A focal length adjusting device for optical endoscopes

Abstract

The utility model relates to medical instrument technical field, specifically disclose a kind of focal length adjusting device for optical endoscope, including pipeline, the end of pipeline connects pipe end, the inside one side of pipe end is installed two groups of lead groove, the inside one side of pipe end connects lens, the inside movement of pipe end is set up camera, the position of camera and lens is mutually corresponding, the inside one end of pipe end is fixedly installed support, drive component is set on support, the middle part of this drive component includes gear shifting assembly, drive component drives camera to carry out radial motion. By setting light source sensor, and along with the movement of camera, utilize baffle to shield light source sensor, to judge the gear of inside camera, so that surgical staff can accurately judge the position of lens and the distance of zooming in;Through light path shielding trigger signal, eliminate mechanical loss from principle, can tolerate tens of thousands of times of adjustment operation and repeated disinfection, greatly prolong the service life of endoscope.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a focal length adjustment device for an optical endoscope. Background Technology

[0002] A search revealed that patent number CN201920133454.4 discloses a focal length adjustment device for an optical endoscope, comprising a housing and a camera. A connecting rod is fixedly connected to the upper end of the housing, and a blind hole is provided at the lower end of the connecting rod. A sleeve is fixedly connected to the upper left side of the connecting rod through a through hole. A planar mirror is fixedly connected to the left opening of the sleeve, and a convex mirror is fixedly connected to the inner edge of the left opening of the sleeve. An annular block is fixedly connected to the camera, and the annular block is slidably connected to the inner side of the sleeve. A fixing rod is fixedly connected inside the blind hole. A T-shaped rod is slidably connected to the wall of the fixing rod through a mounting hole. A transmission rod is obliquely fixedly connected to the horizontal wall of the T-shaped rod, and a triangular slider is fixedly connected to the upper end of the transmission rod. This invention allows doctors to easily change the focal length of the endoscope during use, avoids oral mucus adhering to the camera, and ensures a clear camera image, which is beneficial for doctors to examine the patient's oral cavity.

[0003] The aforementioned patent has the advantage of improving the clarity of the camera image by changing the focal length of the endoscope and avoiding the adhesion of oral mucus to the camera. However, in actual use, the camera moves and thus changes the focal length, but it is difficult to accurately judge the focal length setting. Therefore, we propose a focal length adjustment device for optical endoscopes. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] This invention provides a focal length adjustment device for an optical endoscope, which can solve the problem of difficulty in judging the distance traveled by the camera. The specific solution is as follows:

[0006] An optical endoscope focal length adjustment device includes a pipe, the end of which is connected to a tube end. Two sets of guide grooves are installed on one side of the inner side of the tube end, and a lens is connected to one side of the inner side of the tube end. A camera is movably disposed inside the tube end, and the positions of the camera and the lens correspond to each other. A bracket is fixedly installed at one end of the inner side of the tube end, and a driving component is disposed on the bracket. The middle part of the driving component includes a setting component, and the driving component drives the camera to move radially.

[0007] As a preferred embodiment of this utility model, the driving component includes a miniature electric rod, the output end of which is connected to a push rod, the end of which is fixedly connected to a slide block, and a connecting arm is fixedly installed at the bottom of the slide block, with the bottom end of the connecting arm precisely connected to the top of the camera.

[0008] As a preferred embodiment of this utility model, the gear adjustment assembly includes a stabilizing rod, which is installed inside the tube end and positioned below the bracket. A sliding rod is fixedly installed at one end of the stabilizing rod, and three light source sensors are evenly installed on the sliding rod, each corresponding to a gear position of the camera's movement.

[0009] As a preferred embodiment of this utility model, a baffle plate is fixedly connected to the middle of the connecting arm, and a circular groove adapted to the slide rod is opened in the middle of the baffle plate, and the baffle plate is slidably connected on the slide rod.

[0010] As a preferred embodiment of this utility model, the inner sidewalls of the shielding plate are all fixedly connected to shielding plates. After the shielding plates move on the slide rod, they are opposite to the nearby light source sensor, thus shielding the light source sensor.

[0011] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0012] By setting up a light source sensor and using a blocking plate to block the sensor as the camera moves, the system can determine the camera's movement level, allowing surgeons to accurately determine the lens's position and zoom distance. By triggering a signal through light path blocking, mechanical wear is eliminated in principle, allowing the endoscope to withstand tens of thousands of adjustments and repeated disinfection, significantly extending its lifespan. The sensor is positioned along the movement trajectory, and the blocking plate moves synchronously with the camera to trigger the signal, eliminating the need for complex mechanical transmission adaptations.

[0013] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the pipe end of this utility model;

[0017] Figure 3 This is a schematic diagram of the camera connection structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the shielding plate of this utility model;

[0019] The accompanying figure is labeled as follows:

[0020] 1. Pipe; 2. Pipe end; 3. Lens; 4. Camera; 5. Guide groove; 6. Bracket; 7. Slide; 8. Connecting arm; 9. Shielding plate; 10. Light source sensor; 11. Push rod; 12. Slide rod; 13. Miniature electric rod; 14. Stabilizer; 15. Shielding plate. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0022] See Figures 1-4 This utility model provides a focal length adjustment device for an optical endoscope, including a pipe 1, with a tube end 2 connected to the end of the pipe 1. Two sets of guide grooves 5 are installed on one side of the inside of the tube end 2. A lens 3 is connected to one side of the inside of the tube end 2. A camera 4 is movably installed inside the tube end 2. The positions of the camera 4 and the lens 3 correspond to each other. A bracket 6 is fixedly installed at one end of the inside of the tube end 2. A driving component is provided on the bracket 6. The middle part of the driving component includes a setting component. The driving component drives the camera 4 to move radially.

[0023] The driving component includes a miniature electric rod 13, the output end of which is connected to a push rod 11, the end of which is fixedly connected to a slide block 7, and a connecting arm 8 is fixedly installed at the bottom of the slide block 7. The bottom end of the connecting arm 8 is precisely connected to the top of the camera 4.

[0024] The gear adjustment component includes a stabilizer bar 14, which is installed inside the tube end 2 and located below the bracket 6. A slide bar 12 is fixedly installed at one end of the stabilizer bar 14. Three light source sensors 10 are evenly installed on the slide bar 12, and the three light source sensors 10 correspond to the gear position of the camera 4 respectively.

[0025] The zoom system is equipped with three light source sensors 10 corresponding to three fixed positions (such as near focus, medium focus, and far focus). This retains the core advantages of the "light sensor + shielding plate" solution and further adapts to the clinical or industrial needs of endoscopes through precise positioning of multiple positions. It should be noted that the near focus is used to observe mucosal details or tiny cracks in the inner wall of the tube; the medium focus is the mainstream working position, balancing the field of view and details, and is suitable for large-area scanning; the far focus is used to observe the overall structure.

[0026] Three sensors lock onto these three settings respectively, avoiding blurry transition zones during adjustment. Doctors or operators can quickly switch to the preset clear imaging range, reducing the time cost of repeated fine-tuning.

[0027] A baffle plate 9 is fixedly connected to the middle of the connecting arm 8. A circular groove adapted to the slide rod 12 is opened in the middle of the baffle plate 9, and the baffle plate 9 is slidably connected on the slide rod 12.

[0028] The inner walls of the shielding plate 9 are all fixedly connected to shielding plates 15. After the shielding plates 15 move on the slide rod 12, they are opposite to the nearby light source sensor 10, blocking the light source sensor 10. Driven by the miniature electric rod 13, the slide 7 is moved. At this time, the connecting arm 8 at the bottom and the camera 4 move laterally, thereby adjusting the zoom of the endoscope.

[0029] Furthermore, a baffle 9 is provided on the connecting arm 8. This baffle 9 can cover the light sensor 10 on the surface of the slide bar 12. When the baffle 9 covers one of the light sensor 10, the microcontroller (not shown) allows medical staff to sense the location of the lens, facilitating judgment and subsequent diagnosis and treatment. The light sensor 10 and the baffle 9 do not have direct contact; the trigger signal is triggered only by the light path blocking. This eliminates mechanical wear in principle, allowing it to withstand tens of thousands of adjustment operations and repeated disinfection, significantly extending the endoscope's service life. Wear of mechanical structures may generate debris (such as metal powder or plastic particles), posing safety hazards when the endoscope enters the human body cavity (such as causing inflammation or interfering with imaging). The light-sensing solution has no physical friction, completely eliminating debris generation and meeting medical sterility standards.

[0030] It should be noted that the light source sensor 10 is a surface-mount transistor, and the overall module size can be controlled within 3mm×3mm×2mm, occupying less than 5% of the internal space of the endoscope, without affecting the layout of other core components.

[0031] By setting up a light source sensor 10 and using a blocking plate 15 to block the light source sensor 10 as the camera 4 moves, the operating position of the internal camera 4 can be determined, allowing the surgeon to accurately determine the position of the lens and the zoom distance. By triggering the signal through light path blocking, mechanical wear is eliminated in principle, and the endoscope can withstand tens of thousands of adjustment operations and repeated disinfection, greatly extending its service life. The sensor is arranged along the movement trajectory, and the blocking plate moves synchronously with the camera to trigger the signal, without the need for complex mechanical transmission adaptation.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The terms "first," "second," "third," "fourth," etc. (if present) 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 embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A focal length adjustment device for an optical endoscope, comprising a conduit (1), wherein one end of the conduit (1) is connected to a tube end (2), characterized in that: Two sets of guide slots (5) are installed on one side of the inside of the tube end (2). A lens (3) is connected to one side of the inside of the tube end (2). A camera (4) is movably installed inside the tube end (2). The positions of the camera (4) and the lens (3) correspond to each other. A bracket (6) is fixedly installed at one end of the inside of the tube end (2). A driving component is provided on the bracket (6). The middle part of the driving component includes a gear adjustment component. The driving component drives the camera (4) to move radially.

2. The focal length adjustment device for an optical endoscope as described in claim 1, characterized in that: The driving component includes a miniature electric rod (13), the output end of which is connected to a push rod (11), the end of which is fixedly connected to a slide (7), and a connecting arm (8) is fixedly installed at the bottom of the slide (7). The bottom end of the connecting arm (8) is precisely connected to the top of the camera (4).

3. The focal length adjustment device for an optical endoscope as described in claim 2, characterized in that: The gear adjustment assembly includes a stabilizer (14), which is installed inside the tube end (2) and located below the bracket (6). A slide bar (12) is fixedly installed at one end of the stabilizer (14), and three light source sensors (10) are evenly installed on the slide bar (12). The three light source sensors (10) correspond to the gear position of the camera (4) respectively.

4. The focal length adjustment device for an optical endoscope as described in claim 3, characterized in that: The middle part of the connecting arm (8) is fixedly connected to the shield plate (9), and the middle part of the shield plate (9) has a circular groove that matches the slide rod (12). The shield plate (9) is slidably connected to the slide rod (12).

5. The focal length adjustment device for an optical endoscope as described in claim 4, characterized in that: The inner sidewalls of the shielding plate (9) are all fixedly connected to shielding pieces (15). After the shielding piece (15) moves on the slide bar (12), it is opposite to the nearby light source sensor (10) and shields the light source sensor (10).

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