Endoscope zoom device and endoscope

Abstract

The utility model discloses an endoscope zoom device and endoscope, include: fixed lens barrel, mobile lens barrel are connected with fixed lens barrel sliding, first elastic part, be located between the first side of mobile lens barrel and fixed lens barrel, second elastic part, be located between the second side of mobile lens barrel and fixed lens barrel, first side and second side are the two sides of mobile lens barrel along its moving direction and diverge, the extension direction of first elastic part and second elastic part are same with moving direction, under initial state, first elastic part and second elastic part are all in compression state, traction member is connected with second elastic part, is used for to second elastic member and releases second elastic member, and when traction member adds the tension of second elastic member, makes second elastic member compress in the direction of moving away from mobile lens barrel. Mobile lens barrel is not directly contacted or connected with traction member, and the elasticity of first elastic part and second elastic part is relied on to realize mobile lens barrel movement, and the stability of mobile lens barrel movement is ensured, avoids jamming.

Description

Technical Field

[0001] This utility model relates to the field of endoscope structure technology, and more specifically, to an endoscope zoom device. Furthermore, this utility model also relates to an endoscope including the aforementioned endoscope zoom device. Background Technology

[0002] In order to more intuitively observe the details of the lesion location, such as the morphology of the mucosa on the lesion surface, so as to facilitate the diagnosis of the disease, endoscopes with optical magnification function have been gradually applied. The endoscope mainly uses a zoom device to move the zoom lens in the objective lens optical system relative to the fixed lens along the optical axis to achieve optical zoom.

[0003] In related technologies, a steel wire rope is used to pull the zoom lens barrel to achieve optical zoom. This method of achieving zoom lens barrel movement is simple and the structure is easy to implement. However, when the endoscope encounters complex working conditions with large bends, the steel wire rope will rotate and deviate to a certain extent. This causes the zoom lens barrel to deviate accordingly, which can easily lead to jamming of the zoom lens barrel and zoom failure.

[0004] In conclusion, how to prevent moving lens barrels, such as zoom lens barrels, from jamming is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an endoscope zoom device that can prevent the moving endoscope tube from getting stuck.

[0006] Another objective of this invention is to provide an endoscope that includes the aforementioned endoscope zoom device, which can prevent the moving endoscope tube from getting stuck.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An endoscope zoom device, comprising:

[0009] Fixed lens tube;

[0010] The movable lens barrel is slidably connected to the fixed lens barrel;

[0011] A first elastic element is disposed between the first side of the movable lens barrel and the fixed lens barrel;

[0012] The second elastic element is disposed between the second side of the movable lens barrel and the fixed lens barrel. The first side and the second side are two sides of the movable lens barrel that are opposite to each other along its moving direction. The extension and contraction directions of the first elastic element and the second elastic element are the same as the moving direction, and in the initial state, the first elastic element and the second elastic element are both in a compressed state.

[0013] A traction member, connected to the second elastic member, is used to apply a tension force to the second elastic member or release the second elastic member. When the traction member applies the tension force to the second elastic member, it compresses the second elastic member in a direction away from the moving lens barrel.

[0014] Optionally, the end of the traction member near the movable lens barrel is connected to a first guide member, the first guide member abuts against the movable lens barrel, and the second elastic member is disposed between the first guide member and the fixed lens barrel.

[0015] Optionally, the fixed lens barrel is connected to a guide tube, the traction member is movably disposed inside the guide tube, and one end of the traction member near the movable lens barrel extends out of the guide tube, and the second elastic member is disposed between the first guide member and the guide tube.

[0016] Optionally, the fixed lens tube is connected to a sleeve, the first guide member is slidably sleeved inside the sleeve, the guide tube is connected to the inner wall of the sleeve, and the second elastic member is sleeved on the outer periphery of the traction member and located inside the sleeve.

[0017] Optionally, the fixed lens barrel includes:

[0018] The first lens barrel, and the movable lens barrel is slidably connected to the first lens barrel;

[0019] The second lens barrel is connected to the first lens barrel. The first elastic element is disposed between the second lens barrel and the movable lens barrel. At least one of the second lens barrel and the movable lens barrel is provided with a first groove for setting the first elastic element and a second guide for guiding the extension and retraction of the first elastic element.

[0020] Optionally, the first lens tube includes:

[0021] The lens barrel body has a first mounting hole and a first opening. The first opening penetrates the wall thickness of the lens barrel body and extends along the axial direction of the lens barrel body to one end of the lens barrel body facing the second lens barrel. The movable lens barrel is slidably disposed in the first mounting hole, and the movable lens barrel has a first connecting part extending out of the first opening. The first elastic element is disposed between the second lens barrel and the first connecting part.

[0022] The second connecting part is connected to the lens barrel body and is located at one end of the first opening. It is used to stop and limit the side of the first connecting part away from the second lens barrel. The second elastic member is disposed between the first connecting part and the second connecting part.

[0023] Optionally, it also includes:

[0024] A sealing cap is connected to the second lens barrel and the second connecting part, respectively, and covers the outer periphery of the first connecting part and the second connecting part to seal the first opening.

[0025] Optionally, the fixed lens barrel may further include a third lens barrel connected to the end of the first lens barrel that is away from the second lens barrel.

[0026] Optionally, it also includes a lens mount connected to the fixed lens barrel, the lens mount being equipped with a sensor.

[0027] An endoscope comprising any of the above-mentioned endoscope zoom devices.

[0028] The endoscope zoom device provided by this utility model has the following characteristics: In its initial state, both the first and second elastic elements are compressed. The balanced force between them keeps the moving endoscope tube in its initial position. This state is defined as the conventional mode of the endoscope zoom device, such as the wide-angle mode. When an external force is applied to the traction element, causing it to exert a tension force on the second elastic element, the second elastic element is further compressed away from the moving endoscope tube. At this time, the pressure exerted by the second elastic element on the moving endoscope tube decreases, making the thrust generated by the first elastic element on the moving endoscope tube greater than the thrust generated by the second elastic element. Thus, under the action of the elastic force of the first elastic element, the moving endoscope tube moves towards the side where the second elastic element is located, realizing a change in the position of the moving endoscope tube and achieving zoom. The zoom position can be defined as when the moving endoscope tube moves a preset distance towards the direction of the second elastic element. This position can be determined by the stroke of the traction element. At this time, the endoscope zoom device is in magnification mode. In use, the endoscope zoom device can be used in its normal mode first to observe the target object at normal magnification. When an abnormality is observed, the traction device can be operated to switch the movable endoscope tube to the zoom position, thus switching the endoscope zoom device to magnification mode for better observation of the target object. When the movable endoscope tube needs to move from the zoom position to the initial position, the traction device releases the second elastic element. At this time, the thrust generated by the second elastic element on the movable endoscope tube is greater than the thrust generated by the first elastic element. Therefore, under the action of the elastic force of the second elastic element, the movable endoscope tube moves towards the side where the first elastic element is located, realizing the position change of the movable endoscope tube and returning it to the initial position. At this time, the elastic forces of the first and second elastic elements are balanced, keeping the movable endoscope tube in the initial position.

[0029] As can be seen, when the moving lens barrel switches between the initial position and the zoom position, it does not directly contact or connect with the traction component. Instead, it relies on the elastic forces of the first and second elastic components to move. Therefore, the impact of the traction component's positional offset on the moving lens barrel is reduced. Furthermore, the expansion and contraction directions of the first and second elastic components ensure the correctness and stability of the moving lens barrel's direction of movement, thus guaranteeing the correctness and stability of the lens barrel's movement and helping to avoid problems such as focusing jamming. Moreover, when zooming is achieved by applying tension to the second elastic component through the traction component, only the elastic force of the second elastic component needs to be overcome. Since the lens barrel's offset or even jamming can be avoided, there is no need to consider the increased tension caused by the lens barrel's offset or jamming, further helping to prevent focusing failure. In addition, the first and second elastic components have buffering properties, which can reduce the impact of the force on the moving lens barrel from the traction component, thereby further ensuring the stability of the focusing process.

[0030] The endoscope provided by this utility model includes the above-mentioned endoscope zoom device and has at least the same beneficial effects as the endoscope zoom device. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 A schematic diagram of the endoscope zoom device provided in a specific embodiment of this utility model;

[0033] Figure 2 for Figure 1 A cross-sectional view of the moving lens barrel in its initial position;

[0034] Figure 3 for Figure 1 A cross-sectional view of the lens barrel in the zoom position;

[0035] Figure 4 for Figure 1 Exploded view;

[0036] Figure 5 This is a schematic diagram of the first lens tube.

[0037] Figure 6 This is a schematic diagram of the movable lens tube.

[0038] Figure 7 This is a schematic diagram of the second lens tube.

[0039] Figure label:

[0040] 1-Fixed lens barrel; 11-First lens barrel; 111-Lens barrel body; 1111-First mounting hole; 1112-First opening; 1113-Platform; 112-Second connecting part; 1121-Guide hole; 1122-Second recess; 12-Second lens barrel; 121-Second mounting hole; 122-Third connecting part; 123-First groove; 124-First recess; 125-Notch; 13-Third lens barrel; 2-Moving lens barrel; 21-The 1. Connecting part; 22. Second groove; 23. Second connecting hole; 3. First elastic element; 4. Second elastic element; 5. Traction element; 6. First guide element; 61. Air outlet; 7. Guide tube; 8. Sleeve; 81. First chamfer; 9. Second guide element; 10. Sealing cover; 101. First edge; 102. Second edge; 20. Mirror base; 201. Third mounting hole; 202. Second opening; 2021. Second chamfer; 21. Sensor. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0042] The core of this invention is to provide an endoscope zoom device that prevents the moving endoscope tube from getting stuck. Another core aspect of this invention is to provide an endoscope including the aforementioned endoscope zoom device, which also prevents the moving endoscope tube from getting stuck.

[0043] Please refer to Figure 1 , Figure 2 and Figure 3This utility model provides an endoscope zoom device, including a fixed endoscope tube 1, a movable endoscope tube 2, a first elastic element 3, a second elastic element 4, and a traction element 5. The movable endoscope tube 2 is slidably connected to the fixed endoscope tube 1. The first elastic element 3 is disposed between the first side of the movable endoscope tube 2 and the fixed endoscope tube 1. The second elastic element 4 is disposed between the second side of the movable endoscope tube 2 and the fixed endoscope tube 1. The first side and the second side are two sides of the movable endoscope tube 2 that are opposite to each other along its moving direction. The extension and retraction directions of the first elastic element 3 and the second elastic element 4 are the same as the moving direction of the movable endoscope tube 2, and in the initial state, both the first elastic element 3 and the second elastic element 4 are in a compressed state. The traction element 5 is connected to the second elastic element 4 and is used to apply tension force to the second elastic element 4 or release the second elastic element 4. When the traction element 5 applies tension force to the second elastic element 4, it compresses the second elastic element 4 in a direction away from the movable endoscope tube 2.

[0044] Understandably, in the initial state, both the first elastic element 3 and the second elastic element 4 are in a compressed state. The balanced force between them keeps the movable endoscope tube 2 in its initial position. This is defined as the endoscope zoom device in its normal mode, such as wide-angle mode. When an external force is applied to the traction element 5, causing it to exert a tension force on the second elastic element 4, the second elastic element 4 is further compressed away from the movable endoscope tube 2. At this time, the pressure exerted by the second elastic element 4 on the movable endoscope tube 2 decreases, making the thrust generated by the first elastic element 3 on the movable endoscope tube 2 greater than the thrust generated by the second elastic element 4. Thus, under the elastic force of the first elastic element 3, the movable endoscope tube 2 moves towards the side where the second elastic element 4 is located, achieving a change in the position of the movable endoscope tube 2 and achieving zoom. The zoom position can be defined as when the movable endoscope tube 2 moves a preset distance towards the direction of the second elastic element 4. This position can be determined by the stroke of the traction element 5. At this time, the endoscope zoom device is in magnification mode. When using it, you can first use the normal mode of the endoscope zoom device to observe the target object at the normal magnification; when you see something unusual, you can then operate the traction component 5 to switch the moving tube 2 to the zoom position, so that the endoscope zoom device can be switched to the magnification mode for better observation of the target object.

[0045] When the movable lens barrel 2 needs to move from the zoom position to the initial position, the traction member 5 releases the second elastic member 4. At this time, the thrust generated by the second elastic member 4 on the movable lens barrel 2 is greater than the thrust generated by the first elastic member 3 on the movable lens barrel 2. Thus, under the action of the elastic force of the second elastic member 4, the movable lens barrel 2 moves towards the side where the first elastic member 3 is located, realizing the position change of the movable lens barrel 2 and resetting the movable lens barrel 2 to the initial position. At this time, the elastic forces of the first elastic member 3 and the second elastic member 4 are balanced, keeping the movable lens barrel 2 in the initial position.

[0046] It can be seen that when the moving lens barrel 2 switches between the initial position and the zoom position, the moving lens barrel 2 does not directly contact or connect with the traction member 5. Instead, it relies on the elastic force of the first elastic member 3 and the second elastic member 4 to move the lens barrel 2. Therefore, the influence of the positional displacement of the traction member 5 on the moving lens barrel 2 can be reduced. Furthermore, the extension and retraction directions of the first elastic member 3 and the second elastic member 4 ensure the correctness and stability of the moving direction of the lens barrel 2, thereby ensuring the correctness and stability of the moving process of the lens barrel 2 and helping to avoid problems such as focusing jamming failure. Moreover, when zooming is achieved by applying tension to the second elastic member 4 through the traction member 5, it is only necessary to overcome the elastic force of the second elastic member 4. Since the displacement or even jamming of the moving lens barrel 2 can be avoided, there is no need to consider the displacement or jamming of the moving lens barrel 2 due to increased tension, which is more conducive to avoiding focusing failure. In addition, the first elastic member 3 and the second elastic member 4 have buffering properties, which can reduce the impact of the force on the traction member 5 on the moving lens barrel 2, thereby further ensuring the stability of the focusing process.

[0047] Further, please refer to Figure 2 and Figure 3 In some embodiments, the end of the traction member 5 near the movable lens barrel 2 is connected to a first guide member 6, the first guide member 6 abuts against the movable lens barrel 2, and the second elastic member 4 is disposed between the first guide member 6 and the fixed lens barrel 1.

[0048] In other words, in this embodiment, the elastic force of the second elastic element 4 is transmitted to the moving lens barrel 2 through the first guide element 6. At the same time, since the first guide element 6 is connected to the traction element 5, when an external force is applied to the traction element 5, the traction element 5 exerts a force on the first guide element 6. When the force exerted by the traction element 5 on the first guide element 6 causes the first guide element 6 to squeeze the second elastic element 4, that is, the traction element 5 applies a tensioning force to the second elastic element 4 through the first guide element 6. At this time, the moving lens barrel 2 is moved from the initial position to the zoom position. When the force exerted by the traction element 5 on the first guide element 6 causes the first guide element 6 to move away from the second elastic element 4, that is, the traction element 5 releases the second elastic element 4. At this time, under the action of the thrust generated by the first guide element 6 on the moving lens barrel 2 and the elastic force of the second elastic element 4, the moving lens barrel 2 is moved from the zoom position to the initial position. That is, in this embodiment, when the traction member 5 is pushed, causing the traction member 5 to push the first guide member 6 to push the moving lens barrel 2 in a direction away from the second elastic member 4, the second elastic member 4 begins to recover its deformation from the compressed state. The second elastic member 4 itself provides a force to the moving lens barrel 2 to move the moving lens barrel 2 in the direction of the first elastic member 3. At the same time, under the force of the traction member 5, the first guide member 6 will also generate a thrust on the moving lens barrel 2, so that the thrust of the first guide member 6 and the elastic force of the second elastic member 4 work together to move the moving lens barrel 2 from the zoom position to the initial position.

[0049] As can be seen, compared with the prior art where the moving endoscope tube 2 is directly driven from the zoom position to the initial position by the thrust of the steel wire rope, this embodiment provides an additional thrust by the second elastic element 4. Therefore, when the moving endoscope tube 2 moves from the zoom position to the initial position, the magnitude of the force applied to the traction element 5 can be reduced, making it easier to push the lever at the operating target of the endoscope used to control the force of the traction element 5, which is more labor-saving and convenient for users.

[0050] For further information, please continue to refer to [link / reference]. Figure 2 and Figure 3 In order to facilitate limiting the end of the second elastic member 4 away from the first guide member 6, in some embodiments, the fixed lens barrel 1 is connected to the guide tube 7, the traction member 5 is movably disposed in the guide tube 7, and the end of the traction member 5 near the movable lens barrel 2 extends out of the guide tube 7, and the second elastic member 4 is disposed between the first guide member 6 and the guide tube 7.

[0051] In other words, in this embodiment, by providing a guide tube 7 on the fixed lens barrel 1 and positioning the guide tube 7 at the end of the second elastic member 4 away from the first guide member 6, the second elastic member 4 is located between the ends of the first guide member 6 and the guide tube 7. Therefore, when the first guide member 6 moves towards the side where the second elastic member 4 is located, the second elastic member 4 can be further compressed under the stop and limit of the guide tube 7. Simultaneously, the traction member 5 is movably disposed within the guide tube 7, which facilitates the guidance and limitation of the movement of the traction member 5 using the guide tube 7, ensuring the reliability of the movement of the traction member 5 and preventing the traction member 5 from deviating.

[0052] For further information, please continue to refer to [link / reference]. Figure 2 and Figure 3 Considering the ease of assembly and the correctness of the movement direction of the first guide member 6, in some embodiments, the fixed lens tube 1 is connected to the sleeve 8, the first guide member 6 is slidably sleeved in the sleeve 8, the guide tube 7 is connected to the inner wall of the sleeve 8, and the second elastic member 4 is sleeved on the outer periphery of the traction member 5 and located in the sleeve 8.

[0053] In other words, this embodiment adds a sleeve 8, allowing the first guide member 6 and the second elastic member 4 to be installed inside the sleeve 8. Simultaneously, the guide tube 7 is connected to the sleeve 8 for easy assembly. During assembly, the guide tube 7 can be first connected to the inner wall of the sleeve 8, for example, by using an adhesive (such as glue) to fix the guide tube 7 and the sleeve 8 together. Then, the sleeve 8 is connected to the fixed lens barrel 1. Next, the second elastic member 4 is placed inside the sleeve 8, with the end of the second elastic member 4 facing the guide tube 7 limited by the end of the guide tube 7. Then, the first guide member 6 is connected to the traction member 5, and the traction member 5 is inserted into the sleeve 8 from the end away from the guide tube 7 until the end of the traction member 5 away from the first guide member 6 protrudes from the guide tube 7, and at least a portion of the first guide member 6 is inserted into the sleeve 8. Therefore, this structure facilitates the overall assembly of the first guide member 6, the traction member 5, and the second elastic member 4. In addition, in this embodiment, the inner wall of the sleeve 8 guides and limits the first guide member 6, which helps to ensure the correctness of the movement direction and the smoothness of the movement of the first guide member 6. At the same time, the inner wall of the sleeve 8 also has a circumferential limiting effect on the second elastic member 4, which can ensure the correctness and smoothness of the extension and retraction direction of the second elastic member 4 and avoid the second elastic member 4 from being skewed.

[0054] It should be noted that this embodiment does not limit the specific connection method between the fixed lens barrel 1 and the sleeve 8, as long as the connection between the two can be achieved. In some embodiments, the fixed lens barrel 1 and the sleeve 8 are threaded together. Please refer to... Figure 2 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the fixed lens barrel 1 is provided with a guide hole 1121 and an internal thread, and the outer periphery of the sleeve 8 is provided with an external thread. The guide hole 1121 mates with the outer periphery of the sleeve 8, and the internal thread mates with the external thread. The single-sided gap between the guide hole 1121 and the sleeve 8 can be controlled within 0.005-0.01mm to ensure the coaxiality of the sleeve 8 and the fixed lens barrel 1 after thread engagement.

[0055] In addition, in some embodiments, the first guide member 6 and the inner hole of the sleeve 8 are fitted with a clearance, with a single-sided clearance of 0.01-0.02 mm, to ensure the smoothness and stability of the movement of the first guide member 6.

[0056] In addition, such as Figure 2 and Figure 3 As shown, in some embodiments, the inner wall of the end of the sleeve 8 away from the first guide member 6 is provided with a first chamfer 81. In this way, when the guide tube 7 is fixed to the inner wall of the sleeve 8, adhesive can be applied to the outer periphery of the guide tube 7, and then the guide tube 7 is placed into the sleeve 8. During this process, the adhesive on the outer periphery of the guide tube 7 will overflow outward, thus remaining at the first chamfer 81 of the sleeve 8, which makes the seal between the sleeve 8 and the guide tube 7 better.

[0057] In addition, such as Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the first guide member 6 is provided with a first connecting hole and an vent 61 communicating with the first connecting hole. The vent 61 penetrates the hole wall of the first guide member 6 at the location corresponding to the first connecting hole. The first connecting hole is clearance-fitted with the traction member 5 and is fixed by soldering. It can be understood that the vent 61 is used to vent air during soldering of the first guide member 6 and the traction member 5, so as to improve the fluidity of the solder and make the soldering of the first guide member 6 and the traction member 5 more thorough and firm. In some embodiments, the single-sided gap between the first connecting hole and the traction member 5 is 0.03-0.05mm.

[0058] Additionally, please combine Figure 2 , Figure 3 and Figure 7 To facilitate the installation of the movable lens barrel 2 and the first elastic member 3, in some embodiments, the fixed lens barrel 1 includes a first lens barrel 11 and a second lens barrel 12, the movable lens barrel 2 is slidably connected to the first lens barrel 11; the second lens barrel 12 is connected to the first lens barrel 11, the first elastic member 3 is disposed between the second lens barrel 12 and the movable lens barrel 2, and at least one of the second lens barrel 12 and the movable lens barrel 2 is provided with a first groove 123 for setting the first elastic member 3 and a second guide member 9 for guiding the extension and retraction of the first elastic member 3.

[0059] In other words, this embodiment divides the fixed endoscope tube 1 into two separate endoscope tubes: a first endoscope tube 11 and a second endoscope tube 12. The second endoscope tube 12 can be connected to the first endoscope tube 11 after the movable endoscope tube 2 is assembled with the first endoscope tube 11, facilitating a sliding connection between the movable endoscope tube 2 and the first endoscope tube 11. Furthermore, placing the first elastic member 3 between the movable endoscope tube 2 and the second endoscope tube 12 also facilitates its installation. Simultaneously, placing the first elastic member 3 within the first groove 123 helps to save structural dimensions along the extension / retraction direction of the first elastic member 3, reducing the overall volume of the endoscope zoom device in that direction. It is important to note that the first elastic member 3 must be in contact with the movable endoscope tube 2 to generate an elastic force on it. Additionally, the initial position of the movable endoscope tube 2 can be limited by the end of the first groove 123, ensuring the reliability of its initial position. In addition, using the second guide member 9 to guide and limit the extension and retraction of the first elastic member 3 helps to ensure the correctness and stability of the movement direction of the first elastic member 3 and prevent the first elastic member 3 from tilting.

[0060] like Figure 2 , Figure 3 and Figure 7As shown, in some embodiments, a first groove 123 is provided in the second lens barrel 12, and the second guide member 9 is connected to the movable lens barrel 2. In some embodiments, the first groove 123 is a blind groove, that is, the first groove 123 does not penetrate the wall thickness of the corresponding position of the second lens barrel 12. In this way, after the first elastic member 3 is placed in the first groove 123, the side wall of the first groove 123 can be used to limit the end of the first elastic member 3 away from the movable lens barrel 2. In addition, in some embodiments, the movable lens barrel 2 is provided with a second connecting hole 23, and the second guide member 9 is clearance-fitted with the second connecting hole 23 and fixed by adhesive. For example, by applying glue to the outer periphery of the second guide member 9, the second guide member 9 is inserted into the second connecting hole 23 of the movable lens barrel 2 to achieve the connection between the second guide member 9 and the movable lens barrel 2. It can be understood that in this arrangement, the main function of the second guide member 9 is to prevent the first elastic member 3 from shifting or popping out during movement, and to play a good limiting role for the first elastic member 3. To ensure the second guide member 9 provides effective guidance for the first elastic member 3, in some embodiments, the second guide member 9 is fitted inside the first elastic member 3. That is, when the first elastic member 3 extends or retracts, it extends or retracts along the second guide member 9, thereby using the second guide member 9 to define the direction of extension or retraction of the first elastic member 3, ensuring the correctness of the direction of extension or retraction and the stability of the extension or retraction movement, and preventing the first elastic member 3 from skewing. For example, the first elastic member 3 is a spring, fitted around the outer periphery of the second guide member 9.

[0061] It should be noted that the specific structures of the first elastic element 3 and the second elastic element 4 are not limited in the above embodiments, as long as the first elastic element 3 and the second elastic element 4 are elastic, can expand and contract under external force, and can return to their original position when the external force is released. In some embodiments, the first elastic element 3 and the second elastic element 4 are springs. It is understood that the first elastic element 3 and the second elastic element 4 can also be other elastic components. For example, the first elastic element 3 and the second elastic element 4 can be elastic blocks, or the first elastic element 3 and the second elastic element 4 can also be elastic components composed of springs and other structural components, as long as the first elastic element 3 is located between the first side of the movable lens barrel 2 and the fixed lens barrel 1; the second elastic element 4 is located between the second side of the movable lens barrel 2 and the fixed lens barrel 1; the expansion and contraction directions of the first elastic element 3 and the second elastic element 4 are the same as the movement direction of the movable lens barrel 2; and in the initial state, the first elastic element 3 and the second elastic element 4 are both in a compressed state.

[0062] Furthermore, this embodiment does not limit the specific connection method between the second lens barrel 12 and the first lens barrel 11, as long as the connection between the two can be achieved. Please refer to... Figure 2 , Figure 3 , Figure 5 and Figure 7In some embodiments, the second lens barrel 12 is provided with a second mounting hole 121, and the outer periphery of the first lens barrel 11 mates with the shaft hole of the second mounting hole 121 and is fixed by adhesive. For example, before fitting the outer periphery of the first lens barrel 11 into the second mounting hole 121, adhesive is first applied to the second mounting hole 121, and then the second mounting hole 121 is fitted onto the outer periphery of the first lens barrel 11, and then the adhesive is cured by baking.

[0063] Furthermore, please combine Figure 2 , Figure 3 , Figure 5 and Figure 6 In some embodiments, the first lens barrel 11 includes a lens barrel body 111 and a second connecting portion 112. The lens barrel body 111 is provided with a first mounting hole 1111 and a first opening 1112. The first opening 1112 penetrates the wall thickness of the lens barrel body 111 and extends along the axial direction of the lens barrel body 111 to one end of the lens barrel body 111 facing the second lens barrel 12. The movable lens barrel 2 is slidably disposed in the first mounting hole 1111, and the movable lens barrel 2 is provided with a first connecting portion 21 extending out of the first opening 1112. A first elastic member 3 is disposed between the second lens barrel 12 and the first connecting portion 21. The second connecting portion 112 is connected to the lens barrel body 111 and is located at one end of the first opening 1112. It is used to stop and limit the side of the first connecting portion 21 away from the second lens barrel 12. A second elastic member 4 is disposed between the first connecting portion 21 and the second connecting portion 112.

[0064] In other words, in this embodiment, the movable lens barrel 2 mates with the shaft hole of the first lens barrel 11 to ensure that the movable lens barrel 2 can move relative to the first lens barrel 11. Simultaneously, by providing a first opening 1112 extending axially along the lens barrel body 111, the first connecting portion 21 is prevented from moving with the movable lens barrel 2. Furthermore, the first opening 1112 extends to the end of the lens barrel body 111 facing the second lens barrel 12, which facilitates the sliding of the movable lens barrel 2 from the end of the lens barrel body 111 facing the second lens barrel 12 into the first mounting hole 1111, thus achieving the assembly of the movable lens barrel 2 and the first lens barrel 11. The second connecting portion 112 is located at the end of the first opening 1112 away from the second lens barrel 12, which facilitates the use of the second connecting portion 112 to limit the first connecting portion 21, thereby limiting the zoom position of the movable lens barrel 2. At the same time, it is convenient to use the second connecting portion 112 to install the second elastic member 4.

[0065] In some embodiments, the clearance between the movable lens barrel 2 and the first mounting hole 1111 is 0.01-0.02 mm to ensure the coaxiality of the first lens barrel 11 and the second lens barrel 12, preventing image blurring caused by the movable lens barrel 2 deviating from the optical axis during zooming. To reduce sliding friction between the movable lens barrel 2 and the first mounting hole 1111, such as... Figure 6As shown, in some embodiments, the outer periphery of the movable lens barrel 2 is provided with a second groove 22. The second groove 22 can reduce the contact area between the movable lens barrel 2 and the first mounting hole 1111, thereby reducing the friction between the two.

[0066] In addition, to facilitate the placement of the first elastic member 3 between the second lens barrel 12 and the first connecting portion 21, such as Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the second lens barrel 12 is provided with a third connecting portion 122, which corresponds to the first connecting portion 21, and the first elastic member 3 is disposed between the third connecting portion 122 and the first connecting portion 21. In this way, by setting the relative positions of the third connecting portion 122, the first connecting portion 21, and the second connecting portion 112, it is beneficial to ensure that the axes of the first elastic member 3 and the second elastic member 4 are collinear, thereby helping to ensure the balance of force on the moving lens barrel 2. In some embodiments, the first groove 123 is disposed in the third connecting portion 122, the second guide member 9 is disposed in the first connecting portion 21, and the sleeve 8 is connected to the second connecting portion 112.

[0067] Additionally, to facilitate sealing the first opening 1112, such as Figure 1 and Figure 4 As shown, in some embodiments, the endoscope zoom device further includes a sealing cover 10, which is connected to the second endoscope barrel 12 and the second connecting portion 112 respectively, and the sealing cover 10 covers the outer periphery of the first connecting portion 21 and the second connecting portion 112 to seal the first opening 1112.

[0068] In other words, this embodiment seals the first opening 1112 by setting a sealing cover 10, and at the same time, the first connecting part 21 and the second connecting part 112 are located inside the sealing cover 10, thereby achieving the sealing of the objective lens assembly formed by the movable lens barrel 2, the first lens barrel 11 and the second lens barrel 12.

[0069] To facilitate the connection of the sealing cap 10 to the second connecting part 112 and the second lens barrel 12, such as Figure 1 , Figure 5 and Figure 7 As shown, in some embodiments, the second lens barrel 12 is provided with the aforementioned third connecting portion 122, the third connecting portion 122 is provided with a first recess 124, and the second connecting portion 112 is provided with a second recess 1122. The first recess 124 and the second recess 1122 are both used to store adhesive so that the sealing cap 10 can be cured with the third connecting portion 122 and the second connecting portion 112 respectively.

[0070] like Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the sealing cap 10 has an inverted U-shaped structure, and the inner wall of the sealing cap 10 mates with the outer periphery of the third connecting portion 122 and the second connecting portion 112, respectively.

[0071] Furthermore, such as Figure 4 and Figure 7 As shown, in some embodiments, a notch 125 is provided at the connection between the second lens barrel 12 and the third connecting portion 122 to allow the sealing cap 10 to cover more of the second lens barrel 12, thus improving the sealing performance. In some embodiments, the sealing cap 10 has a first edge portion 101 and a second edge portion 102 at one end near the second lens barrel 12. The second edge portion 102 protrudes from the first edge portion 101 to form a stepped end face. During installation, the end face of the first edge portion 101 away from the second edge portion 102 is flush with the end face of the second lens barrel 12 away from the first lens barrel 11. The second edge portion 102 extends into the second mounting hole 121 of the second lens barrel 12, and a portion of the second edge portion 102 is inserted into the notch 125 of the third connecting portion 122. In addition, in some embodiments, the lens barrel body 111 is provided with a platform 1113 for abutting against the second edge portion 102.

[0072] In addition, to facilitate the connection between the fixed lens barrel 1 and the lens mount 20, and to simplify the manufacturing of the fixed lens barrel 1, such as... Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the fixed lens barrel 1 further includes a third lens barrel 13 connected to the end of the first lens barrel 11 that is away from the second lens barrel 12.

[0073] In other words, in this embodiment, the fixed lens tube 1 is divided into three separate lens tubes: the first lens tube 11, the second lens tube 12, and the third lens tube 13. The third lens tube 13 is connected to the end of the first lens tube 11 that is away from the second lens tube 12, so as to facilitate the connection of the end of the first lens tube 11 that is away from the second lens tube 12 to the lens base 20.

[0074] It should be noted that this embodiment does not limit the specific connection method between the first lens barrel 11 and the third lens barrel 13, as long as the connection between the two can be achieved. In some embodiments, the outer periphery of the third lens barrel 13 is clearance-fitted with the first mounting hole 1111 of the first lens barrel 11 and connected by adhesive. For example, in some embodiments, the outer periphery of the third lens barrel 13 is provided with a third groove for applying adhesive. After the third groove is coated with adhesive, the third lens barrel 13 is inserted into the first mounting hole 1111 of the first lens barrel 11 to achieve adhesive curing between the third lens barrel 13 and the first lens barrel 11.

[0075] Furthermore, such as Figures 1 to 4 As shown, in some embodiments, the endoscope zoom device further includes a mount 20 connected to the fixed endoscope tube 1, and the mount 20 is provided with a sensor 21.

[0076] It should be noted that this embodiment does not limit the specific connection method between the fixed lens barrel 1 and the lens mount 20, as long as the connection between the two can be achieved. For example Figure 4 As shown, in some embodiments, the lens mount 20 is provided with a third mounting hole 201. The outer periphery of the first lens barrel 11 and the outer periphery of the third lens barrel 13 are both provided in the third mounting hole 201. The lens mount 20 is provided with a second opening 202 that communicates with the third mounting hole 201 and penetrates the wall thickness of the lens mount 20 at the location corresponding to the third mounting hole 201. The second opening 202 extends along the axial direction of the lens mount 20 to one end of the lens mount 20 facing the first lens barrel 11. The second opening 202 is used to avoid the second connecting part 112, so that the second connecting part 112 can extend out from the second opening 202 and the first lens barrel 11 can be fitted into the third mounting hole 201 of the lens mount 20.

[0077] like Figure 4 As shown, in some embodiments, the two sidewalls of the second opening 202 are provided with a second chamfer 2021, so that after the outer periphery of the first lens barrel 11 and the third lens barrel 13 are fitted into the third mounting hole 201 of the lens mount 20, adhesive is applied from the second chamfer 2021 of the second opening 202 to ensure sealing.

[0078] It should be noted that in this embodiment, the lens mount 20 and the sensor 21 are fixed together to form a lens mount assembly. In some embodiments, the sensor 21 is fixed to the end of the lens mount 20 away from the fixed lens barrel 1. It is understood that the first lens barrel 11, the second lens barrel 12, the third lens barrel 13, and the movable lens barrel 2 form the objective lens assembly, and the lens mount assembly and the objective lens assembly form a complete optical imaging system, i.e., an image transmission assembly. It is understood that before image adjustment, the objective lens assembly and the lens mount assembly are assembled separately, and the objective lens assembly is fitted into the lens mount 20. Image adjustment is performed using a five-axis tooling. After the image adjustment of the objective lens assembly and the lens mount assembly is completed, the objective lens assembly and the lens mount assembly are then fixed together. For example, adhesive is applied to the second chamfer 2021 at the second opening 202 of the lens mount 20 to ensure sealing.

[0079] In addition to the aforementioned endoscope zoom device, this utility model also provides an endoscope that includes the endoscope zoom device disclosed in the above embodiments. For the structure of other parts of the endoscope, please refer to the prior art, which will not be described in detail here.

[0080] The key point of this embodiment is that the endoscope zoom device disclosed in any of the above embodiments is used so that the endoscope at least includes the beneficial effects of the endoscope zoom device.

[0081] It should also be noted that, in this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0082] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0083] The endoscopic zoom device and endoscope provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. An endoscope zoom device, characterized in that, include: Fixed lens tube (1); The movable lens tube (2) is slidably connected to the fixed lens tube (1); The first elastic element (3) is disposed between the first side of the movable lens tube (2) and the fixed lens tube (1); The second elastic element (4) is disposed between the second side of the movable lens tube (2) and the fixed lens tube (1). The first side and the second side are two sides of the movable lens tube (2) that are opposite to each other along its moving direction. The extension and retraction directions of the first elastic element (3) and the second elastic element (4) are the same as the moving direction. In the initial state, the first elastic element (3) and the second elastic element (4) are both in a compressed state. The traction member (5) is connected to the second elastic member (4) and is used to apply tension to the second elastic member (4) or release the second elastic member (4). When the traction member (5) applies the tension to the second elastic member (4), the second elastic member (4) is compressed in a direction away from the moving lens barrel (2).

2. The endoscope zoom device according to claim 1, characterized in that, The traction member (5) is connected to a first guide member (6) at one end near the movable lens barrel (2). The first guide member (6) abuts against the movable lens barrel (2). The second elastic member (4) is disposed between the first guide member (6) and the fixed lens barrel (1).

3. The endoscope zoom device according to claim 2, characterized in that, The fixed lens barrel (1) is connected to a guide tube (7), the traction member (5) is movably disposed inside the guide tube (7), and one end of the traction member (5) near the movable lens barrel (2) extends out of the guide tube (7), and the second elastic member (4) is disposed between the first guide member (6) and the guide tube (7).

4. The endoscope zoom device according to claim 3, characterized in that, The fixed lens tube (1) is connected to a sleeve (8), the first guide (6) is slidably sleeved inside the sleeve (8), the guide tube (7) is connected to the inner wall of the sleeve (8), and the second elastic member (4) is sleeved on the outer periphery of the traction member (5) and located inside the sleeve (8).

5. The endoscope zoom device according to any one of claims 1-4, characterized in that, The fixed lens tube (1) includes: The first lens tube (11) is slidably connected to the first lens tube (11); The second lens barrel (12) is connected to the first lens barrel (11). The first elastic member (3) is disposed between the second lens barrel (12) and the movable lens barrel (2). At least one of the second lens barrel (12) and the movable lens barrel (2) is provided with a first groove (123) for setting the first elastic member (3) and a second guide member (9) for guiding the extension and retraction of the first elastic member (3).

6. The endoscope zoom device according to claim 5, characterized in that, The first lens tube (11) includes: The lens barrel body (111) is provided with a first mounting hole (1111) and a first opening (1112). The first opening (1112) penetrates the wall thickness of the lens barrel body (111) and extends along the axial direction of the lens barrel body (111) to one end of the lens barrel body (111) facing the second lens barrel (12). The movable lens barrel (2) is slidably disposed in the first mounting hole (1111), and the movable lens barrel (2) is provided with a first connecting part (21) extending out of the first opening (1112). The first elastic member (3) is disposed between the second lens barrel (12) and the first connecting part (21). The second connecting part (112) is connected to the lens barrel body (111) and is located at one end of the first opening (1112). It is used to stop and limit the first connecting part (21) away from the second lens barrel (12). The second elastic member (4) is disposed between the first connecting part (21) and the second connecting part (112).

7. The endoscope zoom device according to claim 6, characterized in that, Also includes: The sealing cap (10) is connected to the second lens barrel (12) and the second connecting part (112) respectively, and covers the outer periphery of the first connecting part (21) and the second connecting part (112) to seal the first opening (1112).

8. The endoscope zoom device according to claim 5, characterized in that, The fixed lens tube (1) also includes a third lens tube (13) connected to the end of the first lens tube (11) away from the second lens tube (12).

9. The endoscope zoom device according to any one of claims 1-4, characterized in that, It also includes a lens mount (20) connected to the fixed lens barrel (1), and the lens mount (20) is provided with a sensor (21).

10. An endoscope, characterized in that, Includes the endoscope zoom device according to any one of claims 1-9.

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