Focusing protection device and endoscope

Abstract

The embodiment of the utility model provides a kind of focusing protection device and endoscope.The focusing protection device includes: dial rod connecting piece, it is used to connect to focusing dial rod;Wire connecting piece, it is used to connect to wire, to connect to head end lens;Focusing protection component is connected between the distal end of dial rod connecting piece and the proximal end of wire connecting piece, dial rod connecting piece is used to accept the force of focusing dial rod, to drive head end lens to move, the distal end of dial rod connecting piece is movable relative to focusing protection component along force direction, dial rod connecting piece is less than or equal to predetermined force when being subjected to force along force direction, and it is synchronous with focusing protection component to move;Dial rod connecting piece is moved back to focusing protection component when being subjected to tensile force along force direction greater than predetermined force.When tensile force is greater than predetermined force, dial rod connecting piece can move back to focusing protection component, so that part tensile force can be offset, reduce the tensile force that wire bears, and then wire can be prevented from stretching and lengthening.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a focusing protection device and an endoscope having the same. Background Technology

[0002] An endoscope is a medical device used for imaging examinations and treatments. Endoscopes can be inserted into the object being observed (e.g., the digestive tract) through natural openings or small surgical incisions, allowing clinicians to probe and diagnose, thus greatly improving clinical outcomes. Therefore, endoscopes are increasingly used in clinical practice.

[0003] During surgery, endoscopic images must be sufficiently clear for clinicians to observe and assess lesions; therefore, the position of the endoscope tip must be precise. To improve image clarity, existing technology has developed endoscopes with focusing capabilities based on conventional endoscopes. Specifically, while keeping the operating and light guide sections essentially unchanged, an adjustable focusing function is added to the endoscope tip, enabling detailed observation of even minute lesion structures. The endoscope typically uses a focusing lever on the operating section to move the telescope, which in turn moves the endoscope tip, thus achieving focusing and improving image clarity to meet surgical requirements.

[0004] However, with frequent focusing during prolonged use of the endoscope, the telescope is subjected to constant tension. When this tension is excessive, the telescope stretches and becomes longer. This causes the lens tip to fail to move to the intended position when the focusing lever is rotated at a certain angle, resulting in an error in the lens tip's position. Consequently, the images captured by the endoscope are of poor clarity, failing to meet the needs of surgery and leading to poor clinical diagnostic and treatment outcomes. Utility Model Content

[0005] To at least partially address the problems existing in the prior art, according to one aspect of the present invention, a focusing protection device is provided. The focusing protection device includes: a lever connector, the proximal end of which is connected to a focusing lever on an operating part; a wire-drawing connector, the distal end of which is connected to a wire for connection to a head-end lens on an insertion part; and a focusing protection assembly connected between the distal end of the lever connector and the proximal end of the wire-drawing connector. The lever connector is used to receive force applied by the focusing lever to drive the head-end lens to move sequentially through the focusing protection assembly, the wire-drawing connector, and the wire. The distal end of the lever connector is movable relative to the focusing protection assembly in the direction of force application. When the force applied to the lever connector is less than or equal to a predetermined force, the lever connector moves synchronously with the focusing protection assembly in the direction of force application. When the pulling force applied to the lever connector is greater than the predetermined force, the lever connector moves away from the focusing protection assembly in the direction of force application.

[0006] For example, the distal end of the lever connector is inserted into the focusing protection assembly. The predetermined force includes the maximum static friction force between the distal end of the lever connector and the focusing protection assembly. When the lever connector is subjected to a tensile force in the direction of the applied force that is greater than the maximum static friction force, it moves away from the focusing protection assembly in the direction of the applied force. When the lever connector is subjected to a thrust force in the direction of the applied force that is greater than the maximum static friction force, it moves toward the focusing protection assembly in the direction of the applied force.

[0007] For example, the focusing protection assembly includes a first fixing member and a friction member made of an elastic material connected to the first fixing member, the distal end of the lever connector being inserted into the friction member, and the proximal end of the wire drawing connector being connected to the first fixing member.

[0008] For example, the first fastener includes an elastic fastener made of an elastic material, and the focusing protection assembly also includes an adjusting member connected to the elastic fastener, the adjusting member being used to press the friction member through the elastic fastener to adjust the maximum static friction force.

[0009] For example, an adjusting member is fitted onto an elastic fixing member. The adjusting member includes a cylindrical sleeve and a tapered sleeve tapering from the cylindrical sleeve. The cylindrical sleeve is threaded to the elastic fixing member, and the tapered sleeve is fitted at least partially onto the outer periphery of the friction member.

[0010] For example, the focusing protection assembly also includes a friction ring clamped between a tapered sleeve and an elastic retainer, the friction ring having greater wear resistance than the elastic retainer.

[0011] For example, the friction element includes a friction sleeve, and the distal end of the lever connector is inserted into the friction sleeve.

[0012] For example, the friction element includes a sealing ring, and the distal end of the lever connector is inserted into the sealing ring.

[0013] For example, the sealing rings include a plurality of rings spaced apart along the direction of force application.

[0014] For example, the focusing protection assembly is provided with a mounting hole that extends through the direction of force application, and the distal end of the lever connector and the proximal end of the wire drawing connector are respectively inserted into the two ends of the mounting hole.

[0015] For example, the focusing protection assembly includes a second fixing member and an elastic deformation member. The proximal end of the wire drawing connector is connected to the second fixing member, and the elastic deformation member is connected between the distal end of the lever connector and the second fixing member. When the lever connector is subjected to a force in the direction of force application that is less than or equal to a predetermined force, the elastic deformation member remains in its original state. When the lever connector is subjected to a tensile force in the direction of force application that is greater than the predetermined force, the elastic deformation member is stretched in the direction of force application.

[0016] For example, the elastic deformable element includes a spring.

[0017] For example, the distal end of the lever connector is provided with a first positioning hole, the second fixing member is provided with a second positioning hole, and the two ends of the elastic deformation member are respectively inserted into the first positioning hole and the second positioning hole.

[0018] For example, the distal end of the lever connector is provided with a third positioning hole, and the second fixing member is inserted into the third positioning hole.

[0019] For example, the proximal end of the wire drawing connector is detachably connected to the focusing protection assembly.

[0020] For example, the focusing protection device also includes a slide and a slider slidably connected to the slide, the slider being used to connect between the proximal end of the lever connector and the focusing lever.

[0021] For example, the focusing protection device also includes a base and a guide ring disposed on the base, through which the wire drawing connector passes.

[0022] According to another aspect of the present invention, an endoscope is also provided. The endoscope includes an operating part, a wire, an insertion part, and a focusing protection device as described above. The proximal end of the lever connector is connected to a focusing lever on the operating part, and the wire is connected between the distal end of the wire connector and the head lens on the insertion part.

[0023] The focusing protection device provided in this embodiment allows the lever connector and focusing protection assembly to move synchronously when the pulling and pushing forces are less than or equal to a predetermined force. Thus, by rotating the focusing lever, the lens at the head end can be driven to move within the focusing stroke, thereby achieving the focusing purpose. When the pulling force exceeds the predetermined force, the lever connector can move away from the focusing protection assembly, thereby offsetting part of the pulling force, reducing the pulling force on the wire, and preventing the wire from stretching and extending its service life. Based on this, by setting up the focusing protection device, the focusing lever can precisely control the position of the lens at the head end, thereby achieving precise focusing, ensuring the clarity of the captured image, and meeting surgical requirements.

[0024] This utility model description introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0025] The advantages and features of this utility model will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0026] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the drawings,

[0027] Figure 1 This is a schematic diagram of an endoscope according to an exemplary embodiment of the present invention;

[0028] Figure 2 This is a perspective view of the internal structure of an endoscope according to an exemplary embodiment of the present invention;

[0029] Figure 3 for Figure 2 An exploded view of the internal structure of an endoscope is shown in the image.

[0030] Figure 4 for Figure 2 The image shows a cross-sectional view of the internal structure of an endoscope;

[0031] Figure 5 for Figure 4 A magnified view of the internal structure of an endoscope is shown in the image.

[0032] Figure 6 This is a partial enlarged view of the internal structure of an endoscope according to another exemplary embodiment of the present invention;

[0033] Figure 7 A perspective view of the internal structure of an endoscope according to another exemplary embodiment of the present invention;

[0034] Figure 8 for Figure 7 An exploded view of the internal structure of an endoscope is shown in the image.

[0035] Figure 9 for Figure 7 A cross-sectional view of the internal structure of an endoscope is shown in the image; and

[0036] Figure 10 for Figure 9 The image shows a magnified view of the internal structure of an endoscope.

[0037] The above figures include the following reference numerals:

[0038] 100. Focusing protection device; 200. Lever connector; 210. First positioning hole; 220. Third positioning hole; 300. Wire drawing connector; 310. Slot; 400. Focusing protection assembly; 401. Mounting hole; 402. Threaded hole; 410. First fixing member; 411. Embedded hole; 420. Friction member; 421. Friction sleeve; 422. Sealing ring; 423. Sleeve part; 424. Annular retaining ring; 430. Adjustment Components; 431, cylindrical sleeve; 432, conical sleeve; 440, friction ring; 450, second fixing component; 451, second positioning hole; 460, elastic deformation component; 470, screw; 510, slide block; 520, slider; 530, base; 540, guide ring; 600, operating part; 610, focusing lever; 700, insertion part; 710, head lens; 810, wire drawing; 820, insertion tube; 830, light guide part. Detailed Implementation

[0039] In the following description, numerous details are provided to enable a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, which may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well-known in the art have not been described in detail.

[0040] According to one aspect of the present invention, a focusing protection device is provided. This device protects the wire from excessive tension, preventing the excessive tension from being transmitted to the wire and thus preventing the wire from stretching due to excessive tension. The focusing protection device can be applied to any suitable device, including but not limited to endoscopes. Therefore, according to another aspect of the present invention, an endoscope is also provided. The focusing protection device and endoscope of embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] like Figure 1-5 As shown, the focusing protection device 100 may include a lever connector 200, a wire drawing connector 300, and a focusing protection assembly 400.

[0042] The proximal end (i.e., the end facing direction A) of the lever connector 200 can be connected to the focusing lever 610 on the operating unit 600 by any suitable method, such as welding. The proximal end of the lever connector 200 and the focusing lever 610 can be connected directly or through other components (such as the slider 520 described below). The proximal end is typically the end further away from the relevant tissue of the observed object. The distal end (i.e., the end facing direction B) is closer to the relevant tissue. The lever connector 200 includes, but is not limited to, the shaft structure shown in the figure, and may also be a sheet-like structure.

[0043] The distal end of the wire-drawing connector 300 can be connected to the wire-drawing element 810 by any suitable method, such as welding. Thus, the distal end of the wire-drawing connector 300 can be connected to the head lens 710 on the insertion part 700 via the wire-drawing element 810. In other words, the wire-drawing element 810 can be connected between the distal end of the wire-drawing connector 300 and the head lens 710 on the insertion part 700. The wire-drawing element includes, but is not limited to, steel wire rope.

[0044] The focusing protection assembly 400 can be connected between the distal end of the lever connector 200 and the proximal end of the wire drawing connector 300. The lever connector 200 can be used to receive the force applied by the focusing lever 610 to drive the head lens 710 to move sequentially through the focusing protection assembly 400, the wire drawing connector 300, and the wire drawing 810. The distal end of the lever connector 200 is movable relative to the focusing protection assembly 400 in the direction of force application (i.e., direction AB in the figure).

[0045] Therefore, in embodiments where the focusing protection device 100 is applied to an endoscope, the endoscope may further include an operating section 600, a wire puller 810, and an insertion section 700. In addition to the focusing lever 610, the operating section 600 may also include other functional knobs, water / air valve buttons, and suction valve buttons. Exemplarily, the focusing protection device 100 may also be located on the operating section 600. The endoscope may also include a light guide section 830. The light guide section 830 can be used to transmit illumination light to the insertion section 700, thereby providing illumination to the headpiece lens 710. An insertion tube 820 may be provided between the operating section 600 and the insertion section 700. The insertion tube 820 may be flexible, requiring bending during use, so that the insertion section 700 can be inserted into the body of the object being observed along the channel. The wire puller 810 can pass through the insertion tube 820. To allow the wire drawing 810 to bend in conjunction with the insertion tube 820, the wire drawing 810 needs to have a certain margin, allowing the head lens 710 to move to any position within its focusing stroke. Specifically, the movable stroke of the wire drawing 810 is greater than the focusing stroke of the head lens 710. This leads to a problem: when the head lens 710 moves to the near end of its focusing stroke, it cannot move further near, even though the focusing lever 610 can still be rotated. Thus, the wire drawing 810 will be subjected to a tension exceeding a predetermined force. With frequent use, the wire drawing 810 will stretch and lengthen due to the constant tension exceeding the predetermined force, causing the focusing lever 610 to be unable to accurately control the position of the head lens 710. The predetermined force can be the critical force at which the wire drawing 810 stretches and lengthens. That is, the wire drawing 810 may stretch and lengthen only when the tension exceeds the predetermined force. The predetermined force can also vary when different wire drawing 810s are used. Those skilled in the art can set the predetermined force according to the structure of the wire drawing 810. In any case, the predetermined force is usually set in advance during the production or installation of the endoscope, and is known to the focusing protection device 100.

[0046] Based on this, the focusing protection assembly 400 can effectively solve the above problems. Specifically, when the lever connector 200 is subjected to a force (including tension and thrust) less than or equal to a predetermined force along the direction of force application, the lever connector 200 and the focusing protection assembly 400 can move synchronously along the direction of force application. It should be noted that the force towards direction A can be a tension force, and the force towards direction B can be a thrust force. In practical applications, when a clinician needs to adjust the focus, the focusing protection device 100 can rotate the focusing lever 610. Specifically, the focusing lever 610 can be rotated in the first direction (e.g., clockwise), and the focusing lever 610 can apply a tension force (i.e., a force towards direction A) to the lever connector 200, thereby driving the head lens 710 to move towards the proximal end sequentially through the focusing protection assembly 400, the wire-drawing connector 300, and the wire-drawing 810. Conversely, the focusing lever 610 can be rotated in a second direction (e.g., counterclockwise). The focusing lever 610 can apply a pushing force (i.e., a force towards direction B) to the lever connector 200, thereby driving the head lens 710 to move towards the far end sequentially through the focusing protection assembly 400, the wire-drawing connector 300, and the wire-drawing 810. In this way, the head lens 710 can move within the focusing stroke, thus achieving focusing. When the lever connector 200 is subjected to a pulling force greater than a predetermined force in the direction of the applied force, the lever connector 200 can move away from the focusing protection assembly 400 in the direction of the applied force (i.e., move towards direction A). That is, when the head lens 710 moves to the near end of the focusing stroke, the head lens 710 can no longer move towards the near end. If the focusing lever 610 is rotated further, the pulling force will exceed the predetermined force. At this time, the pulling force exceeding the predetermined force will drive the lever connector 200 to move towards direction A. In this way, the focusing protection component 400 can prevent the wire drawing 810 from being subjected to a pulling force greater than the predetermined force.

[0047] In summary, the focusing protection device 100 provided in this embodiment allows the lever connector 200 and the focusing protection assembly 400 to move synchronously when the pulling force and pushing force are less than or equal to a predetermined force. Thus, by rotating the focusing lever 610, the head lens 710 can be driven to move within the focusing stroke, thereby achieving the purpose of focusing. When the pulling force is greater than the predetermined force, the lever connector 200 can move away from the focusing protection assembly 400, thereby offsetting part of the pulling force, reducing the pulling force borne by the wire 810, and preventing the wire 810 from stretching and extending its service life. Based on this, by setting the focusing protection device 100, the focusing lever 610 can precisely control the position of the head lens 710, thereby achieving precise focusing, ensuring the clarity of the captured image, and meeting surgical requirements.

[0048] The focusing protection assembly 400 can have various structures. Exemplarily, the focusing protection assembly 400 may include a force detector and a clutch. The force detector can detect the magnitude of the force acting on the lever connector 200. When the force detector detects that the force acting on the lever connector 200 is less than or equal to a predetermined force, the lever connector 200 can engage with the clutch, thereby allowing synchronous movement. When the force detector detects that the tension acting on the lever connector 200 is greater than the predetermined force, the force detector can control the clutch to disengage from the lever connector 200, thereby allowing the lever connector 200 to move away from the focusing protection assembly 400. Exemplarily, the focusing protection assembly 400 may include a scissor link assembly. When the force acting on the lever connector 200 is less than or equal to a predetermined force, the scissor link assembly will not be stretched, thereby allowing synchronous movement with the lever connector 200. When the tension on the lever connector 200 is greater than the predetermined force, the scissor link assembly can be stretched, thereby allowing the lever connector 200 to move away from the focusing protection assembly 400.

[0049] For example, such as Figure 2-5 As shown, the distal end of the lever connector 200 can be inserted into the focusing protection assembly 400. The predetermined force can include the maximum static friction between the distal end of the lever connector 200 and the focusing protection assembly 400. Thus, when the force on the lever connector 200 is less than or equal to the predetermined force, the distal end of the lever connector 200 cannot overcome the maximum static friction, thereby maintaining relative fixation with the focusing protection assembly 400. When the lever connector 200 is subjected to a tensile force in the direction of application that is greater than the maximum static friction, the distal end of the lever connector 200 can overcome the maximum static friction, thereby allowing it to move away from the focusing protection assembly 400 in the direction of application. This configuration results in a simpler structure for the focusing protection assembly 400, facilitating its manufacturing. When the lever connector 200 is subjected to a thrust force in the direction of application that is greater than the maximum static friction, the lever connector 200 can move towards the focusing protection assembly 400. In practical applications, after the lever connector 200 moves away from the focusing protection assembly 400 along the direction of force application, the focusing lever 610 can continue to rotate in the second direction when the head lens 710 moves to the far end of the focusing stroke. The focusing lever 610 can apply a thrust greater than the maximum static friction force to the lever connector 200, thereby causing the lever connector 200 to move towards the focusing protection assembly 400, so that the lever connector 200 can return to its initial position, thus facilitating the next use of the focusing protection device 100. The contact surface between the focusing protection assembly 400 and the lever connector 200 can be patterned or have increased roughness, thereby increasing the maximum static friction force between the far end of the lever connector 200 and the focusing protection assembly 400.

[0050] For example, such as Figure 2-5As shown, the focusing protection assembly 400 may include a first fixing member 410 and a friction member 420. The friction member 420 can be connected to the first fixing member 410 by any suitable method such as welding, bonding, or snap-fitting. The friction member 420 may be made of an elastic material such as silicone or rubber. The distal end of the lever connector 200 can be inserted into the friction member 420. The proximal end of the wire-drawing connector 300 can be connected to the first fixing member 410. Compared with other materials, the friction member 420 made of elastic material has a larger maximum static friction force with the lever connector 200, and the structure of the friction member 420 is relatively simple, making it easy to process and manufacture.

[0051] For example, such as Figure 2-5 As shown, the first fixing member 410 may include an elastic fixing member made of an elastic material such as silicone or rubber. The focusing protection assembly 400 may also include an adjusting member 430. The adjusting member 430 may be connected to the elastic fixing member. The adjusting member 430 may be used to compress the elastic fixing member, thereby compressing the friction member 420 through the elastic fixing member, and thus adjusting the maximum static friction force. The adjusting member 430 may include a movable abutment, a retaining ring, or any other suitable structure, thereby adjusting the force compressing the elastic fixing member. With this configuration, the maximum static friction force can be adjusted by the adjusting member 430 to match the different wire drawing types 810. In this way, the focusing protection device 100 can be applied to various wire drawing types 810, and has high applicability.

[0052] For example, such as Figure 2-5 As shown, the adjusting member 430 can be fitted onto the elastic fixing member. The adjusting member 430 may include a cylindrical sleeve 431 and a tapered sleeve 432 that tapers from the cylindrical sleeve 431 toward direction A. The cylindrical sleeve 431 may be threaded to the elastic fixing member. At least a portion of the tapered sleeve 432 may be fitted onto the outer periphery of the friction member 420. The cylindrical sleeve 431 can be rotated in a first direction (e.g., clockwise) to move the adjusting member 430 in direction B, thereby increasing the pressure exerted by the tapered sleeve 432 on the elastic fixing member, thus increasing the maximum static friction. Conversely, the cylindrical sleeve 431 can be rotated in a second direction (e.g., counterclockwise) to move the adjusting member 430 in direction A, thereby decreasing the pressure exerted by the tapered sleeve 432 on the elastic fixing member, thus decreasing the maximum static friction. In practical applications, the cylindrical sleeve 431 can typically be rotated during adjustment to determine the maximum static friction.

[0053] For example, such as Figure 2-5As shown, the focusing protection assembly 400 may further include a friction ring 440. The friction ring 440 can be clamped between the tapered sleeve 432 and the elastic retainer. The friction ring 440 may be tapered. The wear resistance of the friction ring 440 may be greater than that of the elastic retainer. With this arrangement, the friction ring 440 can rub against the tapered sleeve 432 during the rotation of the cylindrical sleeve 431. Due to the use of a friction ring 440 with higher wear resistance, the service life of the friction ring 440 is longer. The friction ring 440 may be made of, for example, a plastic material.

[0054] For example, such as Figure 2-5 As shown, the friction element 420 may include a friction sleeve 421. The distal end of the lever connector 200 may be inserted into the friction sleeve 421. The predetermined force may include the maximum static friction force between the distal end of the lever connector 200 and the inner wall of the friction sleeve 421. With this configuration, the contact area between the friction sleeve 421 and the distal end of the lever connector 200 is relatively large, thereby facilitating an increase in the maximum static friction force.

[0055] For example, such as Figure 2-5 As shown, the friction sleeve 421 may include a sleeve portion 423 and an annular retaining ring 424 protruding outward from the outer peripheral surface of the distal end of the sleeve portion 423. The distal end of the lever connector 200 can be inserted into the sleeve portion 423. The first fixing member 410 may be provided with an insertion hole 411 facing in the A direction. The shape of the insertion hole 411 can be adapted to the friction sleeve 421. The friction sleeve 421 can be inserted into the insertion hole 411 on the first fixing member 410 in the B direction by its elastic properties.

[0056] For example, such as Figure 6 As shown, the friction element 420 may include a sealing ring 422. The sealing ring 422 may be of various types known in the art or likely to emerge in the future. The distal end of the lever connector 200 may be inserted into the sealing ring 422. The predetermined force may include the maximum static friction between the distal end of the lever connector 200 and the inner wall of the sealing ring 422. The sealing ring 422 can be a standard component, eliminating the need for separate design and thus reducing the cost of the focusing protection assembly 400.

[0057] For example, such as Figure 6 As shown, the sealing rings 422 may include multiple rings spaced apart along the direction of force application. This arrangement allows for adjustment of the maximum static friction force by using multiple sealing rings 422.

[0058] For example, such as Figure 2-5As shown, the focusing protection assembly 400 is provided with a mounting hole 401. The mounting hole 401 can penetrate the focusing protection assembly 400 in the direction of force application. The distal end of the lever connector 200 and the proximal end of the wire drawing connector 300 can be inserted into the two ends of the mounting hole 401, respectively. The mounting hole 401 can not only be used to connect the lever connector 200 and the wire drawing connector 300, but also to allow the distal end of the lever connector 200 to be inserted into the focusing protection assembly 400, so that there is maximum static friction between the distal end of the lever connector 200 and the focusing protection assembly 400.

[0059] For example, such as Figure 7-10 As shown, the focusing protection assembly 400 may include a second fixing member 450 and an elastic deformable member 460. The proximal end of the wire drawing connector 300 may be connected to the second fixing member 450. The elastic deformable member 460 may be connected between the distal end of the lever connector 200 and the second fixing member 450. When the lever connector 200 is subjected to a force in the direction of application less than or equal to a predetermined force, the elastic deformable member 460 may remain in its original state. When the lever connector 200 is subjected to a tensile force in the direction of application greater than the predetermined force, the elastic deformable member 460 may be stretched in the direction of application, and the lever connector 200 may move away from the focusing protection assembly 400. After the elastic deformable member 460 is stretched, it may have elastic potential energy to restore its original state. Thus, when the focusing lever 610 is not rotated, the elastic deformable member 460 may automatically return to its original state for the next use of the focusing protection device 100.

[0060] For example, such as Figure 7-10 As shown, the elastic deformable element 460 may include any suitable elastic deformable element such as a spring tube or a spring. The spring has a relatively simple structure and can be a standard component, thus reducing costs. For example, both ends of the spring can be welded to the proximal end of the wire-drawing connector 300 and the second fixing element 450, respectively. The spring can be either a tension spring or a compression spring.

[0061] For example, such as Figure 7-10 As shown, the distal end of the lever connector 200 may be provided with a first positioning hole 210. The second fixing member 450 may be provided with a second positioning hole 451. The first positioning hole 210 and the second positioning hole 451 may face each other. In an embodiment where the elastic deformable member 460 includes a spring, both the first positioning hole 210 and the second positioning hole 451 may be annular holes. Both ends of the elastic deformable member 460 may be inserted into the first positioning hole 210 and the second positioning hole 451, respectively. The first positioning hole 210 and the second positioning hole 451 may position the elastic deformable member 460, thereby ensuring that the elastic deformable member 460 is in the expected position.

[0062] For example, such as Figure 7-10As shown, a third positioning hole 220 may be provided at the distal end of the lever connector 200. A second fixing member 450 can be inserted into the third positioning hole 220. The third positioning hole 220 can position the second fixing member 450, thereby ensuring that the lever connector 200 and the second fixing member 450 are in the expected positions. Furthermore, the second fixing member 450 can also guide the movement of the lever connector 200. Exemplarily, the second fixing member 450 can pass through the elastic deformable member 460 to be inserted into the third positioning hole 220.

[0063] The above only describes the differences between different embodiments. The same reference numerals are used for the same or similar parts in different embodiments, and for the sake of brevity, these same or similar parts will not be described in detail here.

[0064] Exemplarily, the proximal end of the wire-drawing connector 300 is detachably connected to the focusing protection assembly 400. This detachability includes, but is not limited to, plug-in or snap-fit ​​connections. Figure 1-10 In the embodiment shown, the focusing protection assembly 400 may be provided with a threaded hole 402. The proximal end of the wire drawing connector 300 can be inserted into the focusing protection assembly 400. Furthermore, the proximal end of the wire drawing connector 300 may be provided with a slot 310. The focusing protection assembly 400 may also include a screw 470. The screw 470 can be threaded into the threaded hole 402, thereby being inserted into the slot 310. Thus, the proximal end of the wire drawing connector 300 can be connected to the focusing protection assembly 400. Exemplarily, the threaded hole 402 may be provided on the first fixing member 410 or the second fixing member 450.

[0065] For example, such as Figure 1-10 As shown, the focusing protection device 100 may further include a slide block 510 and a slider 520. The slider 520 is slidably connected to the slide block 510. The slider 520 can be used to connect between the proximal end of the lever connector 200 and the focusing lever 610. Exemplarily, both the proximal end of the lever connector 200 and the focusing lever 610 can be connected to the slider 520 by screws. When the lever connector 200 moves, the slider 520 can slide along the slide block 510. By providing the slide block 510 and the slider 520, the lever connector 200 can be better guided.

[0066] For example, such as Figure 1-10As shown, the focusing protection device 100 may further include a base 530 and a guide ring 540. The guide ring 540 may be disposed on the base 530. The wire drawing connector 300 may pass through the guide ring 540, thereby being able to move along the guide ring 540. By providing the base 530 and the guide ring 540, the wire drawing connector 300 can be effectively guided, allowing the wire drawing 810 to drive the head lens 710 to move along the axial direction of the lens body without deviating. The slide 510 and the base 530 may be connected by any suitable method such as welding, connector connection, or casting.

[0067] In the description of this utility model, it should be understood that the directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" indicate the orientation or positional relationship, which are usually based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0068] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0069] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0070] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0071] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A focusing protection device, characterized in that, include: A lever connector, the proximal end of which is used to connect to a focusing lever on the operating unit; A wire-drawing connector, the distal end of which is used to connect to a wire for connection to the head end lens on the insertion part via the wire; as well as A focusing protection assembly is connected between the distal end of the lever connector and the proximal end of the wire-drawing connector. The lever connector receives force applied by the focusing lever, which, in turn, drives the head-end lens to move via the focusing protection assembly, the wire-drawing connector, and the wire-drawing mechanism. The distal end of the lever connector is movable relative to the focusing protection assembly in the direction of the applied force. When the lever connector is subjected to a force along the applied force direction that is less than or equal to a predetermined force, it moves synchronously with the focusing protection component along the applied force direction; when the lever connector is subjected to a tension along the applied force direction that is greater than the predetermined force, it moves away from the focusing protection component along the applied force direction.

2. The focusing protection device as described in claim 1, characterized in that, The distal end of the lever connector is inserted into the focusing protection assembly. The predetermined force includes the maximum static friction between the distal end of the lever connector and the focusing protection assembly. When the lever connector is subjected to a tensile force in the direction of the applied force that is greater than the maximum static friction, it moves away from the focusing protection assembly in the direction of the applied force. When the lever connector is subjected to a thrust force in the direction of the applied force that is greater than the maximum static friction, it moves toward the focusing protection assembly in the direction of the applied force.

3. The focusing protection device as described in claim 2, characterized in that, The focusing protection assembly includes a first fixing member and a friction member made of elastic material connected to the first fixing member, the distal end of the lever connector being inserted into the friction member, and the proximal end of the wire drawing connector being connected to the first fixing member.

4. The focusing protection device as described in claim 3, characterized in that, The first fixing member includes an elastic fixing member made of an elastic material, and the focusing protection assembly further includes an adjusting member connected to the elastic fixing member, the adjusting member being used to press the friction member through the elastic fixing member to adjust the maximum static friction force.

5. The focusing protection device as described in claim 4, characterized in that, The adjusting member is sleeved on the elastic fixing member. The adjusting member includes a cylindrical sleeve and a tapered sleeve that tapers from the cylindrical sleeve. The cylindrical sleeve is threaded to the elastic fixing member, and the tapered sleeve is at least partially sleeved on the outer periphery of the friction member.

6. The focusing protection device as described in claim 5, characterized in that, The focusing protection assembly also includes a friction ring, which is clamped between the conical sleeve and the elastic fixing member, and the friction ring has greater wear resistance than the elastic fixing member.

7. The focusing protection device as described in claim 3, characterized in that, The friction element includes a friction sleeve, and the distal end of the lever connector is inserted into the friction sleeve.

8. The focusing protection device as described in claim 3, characterized in that, The friction element includes a sealing ring, and the distal end of the lever connector is inserted into the sealing ring.

9. The focusing protection device as described in claim 8, characterized in that, The sealing rings include a plurality of rings spaced apart along the direction of the applied force.

10. The focusing protection device as described in claim 2, characterized in that, The focusing protection component is provided with a mounting hole that runs through the direction of the applied force, and the distal end of the lever connector and the proximal end of the wire drawing connector are respectively inserted into the two ends of the mounting hole.

11. The focusing protection device as described in claim 1, characterized in that, The focusing protection assembly includes a second fixing member and an elastic deformation member. The proximal end of the wire drawing connector is connected to the second fixing member, and the elastic deformation member is connected between the distal end of the lever connector and the second fixing member. When the lever connector is subjected to a force along the applied force direction that is less than or equal to a predetermined force, the elastic deformation member remains in its original state. When the lever connector is subjected to a tensile force along the applied force direction that is greater than the predetermined force, the elastic deformation member is stretched along the applied force direction.

12. The focusing protection device as described in claim 11, characterized in that, The elastic deformable element includes a spring.

13. The focusing protection device as described in claim 11, characterized in that, The distal end of the lever connector is provided with a first positioning hole, the second fixing member is provided with a second positioning hole, and the two ends of the elastic deformation member are respectively inserted into the first positioning hole and the second positioning hole.

14. The focusing protection device as described in claim 11, characterized in that, The distal end of the lever connector is provided with a third positioning hole, and the second fixing member is inserted into the third positioning hole.

15. The focusing protection device as described in claim 1, characterized in that, The proximal end of the wire drawing connector is detachably connected to the focusing protection assembly.

16. The focusing protection device as described in claim 1, characterized in that, The focusing protection device further includes a slide block and a slider slidably connected to the slide block, the slider being used to connect between the proximal end of the lever connector and the focusing lever.

17. The focusing protection device as described in claim 1, characterized in that, The focusing protection device also includes a base and a guide ring disposed on the base, and the wire drawing connector passes through the guide ring.

18. An endoscope, characterized in that, The device includes an operating part, a wire drawing part, an insertion part, and a focusing protection device as described in any one of claims 1-17, wherein the proximal end of the lever connector is connected to the focusing lever on the operating part, and the wire drawing part is connected between the distal end of the wire drawing connector and the head lens on the insertion part.

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