A multi-lens switching device

Abstract

The utility model discloses a kind of multi-objective switching devices, the device includes: suspension seat, carousel, direct drive motor of driving carousel rotation and fine adjustment mechanism, fine adjustment mechanism includes multiple fine adjustment units, each fine adjustment unit is installed on the corresponding objective lens installation area of carousel, wherein, each fine adjustment unit includes: first adjustment plate, movably set on carousel;Second adjustment plate, for carrying objective lens, and movably set on the first adjustment plate;First adjusting assembly, for driving first adjustment plate to fine adjustment along first direction relative to the carousel;Second adjusting assembly, for driving second adjustment plate to fine adjustment along second direction perpendicular to first direction relative to the first adjustment plate Solve the problem that objective lens installation position precision is low in prior art, rotation bounce is big and load is insufficient when hanging.

Description

Technical Field

[0001] This utility model relates to the field of objective lens switching technology, and in particular to a multi-objective lens switching device. Background Technology

[0002] In existing technologies, multi-objective switching devices generally employ a stepper motor-driven rotary disk structure, with objectives fixed to the disk surface via mounting holes. The rotary disk typically has only five objective mounting positions, relying on photoelectric sensors as limit points in conjunction with a magnetic encoder to achieve closed-loop control. However, this design faces significant challenges in practical applications. The limited number of objectives mounted on the rotary disk makes it difficult to meet the needs of scenarios requiring frequent switching between multiple magnifications or high-precision, complex observations. For example, in ultra-precision inspection or high-magnification microscopy, users often require a wider variety of objectives to adapt to different sample characteristics. The objective mounting accuracy is entirely dependent on the rotary disk's machining tolerances; accumulated errors during manufacturing and assembly cannot be compensated for through structural design. This results in objective positioning deviations being significantly amplified during high-magnification observation, severely impacting image clarity and measurement reliability. The rotating mechanism uses a ball bearing support system, which is prone to axial runout and radial wobble during switching, disrupting motion stability and causing objective positioning instability, which in turn leads to image jitter or focusing failure. In terms of structural layout, the limited space above the rotation axis and the overall design's large axial dimension prevent the direct installation of standard-sized direct-drive motors, severely restricting the choice of drive scheme. Especially in suspended applications, the direct-drive motor must be installed upside down, leading to a sharp decrease in its axial load-bearing capacity. This results in an inability to effectively support the weight of the objective lens assembly and the rotating disk, making it prone to support failure and positioning misalignment during long-term operation, severely limiting the stability and lifespan of the device. These shortcomings collectively limit the applicability of existing technology in high-end microscopy equipment. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model provides a multi-objective switching device to solve the problems of low installation accuracy of traditional objectives, large runout during rotation, and insufficient load when suspended.

[0004] This utility model is achieved using the following technical solution: A multi-objective switching device, comprising: Hanging mount; A direct drive motor, the top of which is fixedly connected to the suspension mount, the direct drive motor including a spindle; A turntable is used to connect to the spindle so as to drive it to rotate by the direct drive motor. The turntable has multiple objective lens mounting areas along the circumference. The fine-tuning mechanism includes multiple fine-tuning units, each of which is mounted on the turntable in a corresponding objective lens mounting area. Each fine-tuning unit includes: A first adjustment plate is movably mounted on the turntable; The second adjustment plate is used to support the objective lens and is movably disposed on the first adjustment plate; A first adjustment component is used to drive the first adjustment plate to make fine adjustments relative to the turntable along a first direction; The second adjustment component is used to drive the second adjustment plate to make fine adjustments relative to the first adjustment plate along a second direction perpendicular to the first direction.

[0005] Furthermore, it also includes a gravity balancing mechanism, which comprises: An elastic part, which is vertically arranged and used to provide the elastic force required to balance gravity, is connected at its upper end to the suspension seat; The balance seat is connected to the turntable; A bearing housing is disposed within the balance seat and is threadedly connected to the balance seat; A bearing is disposed within the bearing housing and is connected to the lower end of the elastic portion; The rotating operating part is connected to the bearing housing. The tension of the elastic part can be adjusted by rotating the operating part to move the bearing seat axially within the balance seat.

[0006] Furthermore, the gravity balancing mechanism also includes: The upper hook is mounted on the suspension seat; The lower hook is installed on the bearing; An end cap, disposed on the end face of the bearing housing and used to press the bearing into the bearing housing. The upper end of the elastic part is connected to the upper hook, the lower end of the elastic part is connected to the lower hook, and the rotating operating part is mounted on the end cap.

[0007] Furthermore, the fine-tuning unit also includes: A first adjustable fastening assembly includes a first fastener and a first adjustment elongated hole formed on the first adjustment plate. The first fastener passes through the first adjustment elongated hole and is connected to the turntable. The first adjustment elongated hole extends along a first direction. A first elastic clamping mechanism is disposed between the first adjusting plate and the turntable; The first elastic clamping mechanism is configured to apply a force to the first adjusting plate when the first fastener is loosened, so that the first adjusting plate tends to press against the turntable. The first adjustment elongated hole is configured such that when the first fastener is loosened, the first adjustment plate is allowed to remain in contact with the turntable under the action of the first elastic clamping mechanism, and can be finely adjusted relative to the turntable along the first direction.

[0008] Furthermore, the first elastic clamping mechanism includes a first guide post, a first elastic element, and a first transmission element; The first guide post is mounted on the turntable and has a first axial inner hole inside it; The first elastic element is sleeved outside the first guide post and compressed between the head of the first guide post and the mounting surface of the turntable; The rod portion of the first transmission member passes through the second adjustment elongated hole on the first adjustment plate, and its end is inserted into the first axial inner hole of the first guide post, so that the head of the first transmission member presses the first adjustment plate against the turntable.

[0009] Further, the first adjustment component includes: The first adjusting component has an external thread on its rod. The limiting block is connected to the turntable. A first spring is sleeved on the rod portion of the first adjusting member; The first adjusting member passes through the limiting block and the first spring in sequence and is threadedly connected to the threaded hole on the first adjusting plate. When the first spring is compressed, its two ends abut against the first adjusting plate and the limiting block, respectively. By rotating the first adjusting member, the first adjusting plate can be driven to move slightly relative to the turntable along the extension direction of the first adjusting hole.

[0010] Furthermore, the fine-tuning unit also includes: The second adjustable fastening assembly includes a second fastener and a third adjustment elongated hole formed on the second adjustment plate. The second fastener passes through the third adjustment elongated hole and is connected to the first adjustment plate. The third adjustment elongated hole extends along a second direction. The second elastic clamping mechanism is disposed between the first adjusting plate and the second adjusting plate; The second elastic clamping mechanism is configured to apply a force to the second adjusting plate when the second fastener is loosened, so that the second adjusting plate tends to press against the first adjusting plate. The third adjustment hole is configured such that when the second fastener is loosened, the second adjustment plate is allowed to remain in contact with the first adjustment plate under the action of the second elastic clamping mechanism, and can be finely adjusted relative to the first adjustment plate along the second direction.

[0011] Furthermore, the second elastic clamping mechanism includes a second guide post, a second elastic element, and a second transmission element; The second guide post is mounted on the first adjusting plate and has a second axial inner hole inside it; The second elastic element is sleeved outside the second guide post and compressed between the head of the second guide post and the mounting surface of the first adjustment plate; The rod portion of the second transmission member passes through the fourth adjustment elongated hole on the second adjustment plate, and its end is inserted into the second axial inner hole of the second guide post, so that the head of the second transmission member presses the second adjustment plate against the first adjustment plate.

[0012] Furthermore, the second adjustment component includes: The second adjusting component has an external thread on its rod. A limiting part, which is connected to the first adjusting plate; The second spring is sleeved on the rod portion of the second adjusting member; The second adjusting member passes through the limiting part and the second spring in sequence and is threadedly connected to the threaded hole on the second adjusting plate; when the second spring is compressed, its two ends abut against the limiting part and the second adjusting plate respectively; by rotating the second adjusting member, the second adjusting plate can be driven to move slightly relative to the first adjusting plate along the extension direction of the third adjusting hole.

[0013] Furthermore, the center of the turntable is recessed downwards with a groove for accommodating the spindle.

[0014] Compared with the prior art, the beneficial effects of this utility model include at least the following: This utility model's multi-objective switching device uses a suspension base as a fixed support point, which is fixedly connected to the top of the direct-drive motor, providing a stable foundation during suspension use and reducing swaying caused by insufficient load. By using a direct-drive motor to directly drive the turntable's rotation, intermediate transmission links are avoided, fundamentally eliminating runout caused by mechanical backlash and friction, significantly improving the smoothness of objective switching and the stability of final positioning. Multiple objective mounting areas are provided along the circumference of the turntable, allowing the device to accommodate more objectives, expanding the number of objectives that can be mounted, and increasing flexibility. The fine-tuning mechanism enables independent fine-tuning of the objectives in two mutually perpendicular directions. This two-stage fine-tuning mechanism can provide high-precision compensation for the objective mounting position, ensuring that each objective is accurately aligned. Through the synergistic effect of the direct-drive motor, multiple objective mounting areas, and the two-stage fine-tuning mechanism, this multi-objective switching device effectively solves the problems of low objective mounting position accuracy, large rotational runout, and insufficient load during suspension use in existing technologies. Attached Figure Description

[0015] Figure 1This is a three-dimensional schematic diagram of the multi-objective switching device according to an embodiment of the present invention; Figure 2 yes Figure 1 A sectional view of the structure; Figure 3 This is a schematic diagram of the assembly of the fine-tuning unit and the objective lens according to an embodiment of the present invention; Figure 4 yes Figure 3 A schematic diagram of the structure mounted on the turntable; Figure 5 This is a schematic diagram of the structure of the fine-tuning unit according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the first adjustment plate according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the second adjustment plate according to an embodiment of the present utility model; Figure 8 This is a schematic diagram of the fine-tuning unit of this utility model installed on the turntable according to an embodiment of the present invention; Figure 9 yes Figure 8 A bottom view of the structure; Figure 10 yes Figure 8 One of the sectional views of the structure; Figure 11 yes Figure 8 The second sectional view of the structure; Figure 12 yes Figure 8 Sectional view of the structure (Part 3); In the diagram: 1. Suspension mount; 2. Direct drive motor; 3. Turntable; 31. Objective lens mounting area; 32. Groove; 4. Fine-tuning unit; 401. First adjusting plate; 402. Second adjusting plate; 403. First fastener; 404. First adjusting elongated hole; 405. First guide post; 406. First elastic element; 407. First transmission element; 408. Second adjusting elongated hole; 409. First adjusting element; 410. Limiting block; 411. First spring. 412. Spring; 413. Second fastener; 414. Third adjusting elongated hole; 415. Second guide post; 416. Second elastic element; 417. Second transmission element; 418. Fourth adjusting elongated hole; 419. Second adjusting element; 420. Limiting part; 51. Second spring; 52. Upper hook; 53. Elastic part; 54. Balance seat; 55. Bearing seat; 56. Bearing; 57. Lower hook; 58. End cap; 59. Rotation operating part; 6. Objective lens. Detailed Implementation

[0016] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0017] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0018] like Figures 1 to 12 This utility model provides a multi-objective switching device, comprising: Suspension mount 1; A direct drive motor 2, the top of which is fixedly connected to the suspension seat 1, the direct drive motor 2 includes a main shaft; Turntable 3 is used to connect to the main shaft so as to drive it to rotate by the direct drive motor 2. The turntable 3 has multiple objective lens mounting areas 31 along the circumferential direction. The fine-tuning mechanism includes multiple fine-tuning units 4, each of which is mounted on the turntable 3 in a corresponding objective lens mounting area 31. Each fine-tuning unit 4 includes: The first adjustment plate 401 is movably mounted on the turntable 3; The second adjustment plate 402 is used to support the objective lens 6 and is movably disposed on the first adjustment plate 401; The first adjustment component is used to drive the first adjustment plate 401 to make fine adjustments relative to the turntable 3 along a first direction; The second adjustment component is used to drive the second adjustment plate 402 to make fine adjustments relative to the first adjustment plate 401 in a second direction perpendicular to the first direction.

[0019] In this embodiment, the overall technical concept aims to solve the problems of low objective lens mounting accuracy, large runout during rotation, and insufficient load during suspension. Specifically, the working principle of the device is as follows: First, the suspension base 1 of the device is firmly fixed to the top frame of the microscope, providing a stable mounting foundation for the entire device and effectively solving the problem of device wobbling during suspension use. Then, the direct drive motor 2 is started, and its spindle directly drives the turntable 3 to rotate. Due to the direct drive method, the rotation of the turntable 3 is smooth, with almost no jumping that might occur with traditional gear transmission or ball bearings, thus ensuring the smoothness of objective lens 6 switching. When switching to a specific objective lens 6 is required, the direct drive motor 2 precisely rotates the turntable 3 to a preset position, aligning the target objective lens mounting area 31 with the optical path. On each fine-tuning unit 4, the objective lens 6 is mounted on the second adjustment plate 402. When adjusting the objective lens 6, the first adjustment plate 401 can be operated through the first adjustment component, thus compensating for initial machining or assembly errors in the objective lens mounting area 31. After adjustment in the first direction is completed, the second adjustment plate 402 is operated through the second adjustment component to precisely align the optical axis of the objective lens 6 with the optical path of the microscope. Through the two-stage fine-tuning process described above, each objective lens 6 can be independently and precisely positioned after switching to its correct position. Even minor errors that may exist during manufacturing and assembly can be effectively compensated for by the fine-tuning mechanism. Thus, the direct-drive motor 2 provides smooth and accurate macroscopic positioning, while the fine-tuning mechanism provides precise microscopic calibration. The two work together to ensure the excellent performance of the multi-objective switching device in terms of high-speed switching and high-precision positioning.

[0020] Compared to existing traditional multi-objective switching devices, the solution presented in this application represents a technological advancement in several key aspects. Firstly, regarding the number of objectives 6 that can be mounted, traditional devices typically only accommodate five objectives 6, limiting their use in complex applications requiring frequent switching between objectives 6 at different magnifications. The turntable 3 in this application preferably has eight objective mounting areas 31 along its circumference, enabling the device to support more objectives 6, thus meeting the needs of complex applications requiring frequent switching between objectives 6 at different magnifications or demanding higher magnifications, thereby enhancing the device's flexibility and applicability. Secondly, the fine-tuning mechanism in this application includes a movable first adjustment plate 401 and a second adjustment plate 402, as well as a first adjustment component and a second adjustment component, enabling independent fine-tuning of the objectives 6 in two mutually perpendicular directions. This two-stage fine-tuning mechanism provides high-precision compensation for the mounting position of the objectives 6, ensuring that each objective 6 can be precisely aligned, thereby meeting the extremely high positioning accuracy requirements of high-magnification observation or ultra-precision testing applications. Furthermore, regarding rotational stability, the traditional device's mechanism of interaction between the turntable 3 and the steel balls is prone to noticeable bouncing during rotation. This application employs a direct-drive motor 2 to directly drive the turntable 3, eliminating intermediate transmission links and fundamentally removing bouncing caused by mechanical backlash and friction. This significantly improves the smoothness of objective lens 6 switching and the stability of final positioning. Regarding device installation and load support, in traditional devices, the inverted installation of the direct-drive motor 2 during suspension significantly reduces its axial load capacity. This application, through a structural design that fixes the top of the direct-drive motor 2 to the suspension seat 1, provides more robust support for the device, helping to improve the motor's load-bearing capacity in suspension and the overall stability of the device, thereby enhancing its reliability.

[0021] It should be noted that the direct drive motor 2 of this application is also equipped with a Hall sensor and a magnetic origin. At the same time, the direct drive motor 2 can achieve forward and reverse rotation and rotate to the desired position through the shortest path. Specifically, the direct drive motor 2 of this application is an ACW120 motor from Yacobes. The ACW120 motor can save axial space and avoid center of gravity shift.

[0022] In a preferred embodiment, a gravity balancing mechanism is further included, the gravity balancing mechanism comprising: An elastic part 52 is vertically arranged and used to provide the elastic force required to balance gravity, and the upper end of the elastic part 52 is connected to the suspension seat 1. Balance seat 53, which is connected to the turntable 3; Bearing housing 54 is disposed within the balance seat 53 and is threadedly connected to the balance seat 53; Bearing 55 is disposed within the bearing housing 54 and is connected to the lower end of the elastic part 52; The rotating operating part 58 is connected to the bearing housing 54. The tension of the elastic part 52 can be adjusted by rotating the operating part 58 to move the bearing seat 54 axially within the balance seat 53.

[0023] In this embodiment, the elastic part 52 is a component that can deform under external force and return to its original shape after the external force is removed. Its main function is to provide a continuous and adjustable upward support force to counteract the weight of the device. The elastic part 52 can take various forms, such as a helical compression spring, a disc spring assembly, a rubber elastomer, or a gas spring. The balance seat 53 can be an independent annular component, fixed to the bottom of the turntable 3 by bolts or welding. The bearing seat 54 is a component with internal threads, which engages with the threads of the balance seat 53, allowing the bearing seat 54 to move axially by rotation. The main function of the bearing seat 54 is to house the bearing 55 and provide an adjustable mounting platform for precise control of the compression of the elastic part 52. The bearing 55 is disposed within the bearing seat 54, and its function is to reduce friction between the elastic part 52 and the bearing seat 54 and ensure that the elastic force can be transmitted smoothly and efficiently. The rotation operation part 58 is a component for manually or automatically adjusting the position of the bearing seat 54. It is connected to the bearing housing 54, and by rotating it, it drives the bearing housing 54 to move along the thread, thereby changing the compression state of the elastic part 52.

[0024] The gravity balancing mechanism of this application effectively solves the problem of insufficient axial load capacity of the direct drive motor 2 when it is installed upside down through ingenious structural design. Specifically, the elastic part 52 is vertically arranged, with its upper end fixed to the suspension seat 1 and its lower end connected to the bearing seat 54 via a bearing 55. The bearing seat 54 is threadedly connected to the balance seat 53, which is tightly connected to the turntable 3. When the device is suspended, the weight of the turntable 3 and the objective lens 6 it carries acts downward. At this time, the elastic part 52 is compressed, generating an upward elastic force. This elastic force is transmitted to the turntable 3 through the bearing 55, the bearing seat 54, and the balance seat 53, thereby offsetting part or all of the gravity. By rotating the operating part 58, the axial position of the bearing seat 54 within the balance seat 53 can be precisely adjusted. When the bearing seat 54 moves upward, the elastic part 52 is further compressed, and the provided elastic force increases; conversely, when the bearing seat 54 moves downward, the compression of the elastic part 52 decreases, and the provided elastic force also decreases. This adjustable mechanism allows the system to be optimized according to the actual load (e.g., objectives 6 of different weights), ensuring that the direct drive motor 2 only bears a small residual axial load, thus maintaining its stable operation. By distributing the gravitational load from the direct drive motor 2, it can focus on providing rotational torque without bearing excessive axial pressure, thereby ensuring the long-term stability and reliability of the entire multi-objective switching device. This effectively solves the problem of a significant reduction in the axial load capacity of the direct drive motor 2 when inverted, significantly reducing the axial burden on the direct drive motor 2. This not only ensures the stability and reliability of the multi-objective switching device when suspended, avoiding performance degradation or damage due to motor overload, but also, through adjustable elastic force, allows the device to adapt to configurations of objectives 6 of different weights, further improving the system's versatility and service life.

[0025] As a preferred embodiment, refer to Figure 2 The gravity balancing mechanism further includes: The upper hook 51 is mounted on the suspension seat 1; The lower hook 56 is mounted on the bearing 55; End cap 57 is disposed on the end face of the bearing housing 54 and is used to press the bearing 55 into the bearing housing 54; The upper end of the elastic part 52 is connected to the upper hook 51, the lower end of the elastic part 52 is connected to the lower hook 56, and the rotating operation part 58 is mounted on the end cover 57.

[0026] In this embodiment, to address the issues of unstable connection of the elastic part 52 and loose fixing of the bearing 55, an upper hook 51, a lower hook 56, and an end cap 57 are introduced. Specifically, the upper hook 51 is securely mounted on the suspension seat 1, providing a solid upper fixing point for the elastic part 52. The upper end of the elastic part 52 is connected to the upper hook 51 via a reliable mechanical connection, ensuring that the elastic part 52 can stably bear and transmit the tension from the suspension seat 1 when the device is suspended, avoiding a decrease in the efficiency of the balanced force transmission due to loose connection. Simultaneously, the lower hook 56 is mounted on the bearing 55, allowing the lower end of the elastic part 52 to be directly and securely connected to the bearing 55. This direct connection allows the balanced force generated by the elastic part 52 to act efficiently on the bearing 55, and then connect to the turntable 3 via the bearing seat 54 and the balance seat 53, effectively counteracting the gravity of the turntable 3 and its objective lens 6. This design simplifies the force transmission path and reduces errors and instabilities that may be introduced by intermediate links. Furthermore, the end cap 57 is located on the end face of the bearing housing 54 and plays a crucial role in pressing the bearing 55 firmly within the bearing housing 54. Through the fastening action of the end cap 57, the bearing 55 is reliably positioned and fixed inside the bearing housing 54, effectively preventing axial displacement or shaking of the bearing 55 during gravity or rotational operation. This robust bearing 55 fixing method not only enhances the rigidity and stability of the entire gravity balancing mechanism but also provides a stable operating foundation for the rotating operating part 58. The rotating operating part 58 is mounted on the end cap 57, allowing the operator to directly and conveniently drive the bearing housing 54 axially within the balance seat 53 by rotating the operating part 58, thereby precisely adjusting the compression or tension state of the elastic part 52 to adapt to the gravity balancing requirements under different loads. Through this structure, the connection of the elastic part 52 of the gravity balancing mechanism is more stable, and the bearing 55 is more reliably fixed, enabling the entire device to provide continuous and stable gravity balance during suspension use, significantly improving the operational stability and ease of operation of the device.

[0027] As a preferred embodiment, refer to Figure 5 , Figure 6 and Figure 10 The fine-tuning unit 4 further includes: The first adjustable fastening assembly includes a first fastener 403 and a first adjustment elongated hole 404 formed on the first adjustment plate 401. The first fastener 403 passes through the first adjustment elongated hole 404 and is connected to the turntable 3. The first adjustment elongated hole 404 extends along a first direction. The first elastic pressing mechanism is disposed between the first adjusting plate 401 and the turntable 3; The first elastic clamping mechanism is configured to apply a force to the first adjusting plate 401 when the first fastener 403 is loosened, so that the first adjusting plate 401 tends to press against the turntable 3. The first adjustment hole 404 is configured such that when the first fastener 403 is loosened, the first adjustment plate 401 is allowed to remain in contact with the turntable 3 under the action of the first elastic clamping mechanism, and can be finely adjusted relative to the turntable 3 along the first direction.

[0028] In this embodiment, the first adjusting plate 401 and the turntable 3 are arranged in an upper and lower stacked manner. The first adjusting plate 401 is machined with two strip-shaped holes extending along the first direction, namely a first adjusting elongated hole 404 (a hole for the first fastener 403 to pass through) and a second adjusting elongated hole 408 (a hole for the first transmission member 407 to pass through). The first fastener 403 passes through the first adjusting elongated hole 404 on the first adjusting plate 401 and is screwed into the threaded hole on the turntable 3. By tightening the first fastener 403, the first adjusting plate 401 can be firmly pressed and fixed on the turntable 3. The function of the first adjusting elongated hole 404 is to provide guidance and travel space for the sliding of the first adjusting plate 401 relative to the turntable 3 along the first direction when the first fastener 403 is disengaged from the threaded hole on the turntable 3.

[0029] The first elastic clamping mechanism in this embodiment is a key component of the fine-tuning unit 4. Independent of the aforementioned first adjustable fastening assembly, it maintains the contact pressure between the first adjusting plate 401 and the turntable 3 when the first fastener 403 is loosened. Specifically, when precise position adjustment of the objective lens 6 is required, the first adjusting plate 401 in the fine-tuning unit 4 needs to be fine-tuned relative to the turntable 3. Specifically, the first fastener 403 passes through the first adjustment elongated hole 404 and is connected to the turntable 3. When fine-tuning is required, the operator can loosen the first fastener 403. At this time, the characteristic of the first adjustment elongated hole 404 extending along a first direction provides the first adjusting plate 401 with the freedom to move in that direction. Simultaneously, the first elastic clamping mechanism, located between the first adjusting plate 401 and the turntable 3, continuously applies a clamping force to the first adjusting plate 401 after the first fastener 403 is loosened, ensuring it remains tightly fitted to the turntable 3. This clamping force effectively prevents the first adjusting plate 401 from shaking or losing contact during fine-tuning. Therefore, under the continuous action of the first elastic clamping mechanism, the first adjusting plate 401 can make smooth and precise micro-adjustments relative to the turntable 3 along the extension direction of the first adjusting elongated hole 404 without losing stability due to loosening the fasteners. After the adjustment is completed, the first fastener 403 is tightened again to securely lock the first adjusting plate 401 in the new position. This design allows the mounting position of the objective lens 6 to be finely adjusted with high precision while maintaining stable contact, thereby overcoming the problem that the positioning accuracy of the objective lens 6 is limited by processing errors in traditional devices, and significantly improving the positioning accuracy and stability of the entire device.

[0030] As a preferred embodiment, refer to Figure 5 and Figure 10 The first elastic clamping mechanism includes a first guide post 405, a first elastic element 406, and a first transmission element 407; The first guide post 405 is mounted on the turntable 3, and has a first axial inner hole inside it; The first elastic element 406 is sleeved on the outside of the first guide post 405 and compressed between the head of the first guide post 405 and the mounting surface of the turntable 3. The rod portion of the first transmission member 407 passes through the second adjustment elongated hole 408 on the first adjustment plate 401, and its end is inserted into the first axial inner hole of the first guide post 405, so that the head of the first transmission member 407 presses the first adjustment plate 401 against the turntable 3.

[0031] In this embodiment, the first guide post 405 is securely mounted on the turntable 3 and has a first axial inner hole. Its main function is to provide precise axial guidance for the first transmission member 407, thereby ensuring the stability of the movement direction of the first adjusting plate 401 during the micro-motion process and effectively preventing lateral displacement or tilting. The first elastic member 406 is sleeved on the outside of the first guide post 405 and is pre-compressed between the head of the first guide post 405 and the mounting surface of the turntable 3, thereby generating a continuous and uniform elastic force. This elastic force is transmitted to the first transmission member 407 through the first guide post 405, and then acts on the first adjusting plate 401, ensuring that the clamping force is evenly distributed between the first adjusting plate 401 and the turntable 3, avoiding excessive or insufficient local force. The rod of the first transmission member 407 cleverly passes through the second adjustment elongated hole 408 on the first adjusting plate 401, and its end is precisely inserted into the first axial inner hole of the first guide post 405. This structural design allows the first transmission member 407 to provide clamping force while simultaneously allowing the first adjusting plate 401 to freely micro-move along the first direction within the range of the second adjusting elongated hole 408. At the same time, the head of the first transmission member 407 continuously presses the first adjusting plate 401 against the turntable 3, ensuring a tight contact between the two, thus effectively preventing loosening, jumping, or gaps that may occur during micro-adjustment, greatly improving the accuracy of micro-adjustment and the overall reliability of the device. When the first fastener 403 is loosened, the first elastic clamping mechanism continuously applies force to the first adjusting plate 401, keeping it pressed against the turntable 3, and allowing the first adjusting plate 401 to perform smooth and precise micro-adjustments relative to the turntable 3 along the first direction within the range of the first adjusting elongated hole 404 under the action of the first elastic clamping mechanism.

[0032] As a preferred embodiment, refer to Figure 9 The first adjustment component includes: The first adjusting component 409 has an external thread on its rod. Limiting block 410, which is connected to the turntable 3, The first spring 411 is sleeved on the rod portion of the first adjusting member 409; The first adjusting member 409 passes through the limiting block 410 and the first spring 411 in sequence and is threadedly connected to the threaded hole on the first adjusting plate 401. When the first spring 411 is compressed, its two ends abut against the first adjusting plate 401 and the limiting block 410 respectively. By rotating the first adjusting member 409, the first adjusting plate 401 can be driven to move slightly relative to the turntable 3 along the extension direction of the first adjusting elongated hole 404.

[0033] In this embodiment, when the first adjusting member 409 is rotated, its external thread is threadedly connected to the threaded hole on the first adjusting plate 401, thus converting the rotational motion of the first adjusting member 409 into a linear displacement of the first adjusting plate 401 through the threaded pair. This linear displacement occurs along the extension direction of the first adjusting elongated hole 404, thereby achieving precise micro-adjustment of the first adjusting plate 401 relative to the turntable 3. During the micro-adjustment operation, firstly, the first fastener 403 in the first adjustable fastening assembly of the micro-adjustment unit 4 is loosened, allowing the first adjusting plate 401 to remain in contact with the turntable 3 under the action of the first elastic clamping mechanism, and allowing it to micro-move along the extension direction of the first adjusting elongated hole 404. At this time, by rotating the first adjusting member 409, its external thread engages with the threaded hole on the first adjusting plate 401, converting the rotational motion into a linear displacement of the first adjusting plate 401. Because the first spring 411 continuously applies preload to the first adjusting plate 401 under compression, this not only eliminates gaps in the adjusting mechanism but also ensures that the first adjusting plate 401 remains tightly fitted to the turntable 3 during fine-tuning, thus avoiding instability caused by gaps or looseness. Simultaneously, the limiting block 410 serves as a fixed reference, ensuring the accuracy of the axial movement direction of the first adjusting member 409. This design allows the first adjusting plate 401 to undergo smooth and precise fine-tuning relative to the turntable 3 along the extension direction of the first adjusting elongated hole 404. Through the above structure, the first adjusting assembly is organically combined with the first adjustable fastening assembly and the first elastic clamping mechanism. When the first fastener 403 is loosened, the first elastic clamping mechanism ensures contact between the first adjusting plate 401 and the turntable 3 and provides the initial clamping force required for fine-tuning. Based on this, the first adjusting assembly utilizes the precision of the threaded transmission, combined with the preload of the first spring 411, to achieve precise, stable, and repeatable displacement control of the first adjusting plate 401 along the first direction. This structural design effectively overcomes the problems of insufficient precision and poor stability in traditional fine-tuning mechanisms, and significantly improves the positioning accuracy and operational reliability of objective lens 6.

[0034] It should be noted that the first adjusting member 409 can be an adjusting screw with fine threads, and the limiting block 410 can be connected to the turntable 3 by means of screws, riveting, or welding to ensure that its position remains unchanged during the adjustment process, thereby providing a stable reference for the linear movement of the first adjusting member 409. The first spring 411 is a component that provides elastic preload. It is sleeved on the rod of the first adjusting member 409 and provides continuous elastic force during the adjustment process. The first spring 411 can be a helical compression spring.

[0035] In a preferred embodiment, the fine-tuning unit 4 further includes: The second adjustable fastening assembly includes a second fastener 412 and a third adjustment elongated hole 413 formed on the second adjustment plate 402. The second fastener 412 passes through the third adjustment elongated hole 413 and is connected to the first adjustment plate 401. The third adjustment elongated hole 413 extends along a second direction. The second elastic clamping mechanism is disposed between the first adjusting plate 401 and the second adjusting plate 402; The second elastic clamping mechanism is configured to apply a force to the second adjusting plate 402 when the second fastener 412 is loosened, so that the second adjusting plate 402 tends to press against the first adjusting plate 401. The third adjustment hole 413 is configured such that when the second fastener 412 is loosened, the second adjustment plate 402 is allowed to remain in contact with the first adjustment plate 401 under the action of the second elastic clamping mechanism, and can be finely adjusted relative to the first adjustment plate 401 in the second direction.

[0036] In this embodiment, to achieve precise fine-tuning of the second adjustment plate 402 relative to the first adjustment plate 401 along the second direction and to solve potential stability issues during adjustment, this application introduces a second adjustable fastening assembly and a second elastic clamping mechanism. When fine-tuning of the second adjustment plate 402 carrying the objective lens 6 is required, the operator first loosens the second fastener 412 in the second adjustable fastening assembly. At this time, the second elastic clamping mechanism comes into play, and its preset elastic force continuously presses the second adjustment plate 402 against the first adjustment plate 401. This continuous clamping force ensures that the second adjustment plate 402 remains in close contact with the first adjustment plate 401 even when loosened, thereby effectively avoiding wobbling or positional displacement caused by loosening. Simultaneously, the third adjustment elongated hole 413 formed on the second adjustment plate 402, with its extension along the second direction, provides sliding space along that direction for the loosened second fastener 412. Therefore, under the clamping action of the second elastic clamping mechanism, the second adjusting plate 402 can make smooth and controlled micro-adjustments relative to the first adjusting plate 401 along the extension direction of the third adjusting elongated hole 413, i.e., the second direction. Throughout the process, the loosening and tightening of the second fastener 412, and the continuous action of the second elastic clamping mechanism, ensure that the second adjusting plate 402 remains stable during micro-adjustment, thereby ensuring the accuracy and reliability of the objective lens 6 positioning. This design cleverly combines adjustable fixation with continuous clamping, providing a solid foundation for the micro-adjustment function of the high-precision objective lens 6 switching device.

[0037] Specifically, refer to Figure 11 and Figure 12 The second elastic clamping mechanism includes a second guide post 414, a second elastic element 415, and a second transmission element 416; The second guide post 414 is mounted on the first adjusting plate 401, and has a second axial inner hole inside it; The second elastic member 415 is sleeved on the outside of the second guide post 414 and is compressed between the head of the second guide post 414 and the mounting surface of the first adjustment plate 401. The rod portion of the second transmission member 416 passes through the fourth adjustment elongated hole 417 on the second adjustment plate 402, and its end is inserted into the second axial inner hole of the second guide post 414, so that the head of the second transmission member 416 presses the second adjustment plate 402 against the first adjustment plate 401.

[0038] In this embodiment, the working principle of the second elastic clamping mechanism is the same as that of the first elastic clamping mechanism. Specifically, the second guide post 414 is securely mounted on the first adjusting plate 401 and is precisely provided with a second axial inner hole. This provides stable axial guidance for the second transmission member 416, ensuring that the second adjusting plate 402 can move linearly along a preset second direction during fine-tuning, thereby significantly reducing lateral offset and wobbling during the adjustment process. The second elastic member 415 is cleverly sleeved on the outside of the second guide post 414 and is pre-compressed between the head of the second guide post 414 and the mounting surface of the first adjusting plate 401, continuously generating a downward elastic clamping force. When the second fastener 412 is loosened, this elastic force is transmitted to the second adjusting plate 402 through the second transmission member 416. The rod of the second transmission member 416 passes through the fourth adjustment elongated hole 417 on the second adjustment plate 402, and its end is precisely inserted into the second axial inner hole of the second guide post 414, while its head firmly presses the second adjustment plate 402 against the first adjustment plate 401. This structural design ensures that the second adjustment plate 402 maintains close contact with the first adjustment plate 401 even when released, avoiding inaccurate positioning due to gaps or looseness. Simultaneously, the presence of the fourth adjustment elongated hole 417 allows the rod of the second transmission member 416 to move freely within it, thus ensuring that the second adjustment plate 402 can be smoothly and precisely finely adjusted relative to the first adjustment plate 401 along the second direction. As a whole, the entire mechanism, through the precise guidance of the second guide post 414, the continuous pressing of the second elastic member 415, and the coordinated cooperation of the second transmission member 416 and the fourth adjustment elongated hole 417, not only compensates for minor errors that may occur during manufacturing and assembly, but also greatly improves the stability of the objective lens 6, providing a solid foundation for the high-precision positioning of the objective lens 6.

[0039] As a preferred embodiment, refer to Figure 9 The second adjustment component includes: The second adjusting member 418 has an external thread on its rod. The limiting part 419 is connected to the first adjusting plate 401; The second spring 420 is sleeved on the rod portion of the second adjusting member 418; The second adjusting member 418 passes through the limiting part 419 and the second spring 420 in sequence and is threadedly connected to the threaded hole on the second adjusting plate 402; when the second spring 420 is compressed, its two ends abut against the limiting part 419 and the second adjusting plate 402 respectively; by rotating the second adjusting member 418, the second adjusting plate 402 can be driven to move slightly relative to the first adjusting plate 401 along the extension direction of the third adjusting hole 413.

[0040] In this embodiment, the working principle of the second adjustment component is the same as that of the first adjustment component. Specifically, the rod of the second adjustment member 418 is provided with an external thread, which serves as the main driving element, transmitting motion to the second adjustment plate 402 through rotation. The limiting part 419 is firmly connected to the first adjustment plate 401, providing a stable support point and axial limit for the second adjustment member 418. The second spring 420 is sleeved on the rod of the second adjustment member 418 and is in a compressed state after assembly, with its two ends abutting between the limiting part 419 and the second adjustment plate 402, respectively. This pre-compressed second spring 420 continuously applies a preload to the second adjustment plate 402, thereby eliminating any gaps that may exist inside the adjustment mechanism and ensuring the smoothness of the adjustment process. When fine adjustment of the objective lens 6 is required, the operator rotates the second adjustment member 418. Since it is threadedly connected to the threaded hole on the second adjustment plate 402, the rotational movement of the second adjustment member 418 is converted into linear movement of the second adjustment plate 402 relative to the first adjustment plate 401 through the threaded pair. Under the continuous preload of the second spring 420, the second adjusting plate 402 can make smooth, backlash-free micro-adjustments along the extension direction of the third adjusting elongated hole 413. This design works in conjunction with the aforementioned second elastic clamping mechanism to ensure that after the second fastener 412 is loosened, the second adjusting plate 402 can maintain contact with the first adjusting plate 401 and can be precisely driven for micro-adjustment, thereby greatly improving the positioning accuracy and stability of the objective lens 6 in the second direction.

[0041] In a preferred embodiment, the center of the turntable 3 is recessed downwards with a groove 32 for accommodating the spindle.

[0042] In this embodiment, the groove 32 refers to a sunken or recessed space formed in the central area of ​​the turntable 3. Its main function is to provide an embedded mounting position for the spindle of the direct drive motor 2. The groove 32 can be a cylindrical or conical hole, with its inner wall matching the shape of the spindle. It is fixed to the spindle by interference fit, key connection, or threaded connection. This embedded mounting method helps to align the rotation center of the spindle with the geometric center of the turntable 3, reducing eccentricity. The depth of the recess can be designed according to the length of the spindle and the thickness of the turntable 3, so that the top or most of the length of the spindle is below the plane of the turntable 3. The edges of the recess can be designed with chamfers or rounded corners to facilitate the insertion and installation of the spindle and reduce stress concentration.

[0043] By providing a downwardly recessed groove 32 at the center of the turntable 3, the spindle of the direct drive motor 2 can be partially or completely embedded inside the turntable 3. This structural design allows the turntable 3 to "sink" into the connection area of ​​the spindle, thereby significantly reducing the axial height of the connection between the direct drive motor 2 and the turntable 3, achieving a compact device. The embedded support structure provided by the groove 32 enhances the axial load-bearing capacity of the spindle on the turntable 3, effectively alleviating the problem of reduced axial load capacity of the direct drive motor 2 when installed upside down, and ensuring the stability and reliability of the device.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A multi-objective switching device, characterized in that, include: Suspension seat (1); A direct drive motor (2) is fixedly connected to the top of the suspension seat (1), and the direct drive motor (2) includes a main shaft; A turntable (3) is used to connect to the main shaft so as to drive it to rotate by the direct drive motor (2). The turntable (3) has a plurality of objective lens mounting areas (31) along the circumferential direction. The fine-tuning mechanism includes multiple fine-tuning units (4), each fine-tuning unit (4) being mounted on the turntable (3) in a corresponding objective lens mounting area (31). Each fine-tuning unit (4) includes: The first adjustment plate (401) is movably mounted on the turntable (3); The second adjustment plate (402) is used to support the objective lens (6) and is movably disposed on the first adjustment plate (401); The first adjustment component is used to drive the first adjustment plate (401) to make fine adjustments relative to the turntable (3) in a first direction; The second adjustment component is used to drive the second adjustment plate (402) to make fine adjustments relative to the first adjustment plate (401) in a second direction perpendicular to the first direction.

2. The multi-objective switching device according to claim 1, characterized in that, It also includes a gravity balancing mechanism, which comprises: An elastic part (52) is arranged vertically and is used to provide the elastic force required to balance gravity. The upper end of the elastic part (52) is connected to the suspension seat (1). A balance seat (53) is connected to the turntable (3); A bearing housing (54) is disposed within the balance seat (53) and is threadedly connected to the balance seat (53); A bearing (55) is disposed within the bearing housing (54) and is connected to the lower end of the elastic part (52); Rotate the operating part (58), which is connected to the bearing housing (54). The tension of the elastic part (52) can be adjusted by rotating the operating part (58) to move the bearing seat (54) axially within the balance seat (53).

3. The multi-objective switching device according to claim 2, characterized in that, The gravity balancing mechanism also includes: The upper hook (51) is provided on the suspension seat (1); The lower hook (56) is mounted on the bearing (55); An end cap (57) is disposed on the end face of the bearing housing (54) and is used to press the bearing (55) into the bearing housing (54); The upper end of the elastic part (52) is connected to the upper hook (51), the lower end of the elastic part (52) is connected to the lower hook (56), and the rotating operation part (58) is mounted on the end cap (57).

4. The multi-objective switching device according to claim 1, characterized in that, The fine-tuning unit (4) also includes: The first adjustable fastening assembly includes a first fastener (403) and a first adjustment elongated hole (404) formed on the first adjustment plate (401). The first fastener (403) passes through the first adjustment elongated hole (404) and is connected to the turntable (3). The first adjustment elongated hole (404) extends in a first direction. The first elastic pressing mechanism is disposed between the first adjusting plate (401) and the turntable (3); The first elastic clamping mechanism is configured to apply a force to the first adjusting plate (401) when the first fastener (403) is loosened, so that the first adjusting plate (401) tends to press against the turntable (3); The first adjustment hole (404) is configured such that when the first fastener (403) is loosened, the first adjustment plate (401) is allowed to remain in contact with the turntable (3) under the action of the first elastic clamping mechanism, and can be finely adjusted relative to the turntable (3) in the first direction.

5. The multi-objective switching device according to claim 4, characterized in that, The first elastic clamping mechanism includes a first guide post (405), a first elastic element (406), and a first transmission element (407); The first guide post (405) is mounted on the turntable (3) and has a first axial inner hole inside; The first elastic element (406) is sleeved on the outside of the first guide post (405) and compressed between the head of the first guide post (405) and the mounting surface of the turntable (3); The rod of the first transmission member (407) passes through the second adjustment elongated hole (408) on the first adjustment plate (401), and its end is inserted into the first axial inner hole of the first guide post (405), so that the head of the first transmission member (407) presses the first adjustment plate (401) against the turntable (3).

6. The multi-objective switching device according to claim 4, characterized in that, The first adjustment component includes: The first adjusting member (409) has an external thread on its rod. A limiting block (410) is connected to the turntable (3). The first spring (411) is sleeved on the rod portion of the first adjusting member (409); The first adjusting member (409) passes through the limiting block (410) and the first spring (411) in sequence and is threadedly connected to the threaded hole on the first adjusting plate (401); when the first spring (411) is compressed, its two ends abut against the first adjusting plate (401) and the limiting block (410) respectively; by rotating the first adjusting member (409), the first adjusting plate (401) can be driven to move slightly relative to the turntable (3) along the extension direction of the first adjusting elongated hole (404).

7. The multi-objective switching device according to claim 1, characterized in that, The fine-tuning unit (4) also includes: The second adjustable fastening assembly includes a second fastener (412) and a third adjustment elongated hole (413) formed on the second adjustment plate (402), the second fastener (412) passing through the third adjustment elongated hole (413) and connected to the first adjustment plate (401), the third adjustment elongated hole (413) extending in a second direction; The second elastic pressing mechanism is disposed between the first adjusting plate (401) and the second adjusting plate (402); The second elastic clamping mechanism is configured to apply a force to the second adjusting plate (402) when the second fastener (412) is loosened, so that the second adjusting plate (402) tends to press against the first adjusting plate (401); The third adjustment hole (413) is configured such that when the second fastener (412) is loosened, the second adjustment plate (402) is allowed to remain in contact with the first adjustment plate (401) under the action of the second elastic clamping mechanism, and can be finely adjusted relative to the first adjustment plate (401) in the second direction.

8. The multi-objective switching device according to claim 7, characterized in that, The second elastic clamping mechanism includes a second guide post (414), a second elastic element (415), and a second transmission element (416); The second guide post (414) is mounted on the first adjusting plate (401), and has a second axial inner hole inside; The second elastic element (415) is sleeved on the outside of the second guide post (414) and compressed between the head of the second guide post (414) and the mounting surface of the first adjustment plate (401); The rod of the second transmission member (416) passes through the fourth adjustment elongated hole (417) on the second adjustment plate (402), and its end is inserted into the second axial inner hole of the second guide post (414), so that the head of the second transmission member (416) presses the second adjustment plate (402) against the first adjustment plate (401).

9. The multi-objective switching device according to claim 7, characterized in that, The second adjustment component includes: The second adjusting member (418) has an external thread on its rod. The limiting part (419) is connected to the first adjusting plate (401); The second spring (420) is sleeved on the rod portion of the second adjusting member (418); The second adjusting member (418) passes through the limiting part (419) and the second spring (420) in sequence and is threadedly connected to the threaded hole on the second adjusting plate (402); when the second spring (420) is compressed, its two ends abut against the limiting part (419) and the second adjusting plate (402) respectively; by rotating the second adjusting member (418), the second adjusting plate (402) can be driven to move slightly relative to the first adjusting plate (401) along the extension direction of the third adjusting elongated hole (413).

10. The multi-objective switching device according to claim 1, characterized in that, The center of the turntable (3) is recessed downwards with a groove (32) for accommodating the spindle.

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