Zoom adjusting mechanism and endoscope
The variable focus adjustment mechanism in endoscopes uses a rotating rod to drive a sliding element and cam component, converting rotational motion into linear motion for lens focus adjustment, addressing the high cost issue by eliminating the need for electric motors and enhancing stability.
Patent Information
- Application Number
- CN202421827281.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The existing endoscopes are costly, some endoscopes lack zoom function, and some endoscopes need to be controlled by motors when adjusting the focal length, which increases the cost.
The rotary rod assembly is used to drive the sliding member to move, and the sliding member drives the cam assembly to rotate. The torsional motion of the cam assembly is converted into linear motion of the lens assembly through the torque transmission assembly, realizing the zoom adjustment of the lens and simplifying the mechanical structure.
The cost of the endoscope is reduced, the zoom adjustment process is simplified, and the zoom adjustment is achieved by screwing the rotary rod assembly, avoiding the use of the motor.
Smart Images
Figure CN223108138U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, and more specifically, to a zoom adjustment mechanism. In addition, the utility model also relates to an endoscope including the above zoom adjustment mechanism. Background Technique
[0002] An endoscope is a medical device that provides imaging examinations and treatments for the human digestive tract. During the examination process, in order to improve the doctor's diagnosis efficiency, it is necessary to observe the whole situation with a large field of view angle (wide-angle end). After finding a suspicious lesion, a high-resolution imaging lens (magnification end) is required to accurately locate and analyze the lesion. During this process, it is necessary to adjust the focal length of the endoscope.
[0003] Currently, due to the limited structural space inside the endoscope, some endoscopes do not have a zoom function. In addition, during the process of adjusting the focal length of some endoscopes, it is necessary to control the focusing process of the endoscope through a motor, and the cost of the motor is relatively high, increasing the cost of the endoscope.
[0004] In summary, how to provide a zoom adjustment mechanism that can reduce the cost of the endoscope is an urgent problem to be solved by those skilled in the art at present. Content of the Utility Model
[0005] In view of this, the purpose of the utility model is to provide a zoom adjustment mechanism, which drives a sliding member to move through a rotating rod assembly, drives a cam assembly to rotate through the sliding member, and converts the torsional motion transmitted by the cam assembly into a linear motion of a lens assembly through a torque transmission assembly to achieve zoom adjustment of the lens. The structure is simple and has good stability, and can effectively reduce the cost of the endoscope.
[0006] Another purpose of the utility model is to provide an endoscope including the above zoom adjustment mechanism.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] A zoom adjustment mechanism includes:
[0009] A rotating rod assembly,
[0010] A sliding member, the sliding member is connected to the rotating rod assembly, and the rotating rod assembly drives the sliding member to move linearly;
[0011] A cam assembly, the cam assembly is connected to the sliding member, and the linear motion of the sliding member drives the cam assembly to achieve axial rotation;
[0012] and a torque transmission component, one end of the torque transmission component is connected to the cam component, and the other end is connected to the lens component of the lens. The torque is transmitted through the torque transmission component to drive the movement of the lens component to achieve zoom adjustment.
[0013] Optionally, the cam component includes a camshaft that is rotatable about an axis. The camshaft cooperates with the sliding member and is driven by the sliding member to rotate about the axis. One end of the camshaft away from the rotating rod component is connected to the torque transmission component.
[0014] Optionally, one of the camshaft and the sliding member is provided with a groove and the other is provided with a protrusion. One of the protrusion and the groove is spiral. The protrusion and the groove cooperate so that when the sliding member moves linearly, it drives the camshaft to rotate about the axis.
[0015] Optionally, the zoom adjustment mechanism further includes a sliding seat. The sliding seat is provided with a sliding groove that cooperates with the sliding member along the axis of the camshaft. The camshaft is arranged in the sliding groove of the sliding seat.
[0016] Optionally, the cam component further includes a cam bracket. The cam bracket is arranged on the sliding seat. Axial ends of the camshaft are rotatably arranged on the cam bracket.
[0017] Optionally, axial shoulders are arranged at axial ends of the camshaft. The axial shoulders cooperate with the cam bracket to limit axial movement of the camshaft.
[0018] Optionally, the camshaft and the cam bracket are connected by bearing cooperation.
[0019] Optionally, the rotating rod component includes a knob and a connecting rod. One end of the connecting rod is rotatably connected to a non-rotating axis position of the knob, and the other end is connected to the sliding member.
[0020] Optionally, a lubricating coating is provided on the surface of the camshaft; and / or, the sliding member is made of brass H62 material.
[0021] An endoscope includes the zoom adjustment mechanism according to any one of the above.
[0022] During the process of using the zoom adjustment mechanism provided by the present utility model, only by screwing the rotating rod component, the sliding member can be driven to move linearly. During the linear movement of the sliding member, the cam component will be driven to rotate about the axis. The cam component transmits the rotational torque to the torque transmission component, and the torque transmission component converts the rotational movement transmitted by the cam component into a linear movement of the lens component, thereby realizing the zoom adjustment of the lens. During actual use, by changing the rotation direction of the rotating rod component, the rotation direction of the cam component can be changed, thereby realizing the reciprocating movement of the lens component and adjusting the focal length.
[0023] Compared with the prior art, in the zoom adjustment mechanism of the present utility model, there is no need to set up power structures such as motors, and the operation can be directly carried out by screwing the knob, which simplifies the mechanical structure of the zoom adjustment mechanism and reduces the cost of the zoom adjustment mechanism.
[0024] In addition, the present utility model also provides an endoscope including the above-mentioned zoom adjustment mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.
[0026] Figure 1 is a schematic structural diagram of a specific embodiment of the endoscope provided by the present utility model;
[0027] Figure 2 is a schematic structural diagram of a specific embodiment of the zoom adjustment mechanism provided by the present utility model;
[0028] Figure 3 is Figure 2 a schematic structural diagram of the zoom adjustment mechanism in removing the lens assembly;
[0029] Figure 4 is Figure 3 a schematic cross-sectional view of the zoom adjustment mechanism in;
[0030] Figure 5 is Figure 3 an exploded view of the zoom adjustment mechanism in;
[0031] Figure 6 is a schematic connection diagram of the torque transmission component and the lens assembly.
[0032] Figures 1-6 in:
[0033] 100 is the insertion part; 200 is the operation part; 210 is the rotating rod assembly, 2101 is the knob, 2102 is the lever; 220 is the sliding part, 2201 is the pin, 2202 is the first through hole; 230 is the cam assembly, 2301 is the camshaft, 2301a is the groove, 2301b is the end of the camshaft, 2302 is the cam bracket; 280 is the torque transmission assembly; 250 is the outer shell of the operation part; 260 is the slide base, 2601 is the slide base bracket, 2602 is the chute; 270 is the cam connecting part, 2701 is the anti-rotation pin; 240 is the torque spring; 290 is the lens assembly; 300 is the light guide part. Detailed implementation manners
[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0035] The core of the present invention is to provide a zoom adjustment mechanism, which drives the sliding part to move through the rotating rod assembly, drives the cam assembly to rotate through the sliding part, and converts the torsional motion transmitted by the cam assembly into a linear motion of the lens assembly through the torque transmission assembly to achieve the zoom adjustment of the lens. The structure is simple and has good stability, which can effectively reduce the cost of the endoscope.
[0036] Another core of the present invention is to provide an endoscope including the above zoom adjustment mechanism.
[0037] This specific embodiment discloses a zoom adjustment mechanism, including a rotating rod assembly 210, a sliding part 220, a cam assembly 230 and a torque transmission assembly 280. The sliding part 220 is connected to the rotating rod assembly 210, and the rotating rod assembly 210 drives the sliding part 220 to move linearly; the cam assembly 230 is connected to the sliding part 220, and the linear motion of the sliding part 220 drives the cam assembly 230 to achieve axial rotation; one end of the torque transmission assembly 280 is connected to the cam assembly 230, and the other end is connected to the lens assembly 290 of the lens. The torque is transmitted through the torque transmission assembly 280 to drive the movement of the lens assembly 290 to achieve zoom adjustment.
[0038] In the process of using the zoom adjustment mechanism provided by this specific embodiment, only by operating the rotary rod assembly 210 can the sliding member 220 be driven to move linearly. During the linear movement of the sliding member 220, the cam assembly 230 will be driven to rotate axially. The cam assembly 230 transmits the rotational torque to the torque transmission assembly 280, and the torque transmission assembly 280 converts the torsional movement transmitted by the cam assembly 230 into the linear movement of the lens assembly 290, thereby realizing the zoom adjustment of the lens.
[0039] Compared with the prior art, in the zoom adjustment mechanism of this specific embodiment, there is no need to set up power structures such as motors. It can be directly operated by screwing the rotary rod assembly 210, which simplifies the mechanical structure of the zoom adjustment mechanism and reduces the cost of the zoom adjustment mechanism.
[0040] In a specific embodiment, the cam assembly 230 includes a camshaft 2301 that is rotatable axially. The camshaft 2301 cooperates with the sliding member 220 and is driven by the sliding member 220 to rotate axially. One end of the camshaft 2301 away from the rotary rod assembly 210 is connected to the torque transmission assembly 280.
[0041] On the basis of the above embodiment, the axial direction of the camshaft 2301 can be set parallel to the moving direction of the sliding member 220. During actual use, the sliding member 220 drives the camshaft 2301 to rotate axially during its movement.
[0042] Specifically, a gear-rack structure can also be set to convert the linear movement of the sliding member 220 into the axial rotation of the camshaft 2301. Of course, the gear-rack can also be replaced by other structures that meet the requirements and can convert linear movement into rotation, which is determined according to the actual situation.
[0043] Of course, the moving direction of the sliding member 220 can also not be parallel to the axial direction of the camshaft 2301, which is determined according to the actual situation.
[0044] Compared with the case where the moving direction of the sliding member 220 is not parallel to the axial direction of the camshaft 2301, setting the axial direction of the camshaft 2301 parallel to the moving direction of the sliding member 220 can make the camshaft 2301 and the sliding member 220 extend as much as possible axially, avoiding the space occupation of the sliding member 220 and the camshaft 2301 in other directions, and being more suitable for the structure of the endoscope.
[0045] In a specific embodiment, one of the camshaft 2301 and the sliding member 220 is provided with a groove 2301a and the other is provided with a protrusion. One of the protrusion and the groove (2301a) is spiral-shaped, and the protrusion cooperates with the groove 2301a so that the sliding member 220 drives the camshaft 2301 to rotate axially when moving linearly.
[0046] Specifically, the sliding member 220 includes a slider. When a spiral groove 2301a is provided on the outer peripheral side of the camshaft 2301, a protrusion is provided on the slider and is adapted to cooperate with the groove 2301a. The protrusion can be inserted into the groove 2301a and slide along the groove 2301a. Among them, since the spiral groove 2301a extends both axially and circumferentially, when the screw rod assembly 210 drives the slider to move linearly, the protrusion will generate a radial force on the side wall of the groove 2301a during the sliding process along the groove 2301a, thereby driving the camshaft 2301 to rotate about its axis. Alternatively, a through hole adapted to cooperate with the camshaft 2301 is machined axially on the slider, and a spiral groove 2301a is provided on the inner side wall of the through hole of the slider. The camshaft 2301 is installed in the through hole of the slider, and a protrusion is provided on the camshaft 2301. The protrusion can be inserted into the groove 2301a and slide along the groove 2301a. Since the spiral groove 2301a extends both axially and circumferentially, when the screw rod assembly 210 drives the slider to move linearly, the linear movement of the slider will cause the protrusion inserted in the groove 2301a to slide along the groove 2301a, thereby realizing the rotation of the camshaft 2301.
[0047] Further, the protrusion can specifically be a pin 2201. When the camshaft 2301 is provided with a spiral groove 2301a, the slider is provided with a second through hole for cooperating with the pin 2201. The pin 2201 is threadedly connected or adhesively connected to the slider through the second through hole. The part of the pin 2201 extending out of the second through hole extends into the groove 2301a and can slide along the groove 2301a. Alternatively, when the slider is provided with a spiral groove 2301a, the camshaft 2301 is provided with a second through hole for cooperating with the pin 2201. The pin 2201 is threadedly connected or adhesively connected to the camshaft 2301 through the second through hole. The part of the pin 2201 extending out of the second through hole extends into the groove 2301a and can slide along the groove 2301a.
[0048] In some other embodiments, the protrusion can be spiral. For example, when a spiral protrusion is provided on the outer peripheral side of the camshaft 2301, the slider is provided with a first insertion hole for cooperating with the protrusion. The protrusion is slidably disposed in the first insertion hole relative to the slider. When the screw rod assembly 210 is rotated to drive the slider to move linearly, the first insertion hole moves relative to the protrusion. Since the protrusion extends both axially and circumferentially, the camshaft 2301 will be driven to rotate about its axis.
[0049] In a specific embodiment, the zoom adjustment mechanism also includes a slide 260, and the slide 260 is provided with a slide groove cooperating with the sliding member 220 along the axial direction of the cam shaft 2301. The cam shaft 2301 is arranged in the slide groove of the slide 260. Such a setting can ensure that the sliding member 220 only moves along the axial direction of the cam shaft 2301, thereby limiting the sliding member 220 from swinging in a direction perpendicular to the axial direction of the cam shaft 2301, thereby reducing friction and collision.
[0050] In a specific embodiment, the cam assembly 230 further includes a cam bracket 2302, which is disposed on the slide 260, and the axial ends of the cam shaft 2301 are rotatably disposed on the cam bracket 2302. Figure 4 , 5 As shown, the camshaft ends 2301b at both ends of the camshaft 2301 are rotatably disposed on the cam brackets 2302 at both ends of the slide 260 , and the torque transmission assembly 280 is installed on the camshaft end 2301b at one end away from the rotating rod assembly 210 .
[0051] Furthermore, in order to reduce the friction during the rotation of the camshaft 2301, the camshaft end 2301b and the cam bracket 2302 can be clearance-matched, or the cam bracket 2302 can be provided with a rotating bearing, and the camshaft end 2301b is matched with the rotating bearing; the radial dimension of the camshaft end 2301b is smaller than the radial dimension of the camshaft 2301, and the gap does not need to be too large, and it is only necessary to ensure that the camshaft 2301 can rotate relative to the cam bracket 2302. With this arrangement, the cam bracket 2302 can limit the radial movement of the camshaft 2301.
[0052] In a specific embodiment, in order to limit the axial movement of the camshaft end 2301b, shaft shoulders may be provided at both ends of the camshaft end 2301b, and the axial movement of the camshaft 2301 may be limited by the cooperation between the shaft shoulders and the cam bracket 2302.
[0053] In a specific embodiment, in order to limit the axial displacement of the cam bracket 2302, mounting grooves are formed at both ends of the slide seat 260, and the cam bracket 2302 is fixed in the mounting grooves to prevent the cam bracket 2302 from moving in the axial direction.
[0054] On the basis of the above embodiment, the sliding member 220 is provided with a first through hole 2202 along the axial direction of the camshaft 20301 , the camshaft 2301 is installed in the first through hole 2202 , and the camshaft 2301 and the sliding member 220 are clearance-matched at the first through hole 2202 .
[0055] like Figure 5As shown, the first through hole 2202 of the sliding member 220 can accommodate the camshaft 2301, and the shape and size of the first through hole 2202 match those of the camshaft 2301. During the rotation of the camshaft 2301, friction between the camshaft 2301 and the inner wall of the first through hole 2202 of the sliding member 220 can be avoided.
[0056] Further, a chute 2602 is provided in the slide base 260, and the sliding member 220 moves linearly along the chute 2602. During the specific assembly process, the cam bracket 2302 can be fixed in the chute 2602, the camshaft 2301 is rotatably arranged on the cam bracket 2302, the sliding member 220 is buckled on the upper part of the camshaft 2301, and the sliding member 220 is slidably arranged along the chute 2602.
[0057] In a specific embodiment, the zoom adjustment mechanism further includes an operation part housing 250, and the slide base 260 is fixed in the operation part housing 250.
[0058] Specifically, a slide base bracket 2601 is fixed in the operation part housing 250, the slide base 260 is installed on the slide base bracket 2601, and the sliding member 220 is arranged in the slide base 260 and can move linearly in the slide base 260.
[0059] In a specific embodiment, as Figure 3 shown, the rotating rod assembly 210 includes a knob 2101 rotatably arranged in the operation part housing 250, and at least part of the knob 2101 is located outside the operation part housing 250; the cam assembly 230, the sliding member 220 and the slide base 260 are arranged in the operation part housing 250.
[0060] Specifically, the knob 2101 can be rotatably connected to any suitable position of the operation part 200 that is convenient for the staff to control by setting a sleeve or other connecting parts on the operation part housing 250. During actual use, setting the knob 2101 on the operation part housing that is convenient for the operator to operate is more convenient and has stronger operability.
[0061] In a specific embodiment, the rotating rod assembly 210 further includes a lever 2102. One end of the lever 2102 is rotatably connected to a non-rotating axis position of the knob 2101, and the other end is rotatably connected to the sliding member 220. During the process of rotating the knob 2101, the knob 2101 drives the lever 2102 to move, and the lever 2102 drives the sliding member 220 to move linearly in the chute 2602. During actual use, by changing the screwing direction of the knob 2101, the rotation direction of the camshaft 2301 can be changed. The camshaft 2301 transmits the rotational torque to the torque transmission assembly 280, and the torque transmission assembly 280 converts the torsional motion transmitted by the cam assembly 230 into the linear motion of the lens assembly 290. Furthermore, the lens assembly 290 can be driven to reciprocate by changing the rotation direction of the camshaft 2301, realizing zoom adjustment.
[0062] Specifically, the lever 2102 can be extended along the moving direction of the sliding member 220, so that the lever 2102 is arranged as far as possible along the moving direction of the sliding member 220, avoiding occupying space in other directions.
[0063] In a specific embodiment, in combination with Figure 2 、 Figure 3 As shown, the zoom adjustment mechanism further includes a cam connecting member 270 and a protective tube sleeved on the outer periphery of the torque transmission assembly 280. The torque transmission assembly 280 can be a torque spring 240 or a tension steel wire rope, etc. One end of the cam connecting member 270 is fixedly connected to the camshaft 2301, and the other end is fixedly connected to one end of the torque spring 240. The other end of the torque spring 240 is connected to the lens assembly 290. By arranging a protective tube on the outer periphery of the torque spring 240, isolation from other structures is achieved and a protective effect is exerted.
[0064] Specifically, the camshaft 2301 and the cam connecting member 270 are fixedly connected by a non-rotating pin 2701 to prevent the camshaft 2301 from rotating relative to the cam connecting member 270. An installation hole can be provided at one end of the cam connecting member 270 facing the camshaft 2301, and the camshaft end 2301b is inserted into the installation hole. The non-rotating pin 2701 passes through the side wall of the installation hole and abuts against the camshaft end 2301b. The torque spring 240 is fixedly connected to the cam connecting member 270 to ensure that the torque spring 240 and the cam connecting member 270 can rotate synchronously.
[0065] In combination with Figure 4 、 Figure 5As shown, one end of the cam connecting member 270 is axially provided with a second insertion hole, and the side wall of the second insertion hole is provided with a notch extending axially. One end of the torsion spring 240 is inserted into the second insertion hole and is in interference fit with the second insertion hole, so that the relative position of the torsion spring 240 and the cam connecting member 270 in the axial direction is fixed; to achieve circumferential fixation, in one way, a through hole extending in the diameter direction is opened on the side wall of the torsion spring 240, and the part of the long pin cooperating with the through hole that extends out of the torsion spring 240 is clamped in the notch of the second insertion hole; in another way, a first tightening screw hole is provided on the side wall of the torsion spring 240, and a first tightening bolt is threadedly connected to the first tightening screw hole and tightened against the torsion spring 240; the part of the first tightening bolt that extends out of the first tightening screw hole is clamped in the notch of the second insertion hole. The other end of the cam connecting member 270 is provided with a third insertion hole. The camshaft end 2301b of the camshaft 2301 facing the cam connecting member 270 is axially extended with a plug-in part, and a positioning plane is provided on the outer peripheral side of the plug-in part. The shape and size of the third insertion hole match the plug-in part; the cam connecting member 270 is provided with a second tightening screw hole, and a second tightening bolt passes through the second tightening screw hole and presses against the positioning plane to limit the rotation of the plug-in part relative to the cam connecting member 270; the axial limit of the plug-in part relative to the cam connecting member 270 can be achieved by pressing with the second tightening bolt or by other limiting structures, which is specifically determined according to the actual situation.
[0066] Of course, it can also be that a second through hole is provided at the bottom end of the second insertion hole, one end of the torque transmission assembly 280 passes through the second insertion hole and is in interference fit with the second through hole, and an installation hole for installing a pin is provided on the circumferential surface of the third insertion hole at the other end of the cam connecting member 270, and the camshaft end 2301b away from the lever assembly 210 is fixedly connected to the cam connecting member 270 through a pin.
[0067] In addition, to accurately convert the linear movement amount of the slider into a corresponding rotation amount, it is necessary to reduce the friction between the slider and the camshaft 2301; to improve the service life, it is necessary to improve the strength and wear resistance of the slider and the camshaft 2301. Specifically, a lubricating coating can be deposited on the surface of the camshaft 2301 by physical vapor deposition coating process (PVD); and / or, the sliding member 220 is a component made of brass H62 material to increase the surface hardness, wear resistance of the camshaft 2301 and the sliding member 220 and reduce the friction.
[0068] Such as Figure 1As shown, in addition to the above zoom adjustment mechanism, the present utility model further provides an endoscope including an insertion portion 100 and an operation portion 200. The knob 2101 is fixed on the operation portion housing 250 of the operation portion 200 through a sleeve. The torque transmission assembly 280 extends through the insertion portion 100 to the lens assembly 290 at the head end. The operator adjusts the focal length of the camera located at the distal end by rotating the knob on the operation portion 200.
[0069] Specifically, the endoscope further includes a light guide portion 300. The light guide portion 300 is connected to a light source and is used to provide illumination light to the head end of the insertion portion. For the structures of other parts of the endoscope, please refer to the prior art and will not be elaborated herein.
[0070] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. Any combination of all the embodiments provided by the present utility model falls within the protection scope of this utility model and will not be elaborated herein.
[0071] The above has introduced in detail the zoom adjustment mechanism and the endoscope provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.
Claims
1. A zoom adjustment mechanism, characterized in that, Comprising: A rotating rod assembly (210), A sliding member (220), the sliding member (220) is connected to the rotating rod assembly (210), and the rotating rod assembly (210) drives the sliding member (220) to move linearly; A cam assembly (230), the cam assembly (230) is connected to the sliding member (220), and the linear movement of the sliding member (220) drives the cam assembly (230) to achieve axial rotation; And a torque transmission assembly (280), one end of the torque transmission assembly (280) is connected to the cam assembly (230), and the other end is connected to the lens assembly (290) of the lens. The torque is transmitted through the torque transmission assembly (280) to drive the movement of the lens assembly (290) to achieve zoom adjustment.
2. The zoom adjustment mechanism according to claim 1, wherein The cam assembly (230) includes a camshaft (2301) that is rotatable about the axis. The camshaft (2301) cooperates with the sliding member (220) and is driven by the sliding member (220) to rotate about the axis. The end of the camshaft (2301) away from the rotating rod assembly (210) is connected to the torque transmission assembly (280).
3. The zoom adjustment mechanism according to claim 2, characterized in that, One of the camshaft (2301) and the sliding member (220) is provided with a groove (2301a), and the other is provided with a protrusion. One of the protrusion and the groove (2301a) is spiral. The protrusion and the groove (2301a) cooperate so that when the sliding member (220) moves linearly, it drives the camshaft (2301) to rotate about the axis.
4. The zoom adjustment mechanism according to claim 3, wherein The zoom adjustment mechanism further includes a sliding seat (260). The sliding seat (260) is provided with a chute that cooperates with the sliding member (220) along the axis of the camshaft (2301). The camshaft (2301) is disposed in the chute of the sliding seat (260).
5. The zoom adjustment mechanism according to claim 4, characterized in that, The cam assembly (230) further includes a cam bracket (2302). The cam bracket (2302) is disposed on the sliding seat (260). The two axial ends of the camshaft (2301) are rotatably disposed on the cam bracket (2302).
6. The zoom adjustment mechanism according to claim 5, characterized in that, Axial shoulders are provided at both axial ends of the camshaft (2301). The axial shoulders cooperate with the cam bracket (2302) to limit the axial movement of the camshaft (2301).
7. The zoom adjustment mechanism according to claim 5, characterized in that, The camshaft (2301) and the cam bracket (2302) are connected by bearing cooperation.
8. The zoom adjustment mechanism according to any one of claims 1-7, characterized in that, The rotating rod assembly (210) includes a knob (2101) and a connecting rod (2102). One end of the connecting rod (2102) is rotatably connected to a non-rotating axis position of the knob (2101), and the other end is connected to the sliding member (220).
9. The zoom adjustment mechanism according to any one of claims 2-7, characterized in that, A lubricating coating is provided on the surface of the camshaft (2301); and / or, the sliding member (220) is made of brass H62 material.
10. An endoscope, characterized in that, Including the zoom adjustment mechanism according to any one of claims 1-9.