quickly from the channel of the injection needle 121, resulting in the medium not pushing the piston member 122 to the designated position. An appropriate cross-sectional area ratio can balance the driving effect of the medium on the piston member 122, the injection effect of the injection needle 121, etc., so as to enable the medium to push the piston member 122 to move to the designated position, and the medium can be quickly injected from the injection needle 121, improving the use efficiency and use effect of the front-end assembly 100.

[0058] Preferably, the piston member 122 can be in interference fit with the cavity wall forming the movable cavity 111. Furthermore, the piston member 122 can divide the movable cavity 111 into two regions, which can prevent medium leakage. The peripheral wall of the piston member 122 is configured as an arc surface. This setting can reduce the contact surface between the piston member 122 and the cavity wall forming the movable cavity 111, so that the piston member 122 can be more easily inserted into the movable cavity 111. The piston member 122 and the cavity wall have a smaller contact surface, and the piston member 122 in interference fit is more likely to deform, which also reduces the elastic force of the piston member 122 and reduces the possibility of wear and friction. This helps to reduce the energy loss and wear of the piston member 122 during movement and extends the service life of the endoscope 1.

[0059] To achieve the above and other related purposes, the present application provides an insertion portion 200. Please refer to Figure 1 , the insertion portion 200 includes the front-end assembly 100 as described above. In this way, the insertion portion 200 has the beneficial effects of any of the foregoing solutions, which will not be elaborated here.

[0060] To achieve the above and other related purposes, the present application provides an endoscope 1. Please refer to Figure 10 , the endoscope 1 includes the insertion portion 200 as described above. In this way, the endoscope 1 has the beneficial effects of any of the foregoing solutions, which will not be elaborated here. The endoscope 1 can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, an oral endoscope, a laryngoscope, a vaginoscope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not specifically limit the type of the endoscope 1.

[0061] The technical solution adopted by the present invention can achieve the following beneficial effects: The acupuncture mechanism 120 is slidably disposed in the front-end housing 110, and the elastic bladder 140 can inject a medium into the movable cavity 111 of the front-end housing 110. The medium can push the acupuncture mechanism 120 so that the acupuncture mechanism 120 can extend out of the opening 112, realizing the acupuncture function of the endoscope 1. Moreover, in the elastic bladder 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 housing 110 can be changed, so as to adapt to different human body cavities, avoiding situations such as being unable to penetrate into the inner wall of the cavity or piercing through, significantly improving the implementation effect and efficiency of the front-end assembly 100. In addition, the distal end of the acupuncture mechanism 120 extends out of the opening 112, and the medium can continue to flow into the through hole 1211, so that the medium can be automatically injected into the acupuncture mechanism 120, realizing the 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.

[0062] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the presence of additional identical elements in the process, method, article or device including that element.

[0063] In addition, it should be pointed out 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. It 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, the features described with reference to certain examples may be combined in other examples.

[0064] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A front-end component of an endoscope, characterized in that, Comprising: A front shell having an active cavity, with an opening provided at the distal end of the front shell, and the opening communicating with the active cavity; A needle-puncturing mechanism slidably disposed within the active cavity, and the needle-puncturing mechanism having a through-hole penetrating opposite ends; An elastic bladder having a storage cavity therein for storing a medium; And A trigger member located between the active cavity and the elastic bladder, and the trigger member being used to open or close the active cavity; Wherein, when the trigger member opens the active cavity, the elastic bladder injects a medium with a preset pressure value into the active cavity, and the medium pushes the needle-puncturing mechanism so that the distal end of the needle-puncturing mechanism extends out of the opening, and when the needle-puncturing mechanism moves to a specified position, the medium can flow through the through-hole to the distal end of the needle-puncturing mechanism.

2. The front-end component according to claim 1, characterized in that, The front-end assembly further includes an injection tube communicating with the storage cavity, and the injection tube is provided with an injection hole for injecting a medium into the storage cavity to adjust the storage pressure value in the storage cavity.

3. The front-end component according to claim 2, characterized in that, The trigger member includes a sealing plug and a first driving rope, the sealing plug closing the active cavity, the first driving rope being connected to the sealing plug, and the first driving rope being used to drive the sealing plug to move away from the active cavity to open the active cavity; Alternatively, the trigger member is a diaphragm closing the active cavity, and when the storage pressure value is greater than or equal to the preset pressure value, the trigger member opens the active cavity so that the medium is injected into the active cavity.

4. The front-end component according to claim 3, characterized in that The injection tube is integrally provided with the first driving rope; And / or, when the volume of the storage cavity is equal to a preset volume, the storage pressure value within the elastic bladder is equal to the preset pressure value.

5. The front-end component according to claim 1, characterized in that, The needle-puncturing mechanism includes an injection needle and a piston member, the piston member connecting to the proximal end of the injection needle, the through-hole penetrating between the distal end of the injection needle and the proximal end of the piston member, and the piston member being slidably fitted within the active cavity.

6. The front-end component according to claim 5, characterized in that, The piston member has a limiting portion, and a limiting groove is provided on the inner wall of the active cavity, and the limiting portion is in limiting cooperation with the limiting groove; A limiting block is provided within the limiting groove, and the limiting block is located in the movement path of the limiting portion, and the limiting block is used to adjust the maximum extending length of the injection needle relative to the opening.

7. The front-end component according to claim 6, wherein The front shell further includes a second driving rope and an elastic driving member, one end of the limiting block connecting to the second driving rope, the other end connecting to the elastic driving member, and the end of the elastic driving member away from the limiting block connecting to form the wall of the limiting groove, and the second driving rope being used to adjust the relative position of the limiting block within the limiting groove; And / or, the opposite ends of the hole wall forming the opening are chamfered.

8. The front-end component according to claim 5, characterized in that The injection needle has a channel adapted for the medium to flow through, 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 an arc surface.

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

10. An endoscope, characterized in that, Comprising the insertion portion according to claim 9.

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