CN219089217U - Endoscope image pickup system and optical bayonet - Google Patents

Abstract

The utility model relates to an endoscope camera system and an optical bayonet, wherein the optical bayonet comprises a lens barrel, two transparent pieces, a lens assembly, a first magnetic piece, a pushing assembly and a knob. The lens barrel is provided with opposite ends. The two transparent pieces are correspondingly and hermetically connected with the opposite ends of the lens barrel. On one hand, as the lens component is positioned in the cavity, the opposite ends of the lens barrel are respectively sealed by the transparent sealing piece, so that the cavity is completely sealed, the lens component is ensured to be in a sealed environment, the sealing effect on the lens component is good, the damage phenomenon can be avoided during the pressure steam sterilization, and the service life of the product can be prolonged; on the other hand, when focusing is needed, through rotating the knob, the knob drives the pushing component to move along the axial direction when rotating, the pushing component drives the second magnetic part connected with the pushing component to move along the axial direction, the second magnetic part drives the first magnetic part to move along the axial direction synchronously through magnetic force, and the first magnetic part drives the lens component to move along the axial direction synchronously, so that focusing is realized.

Description

Endoscope image pickup system and optical bayonet

Technical Field

The application relates to the technical field of medical instruments, in particular to an endoscope camera system and an optical bayonet.

Background

The medical endoscope is applied to minimally invasive surgery and medical diagnosis and inspection, and mainly comprises an endoscope imaging system and a hard lens, wherein the hard lens is connected with an optical bayonet on the endoscope imaging system. In clinical use, a doctor can extend the hard mirror into the body by utilizing a natural hole of the body or making a tiny wound on the body, and then can observe the body in vitro through an endoscope camera system.

The focusing mode of the optical bayonet of the existing medical endoscope mostly adopts a mode that a knob directly drives a lens group to move to realize focusing, so that the lens group in the optical bayonet cannot be well sealed, and further the lens component is easy to damage when pressure steam sterilization is carried out.

Disclosure of Invention

Based on this, it is necessary to overcome the defects of the prior art, and to provide an endoscope imaging system and an optical bayonet, which can ensure a good sealing effect of a lens set while satisfying a focusing function, so as to avoid damage during pressure steam sterilization.

The technical scheme is as follows: an optical bayonet, the optical bayonet comprising:

the lens barrel is provided with opposite ends;

the two transparent pieces are correspondingly and hermetically connected with the two opposite ends of the lens cone;

the lens component is arranged inside the cavity of the lens barrel in an adjustable mode along the axial position;

the first magnetic piece is positioned in the chamber and connected with the lens component so as to enable the first magnetic piece and the lens component to synchronously move in the chamber along the axial direction;

the pushing component is sleeved outside the lens barrel in an axially movable manner and comprises a second magnetic piece which is mutually magnetically matched with the first magnetic piece; and

the knob is rotatably sleeved and connected to the outside of the lens barrel, and can drive the pushing assembly to axially move when rotating.

In one embodiment, the inner wall of the knob and the outer wall of the lens barrel form a spacing space, and the pushing component is axially movably arranged in the spacing space;

the pushing assembly further comprises a movable piece, the second magnetic piece is connected with the movable piece, the movable piece is respectively connected with the inner wall of the knob and the outer wall of the lens cone, and the movable piece can be driven to axially move when the knob rotates.

In one embodiment, one of the knob and the lens barrel is provided with a first guide part arranged along the axial direction, and the other one is provided with a spiral second guide part; the movable piece is provided with a first movable part in sliding fit with the first guide part and a second movable part in sliding fit with the second guide part.

In one embodiment, the first guiding portion is a protrusion, a first chute axially arranged is arranged on the protrusion, and the first movable portion is movably arranged in the first chute; the second guide part is a first spiral groove, and the second guide part is movably arranged in the first spiral groove.

In one embodiment, when the first guiding part is arranged on the inner wall of the knob, a limiting part which is in limiting fit with the first guiding part along the circumferential direction is arranged on the outer wall of the lens barrel; or when the first guide part is arranged on the outer wall of the lens barrel, a limiting part which is in limit fit with the first guide part along the circumferential direction is arranged on the inner wall of the knob.

In one embodiment, the movable piece comprises a positioning pin and a mounting seat; the positioning pin penetrates through the mounting seat, and the opposite ends of the positioning pin are respectively provided with the first movable part and the second movable part; the second magnetic piece is connected with the movable piece through the mounting seat.

In one embodiment, the optical bayonet further comprises a bayonet seat, one end of the lens barrel is connected in the bayonet seat in a penetrating manner, a boss is circumferentially arranged on the outer wall of the other end of the lens barrel, the boss and the bayonet seat are arranged at intervals, one end of the knob is rotationally sleeved outside the boss, the other end of the knob is rotationally sleeved outside the bayonet seat, and the knob, the bayonet seat and the boss are enclosed to form the interval space; the optical bayonet further comprises a first sealing ring, a second sealing ring and a third sealing ring; the first sealing ring is arranged between the outer wall of the boss and the inner wall of one end of the knob, and the second sealing ring is arranged between the outer wall of the bayonet seat and the inner part of the other end of the knob; the third sealing ring is arranged on the side wall of the boss, which is away from the bayonet seat.

In one embodiment, the outer wall of the lens assembly is provided with a mounting groove, and the first magnetic piece is a magnetic ring and is correspondingly arranged in the mounting groove.

In one embodiment, the transparent member is glass; and/or, the two ends of the lens barrel are respectively provided with steps, and the transparent piece is correspondingly arranged on the steps; and/or the transparent piece is correspondingly arranged at the end part of the lens cone in an adhesive, welding, clamping or interference fit manner.

An endoscopic imaging system comprising said optical bayonet.

According to the endoscope camera system and the optical bayonet, on one hand, as the lens component is positioned in the cavity, the opposite ends of the lens barrel are respectively sealed by the transparent sealing piece, so that the cavity is completely sealed, the lens component is ensured to be in a sealed environment, the sealing effect on the lens component is good, the damage phenomenon can be avoided during pressure steam sterilization, and the service life of a product can be prolonged; on the other hand, when focusing is needed, through rotating the knob, the knob drives the pushing component to move along the axial direction when rotating, the pushing component drives the second magnetic part connected with the pushing component to move along the axial direction, the second magnetic part drives the first magnetic part to move along the axial direction synchronously through magnetic force, and the first magnetic part drives the lens component to move along the axial direction synchronously, so that focusing is realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an exploded view of an optical bayonet according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of an optical bayonet according to an embodiment of the present utility model;

fig. 3 is a schematic view of a view angle structure of a lens barrel according to an embodiment of the utility model;

fig. 4 is a schematic view of another view structure of a lens barrel according to an embodiment of the utility model;

fig. 5 is a schematic view of a knob according to an embodiment of the utility model.

10. A lens barrel; 11. a second guide part; 12. a limit part; 13. a boss; 14. a step; 20. a transparent member; 30. a lens assembly; 31. a mounting groove; 40. a first magnetic member; 50. a knob; 51. a spacing space; 52. a first guide part; 521. a first chute; 53. a main body portion; 60. a pushing assembly; 61. a second magnetic member; 62. a movable member; 621. a positioning pin; 622. a mounting base; 6221. a pin hole; 70. a bayonet mount; 81. a first seal ring; 82. a second seal ring; 83. a third seal ring; 91. a first protective cover; 92. and a second protective cover.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

It should be noted that, the axial direction in this embodiment refers to the direction in which the connecting line of the center points of the two ends of the lens barrel is located and the direction parallel to the connecting line, that is, the direction shown by the double arrow S in fig. 2 and the direction parallel to the double arrow S, for example.

Referring to fig. 1 and 2, fig. 1 is a schematic diagram illustrating an exploded structure of an optical bayonet according to an embodiment of the present utility model; fig. 2 shows a schematic cross-sectional view of an optical bayonet according to an embodiment of the present utility model. An embodiment of the present application provides an optical bayonet, the optical bayonet includes: the lens barrel 10, the two transparent members 20, the lens assembly 30, the first magnetic member 40, the knob 50, and the pushing assembly 60. The lens barrel 10 is provided with opposite ends. The two transparent members 20 are correspondingly and hermetically connected with the opposite ends of the lens barrel 10. The lens assembly 30 is disposed inside the chamber of the lens barrel 10 with adjustable axial position. The first magnetic member 40 is positioned within the chamber and is coupled to the lens assembly 30 so as to move axially within the chamber in synchronization with the lens assembly 30. The pushing assembly 60 is axially movably sleeved outside the lens barrel 10, and the pushing assembly 60 comprises a second magnetic piece 61 magnetically matched with the first magnetic piece 40. The knob 50 is rotatably sleeved outside the lens barrel 10, and the knob 50 can drive the pushing assembly 60 to move axially when rotating.

Alternatively, the inner wall of the knob 50 and the outer wall of the lens barrel 10 are formed with a space 51.

Specifically, the pushing assembly 60 is movably disposed in the spacing space 51 along the axial direction, and the pushing assembly 60 includes a second magnetic member 61 and a movable member 62. The second magnetic member 61 is connected to the movable member 62, and the second magnetic member 61 is magnetically engaged with the first magnetic member 40. The movable part 62 is respectively connected with the inner wall of the knob 50 and the outer wall of the lens barrel 10, and the knob 50 can drive the movable part 62 to move along the axial direction when rotating.

On the one hand, the optical bayonet is characterized in that the lens assembly 30 is positioned in the cavity, and the opposite ends of the lens barrel 10 are respectively sealed by the transparent piece 20, so that the cavity is completely sealed, the lens assembly 30 is ensured to be in a sealed environment, and the sealing effect on the lens assembly 30 is good, thus avoiding damage phenomenon during pressure steam sterilization and prolonging the service life of products; on the other hand, when focusing is needed, by rotating the knob 50, the knob 50 rotates to drive the movable member 62 to axially move, the movable member 62 drives the second magnetic member 61 connected with the movable member to axially move, the second magnetic member 61 drives the first magnetic member 40 to axially move synchronously through magnetic force, and the first magnetic member 40 synchronously drives the lens assembly 30 to axially move, so that focusing is achieved.

It should be noted that, the lens assembly 30 may be a single lens or a combination of multiple lenses, and the specific structural form thereof may be flexibly adjusted and set according to actual requirements, which is not limited herein. Focusing can be achieved when the lens assembly 30 is axially movable within the chamber.

Referring to fig. 2, 3 and 5, fig. 3 is a schematic view of a lens barrel 10 according to an embodiment of the utility model, and fig. 5 is a schematic view of a knob 50 according to an embodiment of the utility model. In one embodiment, one of the knob 50 and the barrel 10 is provided with a first guide 52 disposed along the axial direction, and the other is provided with a second guide 11 in a spiral shape. The movable member 62 is provided with a first movable portion slidably engaged with the first guide portion 52 and a second movable portion slidably engaged with the second guide portion 11. Thus, when knob 50 is rotated, moveable member 62 is caused to move axially.

Referring to fig. 2, 3 and 5, in one embodiment, the first guiding portion 52 is a protrusion, and a first sliding groove 521 disposed along an axial direction is disposed on the protrusion, and the first movable portion is movably disposed in the first sliding groove 521. The second guiding portion 11 is a first spiral groove, and the second guiding portion 11 is movably disposed in the first spiral groove.

Referring to fig. 2 to 5, fig. 4 is a schematic view illustrating another view structure of a lens barrel 10 according to an embodiment of the utility model. In one embodiment, when the first guiding portion 52 is disposed on the inner wall of the knob 50, the outer wall of the lens barrel 10 is provided with a limiting portion 12 that is in limit fit with the first guiding portion 52 along the circumferential direction. Alternatively, when the first guide portion 52 is disposed on the outer wall of the lens barrel 10, the inner wall of the knob 50 is provided with a limiting portion 12 that is in limit fit with the first guide portion 52 in the circumferential direction. In this way, the limiting portion 12 is in limiting fit with the first guiding portion 52 along the circumferential direction, so that the rotation angle range of the knob 50 is smaller than 360 °, and is set to 180 ° or other angles according to practical requirements. In other words, the knob 50 has a left-right limit position, and when the knob 50 is rotated to the limit position, the knob 50 abuts against the stopper 12, thereby preventing the knob 50 from continuing to rotate. Accordingly, the lens assembly 30 stops moving after moving axially to both extreme positions.

Alternatively, the limiting portion 12 is wound on the outer wall of the lens barrel 10 or the inner wall of the knob 50 in an arc shape, for example. When the arc length of the limiting part 12 is longer, the rotation angle range of the first guiding part 52 is smaller; conversely, the shorter the arc length of the limiting portion 12, the larger the rotation angle range of the first guiding portion 52.

Referring to fig. 3 to 5, in one embodiment, the first guide portion 52 is disposed on an inner wall of the knob 50 and extends from one end of the knob 50 to the other end of the knob 50. The limiting portion 12 is disposed on an outer wall of the lens barrel 10, and specifically disposed on the boss 13, for example.

Referring to fig. 1 and 2, in one embodiment, the movable member 62 includes a positioning pin 621 and a mounting seat 622. The positioning pin 621 is disposed in the mounting seat 622 in a penetrating manner, and two opposite ends of the positioning pin 621 are respectively a first movable portion and a second movable portion. The second magnetic member 61 is connected to the movable member 62 through the mounting base 622. Specifically, the mount 622 is provided with a pin hole 6221, and the positioning pin 621 is inserted into the pin hole 6221.

Alternatively, the second magnetic member 61 is fixedly attached to the mounting base 622, such as by clamping, bonding, welding, riveting, fastening using screws, bolts, pins, or the like. In addition, the second magnetic member 61 includes, but is not limited to, a magnetic ring, and is sleeved on the mounting seat 622.

Referring to fig. 1 and 2, in one embodiment, the optical bayonet further includes a bayonet base 70, one end of the lens barrel 10 is connected to the bayonet base 70 in a penetrating manner, and a boss 13 is circumferentially disposed on an outer wall of the other end of the lens barrel 10. The boss 13 and the bayonet seat 70 are arranged at intervals, one end of the knob 50 is rotationally sleeved outside the boss 13, the other end of the knob 50 is rotationally sleeved outside the bayonet seat 70, and the knob 50, the bayonet seat 70 and the boss 13 enclose to form an interval space 51.

Optionally, the knob 50 is provided with a main body portion 53, the main body portion 53 protruding into the spacing space 51. The two opposite end surfaces of the main body 53 are respectively provided with gaps with the bayonet seat 70 and the boss 13, so that smooth rotation of the knob 50 is ensured, and the main body 53 is limited to move along the axial direction.

Referring to fig. 1 and 2, in one embodiment, the optical bayonet further includes a first sealing ring 81, a second sealing ring 82, and a third sealing ring 83. The first seal ring 81 is disposed between the outer wall of the boss 13 and the inner wall of one end of the knob 50, and the second seal ring 82 is disposed between the outer wall of the bayonet mount 70 and the inner wall of the other end of the knob 50. The third sealing ring 83 is arranged on a side wall of the boss 13 facing away from the bayonet mount 70. Thus, the first sealing ring 81 can ensure tightness between one end of the knob 50 and the boss 13, the second sealing ring 82 can ensure tightness between the other end of the knob 50 and the bayonet seat 70, and the third sealing ring 83 can ensure tightness at the joint of the lens barrel 10 and the camera. The camera is, for example, a CCD, CMOS, or the like.

It should be noted that, the "boss 13" may be a part of the lens barrel 10, that is, the "boss 13" and the other part of the lens barrel 10 are integrally formed; or a separate component which is separable from the other part of the lens barrel 10, namely, the boss 13 can be independently manufactured and then combined with the other part of the lens barrel 10 into a whole.

In one embodiment, the outer wall of the lens assembly 30 is provided with a mounting groove 31, and the first magnetic member 40 is a magnetic ring and is correspondingly mounted in the mounting groove 31.

In one embodiment, transparent member 20 includes, but is not limited to, glass, such as a sapphire protective glass sheet.

In one embodiment, the two ends of the lens barrel 10 are respectively provided with the steps 14, and the transparent member 20 is correspondingly arranged on the steps 14, so that the lens barrel has the advantages of simple assembly, stability and reliability.

In one embodiment, the transparent member 20 is correspondingly mounted on the end of the lens barrel 10 by bonding, welding, clamping or interference fit, so that the sealing performance is good, and the lens barrel is stable and reliable.

In one embodiment, the optical bayonet further comprises a first protective cover 91 and a second protective cover 92. The first protection cover 91 is mounted at one end of the lens barrel 10 away from the bayonet mount 70. The second protection cover 92 is mounted at one end of the bayonet mount 70 away from the lens barrel 10. In this way, before the optical bayonet is connected to the camera and the eyepiece cover, the first protection cover 91 is mounted on the end of the lens barrel 10 to protect the end of the lens barrel 10, and the second protection cover 92 is mounted on the end of the bayonet mount 70 to protect the end of the bayonet mount 70. When the optical bayonet is required to be connected to the camera and the eyepiece cover, the first protective cover 91 and the second protective cover 92 are detached first, and then the assembly operation is performed.

In one embodiment, transparent member 20 is, for example, glass, specifically, sapphire, and the manner of attachment to the end of barrel 10 includes, but is not limited to, various manners of welding, bonding, clamping or interference fit insertion, and the like. The sealing mode of the lens barrel 10 and the sapphire can be welding or bonding by using pressure steam-resistant sterilized glue, and the feeding spiral groove can be arranged on the lens barrel 10 or the knob 50.

In one embodiment, the optical bayonet is assembled by integrally mounting the first magnetic member 40 into the cavity of the barrel 10 after being fixed to the lens assembly 30, for example, by bonding, and mounting the two transparent members 20 to opposite ends of the barrel 10; the second magnetic member 61 is fitted into the mount 622 and then onto the lens barrel 10, and the mount 622 and the lens barrel 10 are connected together with the positioning pin 621; the first sealing ring 81, the knob 50 and the second sealing ring 82 are sequentially installed on the lens barrel 10, the bayonet mount 70 is installed on the lens barrel 10 and screwed, and finally the camera sealing ring is installed on the lens barrel 10.

In addition, the sealing principle of the optical bayonet is as follows: one of the transparent members 20 is mounted to the lens barrel 10 through one of the positioning steps 14, the first magnetic member 40 is integrally incorporated into the lens barrel 10 after being fixed to the lens assembly 30, for example, by bonding, and then the other transparent member 20 is mounted to the lens barrel 10 through the other positioning step 14. Finally, the sealing of the optical bayonet is realized by welding or bonding.

In one embodiment, an endoscopic imaging system includes an optical bayonet of any of the implementations described above.

On the one hand, in the above endoscope photographing system, since the lens assembly 30 is located inside the cavity, the opposite ends of the lens barrel 10 are respectively sealed by the transparent member 20, so that the cavity is completely sealed, the lens assembly 30 is ensured to be in a sealed environment, and the sealing effect on the lens assembly 30 is good, so that the damage phenomenon can be avoided during the pressure steam sterilization, and the service life of the product can be prolonged; on the other hand, when focusing is needed, by rotating the knob 50, the knob 50 rotates to drive the movable member 62 to axially move, the movable member 62 drives the second magnetic member 61 connected with the movable member to axially move, the second magnetic member 61 drives the first magnetic member 40 to axially move synchronously through magnetic force, and the first magnetic member 40 synchronously drives the lens assembly 30 to axially move, so that focusing is achieved.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims (10)

1. An optical bayonet, comprising:

the lens barrel is provided with opposite ends;

the two transparent pieces are correspondingly and hermetically connected with the two opposite ends of the lens cone;

the lens component is arranged inside the cavity of the lens barrel in an adjustable mode along the axial position;

the first magnetic piece is positioned in the chamber and connected with the lens component so as to enable the first magnetic piece and the lens component to synchronously move in the chamber along the axial direction;

the pushing component is sleeved outside the lens barrel in an axially movable manner and comprises a second magnetic piece which is mutually magnetically matched with the first magnetic piece; the method comprises the steps of,

the knob is rotatably sleeved and connected to the outside of the lens barrel, and can drive the pushing assembly to axially move when rotating.

2. The optical bayonet according to claim 1, wherein a space is formed between the inner wall of the knob and the outer wall of the lens barrel, and the pushing assembly is axially movably arranged in the space;

the pushing assembly further comprises a movable piece, the second magnetic piece is connected with the movable piece, the movable piece is respectively connected with the inner wall of the knob and the outer wall of the lens cone, and the movable piece can be driven to axially move when the knob rotates.

3. The optical bayonet according to claim 2, wherein one of the knob and the lens barrel is provided with a first guide portion arranged along an axial direction, and the other is provided with a second guide portion in a spiral shape; the movable piece is provided with a first movable part in sliding fit with the first guide part and a second movable part in sliding fit with the second guide part.

4. An optical bayonet according to claim 3, wherein the first guiding portion is a protrusion, a first chute axially arranged is provided on the protrusion, and the first movable portion is movably arranged in the first chute; the second guide part is a first spiral groove, and the second guide part is movably arranged in the first spiral groove.

5. The optical bayonet according to claim 4, wherein when the first guiding portion is disposed on the inner wall of the knob, a limiting portion which is in limit fit with the first guiding portion along the circumferential direction is disposed on the outer wall of the lens barrel; or when the first guide part is arranged on the outer wall of the lens barrel, a limiting part which is in limit fit with the first guide part along the circumferential direction is arranged on the inner wall of the knob.

6. An optical bayonet according to claim 3, wherein the moveable member comprises a locating pin and a mount; the positioning pin penetrates through the mounting seat, and the opposite ends of the positioning pin are respectively provided with the first movable part and the second movable part; the second magnetic piece is connected with the movable piece through the mounting seat.

7. The optical bayonet according to claim 2, further comprising a bayonet base, wherein one end of the lens barrel is inserted into the bayonet base, a boss is circumferentially arranged on an outer wall of the other end of the lens barrel, the boss and the bayonet base are arranged at intervals, one end of the knob is rotationally sleeved outside the boss, the other end of the knob is rotationally sleeved outside the bayonet base, and the knob, the bayonet base and the boss enclose the interval space; the optical bayonet further comprises a first sealing ring, a second sealing ring and a third sealing ring; the first sealing ring is arranged between the outer wall of the boss and the inner wall of one end of the knob, and the second sealing ring is arranged between the outer wall of the bayonet seat and the inner part of the other end of the knob; the third sealing ring is arranged on the side wall of the boss, which is away from the bayonet seat.

8. The optical bayonet of claim 1, wherein said lens assembly has a mounting slot on an outer wall thereof, and said first magnetic member is a magnetic ring and is correspondingly mounted in said mounting slot.

9. The optical bayonet of claim 1, wherein said transparent member is glass; and/or, the two ends of the lens barrel are respectively provided with steps, and the transparent piece is correspondingly arranged on the steps; and/or the transparent piece is correspondingly arranged at the end part of the lens cone in an adhesive, welding, clamping or interference fit manner.

10. An endoscopic imaging system, characterized in that it comprises an optical bayonet according to any one of claims 1 to 9.

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