An endoscope and its front-end component and insertion section

Abstract

The present invention discloses an endoscope, a front-end assembly thereof, and an insertion portion, relating to the field of medical devices. The front-end assembly includes a front-end housing, a camera module, a needle puncturing mechanism, and a driving mechanism. The front-end housing has an activity cavity. The camera module is disposed inside the front-end housing. The needle puncturing mechanism includes a syringe barrel and an injection needle. The syringe barrel can slide into or out of the activity cavity. The syringe barrel has an injection cavity. The injection needle is slidably fitted in the injection cavity. The driving mechanism is in transmission connection with the syringe barrel. When the syringe barrel slides out of the activity cavity, the distal end of the syringe barrel can be within the field of view of the camera module. Medical staff can simultaneously observe the position information of the syringe barrel and the affected part, etc., and adjust the endoscope based on this information to guide the adjustment of the insertion direction and insertion position of the injection needle, so as to ensure that the injection needle can accurately penetrate the affected part. This setting can improve the treatment effect, reduce the damage to other tissues, and avoid the influence of the bending and twisting of the endoscope in the human body cavity on the puncturing effect of the needle puncturing mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an endoscope, a front-end assembly thereof, and an 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 technique is an advanced medical technique that combines the observation of the endoscope and the operation of acupuncture injection, and is mainly used for injecting drugs under the lesions in the internal cavities such as the digestive tract and the bladder.

[0003] The acupuncture effect of the existing acupuncture structure of the endoscope is not good. It is difficult for the acupuncture structure of the endoscope to accurately penetrate into the affected part, which may lead to poor treatment effects. Even accidental puncture of other tissues around the affected part may occur, resulting in bleeding, pain or more serious tissue damage. Summary of the Invention

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

[0005] The present application provides a front-end assembly of an endoscope, including a front-end housing, a camera module, an acupuncture mechanism, and a driving mechanism. The front-end housing has an activity cavity. The camera module is arranged inside the front-end housing. The acupuncture mechanism includes an injection cylinder and an injection needle. The injection cylinder can slide into or out of the activity cavity. The injection cylinder has an injection cavity. The injection needle is slidably fitted in the injection cavity. The driving mechanism is in transmission connection with the injection cylinder. Wherein, when the injection cylinder slides out of the activity cavity and moves to a first preset position, the distal end of the injection cylinder is within the visual field range of the camera module, and the driving mechanism can inject a medium with a preset pressure value into the injection cylinder, and the medium pushes the injection needle so that the injection needle extends out of the distal end of the injection cylinder.

[0006] In an embodiment of the present application, a piston member is arranged at the proximal end of the injection needle. The piston member is provided with a first channel which communicates with the injection needle. The piston member is slidably fitted in the injection cavity. The driving mechanism communicates with the injection cavity. The medium can enter the injection cavity and push the piston member. When the piston member slides to a second preset position, the medium can pass through the first channel and flow to the distal end of the injection needle.

[0007] In an embodiment of the present application, the driving mechanism includes a first tube body and a first elastic member. One end of the first elastic member is connected to the cavity wall forming the activity cavity, and the other end is connected to the proximal end of the injection cylinder. The first tube body is connected to the proximal end of the injection cylinder. The first tube body is used to drive the injection cylinder to move towards the proximal end of the injection cylinder. The first tube body can inject a medium into the injection cylinder, and the medium pushes the injection needle to extend out of the injection cylinder.

[0008] In an embodiment of the present application, the front-end component further includes a second tube body redundantly arranged within the syringe barrel. The distal end of the second tube body communicates with the first channel, and the second tube body is capable of injecting a medium towards the distal end of the injection needle.

[0009] In an embodiment of the present application, the second tube body is disposed through the first tube body.

[0010] In an embodiment of the present application, the peripheral wall of the piston member is configured as an arc surface.

[0011] In an embodiment of the present application, the tube wall of the syringe barrel is provided with a second channel extending along the axis of the syringe barrel, and opposite ends of the second channel penetrate the inner wall of the syringe barrel;

[0012] When the piston member slides to the second preset position, the distal end of the injection needle extends out of the syringe barrel, the first channel communicates with the second channel, and the medium can pass through the second channel and flow into the first channel.

[0013] In an embodiment of the present application, the needle puncturing mechanism further includes a second elastic member located within the injection cavity. One end of the second elastic member is connected to the inner wall of the syringe barrel, and the other end is connected to the end of the piston member away from the injection needle. The second elastic member is used to drive the piston member to move towards the proximal side close to the syringe barrel.

[0014] In an embodiment of the present application, a guiding groove is formed on the inner wall of the syringe barrel, the guiding groove extends along the axis of the syringe barrel, and a convex block is provided on the peripheral side of the piston member, and the convex block is embedded in the guiding groove.

[0015] In an embodiment of the present application, the injection needle has an injection channel adapted to flow the medium, and the cross-sectional area ratio between the injection channel and the injection cavity is 1:12 - 1:5.

[0016] In an embodiment of the present application, an opening is formed at the distal end of the syringe barrel, the injection needle is slidably fitted in the opening, and chamfers are provided at opposite ends of the hole wall forming the opening.

[0017] To achieve the above object and other related objects, the present application provides an insertion portion, and the insertion portion includes the aforementioned front-end component.

[0018] To achieve the above object and other related objects, the present application provides an endoscope, and the endoscope includes the aforementioned insertion portion.

[0019] The technical solution adopted by the present invention can achieve the following beneficial effects: The syringe can slide into or out of the movable cavity. When the syringe slides out of the movable cavity, the distal end of the syringe can be within the field of view of the imaging module. Medical staff can simultaneously observe the position information of the syringe and the affected part, etc., and adjust the endoscope based on this information to guide the adjustment of the insertion direction and position of the injection needle to ensure that the injection needle can accurately penetrate the affected part. This setting can improve the treatment effect, reduce the damage to other tissues, avoid the influence of the bending and torsion of the endoscope in the human body cavity on the puncture effect of the puncture mechanism, reduce the probability of misinsertion, and reduce the surgical risk.

[0020] In addition, the driving mechanism can inject a medium towards the syringe to push the injection needle. 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 injection needle can be changed, so as to adapt to different affected parts, avoiding situations such as being unable to penetrate the affected part or puncturing the cavity, and significantly improving the implementation effect and efficiency of the front-end component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 is a schematic structural diagram of the insertion part shown in an exemplary embodiment of the present application;

[0023] Figure 2 is a schematic structural diagram of another insertion part shown in an exemplary embodiment of the present application;

[0024] Figure 3 is a schematic structural diagram of the front-end component and the active bending section shown in an exemplary embodiment of the present application;

[0025] Figure 4 is a schematic structural diagram of the front-end component from another perspective shown in an exemplary embodiment of the present application;

[0026] Figure 5 is a schematic structural diagram of the insertion part in a human organ shown in an exemplary embodiment of the present application;

[0027] Figure 6 is a schematic structural diagram of another front-end component and the active bending section shown in an exemplary embodiment of the present application;

[0028] Figure 7It is a schematic structural diagram of another front-end component and an active bending section shown in an exemplary embodiment of the present application;

[0029] Figure 8 is Figure 7 the enlarged view at position a in;

[0030] Figure 9 It is a schematic structural diagram of an endoscope shown in an exemplary embodiment of the present application.

[0031] In the figure: 1, endoscope; 100, front-end component; 110, front-end shell; 111, movable cavity; 120, acupuncture mechanism; 121, syringe; 1211, second channel; 1212, opening; 122, injection needle; 1221, injection channel; 123, injection cavity; 124, piston member; 1241, first channel; 125, second elastic member; 130, camera module; 140, driving mechanism; 141, first tube body; 142, first elastic member; 143, second tube body; 200, insertion part; 210, active bending section. Detailed implementation manners

[0032] 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0033] The terms "first", "second", etc. in the specification 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 other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0034] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative positions of each component to 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".

[0035] The acupuncture effect of the existing acupuncture structure of the endoscope is not good. Because the body cavity is curved, the insertion part may twist, bend or undergo minute deformation in the cavity, and the relative position between the acupuncture mechanism and the camera module 130 may change. In addition, during the insertion of the insertion part, to prevent the acupuncture mechanism from scratching the inner wall of the cavity, the acupuncture mechanism is arranged inside the insertion part. Before the acupuncture mechanism punctures, medical staff cannot observe the specific position of the acupuncture mechanism in the display screen of the endoscope. Medical staff can only judge the approximate position of the acupuncture mechanism through experience. This makes it difficult for the acupuncture structure of the endoscope to accurately puncture the affected part, which may lead to poor treatment effects. Even accidentally stab other tissues around the affected part, resulting in bleeding, pain or more serious tissue damage.

[0036] The present application provides a front-end assembly 100 of an endoscope 1. Please refer to Figure 1 , and the following content is referred to as the front-end assembly 100. The front-end assembly 100 can be inserted into the human body cavity, and under the operation of medical staff, the front-end assembly 100 can perform different operations.

[0037] Exemplarily, please continue to refer to Figure 1 , the endoscope 1 may include an insertion part 200, and the insertion part 200 may include a front-end assembly 100 and an active bending section 210. Under the operation of medical staff, the active bending section 210 can be bent, and the front-end assembly 100 is connected to the distal end of the active bending section 210. During the bending of the active bending section 210, the front-end assembly 100 can be arranged in multiple different directions to adjust the position and orientation of the front-end assembly 100 so that the front-end assembly 100 can observe or treat the affected part.

[0038] In addition, it can be understood that in addition to the active bending section 210, medical staff can also change the relative position and orientation of the front-end assembly 100 by operating such as pulling out, continuing to insert or rotating the endoscope 1, so that the front-end assembly 100 can complete complex tasks, which will not be elaborated here.

[0039] In this embodiment, please refer to Figure 2 , the front-end assembly 100 may include a front-end housing 110, an acupuncture mechanism 120, a camera module 130 and a driving mechanism 140. The camera module 130 and the acupuncture mechanism 120 are arranged inside the front-end housing 110, and the driving mechanism 140 is connected to the acupuncture mechanism 120.

[0040] The front-end housing 110 has an activity cavity 111, and the injection cavity 123 can extend along the proximal to distal direction of the front-end assembly 100. Among them, the shape of the activity cavity 111 can be cylindrical, cubic, etc. Further, an opening 1212 is provided at the distal end of the front-end housing 110, and the opening 1212 is communicated with the injection cavity 123.

[0041] The camera module 130 is disposed within the front housing 110. The camera module 130 can observe the front image of the protruding front component 100, etc., avoid other substances from obstructing the movement of the front component 100, and collect the image information of the affected part, such as the relative position between the affected part and the front component 100, etc.

[0042] The needle puncturing mechanism 120 can be slidably fitted in the moving cavity 111. Exemplarily, the opening 1212 communicating with the moving cavity 111 can pass through at least a part of the needle puncturing mechanism 120, and the needle puncturing mechanism 120 is slidably disposed within the injection cavity 123.

[0043] More specifically, please refer to Figure 2 and Figure 3 , the needle puncturing mechanism 120 may include a syringe barrel 121 and a hypodermic needle 122. The syringe barrel 121 may be an elongated tubular structure. The syringe barrel 121 is slidably fitted in the moving cavity 111, and the syringe barrel 121 can slide into or out of the moving cavity 111. As Figure 4 shown, when the syringe barrel 121 slides out of the moving cavity 111 and the syringe barrel 121 moves to the first preset position, the distal end of the syringe barrel 121 is within the field of view b of the camera module 130. Further, as Figure 5 shown, Figure 5 the insertion portion 200 in

[0044] is inserted into the human organ (bladder). The camera module 130 can simultaneously collect the image information of the syringe barrel 121 and the affected part c, and transmit the image back to the display device for medical staff to observe and use. This setting enables medical staff to simultaneously observe the relative position information of the syringe barrel 121 and the affected part c, etc., and adjust the endoscope 1 based on this information to guide and adjust the puncturing direction and position of the hypodermic needle 122 to ensure that the hypodermic needle 122 can accurately penetrate the affected part c. This setting can improve the treatment effect, reduce the damage to other tissues, avoid affecting the puncturing effect of the needle puncturing mechanism 120 due to the bending, twisting, etc. of the endoscope 1 in the human body cavity, reduce the probability of mis-puncturing, and reduce the surgical risk.

[0045] Please refer to Figure 3 and Figure 6 , Figure 3 shows a schematic structural view of the hypodermic needle 122 located within the injection cavity 123. Figure 6The schematic diagram of the structure in which the injection needle 122 extends out of the injection cavity 123 is shown. The syringe 121 has an injection cavity 123, and the injection needle 122 is slidably matched in the injection cavity 123. The driving mechanism 140 is connected to the syringe 121 in a transmission manner. When the syringe 121 slides to the first preset position, the driving mechanism 140 can inject a medium with a preset pressure value into the syringe 121, and the medium pushes the injection needle 122 so that the injection needle 122 extends out of the distal end of the syringe 121. During this period, the pressure of the medium is controllable and stable. Medical staff can change the pushing effect of the medium on the injection needle 122 by changing the preset pressure value of the medium, such as different insertion speeds or different depths of insertion ranges, so as to adapt to different affected parts, avoid the situation where the affected part cannot be pierced or the cavity is pierced, and significantly improve the implementation effect and efficiency of the front-end component 100.

[0046] In this example, please continue to refer to Figure 3 , a piston 124 is disposed at the proximal end of the injection needle 122 to ensure synchronization of the piston 124 and the injection needle 122 during movement in the injection cavity 123. The piston 124 may be made of rubber or thermoplastic elastomer (TPE), etc., which is not limited in this embodiment. The piston 124 is slidably fitted in the injection cavity 123, and the driving mechanism 140 is connected to the injection cavity 123. Under the action of the driving mechanism 140, the medium can enter the injection cavity 123 and push the piston 124. When the piston 124 is pushed by the medium, it slides along the inner wall of the injection cavity 123. The sliding process of the piston 124 in the injection cavity 123 is stable, so that the moving path of the injection needle 122 in the injection cavity 123 is controllable, so that the injection needle 122 can accurately slide out of the injection cavity 123. In addition, the matching relationship between the piston 124 and the injection cavity 123 ensures minimum friction and maximum sealing.

[0047] Please continue reading Figure 3 The piston 124 is provided with a first channel 1241, and the first channel 1241 is connected to the injection needle 122. When the piston 124 slides to the second preset position, the medium can pass through the first channel 1241 and flow to the distal end of the injection needle 122. The first channel 1241 can provide a path for the medium (such as saline, distilled water or other drugs, etc.) to be transferred from the piston 124 to the distal end of the injection needle 122, ensuring that the medium can be injected into the affected part.

[0048] The second preset position may refer to the position of the injection needle 122 when it is extended to a preset length, or the relative position between the injection needle 122 and the syringe 121 when the distal end of the injection needle 122 pierces the affected part.

[0049] In this example, please continue to refer to Figure 3, the driving mechanism 140 may include a first tube body 141 and a first elastic member 142. Among them, the first elastic member 142 may be a spring, a shrapnel, etc., and this embodiment does not limit it. One end of the first elastic member 142 is connected to the cavity wall forming the movable cavity 111, and the other end is connected to the proximal end of the syringe barrel 121. The first elastic member 142 can continuously act between the cavity wall forming the movable cavity 111 and the syringe barrel 121. The first elastic member 142 is used to drive the syringe barrel 121 so that the syringe barrel 121 extends out of the movable cavity 111, and the distal end of the syringe barrel 121 is located within the visual field range of the imaging module 130.

[0050] Please continue to refer to Figure 3 , the first tube body 141 is connected to the proximal end of the syringe barrel 121, and the first tube body 141 is used to drive the syringe barrel 121 to move toward the proximal end close to the syringe barrel 121. Medical staff can pull the proximal end of the first tube body 141 to drive the syringe barrel 121 to retract into the movable cavity 111, so as to avoid the syringe barrel 121 extending out of the movable cavity 111, which affects the normal insertion of the insertion part 200, etc., and improves the use effect of the front end assembly 100 and the passing performance of the insertion part 200.

[0051] In addition, the first tube body 141 can inject a medium into the syringe barrel 121, and the medium pushes the injection needle 122 out of the syringe barrel 121. Exemplarily, medical staff inject the medium toward the proximal end of the first tube body 141 and perform a pressure treatment on the medium. Among them, the specific pressure of the medium can be set to a preset pressure value. The pressure of the medium is stable, and its pushing effect on the piston member 124 is relatively stable. Furthermore, the medium can stably push the injection needle 122 to the second preset position, improving the movement stability of the injection needle 122.

[0052] In some other cases, the driving mechanism 140 may include an elastic bladder (not shown in the figure). The elastic bladder is filled with a medium, the pressure of the medium in the elastic bladder is a preset pressure value, and the elastic bladder is connected to the syringe barrel 121. When the elastic bladder is triggered, the medium can be quickly injected into the syringe barrel 121 and push the piston member 124. Among them, the triggering method includes but is not limited to opening a valve between the syringe barrel 121 and the elastic bladder, etc. This setting can also prompt the injection needle 122 to quickly extend, and will not be elaborated here.

[0053] In this embodiment, please refer to Figure 6, the front-end component 100 may further include a second tube body 143, and the second tube body 143 is connected to the piston member 124 of the needle-puncturing mechanism 120. The second tube body 143 is redundantly arranged within the syringe barrel 121. Herein, the redundant arrangement means that the length of the second tube body 143 is set to be long enough. For example, the length of the second tube body 143 may be greater than or equal to the length of the syringe barrel 121 to prevent the second tube body 143 from being too short and affecting the movement range of the piston member 124. The distal end of the second tube body 143 communicates with the first channel 1241, and the second tube body 143 can inject the medium toward the distal end of the injection needle 122. The piston member 124 can drive the second tube body 143 to move so as to always maintain the communication between the second tube body 143 and the first channel 1241. This arrangement can ensure that the injection needle 122 can inject the medium and improve the functional stability of the injection needle 122.

[0054] More specifically, the second tube body 143 is disposed through the first tube body 141. Further, the outer diameter of the second tube body 143 is smaller than the inner diameter of the first tube body 141, and the second tube body 143 can be inserted into the first tube body 141, and the second tube body 143 can be slidably arranged relative to the first tube body 141. This arrangement can not only ensure the driving and injection effects of the second tube body 143, but also improve the integration degree of the front-end component 100, reduce the pipeline layout, and improve the assembly efficiency.

[0055] Preferably, the piston member 124 can be in interference fit with the cavity wall forming the injection cavity 123. Further, the piston member 124 can divide the injection cavity 123 into two regions, which can prevent the medium from leaking. The peripheral wall of the piston member 124 is configured as an arc surface. This arrangement can reduce the contact surface between the piston member 124 and the cavity wall forming the injection cavity 123, so that the piston member 124 can be more easily inserted into the injection cavity 123. The piston member 124 and the cavity wall have a smaller contact surface, and the piston member 124 in interference fit is more likely to deform, which also reduces the elastic force of the piston member 124 and reduces the possibility of wear and friction. This helps to reduce the energy loss and wear of the piston member 124 during movement and extends the service life of the endoscope 1.

[0056] In another case, the second tube body 143 can be independently arranged from the first tube body 141. Specifically, the second tube body 143 is located outside the first tube body 141, and the first tube body 141 and the second tube body 143 are arranged at intervals, which will not be elaborated herein.

[0057] In another embodiment, please refer to Figure 7 and Figure 8, a second channel 1211 is provided on the tube wall of the syringe barrel 121. The second channel 1211 extends along the axis of the syringe barrel 121. The arrangement of the second channel 1211 inside the tube wall of the syringe barrel 121 not only simplifies the structure but also improves the efficiency of the medium flow. Opposite ends of the second channel 1211 penetrate through the inner wall of the syringe barrel 121, and both opposite ends of the second channel 1211 communicate with the injection chamber 123. When the piston member 124 slides to the second preset position, the distal end of the injection needle 122 extends out of the syringe barrel 121, and the first channel 1241 communicates with the second channel 1211. Among them, the second preset position is between the opposite ends of the second channel 1211. The medium can pass through the second channel 1211 and flow into the first channel 1241. At this time, under the influence of the second channel 1211, the thrust of the medium on the piston member 124 is weakened, and the medium flows into the injection needle 122 through the first channel 1241. The medium can accurately push the piston member 124 to the second preset position, improve the insertion accuracy of the injection needle 122, and at the same time the medium is automatically injected into the injection needle 122, reducing the operation steps and improving the operation efficiency.

[0058] More specifically, please continue to refer to Figure 7 and Figure 8 , the needle puncture mechanism 120 may further include a second elastic member 125. The second elastic member 125 may be a spring or a spring sheet, etc., and this embodiment does not limit it. The second elastic member 125 is located in the injection chamber 123. One end of the second elastic member 125 is connected to the inner wall of the syringe barrel 121, and the other end is connected to the end of the piston member 124 away from the injection needle 122. The second elastic member 125 is used to drive the piston member 124 to move toward the proximal side close to the syringe barrel 121. Exemplarily, the medium flows into the injection needle 122 and is injected into the affected part. The pressure of the medium drops, and the thrust of the medium on the piston member 124 is weakened. The second elastic member 125 can move the piston member 124 toward the proximal side close to the syringe barrel 121. Under the action of the second elastic member 125, the piston member 124 moves to block the second channel 1211, and the injection needle 122 is automatically pulled out of the affected part. The first channel 1241 and the injection chamber 123 are separated from each other to prevent the body fluid in the cavity from flowing back into the insertion part 200. On the premise that the first channel 1241 and the injection chamber 123 are separated from each other, medical staff can apply negative pressure to the first tube body 141, and the negative pressure can draw back the medium in the first tube body 141. Under the action of the negative pressure and the elastic force of the second elastic member 125, the injection needle 122 retracts into the injection chamber 123, avoiding scratching the cavity wall when the insertion part 200 is pulled out, and further improving the safety of the needle puncture mechanism 120.

[0059] The inner wall of the syringe barrel 121 is provided with a guiding groove (not shown in the figure), in other words, the inner wall forming the injection cavity 123 is provided with a guiding groove. Specifically, the inner wall of the syringe barrel 121 is recessed to form the guiding groove. The guiding groove extends along the axis of the syringe barrel 121. A convex block is provided on the circumferential side of the piston member 124, and the convex block and the guiding groove are correspondingly arranged. For example, the width of the convex block is less than or equal to the groove width of the guiding groove, and this embodiment does not limit it. The convex block is embedded in the guiding groove, and the convex block can move together with the piston member 124. For the convex block, the guiding groove has a guiding function, and this setting can prevent the groove wall forming the guiding groove from hindering the circumferential rotation of the piston member 124, ensuring that the first channel 1241 can communicate with the second channel 1211, and further improving the reliability of the needle piercing mechanism 120. In addition, the guiding groove can also limit the sliding path of the convex block, that is, limit the maximum protruding length of the injection needle 122, and prevent the injection needle 122 from protruding excessively and piercing the body cavity wall.

[0060] In one case, please refer to Figure 8 , the injection needle 122 has an injection channel 1221 adapted to the flowing medium, and the cross-sectional area ratio between the injection channel 1221 and the injection cavity 123 is 1:12 - 1:5, such as 1:12, 1:10 or 1:5, etc., and this embodiment does not limit it. This cross-sectional area ratio should not be set too small or too large. When this cross-sectional area is set too small, the injection channel 1221 of the injection needle 122 is small, and the medium will continuously act on the piston member 124, forcing the piston member 124 to squeeze the cavity wall forming the injection cavity 123 and the hole wall forming the opening 1212, resulting in an excessive protruding length of the injection needle 122 and damage to the needle piercing mechanism 120. When this cross-sectional area is set too large, the injection channel 1221 of the injection needle 122 is large, and the medium will flow out quickly from the injection channel 1221 of the injection needle 122, resulting in the medium not pushing the piston member 124 to the designated position. An appropriate cross-sectional area ratio can balance the driving effect of the medium on the piston member 124, the injection effect of the injection needle 122, etc., so as to achieve the medium pushing the piston member 124 to move to the designated position, the medium can be quickly injected from the injection needle 122, and improve the use efficiency and use effect of the front-end assembly 100.

[0061] In this embodiment, please refer back to Figure 3 , the distal end of the syringe barrel 121 is provided with an opening 1212, and the shape and size of the opening 1212 are adapted to the injection needle 122. For example, if the injection needle 122 is a slender cylindrical shape, the opening 1212 is correspondingly configured as a circular hole, etc. The injection needle 122 is slidably fitted in the opening 1212, and the injection needle 122 can slide into or out of the injection cavity 123 along the axis of the opening 1212.

[0062] Preferably, please continue to refer to Figure 3, chamfers are provided at opposite ends of the hole wall forming the opening 1212. Among them, the chamfer can be a rounded chamfer or an inclined chamfer, etc., and this implementation does not limit it. Further, the edge of the opening 1212 can form a smooth arc surface or an inclined surface. When the injection needle 122 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 122 can enter the hole along a more stable path. This smooth transition reduces the friction and collision between the injection needle 122 and the hole wall, reduces the risk of damage to the injection needle 122, and improves the accuracy and efficiency of the operation at the same time.

[0063] To achieve the above and other related purposes, the present application provides an insertion part 200. Please refer to Figure 9 , the insertion part 200 includes the aforementioned front-end assembly 100. In this way, the insertion part 200 has the beneficial effects of any of the above-mentioned solutions, which will not be elaborated here.

[0064] To achieve the above and other related purposes, the present application provides an endoscope 1. Please refer to Figure 9 , the endoscope 1 includes the aforementioned insertion part 200. In this way, the endoscope 1 has the beneficial effects of any of the above-mentioned solutions, which will not be elaborated here. The endoscope 1 of the embodiments of the present application can be a nephroscope, a bronchoscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, an oral endoscope, a laryngoscope, a vaginoscope, a laparoscope, an arthroscope, etc.

[0065] The technical solution adopted by the present invention can achieve the following beneficial effects: The syringe barrel 121 can slide into or out of the movable cavity 111. When the syringe barrel 121 slides out of the movable cavity 111, the distal end of the syringe barrel 121 can be within the field of view of the imaging module 130. Medical staff can simultaneously observe the position information of the syringe barrel 121 and the affected part, etc., and adjust the endoscope 1 based on this information to guide the adjustment of the insertion direction and position of the injection needle 122 to ensure that the injection needle 122 can accurately penetrate the affected part. This setting can improve the treatment effect, reduce the damage to other tissues, avoid the influence of the bending and twisting of the endoscope 1 in the human body cavity on the puncture effect of the puncture mechanism 120, reduce the probability of mis-puncture, and reduce the surgical risk.

[0066] In addition, the driving mechanism 140 can inject a medium towards the syringe barrel 121 to push the injection needle 122. 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 injection needle 122 can be changed, so as to adapt to different affected parts, avoid situations such as being unable to penetrate the affected part or puncturing the cavity, and significantly improve the implementation effect and efficiency of the front-end assembly 100.

[0067] It should be noted that in this article, the terms "include", "comprise" or any other variants thereof are 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 further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0068] 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, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0069] The above is only the specific embodiment 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 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; An imaging module disposed within the front shell; A needle puncturing mechanism including a syringe barrel and a syringe needle. The syringe barrel can slide into or out of the active cavity. The syringe barrel has an injection cavity. The syringe needle is slidably fitted within the injection cavity. A piston member is disposed at the proximal end of the syringe needle. The piston member is provided with a first passage communicating with the syringe needle. The piston member is slidably fitted within the injection cavity. A second passage is provided on the tube wall of the syringe barrel. Opposite ends of the second passage penetrate the inner wall of the syringe barrel; And A driving mechanism drivingly connected to the syringe barrel and communicating with the injection cavity; Wherein, when the syringe barrel slides out of the active cavity and moves to a first preset position, the distal end of the syringe barrel is within the field of view of the imaging module, and the driving mechanism can inject a medium with a preset pressure value into the syringe barrel. The medium can enter the injection cavity and push the piston member to cause the syringe needle to extend out of the distal end of the syringe barrel. When the piston member slides to a second preset position, the first passage communicates with the second passage, and the medium can pass through the first passage and the second passage and flow to the distal end of the syringe needle.

2. The front-end component according to claim 1, wherein The driving mechanism includes a first tube body and a first elastic member. One end of the first elastic member is connected to the cavity wall forming the active cavity, and the other end is connected to the proximal end of the syringe barrel. The first tube body is connected to the proximal end of the syringe barrel and is used to drive the syringe barrel to move towards the proximal end of the syringe barrel. The first tube body can inject the medium into the syringe barrel, and the medium pushes the syringe needle to extend out of the syringe barrel.

3. The front-end component according to claim 2, characterized in that, The front end assembly further includes a second tube body redundantly disposed within the syringe barrel. The distal end of the second tube body communicates with the first passage, and the second tube body can inject the medium towards the distal end of the syringe needle.

4. The front-end component according to claim 3, characterized in that The second tube body is disposed through the first tube body; And / or, the peripheral wall of the piston member is configured as an arc surface.

5. The front-end component according to claim 2, characterized in that, The second passage extends along the axis of the syringe barrel.

6. The front-end component according to claim 5, wherein The needle puncturing mechanism further includes a second elastic member located within the injection cavity. One end of the second elastic member is connected to the inner wall of the syringe barrel, and the other end is connected to the end of the piston member away from the syringe needle. The second elastic member is used to drive the piston member to move towards the proximal side of the syringe barrel; And / or, a guiding groove is provided on the inner wall of the syringe barrel. The guiding groove extends along the axis of the syringe barrel. A convex block is provided on the peripheral side of the piston member, and the convex block is embedded within the guiding groove.

7. The front-end component according to claim 1, characterized in that, The syringe needle has an injection channel adapted to flow the medium. The cross-sectional area ratio between the injection channel and the injection cavity is 1:12 - 1:5; And / or, an opening is provided at the distal end of the syringe barrel. The syringe needle is slidably fitted within the opening, and chamfers are provided at opposite ends of the hole wall forming the opening.

8. An insertion part, characterized in that, Comprising the front end assembly according to any one of claims 1 - 7.

9. An endoscope, characterized in that, Comprising an insertion part as described in claim 8.

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