A three-coordinate support platform of fundus camera and fundus camera

Abstract

The application relates to a three-coordinate supporting platform of a fundus camera and the fundus camera, and the three-coordinate supporting platform comprises a fixed base provided with three sliding tables capable of realizing three-coordinate movement, one of the three sliding tables is a lens barrel mounting sliding table, the lens barrel mounting sliding table is used as an output end of the three-coordinate supporting platform to fix and mount a lens barrel of the fundus camera, and a packing locking structure is used to lock the three sliding tables on the fixed base when the lens barrel mounting sliding table moves to a set packing position with the lens barrel to realize fundus camera packing, and the three sliding tables can be unlocked and released to realize fundus camera unpacking. The three sliding tables on the three-coordinate supporting platform are locked on the fixed base by the packing locking structure arranged on the three-coordinate supporting platform, so that the sliding tables are not free to slide any more, and then the lens barrel can be locked to realize fundus camera packing.

Description

Technical Field

[0001] This invention generally relates to the field of fundus camera technology. More specifically, this invention relates to a three-coordinate support platform for a fundus camera and a fundus camera. Background Technology

[0002] Currently, fundus cameras are commonly used to image the retina during fundus examinations to assess eye health. A fundus camera is an optical imaging device that uses white light to illuminate the retina, causing the fundus image to be projected onto a sensor and displayed on a screen, thus completing the fundus image capture. For example, the fundus camera disclosed in Chinese invention patent application CN112043237A moves the camera's barrel during image capture so that the lens is aligned with the pupil, ensuring proper operation. Existing fundus cameras typically use a three-coordinate support platform to support the lens barrel and allow for adjustment in the X-axis (anterior-posterior), Z-axis (left-right), and Y-axis (up-down).

[0003] Fundus cameras are precision devices, and their transportation and operation typically involve safety mechanisms and procedures. It's necessary to secure the motion system within the coordinate measuring machine (CMM) support platform to prevent unauthorized movement of internal components and ensure the integrity of the internal instruments. When the fundus camera is powered on, the CMM support platform must also function correctly to guarantee its operation. Conversely, when the fundus camera is powered off, the CMM support platform must be secured to prevent accidental movement and damage to any moving parts.

[0004] To address the aforementioned issues, a commonly used solution is the locking and unlocking method disclosed in the portable fundus camera in Chinese invention patent application CN113729619A. The fundus camera's imaging module is mounted on a three-degree-of-freedom motion module, and a locking and unlocking mechanism locks the imaging module in a predetermined position. This mechanism includes a first locking hole on the imaging module and a second locking hole on the housing, as well as a locking pin that can be inserted into the first locking hole through the second locking hole. The locking pin locks the fundus camera when inserted into the first locking hole of the imaging module and unlocks it when removed from the first locking hole. When packaging and transporting the camera, the three-degree-of-freedom motion module first drives the imaging module to the predetermined position. Then, the locking pin is inserted between the housing and the imaging module to lock the imaging module, preventing accidental movement and damage during transport. When transport is complete and the camera needs to be powered on, the locking pin is removed from the housing and the imaging module to release the lock. The three-degree-of-freedom motion module then drives the imaging module to move normally, completing the unpacking operation. However, this method of locking and unlocking directly affects the connection between the imaging module and the housing. This necessitates a matching through-hole design between the imaging module and the housing. Different models of fundus cameras require specially designed locking and unlocking mechanisms, leading to high design and manufacturing costs when there are many models and types of fundus cameras. Moreover, this manual installation and removal of the locking pin is not only cumbersome in practical applications, but also presents the risk of the locking pin being lost, making it inconvenient in actual use. Summary of the Invention

[0005] This invention provides a three-coordinate support platform for a fundus camera, solving the technical problem in the prior art where a locking pin is placed between the fundus camera's housing and imaging module, requiring specially designed locking and unlocking mechanisms for different fundus camera models. Furthermore, this invention also provides a fundus camera using the aforementioned three-coordinate support platform.

[0006] To address the aforementioned problems, the first aspect of this invention provides the following technical solution: a three-coordinate support platform for a fundus camera, comprising: a fixed base for fixing to the housing of the fundus camera, the fixed base having three sliding platforms capable of three-coordinate movement, one of which is a lens barrel mounting platform, the lens barrel mounting platform serving as the output end of the three-coordinate support platform for fixing and mounting the lens barrel of the fundus camera; and a packaging locking structure for locking the three sliding platforms on the fixed base when the lens barrel mounting platform moves with the lens barrel to a set packaging position to package the fundus camera, and for unlocking and releasing the three sliding platforms to unpack the fundus camera.

[0007] As a further improvement, the other two of the three slides are a first transition slide and a second transition slide. The first transition slide is reciprocally mounted on the fixed base, and the second transition slide is reciprocally mounted on the first transition slide. One of the first and second transition slides can slide in the front-back direction, and the other slide can slide in the left-right direction, so that the lens barrel mounting slide can be vertically mounted on the second transition slide in the up-down direction. The packaging locking structure includes a first locking structure and a second locking structure. The first locking structure is arranged between the fixed base and the second transition slide to lock the second transition slide and the first transition slide on the fixed base in the front-back and left-right directions when packaging the fundus camera. The second locking structure is used to lock the lens barrel mounting slide on the second transition slide in the up-down direction when packaging the fundus camera.

[0008] As a further improvement, the first locking structure includes a first locking pin extending in the vertical direction. The first locking pin is installed on one of the fixed base and the second transition slide, and the other has a first locking hole for inserting and removing the first locking pin. The first locking pin or the first locking hole can move up and down in the vertical direction. When the lens barrel mounting slide moves the lens barrel to the set packaging position, the first locking pin is vertically aligned with the first locking hole, so that the first locking pin is inserted into the first locking hole to lock the second transition slide and the first transition slide on the fixed base.

[0009] As a further improvement, the first locking pin or the first locking hole is driven to rise and fall by an electrically driven packaging device.

[0010] As a further improvement, the fixed base, the first transition slide, and the second transition slide are all horizontally extending base plates. The first transition slide and the second transition slide are stacked sequentially from bottom to top on the fixed base. The first locking pin is integrally or separately fixed on the power output part of the electric drive packaging device. The electric drive packaging device is fixedly installed on the second transition slide so that the second locking pin is disposed on the second transition slide.

[0011] As a further improvement, the electrically driven packing device has a packing position detection device, which outputs a signal when it detects that the first locking pin has descended and inserted into the first locking hole, so that the electrically driven packing device can control the first locking pin to stop descending.

[0012] As a further improvement, the second locking structure includes a second locking pin and a second locking hole, both extending along the reciprocating sliding direction of the second transition slide. One of the second locking pin and the second locking hole is disposed on the first transition slide or the second transition slide, and the other is disposed on the lens barrel mounting slide. When the lens barrel mounting slide moves with the lens barrel to the set packaging position, the second locking pin slides into the second locking hole to lock the lens barrel mounting slide on the second transition slide in the vertical direction.

[0013] As a further improvement, when one of the second locking pin and the second locking hole is provided on the first transition slide, a second electric drive mechanism for driving the second transition slide to reciprocate is provided between the first transition slide and the second transition slide, and the second transition slide has a locking position for engaging the second locking pin and the second locking hole during its reciprocating sliding stroke.

[0014] As a further improvement, a third electric drive mechanism for driving the lens mounting slide to reciprocate up and down is provided between the second transition slide and the lens mounting slide. The lens mounting slide has a lower limit position on the second transition slide during its reciprocating up and down stroke, so that the second locking pin and the second locking hole are aligned vertically.

[0015] As a further improvement, a second electric drive mechanism for driving the second transition slide to reciprocate is provided between the first transition slide and the second transition slide, and a third electric drive mechanism for driving the lens mounting slide to reciprocate up and down is provided between the second transition slide and the lens mounting slide. The lens mounting slide has a lower limit position that presses down on the second transition slide during its reciprocating up and down stroke. The first transition slide has an upper limit position, and the lens mounting slide has a lower push position. When the lens mounting slide is at the lower limit position, the second transition slide has a locking position during its reciprocating sliding stroke. The second transition slide in the locking position is used to move the lower push position to push the upper limit position upward to limit the upward sliding of the lens mounting slide.

[0016] As a further improvement, in the sliding direction of the second transition slide, the upper limit position has an upper opposing end facing the lower pushing part, and the lower pushing part has a lower opposing end facing the upper limit position. The upper opposing end has an upper guiding slope and / or the lower opposing end has a lower guiding slope, so that the lower opposing end can move below the upper opposing end and thus cause the lower pushing part to push the upper limit position upward.

[0017] As a further improvement, the packaging locking structure includes a locking pin and movable locking holes respectively provided on the three slides. The movable locking holes on the lens mounting slide are fastening mounting holes for detachable fastening connection with the locking pin. When the lens mounting slide drives the lens to move to the set packaging position, the three movable locking holes on the three slides are connected in a corresponding manner, and the locking pin is inserted into the three movable locking holes in one of the following ways to lock the three slides on the fixed base: (1) the locking pin is used to insert into the three movable locking holes through the adapter locking hole preset on the housing of the fundus camera; (2) the fixed base is provided with a fixed locking hole for corresponding connection with the three movable locking holes, and the locking pin is driven by an electrically driven packaging device to be inserted into the fixed locking hole and the three movable locking holes.

[0018] The second aspect of the present invention provides the following technical solution: a fundus camera, comprising: a housing having a three-coordinate support platform for any of the fundus cameras mentioned above; and a lens barrel fixedly mounted on a lens barrel mounting slide of the three-coordinate support platform.

[0019] The beneficial effects are as follows: In the fundus camera provided by this invention, when the lens barrel mounting slide moves the lens barrel to the designated packaging position, the packaging locking structure on the three-coordinate support platform locks the three slides on the three-coordinate support platform onto the fixed base, preventing the slides from sliding freely and thus locking the lens barrel, thereby achieving the packaging of the fundus camera. Furthermore, the three slides can be released again using the packaging locking structure to unpack the fundus camera. The entire packaging, locking, and unpacking process directly acts on the three slides, not on the lens barrel itself. This eliminates the need for additional locking holes on the lens barrel when using this type of three-coordinate support platform with different fundus camera lens barrels, improving the versatility of the three-coordinate support platform and reducing additional processing costs.

[0020] As one embodiment, the packing locking structure includes a first locking structure and a second locking structure. The first locking structure locks two transition slides that slide in the horizontal plane onto the fixed base, and the second locking structure locks the lens barrel mounting slide in the vertical direction. The first locking structure and the second locking structure lock different slides respectively, which simplifies the implementation of the packing locking structure to lock the three slides and can relatively reduce the accuracy of the first locking structure and the second locking structure.

[0021] As one embodiment, the first locking structure uses a combination of a first locking hole and a locking pin to lock the two transition slides onto the fixed base. This structure is simple and easy to implement. Furthermore, it is convenient to use both manual operation of the locking pin and electric drive packaging device to raise or lower the first locking pin or the first locking hole.

[0022] As another embodiment, the second locking structure employs a second locking pin and a second locking hole mating method, allowing for a relatively simple structure to lock the lens barrel mounting slide onto the second transition slide. Furthermore, by placing one of the second locking pin and the second locking hole on the first transition slide, it is convenient to use a second electric drive mechanism to move the second transition slide to the corresponding locking position, thereby achieving the mating of the second locking pin and the second locking hole. This eliminates the need for a separate device to drive the extension or retraction of the locking pin or locking hole, reducing costs and simplifying the internal structure.

[0023] In another embodiment, a third electric drive mechanism is used to drive the lens barrel mounting slide downwards and press against the second transition slide to determine the lower limit position of the lens barrel mounting slide. The second electric drive mechanism is then used to drive the second transition slide to the locking position so that the lower push part pushes the upper limit part upwards, thereby restricting the upward sliding of the lens barrel mounting slide. This achieves the limiting and locking of the lens barrel mounting slide in the vertical direction. In specific implementation, this method of using the lower push part to push the upper limit part upwards has relatively low requirements for the matching accuracy of the lower push part and the upper limit part. It has a simple structure and is easy to apply in actual production.

[0024] In another embodiment, the packaging locking structure uses locking pins that directly engage with the three movable locking holes on the three slides of the coordinate measuring machine support platform. Whether the locking pins are manually inserted from the outside of the fundus camera housing or driven by a corresponding electrically driven packaging device inside the fundus camera housing, the three slides can be locked in one go. This assembly method requires high precision in the movement of the three slides, ensuring that the three movable locking holes can be aligned and connected. Attached Figure Description

[0025] The above and other objects, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the present disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of a fundus camera provided by the present invention;

[0027] Figure 2 for Figure 1 A stereoscopic image from another angle taken by a fundus camera;

[0028] Figure 3 for Figure 1 A stereoscopic view from another angle, as shown by the fundus camera;

[0029] Figure 4 for Figure 1 Schematic diagram of the structure of the electric drive packaging device;

[0030] Figure 5 for Figure 4 The diagram shows the structure of the electrically driven packaging device when the first locking pin extends downwards.

[0031] Figure 6 This is a schematic diagram of the structure of another embodiment of the fundus camera provided by the present invention;

[0032] Figure 7 for Figure 6 A schematic diagram of the structure when the mounting slide of the middle mirror tube is in the lower limit position.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Fixed base; 2. First transition slide; 3. Second transition slide; 4. Lens barrel mounting slide; 5. Lens barrel; 6. First electric drive mechanism; 7. Second electric drive mechanism; 8. Third electric drive mechanism; 9. Electric drive packaging device; 10. First locking pin; 11. First locking hole; 12. Second locking pin; 13. Second locking hole; 14. Upper limit part; 140. Upper guide slope; 15. Lower push part; 16. Motor mounting plate; 17. First motor; 18. Second motor; 19. Third motor; 20. Front first baffle; 21. Rear first baffle; 22. Upper third baffle; 23. Lower third baffle; 24. Circuit board; 25. Mounting cylinder; 26. Mounting base; 27. First dual-channel photoelectric switch; 28. Second dual-channel photoelectric switch; 29. ​​Third dual-channel photoelectric switch; 30. Fourth dual-channel photoelectric switch. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] In response to the problem that setting locking pins between the housing and imaging module of a fundus camera requires separate design for different camera models, this invention specifically addresses this issue by directly implementing the packaging and locking mechanism on the three-coordinate support platform used to support the lens barrel. During use, since the lens barrel is fixedly mounted on the lens barrel mounting slide of the three-coordinate support platform, the effective locking of the lens barrel is achieved when the three slides on the three-coordinate support platform are locked to the fixed base using the packaging and locking structure. No special processing of the lens barrel and housing is required, making the three-coordinate support platform compatible with different models of fundus cameras. This eliminates the need for separate design and processing of the lens barrel and housing for different models of fundus cameras, effectively reducing the high design costs associated with different models of fundus cameras and making it suitable for industrial mass production.

[0037] After introducing the basic principles of the present invention, various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0038] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0039] The fundus camera provided by this invention includes a housing, within which a three-coordinate support platform is housed. A lens barrel, serving as an imaging module, is mounted on the three-coordinate support platform. The lens barrel, as the imaging module, internally houses an illumination component, a focusing component, a lens, and a sensor fixation component. The lens barrel can adopt the structure of existing fundus cameras, which will not be described in detail here. The output end of the three-coordinate support platform is a lens barrel mounting slide. The lens barrel is fixedly mounted on the lens barrel mounting slide, and the three-coordinate support platform drives the lens barrel to reciprocate in the front-back, left-right, and up-down directions. The front-back and left-right directions are horizontal, and the up-down direction is vertical. In use, the three-coordinate support platform drives the lens barrel to move, aligning it with the pupil of the subject, thereby enabling the imaging of the fundus for fundus examination.

[0040] The fundus camera provided by this invention is a further supplement and improvement to existing fundus cameras, mainly focusing on further improvements to the three-coordinate support platform on the fundus camera, as described below.

[0041] One assembly method for a coordinate measuring machine support platform and a lens barrel is as follows: Figures 1 to 3As shown, the coordinate measuring machine (CMM) support platform specifically includes a fixed base, a first transition slide 2, and a second transition slide 3 stacked sequentially from bottom to top. In other words, the first transition slide 2 is stacked on the fixed base 1, and the second transition slide 3 is stacked on the first transition slide 2. All three slides extend horizontally to form a horizontal base plate. The fixed base 1 is used to fix the fundus camera inside the housing, and can be detachably fixed to the housing by bolt connection. The first transition slide 2 is reciprocally slidable on the fixed base 1 in the front-back direction, and the second transition slide 3 is reciprocally slidable on the first transition slide 2 in the left-right direction. In addition, a lens barrel mounting slide 4 is also mounted vertically on the second transition slide 3. This lens barrel mounting slide 4 serves as the output end of the CMM support platform for fixing and mounting the horizontally extending lens barrel 5. Furthermore, a circuit board 24 is fixedly mounted on the top of the lens barrel mounting slide 4. By utilizing the relative sliding of three horizontal base plates and the lens barrel mounting slide 4, the position of the lens barrel 5 can be adjusted in the front-back, left-right, and up-down directions to ensure the normal operation of the fundus camera. Because the three slides are stacked sequentially in the up-down direction, combined with the design of placing the lens barrel mounting slide 4 on top, the height of the coordinate measuring machine support platform can be minimized, thereby effectively reducing the overall volume of the coordinate measuring machine support platform and facilitating the miniaturized design and assembly of the fundus camera.

[0042] Furthermore, in Figure 1 In the illustrated embodiment, a first electric drive mechanism 6 is provided between the fixed base 1 and the first transition slide 2. The first electric drive mechanism 6 drives the first transition slide 2 to reciprocate in the front-to-back direction, so that the first transition slide 2 drives the lens barrel mounting slide 4, carrying the lens barrel, to reciprocate in the front-to-back direction via the second transition slide 3. Furthermore, a second electric drive mechanism 7 is provided between the first transition slide 2 and the second transition slide 3. The second electric drive mechanism 7 drives the second transition slide 3 to reciprocate in the left-to-right direction, so that the second transition slide 3 can drive the lens barrel mounting slide 4, carrying the lens barrel 5, to reciprocate in the left-to-right direction. Additionally, a third electric drive mechanism 8 is provided between the second transition slide 3 and the lens barrel mounting slide 4, so that the third electric drive mechanism 8 drives the lens barrel mounting slide 4, carrying the lens barrel 5, to reciprocate in the up-down direction.

[0043] In such Figures 1 to 5 In the illustrated embodiment, the first electric drive mechanism 6, the second electric drive mechanism 7, and the third electric drive mechanism 8 all employ a stepper motor paired with a lead screw and nut mechanism to drive the corresponding slide table to reciprocate. In other embodiments, the first electric drive mechanism, the second electric drive mechanism, and the third electric drive mechanism may also employ an electric push rod mechanism to drive the corresponding slide table to reciprocate.

[0044] To facilitate the control of the positions of the first transition slide 2, the second transition slide 3, and the lens barrel mounting slide 4, corresponding position detection devices are provided for each of the three slides.

[0045] To detect the position of the first transition slide 2, a first position detection device is installed between the fixed base 1 and the first transition slide 2. For example... Figure 1 and Figure 2 As shown, the first position detection device specifically includes a first dual-channel photoelectric switch 27 and a front first baffle 20 and a rear first baffle 21 used in conjunction. The first dual-channel photoelectric switch 27 is fixedly installed on the outer side of one end of the first transition slide 2 in the left-right direction. The front first baffle 20 and the rear first baffle 21 are fixedly installed on the corresponding sides of the fixed base, and the front first baffle 20 and the rear first baffle 21 are spaced apart in the front-back direction. The first dual-channel photoelectric switch 27 has two sensing light paths set on one photoelectric switch. Corresponding to this dual-channel photoelectric switch, when the first transition slide 2 moves forward to a set limit position, the front sensing light path is blocked by the front first baffle 20, and the first dual-channel photoelectric switch 27 will output a corresponding signal to mark this position as the front reference position. When the first transition slide 2 moves backward to a set limit position, the rear sensing light path is blocked by the rear second baffle, and the first dual-channel photoelectric switch 27 will also output a corresponding signal to mark the corresponding position as the rear reference position. By pre-marking the front and rear reference positions, the forward and backward movement stroke of the first transition slide 2 can be determined. By using the first dual-channel photoelectric switch 27 in conjunction with the two first baffles, and by sending a command to the first motor 17 of the first electric drive mechanism 6, the first motor 17 can be driven to move the first transition slide 2 precisely to any position within the forward and backward movement stroke.

[0046] To facilitate timely monitoring of the left and right sliding position of the second transition slide 3, a second position detection device is installed between the first transition slide 2 and the second transition slide 3. For example... Figure 3In the illustrated embodiment, the second position detection device specifically includes a second dual-channel photoelectric switch 28 and two cooperating left and right second baffles. The second dual-channel photoelectric switch 28 is fixedly installed on the outer side of one end of the first transition slide 2 in the front-rear direction, specifically on the motor mounting plate 16 of the first transition slide 2. The left and right second baffles are fixedly installed on the corresponding sides of the second transition slide 3, and are spaced apart in the left-right direction. The second dual-channel photoelectric switch 28 has two sensing light paths on one photoelectric switch. Corresponding to this dual-channel photoelectric switch, when the second transition slide 3 moves to the left to a set limit position, the right sensing light path is blocked by the right second baffle, and the second dual-channel photoelectric switch 28 will output a corresponding signal to mark this position as the left reference position. When the second transition slide 3 moves to the right to a set limit position, the left sensing light path is blocked by the left second baffle, and the second dual-channel photoelectric switch 28 will also output a corresponding signal to mark the corresponding position as the rear reference position. By pre-marking the left and right reference positions, the left and right movement stroke of the second transition slide 3 can be determined. By using the second dual-channel photoelectric switch 28 in conjunction with the two second baffles, and by sending a command to the second motor 18 of the second electric drive mechanism 7, the second motor 18 can be driven to move the second transition slide 3 precisely to any position within the left and right movement stroke.

[0047] To facilitate timely monitoring of the vertical movement of the lens mounting slide 4, a third position detection device is installed between the lens mounting slide 4 and the second transition slide 3. Figure 3In the illustrated embodiment, the third position detection device specifically includes a third dual-channel photoelectric switch 29 and an upper third baffle 22 and a lower third baffle 23 used in conjunction. The third dual-channel photoelectric switch 29 is fixedly installed on the outer side of a vertical guide member of the second transition slide 3, and the upper third baffle 22 and the lower third baffle 23 are fixedly installed on the corresponding sides of the lens barrel mounting slide 4. Furthermore, the upper third baffle 22 and the lower third baffle 23 are spaced apart along the vertical direction. The third dual-channel photoelectric switch 29 has two sensing light paths on a single photoelectric switch. Corresponding to this dual-channel photoelectric switch, when the lens barrel mounting slide 4 moves upward to a set limit position, the lower sensing light path is blocked by the lower third baffle 23, and the third dual-channel photoelectric switch 29 outputs a corresponding signal, marking this position as the upper reference position. When the lens barrel mounting slide 4 moves downward to a set limit position, the upper sensing light path is blocked by the upper third baffle 22, and the third dual-channel photoelectric switch 29 also outputs a corresponding signal, marking the corresponding position as the lower reference position. By pre-marking the front and rear reference positions, the vertical lifting stroke of the lens barrel mounting slide 4 can be determined. Using the third dual-channel photoelectric switch 29 in conjunction with two third baffles, a command can be sent to the third motor 19 of the third electric drive mechanism, which can then drive the third motor 19 to precisely move the lens barrel mounting slide 4 to any position within its vertical lifting stroke.

[0048] In such Figures 1 to 3 In some embodiments shown, all three position detection devices employ a dual-channel photoelectric switch paired with two baffles to detect the position of the corresponding slide. In other embodiments, each position detection device may also use two sets of photoelectric switches in conjunction with two corresponding baffles, with the two sets of photoelectric switches spaced apart along the sliding direction of the corresponding slide to correspond one-to-one with the two baffles for marking the reference position of the corresponding slide. In still other embodiments, each position detection device may also employ position detection devices such as magnetic induction switches.

[0049] In practical implementation, the position detection device is combined with the stepper motor used in the electric drive mechanism, which is convenient and precise to control. This allows for easy control of the stepper motor's rotation speed and enables precise control of the corresponding slide's sliding speed and position.

[0050] As an embodiment of a three-coordinate support platform, Figure 1The first transition slide 2 can slide back and forth in the front-to-back direction, the second transition slide 3 can slide back and forth in the left-to-right direction, and the lens barrel mounting slide 4 can move up and down in the vertical direction. The first transition slide 2 and the second transition slide 3 serve as intermediate transition slides, ultimately enabling the lens barrel mounting slide 4 to move and adjust the lens barrel 5 in the front-to-back, left-to-right, and vertical directions. Here, the front-to-back, left-to-right, and vertical directions are perpendicular to each other, corresponding to the XYZ three-axis coordinate system, to achieve the reciprocating movement of the lens barrel mounting slide 4 in the three-axis directions.

[0051] In another embodiment, the first transition slide can slide in the left-right direction, while the second transition slide can slide in the front-back direction, and the lens barrel mounting slide can still be vertically mounted on the second transition slide. In yet another embodiment, the first transition slide can be vertically mounted, and one of the second transition slide and the lens barrel mounting slide can slide in the front-back direction while the other slides in the left-right direction. In other words, the first transition slide is vertically mounted on the fixed base, and the second transition slide can be horizontally mounted on the first transition slide, which can reciprocate horizontally. The lens barrel mounting slide can also reciprocate horizontally on the second transition slide. In yet another embodiment, the second transition slide can be vertically mounted, and one of the first transition slide and the lens barrel mounting slide can slide in the front-back direction while the other slides in the left-right direction. In specific implementations, the first transition slide can reciprocate horizontally on the fixed base, the second transition slide is vertically mounted on the first transition slide, and the lens barrel mounting slide can reciprocate horizontally on the second transition slide. Regardless of the implementation method, by having the three slides slide back and forth in the front-back, left-right, and up-down directions in a one-to-one correspondence, the mirror tube mounting slide, which serves as the output end of the coordinate measuring machine support platform, can ultimately achieve the reciprocating sliding of the front-back, left-right, and up-down directions.

[0052] The three-coordinate support platform allows for the reciprocating movement of the lens barrel in a three-coordinate orientation, ensuring the normal operation of the fundus camera. For the fundus camera to function normally, it needs to be in a normal operating state, at which point the lens barrel can move freely back and forth in a three-coordinate orientation. However, during transport, such as long-distance shipping or temporary relocation of the fundus camera, the lens barrel cannot be freely moved. It needs to be secured to prevent accidental damage caused by uncontrolled movement during transport; that is, the fundus camera needs to be packaged. After transport is completed and the camera is powered on for normal operation, it can be unpacked.

[0053] To facilitate the packaging and unpacking of the fundus camera, in such cases... Figures 1 to 3In the illustrated embodiment, a packaging locking structure is provided on the coordinate measuring machine (CMM) support platform. When the lens barrel mounting slide 4 moves the lens barrel 5 to the designated packaging position to package the fundus camera, the packaging locking structure locks the three slides on the CMM support platform onto the fixed base, and can unlock and release the three slides to unpack the fundus camera. In other words, regarding the CMM support platform, it can move the lens barrel 5 to the designated packaging position according to a preset control method, and the packaging locking structure locks the three slides to achieve packaging locking.

[0054] In practice, the position control of each slide of the coordinate measuring machine (CMM) support platform can be achieved by relying on the corresponding position detection device mentioned above, thereby accurately moving the lens barrel to the set packaging position.

[0055] exist Figures 1 to 3 In the illustrated embodiment, the packaging locking structure specifically includes a first locking structure and a second locking structure arranged separately. The first locking structure is positioned between the fixed base 1 and the second transition slide 3. During the packaging of the fundus camera, the first locking structure is used to lock the second transition slide 3 and the first transition slide 2 onto the fixed base 1 in both the front-back and left-right directions. The second locking structure, during the packaging of the fundus camera, is used to lock the lens barrel mounting slide 4 onto the second transition slide 3 in the vertical direction.

[0056] Specifically, the first locking structure includes a first locking pin 10 and a first locking hole 11 for mating insertion. For example... Figure 1 and Figure 2 As shown, an electrically driven packaging device 9 is fixedly installed on the second transition slide 3. A first locking pin 10 is integrally or separately fixed on the power output section of the electrically driven packaging device 9. The electrically driven packaging device 9 drives the first locking pin 10 to move up and down in the vertical direction, thereby allowing the first locking pin 10 to be mounted vertically on the second transition slide 3. Correspondingly, a locking cylinder is provided on the fixed base 1. This locking cylinder extends in the vertical direction, and its inner hole serves as a first locking hole 11 for the insertion and removal of the first locking pin 10.

[0057] In use, when the lens barrel mounting slide 4 moves the lens barrel 5 to the set packaging position, the first locking pin 10 and the first locking hole 11 are aligned in the vertical direction. The first locking pin 10 is driven to extend downward by the electric drive packaging device 9 and can be inserted into the first locking hole 11. In this way, the first transition slide 2 and the second transition slide 3 can be locked on the fixed base on the horizontal plane.

[0058] exist Figure 1 and Figure 2In the embodiment shown, both the first transition slide 2 and the second transition slide 3 slide freely in the horizontal direction. Therefore, when the first locking pin 10 extending in the vertical direction is inserted into the first locking hole 11, the first transition slide 2 and the second transition slide 3 can be locked simultaneously in the horizontal direction.

[0059] In specific implementation, it can be as follows: Figure 2 The first locking pin 10 is arranged on the second transition slide 3. In another embodiment, the first locking hole can also be arranged on the second transition slide, and the electric drive packaging device can be arranged on the fixed base. When the first locking hole corresponds to the first locking pin in the vertical direction, the electric drive packaging device can drive the first locking pin to extend upward to insert into the first locking hole. Alternatively, the first transition slide and the second transition slide can be locked on the fixed base in the horizontal plane.

[0060] The structure of the electrically driven packaging device 9 is as follows: Figure 4 and Figure 5 The device includes a mounting base 26, on which a lead screw motor is fixedly mounted. The lead screw motor directly drives the first locking pin 10 to move up and down in the vertical direction. Figure 4 As shown, the lead screw motor drives the first locking pin 10 to retract upwards, as... Figure 5 As shown, the lead screw motor drives the first locking pin 10 to extend downwards. Additionally, the electrically driven packaging device 9 also has a packaging position detection device. This device outputs a signal when it detects that the first locking pin 10 has inserted into the first locking hole 11, so that the electrically driven packaging device 9 can control the first locking pin 10 to stop descending. In a specific implementation, the packaging position detection device can employ a fourth dual-channel photoelectric switch 30 and matching upper and lower fourth baffles. The two fourth baffles are spaced apart on the mounting base 26 in the vertical direction. When the lead screw motor drives the first locking pin 10 to move up and down, the fourth dual-channel photoelectric switch 30 will move synchronously up and down, so that when detected by the upper and lower fourth baffles, it controls the lead screw motor to stop working and transmits a corresponding signal to the control circuit, facilitating the control circuit to control the operation of the electrically driven packaging device 9.

[0061] During assembly, the mounting base 26 is fixedly installed on the second transition slide 3. The specific installation position can be selected according to actual needs, and the present invention does not impose specific limitations.

[0062] exist Figure 5 In the illustrated embodiment, the electrically driven packaging device 9 employs a lead screw motor. Alternatively, the electrically driven packaging device may also employ an electric push rod. The present invention does not limit the specific structure of the electrically driven packaging device.

[0063] In some embodiments, the first locking pin 10 is integrally disposed on the power output portion of the electrically driven packaging device 9 and can be directly machined. In other embodiments, the first locking pin can also be separately fixedly installed on the power output portion of the electrically driven packaging device, for example, by means of threaded connection or welding connection to achieve separate assembly of the first locking pin.

[0064] like Figure 2 In some embodiments shown, the first locking pin 10 is raised and lowered by the electrically driven packaging device 9. In other embodiments, the first locking pin may be fixed in the vertical direction, and the first locking hole may be raised and lowered by the electrically driven packaging device. In other words, either the first locking pin or the first locking hole can move up and down, while the other can be fixed. As yet another embodiment, both the first locking pin and the first locking hole may be designed as structures that can extend and retract vertically; this invention does not limit this.

[0065] like Figure 3 In the embodiment shown, the second locking structure includes a second locking pin 12 and a second locking hole 13 for corresponding engagement. Both the second locking pin 12 and the second locking hole 13 extend along the reciprocating sliding direction of the second transition slide 3. Figure 3 The second locking pin 12 and the second locking hole 13 both extend in the left-right direction. Furthermore, the second locking pin 12 is fixed on the lens barrel mounting slide 4, while the second locking hole 13 is fixed on the first transition slide 2.

[0066] Specifically, since the second locking pin 12 is fixed on the lens barrel mounting slide 4, it can move up and down with the lens barrel mounting slide 4 under the drive of the third electric drive mechanism 8. When the lens barrel mounting slide 4 descends to its lower limit position, the second locking pin 12 can be aligned with the second locking hole 13 in the left-right direction. When the lens barrel mounting slide 4 moves the lens barrel 5 to the set packaging position, the second electric drive mechanism 7 drives the second transition slide 3 to move the lens barrel mounting slide 4 left and right so that the second locking pin 12 slides into the second locking hole 13, thereby locking the lens barrel mounting slide 4 on the second transition slide 3 in the up-down direction. In other words, when the second locking hole 13 is provided on the first transition slide 2, the second transition slide 3 has a locking position for the second locking pin 12 to mate with the second locking hole 13 during its reciprocating sliding stroke. In other words, the second transition slide 3 can be driven by the second electric drive mechanism 7 to move the lens barrel mounting slide 4 to the corresponding packaging position without the need for a separate drive device, which can save costs.

[0067] Regarding the second locking hole 13, the second transition slide 3 is generally shaped like a horizontal base plate. A motor mounting plate 16 extending vertically is fixed to one side of the second transition slide 3 in the front-rear direction. This motor mounting plate 16 is used to fix and mount the second motor 18 of the second electric drive mechanism 7. The second motor 18 is placed on one side of the motor mounting plate 16, and a locking cylinder is provided on the other side of the motor mounting plate 16. The inner hole of the locking cylinder forms the second locking hole 13. Moreover, to ensure normal operation, the second locking hole 13 and the second locking pin 12 are arranged facing each other to facilitate their insertion.

[0068] In addition, to facilitate the insertion of the second locking hole 13 and the second locking pin 12, an flared structure can be provided at the opening of the second locking hole 13, and the end of the second locking pin can be set into a tapered shape, which can relatively reduce the assembly accuracy of the entire three-coordinate support platform.

[0069] exist Figure 3 In the illustrated embodiment, the second locking pin 12 is disposed on the lens barrel mounting slide 4, and the second locking hole 13 is disposed on the first transition slide 2. In other embodiments, the second locking pin may be disposed on the first transition slide, while the second locking hole may be disposed on the lens barrel mounting slide. When the second electric drive mechanism drives the second transition slide to slide relative to the first transition slide in the left-right direction to the locking position, the second locking pin can also be inserted into the second locking hole to achieve upper and lower limit of the lens barrel mounting slide.

[0070] Figure 3 In this embodiment, the second locking hole 13 is arranged on the first transition slide 2. In some other embodiments, the second locking hole can also be arranged on the second transition slide, while the second locking pin is still fixed on the lens barrel mounting slide. When the lens barrel mounting slide descends to its position, the second locking pin and the second locking hole are aligned vertically. An electric drive mechanism is needed to drive the second locking pin or the second locking hole to extend horizontally, so that the second locking pin and the second locking hole can be inserted into each other, thereby locking the lens barrel mounting slide on the second transition slide in the vertical direction. As another implementation, the second locking pin can also be set on the second transition slide, while the second locking hole is set on the lens barrel mounting slide. Similarly, an electric drive mechanism is needed to drive the second locking pin or the second locking hole to extend and retract, so as to achieve the insertion of the two. In these solutions, an additional electric drive mechanism is required, which will increase the cost.

[0071] In addition, to facilitate the determination of the lower limit position of the lens barrel mounting slide 4, a third electric drive mechanism can be used. The lower limit position of the lens barrel mounting slide 4 is determined when the third electric drive mechanism 8 drives the lens barrel mounting slide 4 downwards and presses against the second transition slide 3. Based on this, the second locking pin 12 and the second locking hole 13 are designed to be aligned vertically. For example... Figure 3As shown, the lens barrel 5 mounting bracket has a mounting sleeve 25, which is used to fix and assemble the lens barrel 5. When the lens barrel mounting slide 4 descends to its lower limit position, the mounting sleeve 25 will descend and press against the second transition slide 3, which can hold the lens barrel mounting slide 4 in the lower limit position without damaging the lens barrel. Moreover, by using the cooperation of the second locking pin 12 and the second locking hole 13, the lens barrel mounting slide 4 can be locked in the lower limit position, preventing the lens barrel 5 mounting bracket with the lens barrel 5 from continuing to move freely in the vertical direction, and finally locking the lens barrel 5 mounting bracket on the second transition slide 3.

[0072] like Figures 1 to 3 In the embodiment shown, when the second electric drive mechanism 7 drives the second transition slide 3 to slide to the corresponding locking position, not only is the second locking pin 12 inserted into the second locking hole 13, but the first locking pin 10 and the second locking hole 13 are also in the same plane in the sliding direction of the first transition slide 2. Subsequently, the first electric drive mechanism 6 drives the first transition slide 2 to move, which can quickly align the first locking pin 10 and the first locking hole 11 vertically, making it convenient to achieve insertion and locking.

[0073] and Figure 3 The second locking structure shown is different from the one provided by the present invention. Figure 6 and Figure 7 In the embodiment of the second locking structure shown, an upper limit part 14 is provided on the first transition slide 2, and a lower push part 15 is provided on the lens barrel mounting slide 4. In the sliding direction of the second transition slide 3, the upper limit part 14 has an upper opposing end facing the lower push part 15, and the lower push part 15 has a lower opposing end facing the upper limit part 14. The upper opposing end has an upper guide slope 140, and the lower opposing end has a lower guide slope, so that the lower opposing end can move below the upper opposing end and thus cause the lower push part 15 to push the upper limit part 14 upward.

[0074] Similarly, the second motor 19 is fixedly installed on one side of the motor mounting plate 16 on the first transition slide 2, and the upper limit part 14 is fixedly arranged on the other side.

[0075] In other words, such as Figure 7As shown, when the lens barrel mounting slide 4 is moved to the lower limit position by the third electric drive mechanism 8 and pressed against the second transition slide 3, the mounting cylinder 25 of the lens barrel mounting slide 4 presses against the second transition slide 3. The second electric drive mechanism 7 drives the second transition slide 3 to slide the lens barrel mounting slide to the locking position. The locking position is located on the reciprocating sliding stroke of the second transition slide 3. The second transition slide 3 in the locking position can move the lower guide slope of the lower push part 15 to below the upper guide slope 140 of the upper limit part 14. When the lower push part 15 and the upper limit part 14 move towards each other, the lower push part 15 will push the upper limit part 14 upward, thereby restricting the upward sliding of the lens barrel mounting slide 4.

[0076] By utilizing the cooperation of the upper limit part 14 and the lower push part 15, the upward sliding of the lens barrel mounting slide 4 at the lower limit position can be restricted, thereby locking the lens barrel mounting slide 4 on the second transition slide 3 in the vertical direction.

[0077] exist Figure 6 and Figure 7 In the illustrated embodiment, the upper phase end of the upper limit position 14 has an upper guide slope 140, and the lower phase end of the lower pusher has a lower guide slope. In other embodiments, only the upper phase end may have an upper guide slope, or only the lower phase end may have a lower guide slope, to facilitate the lower pusher pushing the upper limit position upward.

[0078] In addition, Figure 3 and Figure 6 In the illustrated fundus camera embodiment, the second transition slide 3 is provided with clearance holes to avoid corresponding structures on the lens barrel mounting slide 4 and to avoid the second locking pin 12 and the lower push part 15, so that the second locking pin 12 and the lower push part 15 can move freely relative to the second transition slide 3 to ensure that they can be used normally in conjunction with the second locking hole 13 and the upper limit part 14.

[0079] As mentioned above Figures 1 to 5 When packing the fundus camera shown, please refer to the following packing process:

[0080] Step one: After the corresponding control circuit inside the fundus camera detects that the camera has completed taking pictures, it enters the packaging mode.

[0081] Step two: The third electric drive mechanism 8 drives the lens barrel mounting slide 4 to descend to the set position, so that the second locking pin 12 and the second locking hole 13 are aligned in the vertical direction.

[0082] Step three: Control the second electric drive mechanism 7 to drive the second transition slide 3, along with the lens barrel mounting slide 4 and the lens barrel 5, toward the second locking hole 13 until the second locking pin 12 is inserted into the second locking hole 13. This allows the lens barrel mounting slide 4 to be locked onto the second transition slide 3 in the vertical direction. It should be explained that since the lens barrel mounting slide 4 can only move relative to the second transition slide 3 in the vertical direction, when the second locking pin 12 and the second locking hole 13 are used to fix the lens barrel mounting slide 4 and the second transition slide 3 relative to each other, the lens barrel mounting slide 4 can be locked onto the second transition slide 3 in the front-back, left-right, and vertical directions.

[0083] Step four: The first electric drive mechanism 6 drives the first transition slide 2 to move the second transition slide 3 to the set position, so that the first locking pin 10 and the first locking hole 11 are aligned vertically.

[0084] Step 5: The electrically driven packaging device 9 drives the first locking pin 10 to engage with the first locking hole 11, thereby locking the first and second transition slides onto the fixed base 1 in the horizontal plane. It should be explained that since both the first and second transition slides 2 and 3 can only slide relative to the fixed base 1 in the horizontal plane, the engagement of the first locking pin 10 and the first locking hole 11 allows for horizontal positioning of the two transition slides, thus locking them onto the fixed base 1 from all directions.

[0085] When the second locking pin 12 and the second locking hole 13 are engaged, and the first locking pin 10 and the first locking hole 11 are engaged, the three slides of the entire coordinate measuring machine support platform can be locked relative to each other on the fixed base 1, so that the fundus camera is in a packaged and locked state, and all components inside the coordinate measuring machine support platform and the lens barrel 5 are in a rigidly fixed state. During transportation, there will be no accidental damage caused by shaking or displacement.

[0086] When the shipment arrives and the fundus camera needs to be turned on, please refer to the following unpacking process:

[0087] Step one: The control circuit system of the fundus camera receives the shooting command and starts the unpacking mode.

[0088] Step two, the electric drive packaging device 9 drives the first locking pin 10 to move upward to disengage from the first locking hole 11. At this time, the first transition slide 2 and the second transition slide 3 can slide freely in the horizontal plane.

[0089] Step 3: The second electric drive mechanism 7 drives the second transition slide 3 to slide, so that the second locking pin 12 disengages from the second locking hole 13. At this time, the lens barrel mounting slide 4 can slide freely in the up and down direction.

[0090] The packaging and locking structure can be used to unlock the three slides, complete the unpacking operation, and ensure that the fundus camera can be turned on and work normally.

[0091] At once Figure 6 and Figure 7 In the case of the fundus camera shown, during packaging, when the lens barrel mounting slide 4 descends to its lower limit position and the second transition slide 3 moves to its locked position, the lower pusher 15 on the lens barrel mounting slide 4 pushes the upper limit position 14 upward. This restricts the upward sliding of the lens barrel mounting slide 4 and locks it at its lower limit position, thus locking the lens barrel mounting slide 4 onto the second transition slide 3 in the vertical direction. During unpacking, the second electric drive mechanism 7 drives the second transition slide 3 out of the locked position, causing the lower pusher 15 to disengage from the upper limit position 14, allowing the lens barrel mounting slide 4 to move up and down normally.

[0092] like Figures 1 to 5 In the illustrated embodiment, corresponding to the first to third electric drive mechanisms and the electric drive packaging device, a first to fourth position detection device are configured to precisely control the positions of the three slides and the first locking pin. This facilitates seamless automatic packaging and unpacking operations when combined with the control circuit. Compared to the cumbersome manual packaging and unpacking operations, automatic packaging and unpacking are performed by the control circuit according to a preset fundus camera working mode, enabling convenient automatic control. The automatic packaging mode improves machine stability, effectively avoids damage from bumps during transportation, and significantly reduces the machine's damage rate. Furthermore, because it is seamless, users cannot perceive it, greatly reducing the difficulty of machine operation and facilitating its promotion and application.

[0093] In some embodiments provided above, the first locking structure uses a locking pin and a locking hole for insertion and engagement. In other embodiments, the first locking structure may also use a top-pressing locking method. In specific implementation, the electrically driven packaging device provided on the second transition slide can drive the second locking pin to move up and down, and a lower support top is provided on the fixed base. When packaging the fundus camera, the electrically driven packaging device drives the second locking pin to extend downward and press against the lower support top. By using a tight-fitting assembly method, the second transition slide and the first transition slide can be locked onto the fixed base.

[0094] Compared to the packaging locking structure described above, which includes a first locking structure and a second locking structure, in some embodiments, a single locking pin can be used to simultaneously lock three slides to the fixed base. In this embodiment, the packaging locking structure includes a locking pin that can be electrically driven to extend and retract. The packaging locking structure also includes movable locking holes on the first transition slide, the second transition slide, and the lens barrel mounting slide. Furthermore, the movable locking hole on the lens barrel mounting slide is a fastening mounting hole, used for detachable fastening connection with the locking pin.

[0095] Furthermore, the fixed base is provided with fixed locking holes that correspond to the three movable locking holes on the three slides. When the lens barrel mounting slide moves the lens barrel to the corresponding set packaging position, the three movable locking holes on the three slides are connected and aligned with the fixed locking holes on the fixed base. Then, the electrically driven packaging device drives the locking pin to insert into the fixed locking holes and the three movable locking holes, and detachably and securely connects with the movable locking holes on the lens barrel mounting slide, thereby locking the three slides onto the fixed base.

[0096] It should be noted that when the locking pin is detachably and securely connected to the movable locking hole on the lens barrel mounting slide, it is equivalent to locking the lens barrel mounting slide to the fixed base in the three coordinate orientation, and then the lens barrel mounting slide can be used to lock the two transition slides in turn.

[0097] The movable locking hole on the lens barrel mounting slide can be tightly fitted with a locking pin for detachable and fixed connection. Alternatively, a ring spring can be pre-installed in the movable locking hole on the lens barrel mounting slide, and an annular groove can be provided at the end of the locking pin. When the locking pin is inserted into the movable locking hole on the lens barrel mounting slide, the ring spring engages with the annular groove, achieving a tight connection and securing the package. When unpacking is required, the locking pin is forcibly pulled out of the movable locking hole on the lens barrel mounting slide by overcoming the resistance of the ring spring, and the ring spring will deform and disengage from the annular groove.

[0098] In this packaging locking structure, where the locking pin directly passes through the three movable locking holes on the three slides, when the fundus camera needs to be packaged and locked, the three slides are first slid accordingly to align the three movable locking holes with the fixed locking holes on the base, and then the locking pin is inserted into the four locking holes. When unpacking is needed, the locking pin is simply driven out of the three locking holes. This method is simple to control, as each slide is driven according to a preset program. However, because the locking pin is inserted into a large number of locking holes, the positional accuracy of each locking hole is relatively high, and there are also corresponding requirements for the length of the locking pin and the overall size of the fundus camera.

[0099] The electric drive packaging device that drives the locking pin can adopt a screw motor structure or an electric push rod structure, as long as it can drive the locking pin to extend and retract normally.

[0100] In some embodiments mentioned above, the present invention directly incorporates a packaging and locking structure on the coordinate measuring machine (CMM) support platform inside the fundus camera housing. This not only allows the CMM support platform to adapt to different types of lens tubes, but also, because the packaging and locking structure is located inside the housing, there is no need to drill holes in the fundus camera housing, which helps maintain the fundus camera's sealing performance and prevents internal instruments from being interfered with by the external environment.

[0101] This invention also provides a method for manually locking a coordinate measuring machine support platform:

[0102] For a coordinate measuring machine (CMM) support platform, a single locking pin can be used to lock all three slides to the fixed base simultaneously. In this embodiment, the packing locking structure includes a locking pin that can be inserted and removed by the operator from the outside of the fundus camera housing during packing. The packing locking structure also includes movable locking holes on the first transition slide, the second transition slide, and the lens barrel mounting slide. Furthermore, the movable locking hole on the lens barrel mounting slide is a fastening mounting hole for detachable and secure connection with the locking pin.

[0103] The housing has pre-set matching locking holes that align with the three movable locking holes on the three slides. When the lens barrel mounting slide moves the lens barrel to the corresponding set packaging position, the three movable locking holes on the three slides align with the matching locking holes on the fundus camera housing. At this time, the operator inserts the locking pin into the three movable locking holes through the pre-set matching locking holes on the housing, and detachably and securely connects it with the movable locking holes on the lens barrel mounting slides to lock the three slides onto the fixed base.

[0104] It should be noted that when the locking pin is detachably and securely connected to the movable locking hole on the lens barrel mounting slide, it is equivalent to locking the lens barrel mounting slide to the fixed base in the three coordinate orientation, and then the lens barrel mounting slide can be used to lock the two transition slides in turn.

[0105] The movable locking hole on the lens barrel mounting slide can be threaded onto a locking pin or fitted into it with a locking pin, both methods allowing for detachable and secure connection. Alternatively, a ring spring can be pre-installed within the movable locking hole on the lens barrel mounting slide, with an annular groove at the end of the locking pin. When the locking pin is inserted into the movable locking hole, the ring spring engages with the annular groove, securing the locking pin for packaging. To unpack, the locking pin can be forcibly pulled out of the movable locking hole on the lens barrel mounting slide, overcoming the resistance of the ring spring; the ring spring will then deform and disengage from the annular groove.

[0106] In the aforementioned packaging and locking structure, where the locking pins directly penetrate the three movable locking holes of the three slides, when the fundus camera needs to be packaged and locked, the three slides are first slid accordingly, aligning the three movable locking holes with the matching locking holes on the housing. At this point, the lens barrel mounting slide moves the lens barrel to the designated packaging position to package the fundus camera. The operator then inserts the locking pins into the four locking holes from the outside of the housing. When unpacking is required, the operator manually pulls the locking pins out of the four locking holes. This method is simple to control; the slides are driven according to a preset program. However, because the locking pins are inserted into a large number of locking holes, the positional accuracy of each locking hole is relatively high.

[0107] In the aforementioned method of manually inserting the locking pin into the housing, the three slides of the coordinate measuring machine (CMM) support platform are locked onto the fixed base, allowing for reverse locking of the lens barrel using the CMM support platform. Furthermore, this CMM support platform is suitable for assembling different types of lens barrels, eliminating the need for additional locking holes on the lens barrel and preventing interference with its operation, thus improving the versatility of the CMM support platform.

[0108] The present invention also provides an embodiment of a three-coordinate support platform for a fundus camera. The structure of the three-coordinate support platform in this embodiment is the same as that in any of the fundus camera embodiments described above, and will not be described in detail here.

[0109] The three-coordinate support platform provided by this invention has a built-in packaging and locking structure, which makes it easy to match with the lens barrels of different models of fundus cameras. No further drilling is required on the lens barrels. The three-coordinate support platform itself can meet the packaging and unpacking requirements of fundus cameras.

[0110] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," or "lateral," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0111] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise expressly and specifically defined.

[0112] While various embodiments of the invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and essence of the invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in the practice of the invention. The appended claims are intended to define the scope of the invention and therefore cover any modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. A three-coordinate support platform for a fundus camera, characterized by, The application relates to a fixing base for fixing on a shell of an eye fundus camera, wherein three slide tables capable of three-coordinate movement are arranged on the fixing base, one of the three slide tables is a lens barrel mounting slide table, and the lens barrel mounting slide table is used for fixing and mounting a lens barrel of the eye fundus camera as an output end of a three-coordinate supporting platform. A packing locking structure is arranged on the lens barrel mounting slide table, and the packing locking structure is used for locking the three slide tables on the fixing base when the lens barrel mounting slide table moves to a set packing position to realize eye fundus camera packing, and the packing locking structure can be unlocked to release the three slide tables to realize eye fundus camera unpacking. The other two slide tables of the three slide tables are a first transition slide table and a second transition slide table, the first transition slide table is reciprocally movably arranged on the fixing base, the second transition slide table is reciprocally movably arranged on the first transition slide table, one of the first transition slide table and the second transition slide table can slide in the front-rear direction, the other one can slide in the left-right direction, and the lens barrel mounting slide table is liftably arranged on the second transition slide table in the up-down direction. The packing locking structure comprises a first locking structure and a second locking structure. The first locking structure is arranged between the fixing base and the second transition slide table, and is used for locking the second transition slide table and the first transition slide table on the fixing base in the front-rear direction and the left-right direction when the eye fundus camera is packed. The second locking structure is used for locking the lens barrel mounting slide table on the second transition slide table in the up-down direction when the eye fundus camera is packed. The first locking structure comprises a first locking pin extending in the up-down direction, one of the fixing base and the second transition slide table is provided with the first locking pin, and the other one is provided with a first locking hole for inserting and pulling out the first locking pin. The first locking pin or the first locking hole can lift in the up-down direction, the first locking pin is aligned with the first locking hole in the up-down direction when the lens barrel mounting slide table moves to the set packing position with the lens barrel, and the first locking pin is inserted into the first locking hole to lock the second transition slide table and the first transition slide table on the fixing base.

2. The three-coordinate support platform for fundus cameras according to claim 1, characterized in that, The first locking pin or the first locking hole is driven to lift by an electric driving packing device.

3. The three-coordinate support platform for fundus cameras according to claim 2, characterized in that, The fixing base, the first transition slide table and the second transition slide table are horizontal base plates extending horizontally, the first transition slide table and the second transition slide table are arranged on the fixing base in sequence from bottom to top, the first locking pin is integrally or separately arranged on a power output part of the electric driving packing device, and the electric driving packing device is fixedly arranged on the second transition slide table, so that the first locking pin is arranged on the second transition slide table.

4. The three-coordinate support platform for fundus cameras according to claim 3, characterized in that, The electric driving packing device is provided with a packing position detection device, which outputs a signal when the first locking pin is detected to be inserted into the first locking hole, so that the electric driving packing device controls the first locking pin to stop descending.

5. The three-coordinate support platform for fundus cameras according to claim 4, characterized in that, ​ 6. The three-coordinate support platform of a fundus camera according to any one of claims 1 to 5, characterized in that, The second locking structure comprises a second locking pin and a second locking hole, both extending along the reciprocating sliding direction of the second transition sliding table, one of the second locking pin and the second locking hole is arranged on the first transition sliding table or the second transition sliding table, and the other is arranged on the lens barrel mounting sliding table, when the lens barrel mounting sliding table moves to the set packing position with the lens barrel, the second locking pin slides and inserts into the second locking hole to lock the lens barrel mounting sliding table on the second transition sliding table in the up-down direction.

7. The three-coordinate support platform for fundus cameras according to claim 6, characterized in that, When one of the second locking pin and the second locking hole is arranged on the first transition sliding table, a second electric driving mechanism for driving the second transition sliding table to reciprocate is arranged between the first transition sliding table and the second transition sliding table, and the second transition sliding table has a locking position for the insertion of the second locking pin and the second locking hole in its reciprocating sliding stroke.

8. The three-coordinate support platform for fundus cameras according to claim 7, characterized in that, A third electric driving mechanism for driving the lens barrel mounting sliding table to reciprocate is arranged between the second transition sliding table and the lens barrel mounting sliding table, and the lens barrel mounting sliding table has a lower limit position pressed on the second transition sliding table in its reciprocating lifting stroke to align the second locking pin and the second locking hole up and down.

9. The three-dimensional support platform for fundus cameras according to any one of claims 1 to 5, characterized in that, A second electric driving mechanism for driving the second transition sliding table to reciprocate is arranged between the first transition sliding table and the second transition sliding table, and a third electric driving mechanism for driving the lens barrel mounting sliding table to reciprocate is arranged between the second transition sliding table and the lens barrel mounting sliding table, the lens barrel mounting sliding table has a lower limit position pressed on the second transition sliding table in its reciprocating lifting stroke, the first transition sliding table is provided with an upper limit position part, and the lens barrel mounting sliding table is provided with a lower pushing part, when the lens barrel mounting sliding table is at the lower limit position, the second transition sliding table has a locking position in its reciprocating sliding stroke, and the second transition sliding table at the locking position is used to move the lower pushing part to the position of upwardly pushing the upper limit position part to limit the upward sliding of the lens barrel mounting sliding table.

10. The three-coordinate support platform for fundus cameras according to claim 9, characterized in that, In the reciprocating sliding direction of the second transition sliding table, the upper facing end of the upper limit position part faces the lower facing end of the lower pushing part, the upper facing end has an upper guide slope and / or the lower facing end has a lower guide slope, so as to facilitate the movement of the lower facing end below the upper facing end and in turn push the upper limit position part upwardly.

11. A fundus camera, characterized by: Comprise: a housing, which is internally provided with a three-coordinate support platform of the fundus camera as claimed in any one of claims 1 to 10; and a lens barrel, which is fixedly mounted on the lens barrel mounting sliding table of the three-coordinate support platform.

Images