Drive unit and fundus camera

Abstract

This application discloses a driving device, belonging to the field of fundus camera technology. The coupling and drive motor of the driving device can be integrated into two mounting positions of a bracket, respectively. Therefore, during bracket manufacturing, the preset positional accuracy of the two mounting positions can be easily controlled. After the drive motor is fixed to the bracket, the output shaft is inserted into the second connecting hole of the coupling. Simultaneously, during bracket manufacturing, the preset positional accuracy of the drive screw's mounting position relative to the first and second mounting positions can also be controlled. Furthermore, while leaving an assembly gap between the first end of the drive screw and the first connecting hole of the coupling, the two sets of snap-fit ​​surfaces are engaged. Thus, after the drive motor and coupling are assembled, the first end of the drive screw can be inserted into the first connecting hole, eliminating the need for repeated adjustments to the assembly accuracy between the coupling and the screw, reducing the number of assembly parts and lowering assembly costs.

Description

Technical Field

[0001] This application relates to the field of fundus camera technology, and in particular to a driving device and a fundus camera. Background Technology

[0002] Fundus cameras are used in medical imaging to capture images of the human retina, enabling medical personnel to examine and diagnose eye diseases. With advancements in medical technology, fundus cameras have become increasingly miniaturized and automated. The optical system is integrated within the camera casing and moves within a specific range using mechanical structures. During image capture, a control program manages the optical system's movement to obtain clear and accurate fundus images. As public health awareness increases, the availability of low-cost, easy-to-use fundus cameras for home use and monitoring of fundus examinations could become a new industry trend. Addressing this real-world need, the popularization and development of home-use fundus cameras is of significant importance.

[0003] However, the assembly and debugging of various components (e.g., driving and driven components) in the current fundus camera's drive mechanism is quite complicated, which leads to large assembly errors during installation and affects the driving accuracy of the drive mechanism on the lens assembly. Summary of the Invention

[0004] This application provides a driving device and a fundus camera. It solves the problem of cumbersome assembly and debugging of the driving device in existing fundus cameras, leading to significant assembly errors during installation. The technical solution is as follows:

[0005] On one hand, a driving device is provided, the driving device comprising:

[0006] Brackets, couplings, drive components, drive screws, and transmission parts;

[0007] The coupling, the drive member, and the drive screw are all mounted on the bracket, and the coupling and the bracket are rotatably connected. The coupling has a first connecting hole and a second connecting hole arranged concentrically along a first direction. The output shaft of the drive member is inserted into the second connecting hole and is interference-fitted with the second connecting hole.

[0008] The inner wall of the first connecting hole has two first snap-fit ​​surfaces arranged opposite to each other. The first end of the drive screw is inserted into the first connecting hole and is in clearance fit with the first connecting hole. The first end of the drive screw has two second snap-fit ​​surfaces that are in contact with the two first snap-fit ​​surfaces. The second end of the drive screw is rotatably connected to the bracket.

[0009] The transmission component is sleeved on the drive screw and is connected to the drive screw in a transmission manner. The transmission component is used to connect the lens barrel assembly.

[0010] Optionally, the transmission component includes: a synchronously connected transmission element and a slider;

[0011] The transmission component is sleeved on the drive screw and threadedly connected to the drive screw, and the slider is connected to the lens barrel assembly.

[0012] Optionally, the slider has a groove extending along the first direction, at least a portion of the transmission member is detachably connected within the groove, and at least a portion of the drive screw is located within the groove.

[0013] Optionally, the extension direction of the drive screw is consistent with the extension direction of the slide groove.

[0014] Optionally, the side of the transmission member facing the inner wall of the slide groove is clearance-fitted with the inner wall of the slide groove.

[0015] Optionally, the slider has a first snap-fit ​​member fixed to the side wall of the slide groove, and the side of the transmission member has a second snap-fit ​​member that cooperates with the first snap-fit ​​member;

[0016] Wherein, after the first snap-fit ​​component and the second snap-fit ​​component snap together, the transmission component is connected to the slider.

[0017] Optionally, one of the first and second snap-fit ​​components is a snap-fit ​​protrusion, and the other of the first and second snap-fit ​​components is a snap-fit ​​groove.

[0018] Optionally, if the transmission member has the snap-fit ​​groove, the transmission member includes: two first transmission plates arranged along the first direction, and a second transmission plate fixed between the two first transmission plates;

[0019] The width of the cross-section of the second transmission plate is smaller than the width of the cross-section of the first transmission plate, and the outer side of the second transmission plate and the two first transmission plates facing the second transmission plate together form the snap-fit ​​groove.

[0020] Optionally, the slider has a weight-reducing groove extending along the first direction.

[0021] Optionally, the driving device further includes: two guide rods arranged side by side along the second direction, the extension direction of the guide rods being parallel to the first direction, the guide rods and the bracket being an integral structure, and the second direction being perpendicular to the first direction;

[0022] The transmission component is sleeved on the guide rod and slidably connected to the guide rod.

[0023] Optionally, the drive device further includes: two ball bearings mounted on the bracket, one ball bearing being sleeved on the first end of the drive screw and located on the side of the coupling opposite to the drive member, and the other ball bearing being sleeved on the second end of the drive screw.

[0024] On the other hand, a fundus camera is provided, the fundus camera comprising:

[0025] Lens tube assembly and drive mechanism;

[0026] The transmission component in the drive device is connected to the lens barrel assembly, and the drive device is any of the drive devices given above.

[0027] The beneficial effects of the technical solutions provided in this application include at least the following:

[0028] A drive device may include: a bracket, a coupling, a drive motor, a drive screw, and a transmission component. Since the coupling and drive motor in the drive device can be integrated into two mounting positions on the bracket, the preset positional accuracy of the two mounting positions can be easily controlled during bracket manufacturing. After the drive motor is fixed to the bracket, the output shaft of the drive motor is inserted into the second connecting hole of the coupling. Simultaneously, the drive screw in the drive device is also mounted on the bracket. During bracket manufacturing, the preset positional accuracy of the drive screw's mounting position relative to the first and second mounting positions can also be easily controlled. Furthermore, the first end of the drive screw and the first connecting hole of the coupling are fitted with two sets of snap-fit ​​surfaces while leaving an assembly gap. Thus, after the drive motor and coupling are assembled, the first end of the drive screw can be inserted into the first connecting hole of the coupling, eliminating the need for repeated adjustments to the assembly accuracy between the coupling and the screw, and also eliminating the need for other fasteners to fix the drive screw and coupling, reducing the number of assembly parts and lowering assembly costs. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a driving device provided in an embodiment of this application;

[0031] Figure 2This is an exploded schematic diagram of a driving device provided in an embodiment of this application;

[0032] Figure 3 This is an exploded schematic diagram of another driving device provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the structure of a coupling provided in an embodiment of this application from one perspective;

[0034] Figure 5 This is a schematic diagram of the structure of a coupling provided in an embodiment of this application from another perspective;

[0035] Figure 6 This is a cross-sectional view of a driving device provided in an embodiment of this application;

[0036] Figure 7 This is a cross-sectional view of a coupling provided in an embodiment of this application;

[0037] Figure 8 This is a schematic diagram of another driving device provided in an embodiment of this application;

[0038] Figure 9 This is a schematic diagram of another driving device provided in the embodiments of this application;

[0039] Figure 10 This is a top view of a driving device provided in an embodiment of this application.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0044] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , Figure 1 This is a schematic diagram of the structure of a driving device provided in an embodiment of this application. Figure 2 This is an exploded schematic diagram of a driving device provided in an embodiment of this application. Figure 3 This is an exploded schematic diagram of another driving device provided in an embodiment of this application. Figure 4 This is a schematic diagram of the structure of a coupling provided in an embodiment of this application from one perspective. Figure 5 This is a schematic diagram of the structure of a coupling provided in an embodiment of this application from another perspective. Figure 6 This is a cross-sectional view of a driving device provided in an embodiment of this application. Figure 7 This is a cross-sectional view of a coupling provided in an embodiment of this application. The drive device can be installed in a fundus camera to drive the lens assembly within the fundus camera. The drive device may include: a bracket 100, a coupling 200, a drive component 300, a drive screw 400, and a transmission component 500.

[0045] The coupling 200, driving element 300, and driving screw 400 in the drive device can all be mounted on the bracket 100, and the coupling 200 can be rotatably connected to the bracket 100. Here, the bracket 100 in the drive device may include a first part 110 and a second part 120 distributed along the first direction F1, and the first part 110 in the bracket 100 may have a first mounting position 111 and a second mounting position 112 arranged adjacent to each other.

[0046] The coupling 200 in the drive unit can be installed at the first mounting position 111 in the bracket 100 and rotatably connected to the bracket 100. The coupling 200 can have a first connecting hole 210 and a second connecting hole 220 that are opposite and concentrically arranged along the first direction F1. The output shaft of the drive member 300 can be inserted into the second connecting hole 220 and is interference-fitted with the second connecting hole 220. Here, the drive member 300 in the drive unit can be fixed at the second mounting position 112 in the bracket 100.

[0047] The inner wall of the first connecting hole 210 has two opposing first engaging surfaces 211. The first end 410 of the drive screw 400 in the drive device can be inserted into the first connecting hole 210 of the coupling 200 and is clearance-fitted with the first connecting hole 210. The first end 410 of the drive screw 400 can have two opposing second engaging surfaces 411, and the two second engaging surfaces 411 of the first end 410 respectively contact the two first engaging surfaces 412. The second end 420 of the drive screw 400 can be rotatably connected to the second part 120 of the bracket 100. Here, the first engaging surfaces 211 and the second engaging surfaces 411 can be flat or curved, and the embodiments of the present invention do not limit this. For example, when the first end of the drive screw 400 is clearance-fitted with the first connecting hole 210 of the coupling 200, the diameter of the first connecting hole 210 (i.e., the flat shaft hole) of the coupling 200 is 0.2 mm larger than the diameter of the drive screw 400 (i.e., the screw flat shaft), that is, the clearance on one side between the first end of the drive screw 400 and the first connecting hole 210 can be 0.1 mm.

[0048] The transmission component 500 in the drive device can be sleeved on and connected to the drive screw 400. The transmission component 500 in the drive device is used to connect the lens barrel assembly. For example, the output shaft 310 of the drive component 300 drives the coupling 200 to rotate, and then drives the drive screw 400 to rotate through the connection of the first engagement surface 211 and the second engagement surface 411.

[0049] In this embodiment, since the coupling 200 and the drive component 300 in the drive device can be integrated into the two mounting positions of the bracket 100 respectively, the preset position accuracy of the two mounting positions of the bracket 100 can be easily controlled during the processing of the bracket 100. Then, after the drive component 300 is fixed on the bracket 100, the output shaft 310 of the drive component 300 is inserted into the second connecting hole 220 of the coupling 200. At the same time, the drive screw 400 in the drive device is also mounted on the bracket 100. During the processing of the bracket 100, the preset position accuracy of the mounting position of the drive screw 400 relative to the first mounting position 111 and the second mounting position 112 can also be easily controlled. Furthermore, while reserving an assembly gap between the first end 410 of the drive screw 400 and the first connecting hole 210 of the coupling 200, two sets of snap-fit ​​surfaces are used for snap-fit. Thus, after the drive component 300 and the coupling 200 are assembled, the first end 410 of the drive screw 400 can be inserted into the first connecting hole 210 of the coupling 200. There is no need to repeatedly adjust the assembly accuracy between the coupling 200 and the drive screw 400, and there is no need for other fasteners to fix the drive screw 400 and the coupling 200, which reduces the number of assembly parts and lowers the assembly cost.

[0050] In summary, this application provides a driving device that may include: a bracket, a coupling, a drive motor, a drive screw, and a transmission component. Since the coupling and drive motor in the driving device can be integrated into two mounting positions on the bracket, the preset positional accuracy of the two mounting positions can be easily controlled during bracket manufacturing. After the drive motor is fixed to the bracket, its output shaft is inserted into the second connecting hole of the coupling. Simultaneously, the drive screw in the driving device is also mounted on the bracket. During bracket manufacturing, the preset positional accuracy of the drive screw's mounting position relative to the first and second mounting positions can also be easily controlled. Furthermore, the first end of the drive screw and the first connecting hole of the coupling have a pre-existing assembly gap, and two sets of snap-fit ​​surfaces are used for clamping. Thus, after the drive motor and coupling are assembled, the first end of the drive screw can be inserted into the first connecting hole of the coupling, eliminating the need for repeated adjustments to the assembly accuracy between the coupling and the screw. Additionally, no other fasteners are required to fix the drive screw and coupling, reducing the number of assembly parts and lowering assembly costs.

[0051] Optionally, the coupling 200 can be made of a plastic material composed of polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS), which can meet the rotational strength requirements while effectively reducing vibration and lowering the noise generated during the rotation of the coupling 200. The bracket 100 can be a structure made of polyoxymethylene (POM), which is lightweight, has good mechanical properties, stable chemical properties, and excellent wear resistance. Furthermore, the positioning accuracy of each component during processing is well controlled, ensuring high positional precision for all components mounted on the bracket 100.

[0052] In the embodiments of this application, please refer to Figure 8 and Figure 9 , Figure 8 This is a schematic diagram of another driving device provided in an embodiment of this application. Figure 9 This is a schematic diagram of another driving device provided in an embodiment of this application. The transmission component 500 may include a transmission member 510 and a slider 520 that are synchronously connected. The transmission member 510 may be sleeved on the drive screw 400 and threadedly connected to the drive screw 400. The slider 520 may be connected to the lens barrel assembly of the fundus camera. In this case, during the process of the driving member 300 controlling the rotation of the drive screw 400, the transmission member 510 and the slider 520 can be driven to move synchronously along the first direction F1. For example, the driving member 300 may be a drive motor or a cylinder.

[0053] For example, the slider 520 may have a groove 521 extending along a first direction F1, at least a portion of the transmission member 510 being detachably connected within the groove 521, and at least a portion of the drive screw 400 being located within the groove 521. In this case, by providing a groove 521 extending along the first direction F1 in the slider 520, the transmission member 510 can be directly placed within the groove 521 and synchronously connected with the slider 520 during the assembly process, simplifying the installation process of the transmission member 510 and the slider 520. Furthermore, by controlling the machining accuracy of the groove 521, the overall positional accuracy of the transmission member 510 and the drive screw 400 after assembly can be guaranteed. In addition, the groove 521 provides installation space for the drive screw 400, effectively reducing the overall size of the drive device.

[0054] It should be noted that in some embodiments, the extension direction of the drive screw 400 can be consistent with the extension direction of the slide groove 521. This makes the slotting direction of the slide groove 521 consistent with the extension direction of the drive screw 400, which not only facilitates the rotation of the drive screw 400 in the slide groove 521, but also facilitates the positioning of the drive screw 400 through the slide groove 521.

[0055] Optionally, the transmission component 510 can be made of polyoxymethylene (POM) material, which ensures a good mechanical connection between the transmission component 510 and the drive screw 400 and a long service life. The slider 520 can be made of a plastic material composed of polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS), which ensures the strength required for the synchronized movement of the slider 520 and the transmission component 510, while being lightweight and effectively reducing costs.

[0056] For example, when the transmission component 510 and the slider 520 are injection molded parts, by standardizing the technical parameters, the key dimension error is guaranteed to be within 0.05 mm and the important dimension error is within 0.1 mm, which can ensure the fitting accuracy of the transmission component 510 and the slider 520 during assembly.

[0057] In this embodiment, the inner side of the transmission component 510 facing the inner sidewall of the slide groove 521 can be clearance-fitted with the inner sidewall of the slide groove 521. This allows the transmission component 510 and the slide groove 521 to be directly inserted during assembly, avoiding mutual interference due to errors, effectively reducing assembly difficulty, and facilitating the detachable connection between the transmission component 510 and the slide groove 521.

[0058] Optional, such as Figure 8 and Figure 9As shown, the slider 520 may have a first engaging member 522 fixed to the side wall of the slide groove 521, and the transmission member 510 may have a second engaging member 511 that engages with the first engaging member 522 on its side. When the first engaging member 522 engages with the second engaging member 511, the transmission member 510 is connected to the slider 520. In this case, by fixing the first engaging member 522 to the side wall of the slide groove 521 and fixing the second engaging member 511 to the side of the transmission member 510, the synchronous connection between the slider 520 and the transmission member 510 can be achieved through the engagement of the first engaging member 511 and the second engaging member 522. This eliminates the need for bolts between the transmission member 510 and the slider 520, reducing the number of parts and lowering assembly costs. It should be noted that the slider 520 and the first engaging member 522 can be an integral structure, and the transmission member 510 and the second engaging member 511 can be an integral structure.

[0059] In the embodiments of this application, such as Figure 8 and Figure 9 As shown, one of the first snap-fit ​​member 522 and the second snap-fit ​​member 511 can be a snap-fit ​​protrusion, and the other of the first snap-fit ​​member 522 and the second snap-fit ​​member 511 can be a snap-fit ​​groove. In this case, the first snap-fit ​​member 522 and the second snap-fit ​​member 511 can be a mating connection with a protrusion and a concave shape. Thus, by ensuring the machining accuracy of the transmission member 510 and the slider 520, when the transmission member 510 and the slider 520 are connected, one can directly insert into the other, simplifying assembly. For example, the first snap-fit ​​member 522 can be a snap-fit ​​protrusion, and the second snap-fit ​​member 511 can be a snap-fit ​​groove. In other possible implementations, the first snap-fit ​​member 522 can also be a snap-fit ​​groove, and the second snap-fit ​​member 511 can be a snap-fit ​​protrusion.

[0060] Optional, please refer to Figure 9 and Figure 10 , Figure 10 This is a top view of a driving device provided in an embodiment of this application. When the transmission member 510 has a locking groove, the transmission member 510 may include: two first transmission plates 512 arranged along a first direction F1, and a second transmission plate 513 fixed between the two first transmission plates 512. The width of the cross-section of the second transmission plate 513 is smaller than the width of the cross-section of the first transmission plate 512, and the outer side of the second transmission plate 513 and the sides of the two first transmission plates 512 facing the second transmission plate 513 form a locking groove.

[0061] For example, the first transmission plate 512 and the second transmission plate 513 of the transmission component 510 can be integrally formed with high processing precision, which can ensure high-precision matching between the transmission component 510 and the slider 520.

[0062] In the embodiments of this application, such as Figure 9 and Figure 10 As shown, the locking groove of the transmission component 510 can be annular, which allows the operator to perform blind assembly and improves the assembly efficiency of the transmission component 510. When the locking groove in the transmission component 510 is an annular groove, the second transmission plate 513 can be fixed in the central area of ​​the two first transmission plates 512.

[0063] Optional, such as Figure 10 As shown, the slider 520 may have a weight-reducing groove C extending along the first direction F1. In this case, by setting the weight-reducing groove C, the overall weight of the slider 520 and the drive device can be effectively reduced. Thus, when the slider 520 and the transmission member 510 move synchronously along the drive screw 400, the wear of the threaded connection between the transmission member 510 and the drive screw 400 is reduced, and the lightweighting of the drive device can effectively control costs. For example, the extension direction of the weight-reducing groove C may be parallel to the first direction, or the extension direction of the weight-reducing groove C may be parallel to the second direction. This application embodiment does not specifically limit this. The number of weight-reducing grooves C may be one or more. When there are multiple weight-reducing grooves C, the multiple weight-reducing grooves C may be equally spaced along the first direction F1, or the multiple weight-reducing grooves C may be equally spaced along the second direction F2.

[0064] In the embodiments of this application, such as Figure 7 and Figure 9 As shown, the driving device may further include two guide rods 600 arranged side by side along the second direction F2. The extension direction of the guide rods 600 is parallel to the first direction F1. The guide rods 600 and the bracket 100 can be an integral structure, and the second direction F2 can be perpendicular to the first direction F1. The transmission component 500 is sleeved on the guide rods 600 and slidably connected to them. In this case, during the process of the driving component 300 controlling the rotation of the driving screw 400 to drive the transmission component 510 and the slider 520 to move synchronously back and forth along the first direction F1, the guide rods 600 can limit and guide the slider 520, ensuring the smoothness and accuracy of the movement of the transmission component 500.

[0065] Optional, such as Figure 9 As shown, the drive device may further include two ball bearings 700 respectively mounted on the bracket 100. One ball bearing 700 can be sleeved on the first end 410 of the drive screw 400 and located on the side of the coupling 200 away from the drive member 300, and the other ball bearing 700 can be sleeved on the second end 420 of the drive screw 400. In this way, the use of ball bearings 700 can support both ends of the drive screw 400 to ensure the installation accuracy of the drive screw 400, effectively reduce friction loss during the process of the drive member 300 controlling the rotation of the drive screw 400, and have high transmission efficiency.

[0066] In the embodiments of this application, such as Figure 10 As shown, the slider 520 in the transmission component 500 of the drive device may include two edge connecting blocks K1 and a middle connecting block K2. The middle connecting block K2 is located between the two edge connecting blocks K1 and can be fixedly connected to each of the two edge connecting blocks K1. The two edge connecting blocks K1 can be slidably connected to the two guide rods 600 respectively, and the middle connecting block K2 has a groove 521. Thus, using a slider with a relatively large width, composed of the two edge connecting blocks K1 and the middle connecting block K2, can provide stable support for the lens barrel assembly. For example, the width of the middle connecting block K2 along the second direction F2 can be smaller than the width of the edge connecting blocks K1 along the second direction F2, and the widths of the two edge connecting blocks K1 along the second direction F2 are the same. For example, the slider 520 can be rectangular.

[0067] Optional, such as Figure 10 As shown, the support 100 in the drive device may include a frame D1 and a base plate D2, with the frame D1 fixed to one side of the base plate D2. The transmission component 500 can be distributed within the area enclosed by the frame D1, which may have a first mounting position 111 and a second mounting position 112. The drive component 300 can be mounted on the outer side of the frame D1. Thus, by providing the interconnected frame D1 and base plate D2 in the support 100, the transmission component 500 can be installed within the area enclosed by the frame D1, resulting in a more compact structure for the drive device. Furthermore, the base plate D2 facilitates the installation of the drive device within the fundus camera while simultaneously providing support for the transmission component 500. For example, the base plate D2 in the support 100 may have anti-friction grooves on the side facing the transmission component 500. This reduces the friction between the transmission component 500 and the base plate D2 when the base plate D2 supports the transmission component 500, and simultaneously reduces the overall weight of the support, enabling a lightweight design for the drive device.

[0068] For example, such as Figure 10 As shown, the frame D1 in the bracket 100 may include two first sub-frames D11 arranged opposite each other along a first direction F1 and two second sub-frames D12 arranged opposite each other along a second direction F2, with the two first sub-frames D11 and the two second sub-frames D12 connected end to end. The first direction F1 may be perpendicular to the second direction F2. Thus, the frame D1, formed by multiple sub-frames, has good structural strength and can provide stable support for other components in the drive device.

[0069] It should be noted that, as Figure 10As shown, two adjacent first sub-borders D11 and second sub-borders D12 can be set vertically, so that the border D1 formed by the two first sub-borders D11 and the two second sub-borders D12 can be a rectangular border. It should be noted that this border can also be other shapes, such as trapezoidal.

[0070] In summary, this application provides a driving device that may include: a bracket, a coupling, a drive motor, a drive screw, and a transmission component. Since the coupling and drive motor in the driving device can be integrated into two mounting positions on the bracket, the preset positional accuracy of the two mounting positions can be easily controlled during bracket manufacturing. After the drive motor is fixed to the bracket, its output shaft is inserted into the second connecting hole of the coupling. Simultaneously, the drive screw in the driving device is also mounted on the bracket. During bracket manufacturing, the preset positional accuracy of the drive screw's mounting position relative to the first and second mounting positions can also be easily controlled. Furthermore, the first end of the drive screw and the first connecting hole of the coupling have a pre-existing assembly gap, and two sets of snap-fit ​​surfaces are used for clamping. Thus, after the drive motor and coupling are assembled, the first end of the drive screw can be inserted into the first connecting hole of the coupling, eliminating the need for repeated adjustments to the assembly accuracy between the coupling and the screw. Additionally, no other fasteners are required to fix the drive screw and coupling, reducing the number of assembly parts and lowering assembly costs.

[0071] This application also provides a fundus camera, which may include: a lens barrel assembly (not shown in the figure) and a driving device. A transmission component in the driving device can be connected to the lens barrel assembly, and the driving device can be any of the driving devices described above. For example, the driving device can drive the lens barrel assembly to move in order to take pictures of the fundus.

[0072] For example, in the case where the transmission component 500 in the drive device includes a transmission member 510 and a slider 520, the slider 520 can be connected to the lens barrel assembly in the fundus camera. In this way, when the output shaft 310 of the drive member 300 drives the drive screw 400 to rotate via the coupling 200, the drive screw 400 can drive the transmission member 510 and the slider 520 to move synchronously back and forth along a first direction, thereby adjusting the position of the lens barrel assembly.

[0073] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0074] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0075] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A driving device, characterized in that, include: Brackets, couplings, drive components, drive screws, and transmission parts; The coupling, the drive member, and the drive screw are all mounted on the bracket, and the coupling and the bracket are rotatably connected. The coupling has a first connecting hole and a second connecting hole arranged concentrically along a first direction. The output shaft of the drive member is inserted into the second connecting hole and is interference-fitted with the second connecting hole. The inner wall of the first connecting hole has two first snap-fit ​​surfaces arranged opposite to each other. The first end of the drive screw is inserted into the first connecting hole and is in clearance fit with the first connecting hole. The first end of the drive screw has two second snap-fit ​​surfaces that are in contact with the two first snap-fit ​​surfaces. The second end of the drive screw is rotatably connected to the bracket. The transmission component is sleeved on the drive screw and is connected to the drive screw in a driving connection. The transmission component is used to connect the lens barrel assembly.

2. The driving device according to claim 1, characterized in that, The transmission component includes: a synchronously connected transmission element and a slider; The transmission component is sleeved on the drive screw and threadedly connected to the drive screw, and the slider is connected to the lens barrel assembly.

3. The driving device according to claim 2, characterized in that, The slider has a groove extending along the first direction, at least a portion of the transmission member is detachably connected within the groove, and at least a portion of the drive screw is located within the groove.

4. The driving device according to claim 3, characterized in that, The extension direction of the drive screw is consistent with the extension direction of the slide groove.

5. The driving device according to claim 3, characterized in that, The side of the transmission component facing the inner wall of the slide groove is in clearance fit with the inner wall of the slide groove.

6. The driving device according to claim 3, characterized in that, The slider has a first snap-fit ​​member fixed to the side wall of the slide groove, and the side of the transmission member has a second snap-fit ​​member that cooperates with the first snap-fit ​​member. Wherein, after the first snap-fit ​​component and the second snap-fit ​​component snap together, the transmission component is connected to the slider.

7. The driving device according to any one of claims 2-6, characterized in that, The slider has a weight-reducing groove extending along the first direction.

8. The driving device according to any one of claims 1-6, characterized in that, The driving device further includes: two guide rods arranged side by side along the second direction, the extension direction of the guide rods being parallel to the first direction, the guide rods and the bracket being an integral structure, and the second direction being perpendicular to the first direction; The transmission component is sleeved on the guide rod and slidably connected to the guide rod.

9. The driving device according to any one of claims 1-6, characterized in that, The drive device further includes two ball bearings mounted on the bracket, one ball bearing being sleeved on the first end of the drive screw and located on the side of the coupling away from the drive member, and the other ball bearing being sleeved on the second end of the drive screw.

10. A fundus camera, characterized in that, include: A lens barrel assembly and a drive device, wherein a transmission component in the drive device is connected to the lens barrel assembly, and the drive device is the drive device according to any one of claims 1-9.

Images