Endoscope

Abstract

The utility model discloses an endoscope, which comprises an insertion main body, the operation main body comprises a main shell and a connecting cylinder, and the connecting cylinder is provided with a first through hole in a penetrating manner; a second through hole is formed in the inserting barrel in a penetrating manner, and the rear section is inserted into the first through hole; the front section of the inserting barrel is fixedly sleeved with the fixed barrel, a third through hole is formed in the fixed barrel in the front-back direction in a penetrating mode, the outer side of the inserting body is fixedly sleeved with the fixed barrel through the third through hole, and the rear section of the inserting body is driven to stretch into the inner cavity of the main shell through the second through hole; the driving cylinder fixedly sleeves the outer side of the inserting cylinder and is clamped and limited between the fixed cylinder and the main shell; and under the driving of external force, the driving barrel drives the inserting barrel, the fixed barrel and the inserting main body to rotate and move relative to the connecting barrel. The endoscope has the advantages of being easy and convenient to disassemble and assemble and good in sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to an endoscope. Background Art

[0002] Existing endoscopes generally consist of an operating body and an insertion body. The insertion body, in addition to being able to bend, also needs to be able to rotate to a certain degree. This means that the insertion body's axis serves as the rotational axis, allowing it to rotate relative to the operating body at a certain angle to accommodate a wider range of observation and treatment.

[0003] To achieve this rotation function, existing endoscopes generally have a silicone sleeve fixedly attached to the outside of the insert body, and the rotation of the insert body is driven by the rotation of the silicone sleeve. However, this structure has certain drawbacks. For example, while meeting the rotation function, the silicone sleeve and the insert body need to be well sealed at the joint. Firstly, because the endoscope needs to be disinfected and sterilized, a good seal helps prevent liquid from entering the interior of the endoscope; secondly, because during the use of the endoscope, surgical fluid may be present inside the insert body, and a good seal helps prevent the liquid inside the insert body from leaking out through the silicone sleeve.

[0004] Therefore, current endoscopes, especially at the silicone sleeve, that is, the active rotating part of the insertion body, have the disadvantages of numerous sealing structure parts, complex assembly operations, and time-consuming and labor-intensive mass production. Utility Model Content

[0005] The main purpose of the utility model is to provide an endoscope, aiming to solve the problems in the traditional technology of complex sealing structure and inconvenient assembly and disassembly operations at the active rotating part of the insertion body.

[0006] To achieve the above-mentioned purpose, the present invention provides an endoscope comprising:

[0007] Inserted into the main body and arranged in a front-to-back extension direction;

[0008] The operating body includes a main shell and a connecting cylinder protruding from the front end of the main shell, wherein the connecting cylinder is penetrated by a first through hole in the front-to-back direction and communicates with the inner cavity of the main shell;

[0009] The plug-in cylinder is provided with a second through hole in the front-to-back direction, and the rear section of the plug-in cylinder is plugged into the first through hole;

[0010] a fixed cylinder, fixedly sleeved on the front section of the plug-in cylinder, the fixed cylinder having a third through hole extending along the front-to-back direction, the fixed cylinder being fixedly sleeved on the outside of the insertion body through the third through hole, and driving the rear section of the insertion body to extend into the inner cavity of the main shell through the second through hole; and

[0011] The driving cylinder is fixedly sleeved on the outside of the plug-in cylinder and is clamped and limited between the fixed cylinder and the main housing;

[0012] Wherein, under the driving force of external force, the driving cylinder drives the plug-in cylinder, the fixing cylinder and the inserting body to rotate relative to the connecting cylinder.

[0013] Optionally, the front end surface of the connecting cylinder is partially convexly provided to form a first convex rib;

[0014] The plug-in cylinder includes a first cylinder section and a second cylinder section connected in sequence from front to back. A second rib extending in the front-to-back direction is formed on a local side surface of the first cylinder section. The second cylinder section is plugged into the first through hole to drive the rear end surface of the second rib to abut against the front end surface of the connecting cylinder.

[0015] Driven by an external force, the driving cylinder drives the first convex rib to be movably adjusted in the direction of approaching and moving away from the second convex rib.

[0016] Optionally, the main housing extends radially outwardly of the connecting cylinder to form a first step surface facing forward, and the fixed cylinder extends radially outwardly of the first cylinder section to form a second step surface facing backward;

[0017] The driving cylinder is clamped and limited between the first step surface and the second step surface.

[0018] Optionally, the side surface of the second rib is concavely formed to form a buckle groove, the inner wall of the driving cylinder is convexly provided with a locking protrusion, and the locking protrusion is buckled and connected with the buckle groove; and / or,

[0019] The outer surface of the driving cylinder is provided with an anti-slip structure.

[0020] Optionally, the rear end surface of the second barrel section is provided with a plurality of slots in sequence along the circumference of the second through hole to separate the rear section of the second barrel section into a plurality of elastic arms, and the outer peripheral side wall of each elastic arm is convex to form a buckle. When the second barrel section is inserted into the first through hole, each of the buckles extends backward from the first through hole and is buckled and fixed on the rear end surface of the connecting barrel body.

[0021] Optionally, the fixed cylinder and the plug-in cylinder are made of a hard material by integral molding.

[0022] Optionally, the fixed cylinder and the plug-in cylinder are separately formed, and the fixed cylinder is made of an elastic material, and the plug-in cylinder is made of a hard material.

[0023] Optionally, the fixed cylinder and the plug-in cylinder are separately formed, and the fixed cylinder is made of elastic material, and the plug-in cylinder is made of hard material;

[0024] The second convex rib extends forward to form an extension rib, and at least the front section of the extension rib is arranged to be convex with a height gradually decreasing from the back to the front;

[0025] A slot is formed in the wall of the third through hole toward the rear, the rear section of the fixed cylinder is sleeved on the front section of the first cylinder, and the slot is connected to the extension rib by insertion.

[0026] Optionally, at least two second ribs are evenly spaced along the circumference of the second barrel section, and one first rib is correspondingly provided between every two adjacent second ribs.

[0027] Optionally, an extension length of the first rib in the front-to-back direction is not greater than an extension length of the second rib in the front-to-back direction.

[0028] Optionally, at the connection point between the two, the diameter of the first through hole is not less than the outer diameter of the second barrel section;

[0029] The endoscope further includes a sealing ring, which is sleeved between the first through hole and the second barrel section.

[0030] Optionally, the main shell includes a first shell plate and a second shell plate sequentially connected along the radial direction of the connecting cylinder, and the first shell plate and the second shell plate are detachably connected to jointly enclose and define an inner cavity;

[0031] The first shell plate is fixedly connected to the connecting cylinder, and at the connection between the two, the outer peripheral side wall of the connecting cylinder and / or the first shell plate is provided with a sealing groove, and the second shell plate is correspondingly provided with a sealing protrusion, and the sealing protrusion is sealed and connected to the sealing groove.

[0032] In the technical solution provided by the present invention, since the fixed cylinder is pre-connected or fixedly sleeved on the outer side of the front section of the insertion body and the plug-in cylinder by an integral molding method, and the connecting cylinder is pre-connected or fixed to the main shell by an integral molding method, it is only necessary to sleeve the driving cylinder on the outer side of the plug-in cylinder and insert the rear section of the plug-in cylinder into the first through hole, so as to achieve the purpose of inserting the insertion body into the inner cavity of the main shell, and the installation of the fixed cylinder, the plug-in cylinder, the connecting cylinder and the driving cylinder can be completed at the same time, which has the characteristics of simple disassembly and assembly; and, since there are at least multiple layers of sleeve protection of the plug-in cylinder, the connecting cylinder and the driving cylinder at the connection between the insertion body and the operating body (that is, the active rotation part of the insertion body), it helps to greatly extend the flow path length and flow tortuosity of the liquid, thereby helping to significantly improve the sealing effect of this part. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0034] Figure 1 A three-dimensional schematic diagram of an embodiment of an endoscope provided by the utility model;

[0035] Figure 2 for Figure 1 Schematic diagram of the main structure of the endoscope;

[0036] Figure 3 for Figure 2 An enlarged schematic diagram of part of the structure at the operating body;

[0037] Figure 4 for Figure 2 A three-dimensional schematic diagram of the middle plug-in cylinder;

[0038] Figure 5 for Figure 2 A three-dimensional schematic diagram of the fixed cylinder;

[0039] Figure 6 for Figure 2 A three-dimensional schematic diagram of the middle drive cylinder;

[0040] Figure 7 for Figure 2 Schematic diagram of the assembly of the fixed cylinder, plug-in cylinder and connecting cylinder at one viewing angle;

[0041] Figure 8 for Figure 2 Schematic diagram of the assembly of the fixed cylinder, plug-in cylinder and connecting cylinder from another perspective;

[0042] Figure 9 for Figure 2 A three-dimensional schematic diagram of the second shell plate from another perspective.

[0043] Description of Figure Numbers:

[0044] 100 insertion body; 200 operating body; 210 main shell; 211 first step surface; 212 first shell plate; 212a sealing groove; 213 second shell plate; 213a sealing protrusion; 220 connecting cylinder; 221 first through hole; 222 first rib; 300 plug-in cylinder; 301 second through hole; 310 first cylinder section; 311 second rib; 311a buckle groove; 311b extension rib; 320 second cylinder section; 321 slot; 322 elastic support arm; 323 buckle; 400 fixing cylinder; 410 second step surface; 420 third through hole; 430 slot; 500 driving cylinder; 510 buckle; 520 anti-slip structure; 610 sealing ring.

[0045] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] See also Figures 1 to 9The present invention provides an endoscope, which mainly includes an insertion body 100, an operating body 200, a plug-in cylinder 300, a fixed cylinder 400 and a driving cylinder 500. The insertion body 100 is arranged to extend in the front-to-back direction; the operating body 200 includes a main shell 210 and a connecting cylinder 220 protruding from the front end of the main shell 210, and the connecting cylinder 220 is provided with a first through hole 221 in the front-to-back direction to communicate with the inner cavity of the main shell 210; the plug-in cylinder 300 is provided with a second through hole 301 in the front-to-back direction, and the rear section of the plug-in cylinder 300 is plugged into the first through hole 221; the fixed cylinder 400 is fixedly sleeved on the front section of the plug-in cylinder 300, and the fixed cylinder 400 is provided with a third through hole 401 in the front-to-back direction. 20, the fixed cylinder 400 is fixedly sleeved on the outer side of the insertion body 100 through the third through hole 420, and drives the rear section of the insertion body 100 to extend into the inner cavity of the main shell 210 through the second through hole 301; the driving cylinder 500 is fixedly sleeved on the outer side of the plug-in cylinder 300, and is clamped and limited between the fixed cylinder 400 and the main shell 210; wherein, under the drive of external force, the driving cylinder 500 drives the plug-in cylinder 300, the fixed cylinder 400 and the insertion body 100 to rotate relative to the connecting cylinder 220.

[0050] In the technical solution provided by the present invention, since the fixed cylinder 400 is pre-connected or fixedly sleeved on the outer side of the front section of the insertion body 100 and the plug cylinder 300 by an integral molding method, and the connecting cylinder 220 is pre-connected or fixed to the main shell 210 by an integral molding method, it is only necessary to sleeve the driving cylinder 500 on the outer side of the plug cylinder 300 and insert the rear section of the plug cylinder 300 into the first through hole 221 to achieve the purpose of inserting the insertion body 100 into the inner cavity of the main shell 210. , and the installation of the fixed cylinder 400, the plug-in cylinder 300, the connecting cylinder 220 and the driving cylinder 500 can be completed in place at the same time, which has the characteristics of easy assembly and disassembly; and, since there are at least multiple layers of socket protection such as the plug-in cylinder 300, the connecting cylinder 220 and the driving cylinder 500 at the connection between the insertion body 100 and the operating body 200 (that is, the active rotation part of the insertion body 100), it helps to greatly extend the flow path length and flow tortuosity of the liquid, thereby helping to significantly improve the sealing effect of this part.

[0051] In this design, the insertion body 100 extends generally in the front-to-back direction and comprises an insertion tube and a head-end structure fixed to the front end of the insertion tube. The head-end structure may be equipped with, for example, an imaging device for capturing image information and an illumination device for illuminating the imaging device, as needed. The insertion tube may be configured to be at least partially bendable, allowing for flexible adjustment of the orientation of the imaging surface of the imaging device in the head-end structure.

[0052] The insertion body 100 and the operating body 200 are mechanically connected via, for example, the aforementioned plug-in cylinder 300, the fixed cylinder 400, and the drive cylinder 500. It will be appreciated that, through the connection of the plug-in cylinder 300, the fixed cylinder 400, and the drive cylinder 500, the insertion body 100 can at least rotate about its own axis relative to the operating body 200. Furthermore, depending on practical needs, the insertion body 100 can also be configured to allow a certain degree of forward and backward telescopic movement relative to the operating body 200.

[0053] The operating body 200 includes a main housing 210 and a connecting cylinder 220. The main housing 210 can be configured in any suitable shape, such as a pistol, a handle, a straight rod, or a disc, depending on actual needs. The main housing 210 can be formed directly into a one-piece structure through a process such as injection molding, or it can be formed from at least two separate shell panels that are then detachably or non-detachably connected.

[0054] Specifically, please combine Figure 2 、 Figure 3 and Figure 9 In one embodiment, the main housing 210 includes a first shell plate 212 and a second shell plate 213 connected in sequence along the radial direction of the connecting cylinder 220. The first shell plate 212 and the second shell plate 213 are detachably connected to define an inner cavity when connected. Accordingly, the connecting cylinder 220 can be configured as a structure independent of the first shell plate 212 and the second shell plate 213, and can be detachably connected to the first shell plate 212 and the second shell plate 213 respectively. Alternatively, the first shell plate 212 and the connecting cylinder 220 are integrally formed and then detachably connected to the second shell plate 213.

[0055] The first shell plate 212 is fixedly connected to the connecting cylinder 220. Specifically, the first shell plate 212 can be directly integrally formed with a portion of the outer peripheral side wall of the connecting cylinder 220, so that when connected to the second shell plate 213, the front section of the connecting cylinder 220 extends forward from the inner cavity of the main shell 210, and the rear section of the connecting cylinder 220 extends into the inner cavity of the main shell 210. In this way, the molded area between the first shell plate 212 and the connecting cylinder 220 can be increased, and the connection area between the first shell plate 212, the second shell plate 213, and the connecting cylinder 220 can be increased, which is conducive to a more stable connection.

[0056] Furthermore, a sealing groove 212a can be provided at the connection between the first shell plate 212, the connecting cylinder 220 and the second shell plate 213, for example, on the outer peripheral side wall of the connecting cylinder 220 and / or the first shell plate 212, and a sealing protrusion 213a can be provided on the second shell plate 213 accordingly, and the sealing protrusion 213a and the sealing groove 212a are sealed and connected. The size, structure, etc. of the sealing groove 212a and the sealing protrusion 213a are designed to be adapted. Specifically, when the first shell plate 212 and the outer peripheral side wall of the connecting cylinder 220 are partially integrally formed as described above, the sealing groove 212a can extend along the circumference of the connecting cylinder 220 to be opened at the remaining outer peripheral side wall, and can also extend to be opened at all remaining connection surfaces of the first shell plate 212 and the second shell plate 213, to ensure that the sealing effect of the connection between the first shell plate 212, the second shell plate 213 and the connecting cylinder 220 is enhanced.

[0057] Please combine Figures 2 to 3 、 Figures 7 and 8 The connecting cylinder 220 is provided with a first through-hole 221 extending in the front-to-back direction, communicating with the inner cavity of the main housing 210. A first rib 222 is partially formed on the front surface of the connecting cylinder 220. The plug-in cylinder 300 comprises a first cylinder section 310 and a second cylinder section 320, connected in sequence from front to back. A second rib 311 extending in the front-to-back direction is partially formed on the side surface of the first cylinder section 310. The second cylinder section 320 is plugged into the first through-hole 221, driving the rear end surface of the second rib 311 into contact with the front end surface of the connecting cylinder 220. Driven by an external force, the driving cylinder 500 drives the first rib 222 to be movable and adjustable in the direction of approaching and moving away from the second rib 311.

[0058] The second barrel section 320 of the plug-in barrel 300 is at least partially plugged into the first through hole 221.

[0059] Among them, in order to make the rotation between the second barrel section 320 and the first through hole 221 of the plug-in barrel 300 smoother, at at least part of the connection between the two, the aperture of the first through hole 221 is not less than the outer diameter of the second barrel section 320, that is, a certain gap is reserved between the second barrel section 320 and the first through hole 221 to avoid direct surface contact between the two and increase friction damping during rotation.

[0060] Next, the endoscope further includes a sealing ring 610, which is sleeved between the first through hole 221 and the second barrel section 320. The sealing ring 610 is specifically made of an elastic material, and its transverse cross-section can be, for example, circular or quasi-circular in shape, so as to ensure a sealed connection between the first through hole 221 and the second barrel section 320, thereby isolating the inner cavity of the operating body 200 from the external environment of the endoscope, thereby forming a sealed environment in the inner cavity of the operating body 200; and it can also minimize the contact area with the hole wall of the first through hole 221 and / or the outer peripheral side surface of the second barrel section 320, thereby reducing the damping force during relative rotation between the second barrel section 320 and the connecting barrel 220, thereby making it easier to control the rotation of the driving barrel 500.

[0061] In one embodiment, the rear end surface of the second barrel section 320 is provided with a plurality of slots 321, sequentially extending forward along the circumference of the second through hole 301, to separate the rear end of the second barrel section 320 into a plurality of elastic arms 322. Each elastic arm 322 is provided with a protruding buckle 323 on its outer peripheral sidewall. When the second barrel section 320 is inserted into the first through hole 221, each buckle 323 extends rearward from the first through hole 221 and is locked and fixed to the rear end surface of the connecting barrel 220. This creates a claw structure at the rear end of the second barrel section 320, which does not hinder the smooth insertion of the second barrel section 320 into the first through hole 221. Furthermore, the mutual locking between the buckle 323 and the rear end surface of the connecting barrel 220 provides a rearward tightening force for the entire connecting barrel 300.

[0062] When the claw structure is formed at the rear section of the second barrel section 320 as described above, the structure of the first through hole 221 connected thereto can be further optimized. Specifically, for example, in the direction from front to back, the first through hole 221 is set to be a tapered hole with a gradually smaller aperture. In this way, the aperture of the front section of the first through hole 221 is larger, making it easier for the claw structure to be inserted smoothly. And during the plug-in process, under the action of the gradually increasing squeezing force brought about by the gradually smaller aperture, the claw structure gradually shrinks and deforms. Finally, when plugged into the larger aperture of the rear section of the first through hole 221, the claw structure quickly deforms and resets, and the buckle 323 is buckled onto the rear end surface of the connecting barrel 220, which is more conducive to improving the connection strength between the second barrel section 320 and the connecting barrel 220.

[0063] Furthermore, it can be arranged that in the direction from front to back, the outer diameter of the second barrel section 320 at least adjacent to the barrel section of the claw structure is gradually reduced to form a conical surface adapted to the shape of the first through hole 221, which is more conducive to the smooth insertion of the claw structure.

[0064] In one embodiment, the main housing 210 extends radially outwardly from the connecting cylinder 220 to form a forward-facing first step surface 211, while the fixed cylinder 400 extends radially outwardly from the first cylinder section 310 to form a rearward-facing second step surface 410. The driving cylinder 500 is clamped and restrained between the first step surface 211 and the second step surface 410. Second ribs 311 are partially formed on the outer circumferential surface of the first cylinder section 310. When the second cylinder section 320 is inserted and connected into the first through-hole 221, the rear end surface of the second rib 311 abuts against the front end surface of the connecting cylinder 220, effectively limiting further insertion of the second cylinder section 320. The second rib 311 also prevents the connecting cylinder 220 from moving forward. Combined with the aforementioned structural design of the elastic support arm 322 and the buckle 323, the connecting cylinder 300 is securely fixed to the connecting cylinder 220. On the other hand, when the rear end surface of the second rib 311 is in movable contact with the front end surface of the connecting cylinder 220, a relatively closed arc-shaped movable space is formed between the second rib 311, the front end surface of the connecting cylinder 220, the second step surface 410, and the driving cylinder 500. This movable space allows the first rib 222 to move more stably therein.

[0065] It can be understood that after the connection cylinder 220 and the plug-in cylinder 300 are assembled, the buckle 323 abuts the rear end surface of the connection cylinder 220; the rear end surface of the second rib 311 of the first cylinder section 310 abuts the front end surface of the connection cylinder 220, thereby achieving mutual restraint between the connection cylinder 220 and the plug-in cylinder 300. Therefore, if the length distance between the rear end surface of the second rib 311 of the plug-in cylinder 300 and the engaging surface of the buckle 323 is defined as H1, and the length distance between the front end surface and the rear end surface of the connection cylinder 220 is defined as H2, by adjusting the size relationship between H1 and H2, the size of the plug-in fastening force between the connection cylinder 220 and the plug-in cylinder 300 can be adjusted, thereby achieving optimal rotation performance and sealing performance. Specifically, when H1 is equal to H2, or even slightly smaller than H2, the tightening force is relatively increased, thereby enhancing the sealing performance. However, the rotation between the connecting cylinder 220 and the plug cylinder 300 is relatively laborious. Conversely, when H1 is slightly larger than H2, the rotation between the connecting cylinder 220 and the plug cylinder 300 is relatively labor-saving. However, the tightening force may be relatively reduced, thereby weakening the sealing performance. In actual applications, the size relationship between H1 and H2 can be reasonably designed according to actual needs.

[0066] Furthermore, at least two second ribs 311 are evenly spaced along the circumference of the second barrel section 320, and a first rib 222 is correspondingly provided between every two adjacent second ribs 311. It can be understood that the more second ribs 311 are provided on the second barrel section 320, that is, the smaller the curvature of the arc-shaped activity space enclosed between every two adjacent second ribs 311, the smaller the activity stroke of the first rib 222 in the arc-shaped activity space, and the smaller the rotation angle range of the insertion body 100 relative to the operating body 200. Conversely, the fewer second ribs 311 are provided on the second barrel section 320, that is, the larger the curvature of the arc-shaped activity space enclosed between every two adjacent second ribs 311, the larger the activity stroke of the first rib 222 in the arc-shaped activity space, and the larger the rotation angle range of the insertion body 100 relative to the operating body 200. As Figures 1 to 9 In the illustrated structure, two second ribs 311 are provided, and the two second ribs 311 are symmetrical about the center of the second barrel section 320. The arc of the arc-shaped movable space enclosed by the two second ribs 311 is approximately π, allowing the insertion body 100 to rotate relative to the operating body 200 from 0° to 180°.

[0067] In view of the above, the forward and backward extension length of the first rib 222 is not greater than the forward and backward extension length of the second rib 311. This allows the first rib 222 to be laterally stopped by two adjacent second ribs 311 in the circumferential direction without forming a movable abutment with the second step surface 410, thereby preventing friction damping and structural loss caused by friction with the second step surface 410.

[0068] The plug-in barrel 300 is provided with a second through-hole 301 extending in the front-to-back direction, and the fixed barrel 400 is provided with a third through-hole 420 extending in the front-to-back direction. The third through-hole 420 is fixedly sleeved on the outside of the insert body 100. Therefore, the diameter of the third through-hole 420 can be set equal to or slightly smaller than the outer diameter of the insert body 100 at the corresponding position. This helps to form interference between the third through-hole 420 and the insert body 100, effectively preventing the insert body 100 from rotating circumferentially relative to the third through-hole 420, and therefore relative to the fixed barrel 400. The diameter of the second through-hole 301 can be set equal to or slightly larger than the outer diameter of the insert body 100 at the corresponding position.

[0069] In addition, the fixed cylinder 400 is fixedly sleeved on the outside of at least the front section of the first barrel section 310. Specifically, the fixed cylinder 400 can be recessed at its rear end to form a countersunk hole, which is fixedly sleeved on the front end of the first barrel section 310. The aperture of the countersunk hole can be set to be equal to or slightly smaller than the outer diameter of the first barrel section 310 at the corresponding position, so as to facilitate interference between the countersunk hole and the first barrel section 310, effectively preventing the plug-in cylinder 300 from rotating circumferentially relative to the fixed cylinder 400. In this way, the insertion body 100, the fixed cylinder 400, and the plug-in cylinder 300 can be relatively fixed at least in the rotational direction, avoiding relative rotation between the insertion body 100, the fixed cylinder 400, and the plug-in cylinder 300.

[0070] There are various structural solutions for the fixed cylinder 400 and the plug-in cylinder 300 to achieve the above-mentioned purpose:

[0071] In one embodiment, the fixed cylinder 400 and the plug-in cylinder 300 are integrally formed from a hard material. This allows the fixed cylinder 400 and the plug-in cylinder 300 to be integrated into a single cylindrical structure, eliminating the need for sleeve-type fastenings or other similar operations. This integrated structure also provides improved sealing performance. Furthermore, the hard material helps ensure the required structural strength of the fixed cylinder 400 and the plug-in cylinder 300.

[0072] Alternatively, in one embodiment, the fixed cylinder 400 and the plug-in cylinder 300 are formed separately, with the fixed cylinder 400 being made of an elastic material and the plug-in cylinder 300 being made of a hard material. Specific examples of the elastic material include rubber and silicone materials. Through its own elastic deformation, the fixed cylinder 400 and the insert body 100, and the fixed cylinder 400 and the plug-in cylinder 300, can be securely connected.

[0073] In view of this embodiment, the second rib 311 further extends forward to form an extension rib 311b, with at least the front section of the extension rib 311b having a gradually decreasing height from rear to front. A slot 430 is formed through the wall of the third through hole 420, extending rearward. The rear section of the fixed cylinder 400 is inserted into the front section of the first cylinder section 310, and the slot 430 is connected to the extension rib 311b. This gradually decreasing height forms an inclined guide surface, facilitating the smooth insertion of the fixed cylinder 400, made of an elastic material, and the plug-in cylinder 300, made of a hard material. The insertion connection between the slot 430 and the extension rib 311b prevents both the fixed cylinder 400 and the plug-in cylinder 300 from rotating in the circumferential direction.

[0074] Furthermore, when the drive cylinder 500 is sleeved on the outside of the plug-in cylinder 300, it can further extend to simultaneously sleeve on the outside of the connecting cylinder 220, so that when the plug-in cylinder 300 is plugged into place relative to the connecting cylinder 220 (i.e., the buckle 323 is buckled and fixed to the rear end surface of the connecting cylinder 220), the drive cylinder 500 can be precisely clamped and limited in the front and back upward direction by the first step surface 211 and the second step surface 410. In one embodiment, the side surface of the second rib 311 is recessed to form a buckle groove 311a, and the inner cylinder wall of the drive cylinder 500 is convexly provided with a buckle protrusion 510, which is buckled and connected with the buckle groove 311a. In this way, the drive cylinder 500, the insertion body 100, the fixed cylinder 400, and the plug cylinder 300 can be relatively fixed at least in the rotational direction, thereby preventing relative rotation between the drive cylinder 500, the insertion body 100, the fixed cylinder 400, and the plug cylinder 300. When the user then applies an external force in the rotational direction to the drive cylinder 500, for example manually or by an electronically controlled device, the drive cylinder 500, the insertion body 100, the fixed cylinder 400, and the plug cylinder 300 synchronously rotate circumferentially relative to the connecting cylinder 220, thereby achieving the rotation purpose.

[0075] And / or in one embodiment, the outer surface of the drive cylinder 500 is provided with an anti-slip structure 520. The specific form of the anti-slip structure 520 is not limited, and can be, but is not limited to, various forms of concave-convex structures, sleeve-type anti-slip sleeves, etc., which helps to increase the connection strength between the hand and the drive cylinder 500 when the user manually rotates the drive cylinder 500, avoid slipping, etc., and contribute to a smooth and safe surgical operation.

[0076] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An endoscope, characterized in that: include: Inserted into the main body and arranged in a front-to-back extension direction; The operating body includes a main shell and a connecting cylinder protruding from the front end of the main shell, wherein the connecting cylinder is penetrated by a first through hole in the front-to-back direction and communicates with the inner cavity of the main shell; The plug-in cylinder is provided with a second through hole in the front-to-back direction, and the rear section of the plug-in cylinder is plugged into the first through hole; a fixed cylinder, fixedly sleeved on the front section of the plug-in cylinder, the fixed cylinder having a third through hole extending along the front-to-back direction, the fixed cylinder being fixedly sleeved on the outside of the insertion body through the third through hole, and driving the rear section of the insertion body to extend into the inner cavity of the main shell through the second through hole; and The driving cylinder is fixedly sleeved on the outside of the plug-in cylinder and is clamped and limited between the fixed cylinder and the main housing; Wherein, under the driving force of external force, the driving cylinder drives the plug-in cylinder, the fixing cylinder and the inserting body to rotate relative to the connecting cylinder.

2. The endoscope according to claim 1, wherein The front end surface of the connecting cylinder is partially convex to form a first convex rib; The plug-in cylinder includes a first cylinder section and a second cylinder section connected in sequence from front to back. A second rib extending in the front-to-back direction is formed on a local side surface of the first cylinder section. The second cylinder section is plugged into the first through hole to drive the rear end surface of the second rib to abut against the front end surface of the connecting cylinder. Driven by an external force, the driving cylinder drives the first convex rib to be movably adjusted in the direction of approaching and moving away from the second convex rib.

3. The endoscope according to claim 2, wherein: The main housing extends radially outwardly of the connecting cylinder to form a first step surface facing forward, and the fixed cylinder extends radially outwardly of the first cylinder section to form a second step surface facing backward; The driving cylinder is clamped and limited between the first step surface and the second step surface.

4. The endoscope according to claim 2, wherein: The side surface of the second rib is concavely provided with a buckle groove, the inner wall of the driving cylinder is provided with a locking protrusion, and the locking protrusion is buckled and connected with the buckle groove; and / or, The outer surface of the driving cylinder is provided with an anti-slip structure.

5. The endoscope according to claim 2, wherein: The rear end surface of the second barrel section is provided with a plurality of slots in sequence along the circumference of the second through hole to separate the rear section of the second barrel section into a plurality of elastic arms. The outer peripheral side wall of each elastic arm is convex to form a buckle. When the second barrel section is inserted into the first through hole, each buckle extends backward from the first through hole and is buckled and fixed on the rear end surface of the connecting barrel body.

6. The endoscope according to claim 1, wherein The fixed cylinder and the plug-in cylinder are made of a hard material in one piece.

7. The endoscope according to claim 1, wherein: The fixed cylinder and the plug-in cylinder are separately formed and arranged, and the fixed cylinder is made of elastic material, and the plug-in cylinder is made of hard material.

8. The endoscope according to claim 2, wherein: The fixed cylinder and the plug-in cylinder are separately formed, and the fixed cylinder is made of elastic material, and the plug-in cylinder is made of hard material; The second convex rib extends forward to form an extension rib, and at least the front section of the extension rib is arranged to be convex with a height gradually decreasing from the back to the front; A slot is formed in the wall of the third through hole toward the rear, the rear section of the fixed cylinder is sleeved on the front section of the first cylinder, and the slot is connected to the extension rib by insertion.

9. The endoscope according to claim 2, wherein: At least two second ribs are evenly spaced along the circumference of the second barrel section, and one first rib is correspondingly provided between every two adjacent second ribs.

10. The endoscope according to claim 2, wherein: An extension length of the first rib in the front-to-back direction is not greater than an extension length of the second rib in the front-to-back direction.

11. The endoscope according to claim 2, wherein: At the joint between the two, the diameter of the first through hole is not less than the outer diameter of the second barrel section; The endoscope further includes a sealing ring, which is sleeved between the first through hole and the second barrel section.

12. The endoscope according to claim 1, wherein The main shell includes a first shell plate and a second shell plate sequentially connected along the radial direction of the connecting cylinder, and the first shell plate and the second shell plate are detachably connected to jointly enclose and define an inner cavity; The first shell plate is fixedly connected to the connecting cylinder, and at the connection between the two, the outer peripheral side wall of the connecting cylinder and / or the first shell plate is provided with a sealing groove, and the second shell plate is correspondingly provided with a sealing protrusion, and the sealing protrusion is sealed and connected to the sealing groove.

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