Adjustable heat shield for hot stage microscope

Abstract

This utility model proposes an adjustable heat insulation cover for a hot-stage microscope, including a base. A microscope mechanism is fixedly installed on the rear side of the base, and a displacement mechanism is fixedly installed on the top rear side of the base. During the application of this technical solution, the heat insulation mechanism and the displacement mechanism work together to allow the heat insulation mechanism to be flexibly adjusted during use, so that the two heat insulation covers can be precisely closed to form a closed space. At the same time, the heat insulation covers, together with heat-insulating silicone pads, can cover the bottom of the microscope body, thereby achieving the effect of reducing heat loss from the operating area in all directions. This solves the problems of high heat loss and temperature susceptibility to environmental interference caused by exposed heating structures in the prior art. It not only allows the heat from the synchronous operation of the main heating wire and the auxiliary heating wire to be efficiently retained, but also maintains the temperature stability of the operating area and avoids the impact of disordered heat diffusion on the activity of experimental samples.

Description

Technical Field

[0001] This utility model relates to the field of microscope body technology, and in particular to an adjustable heat shield for a hot-stage microscope. Background Technology

[0002] In the field of life science research, in vitro manipulation of live experimental samples such as oocytes and embryos is a core experimental step in cell biology, developmental biology, and assisted reproductive technology. These samples are extremely sensitive to the ambient temperature. Temperature fluctuations can not only disrupt the stability of cell membranes and affect the activity of cellular metabolic enzymes, but may also lead to embryonic developmental arrest and loss of oocyte fertilization capacity, directly determining the reliability of experimental results and the feasibility of subsequent research. Since there are significant differences in the physiological body temperature of different species (such as mice, rats, rabbits, and humans) (for example, the normal body temperature of mice is about 37.0-38.5℃, while that of humans is 36.0-37.2℃), the operating temperature under the microscope must be precisely controlled to the corresponding physiological temperature range according to the species of the sample and maintained constant for a long time. This has become one of the core technical requirements of this type of experiment.

[0003] However, most stereomicroscopes currently used in laboratories lack a dedicated temperature-adjustable operating table, failing to meet the temperature control requirements for live samples. Commercially available thermostatic stages for microscopes with temperature control functions also have significant technical and application limitations. Firstly, most mainstream commercial thermostatic stages rely on imports, resulting in high procurement costs. Furthermore, their specifications and shapes are typically fixed designs, making them incompatible with the stage dimensions and installation interfaces of different brands and models of microscopes. This leads to some microscopes being unsuitable for use, or, if compatible, having limited operating space, affecting the flexibility of experimental operations. Secondly, while some commercially available thermostatic stages use a single glass plate as the stage material, providing good light transmittance to meet the observation needs of the microscope, the glass material itself has low mechanical strength. During experimental operations (such as when the operator's hands are supporting the instrument, or when transferring samples), it is difficult to withstand the force applied by the human body, making it prone to breakage. This not only damages the equipment but may also contaminate or physically damage the experimental samples, posing a safety hazard.

[0004] To address the aforementioned issues, related fields have explored technological improvements. For example, Chinese patent CN110673322A discloses a comprehensive heating stage for a microscope body. This device achieves flexible temperature adjustment and constant temperature control with an accuracy of ±0.1℃ through a combination design of a temperature control chassis (with a built-in dual-temperature control Omron module) and a heating stage (composed of a hot plate substrate, heating glass, heating elements, etc.). Simultaneously, the cooperation between the heating glass and the hot plate substrate balances light transmittance and operational functionality, improving the adaptability and temperature control accuracy of traditional heating stages to some extent. However, in practical applications, this technical solution still has a key drawback: the hot plate substrate of its heating stage, as the hot top structure, lacks effective thermal insulation design, leaving the core heating structures such as the heating elements directly exposed to the external environment. This exposed design leads to significant heat loss, with heat rapidly dissipating to non-operating areas. This not only increases the energy consumption of the temperature control system but also makes it difficult to maintain the temperature stability of the operating area over a long period, especially in laboratories where ambient temperatures fluctuate greatly, potentially exceeding the ±0.1℃ temperature control accuracy range. Furthermore, the exposed high-temperature structure can cause discomfort to the hands or arms of operators when handling samples at close range, and may even pose a risk of low-temperature burns. The disordered heat dissipation may also potentially affect the stability of precision optical components around the microscope (such as lenses and light source assemblies), further limiting the reliability of the device in high-precision life science experiments. Therefore, the existing technology has certain defects and shortcomings, necessitating a redesign. Utility Model Content

[0005] To address the aforementioned problems, this invention proposes an adjustable heat shield for a hot-stage microscope, which more accurately solves the problems described above.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model proposes an adjustable heat insulation cover for a hot-stage microscope, including a base, a microscope mechanism fixedly installed on the rear side of the base, a displacement mechanism fixedly installed on the top rear side of the base, heat preservation mechanisms fixedly installed on both sides of the moving ends of the displacement mechanism, and a heating mechanism fixedly installed in the middle of the base.

[0008] The microscope mechanism includes a fixing plate, which is fixedly installed on the rear side of the base. A support frame is fixedly installed on the top of the fixing plate, a vertical linear module is fixedly installed on the inner side of the support frame, and the microscope body is fixedly installed on the front of the vertical linear module.

[0009] Furthermore, the heating mechanism includes an electric heating shell, which is fixedly connected to the middle of the base. A bottom cover is bolted to the bottom of the electric heating shell, and a main heating wire is fixedly connected inside the electric heating shell. The bottom cover covers the outside of the main heating wire.

[0010] Furthermore, a heat-conducting plate is fixedly installed in the middle of the top of the heating housing, the bottom of the heat-conducting plate is attached to the top of the main heating wire, and a temperature sensor is fixedly connected to the middle of the rear side of the top of the heating housing.

[0011] Furthermore, mounting holes are provided at all four corners of the base, and three mounting holes are also provided at the top of the fixing plate in a triangular arrangement. The mounting holes are countersunk holes.

[0012] Furthermore, the displacement mechanism includes a concave frame, which is fixedly installed on the top rear side of the base. Electric push rods are fixedly installed at both ends of the concave frame, and a connecting frame is fixedly installed at the output end of the electric push rod. The heat preservation mechanism is fixedly installed at the outer end of the connecting frame.

[0013] Furthermore, the heat insulation mechanism includes a connecting block, which is fixedly connected to the outer end of the connecting frame. A heat insulation cover is fixedly installed on the side of the connecting block that is close to each other. A heat insulation silicone pad is fixedly connected to the top of the heat insulation cover. The top view shape of the heat insulation cover and the top view shape of the heat insulation silicone pad are both semi-circular arcs.

[0014] Furthermore, an insulating arc plate is fixedly connected inside the heat insulation cover, and an auxiliary heating wire is fixedly installed on the inner side of the insulating arc plate.

[0015] The beneficial effects of this utility model are:

[0016] 1. During the application of this technical solution, the combination of the heat preservation mechanism and the displacement mechanism allows the heat preservation mechanism to be flexibly adjusted in position by the displacement mechanism during use, so that the two heat insulation covers can be precisely closed to form a closed space. At the same time, the heat insulation covers, together with the heat insulation silicone pad, can cover the bottom of the microscope body, thereby achieving the effect of reducing heat loss from the operating area in all directions. This solves the problems of high heat loss and temperature susceptibility to environmental interference caused by the exposed heating structure in the prior art. It not only allows the heat from the synchronous operation of the main heating wire and the auxiliary heating wire to be efficiently retained, but also maintains the temperature stability of the operating area and avoids the impact of disordered heat diffusion on the activity of experimental samples.

[0017] 2. During the application of this technical solution, the synergistic effect of the insulation mechanism and the displacement mechanism allows the opening and closing degree and coverage of the insulation mechanism to be adjusted according to the different experimental sample operation space and microscope body models. Furthermore, the deformable design of its heat-insulating silicone pad can flexibly deform to adapt to microscope bodies of different sizes, and the insulation structure will not obstruct the sample placement and observation. Thus, it achieves a balance between insulation effect and operational flexibility, solving the problem that the fixed insulation structure in the prior art cannot adapt to different operational needs. This ensures that operators can smoothly operate samples during the experiment, while improving the convenience and adaptability of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a top view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model from below;

[0021] Figure 4 This is a top view schematic diagram of the insulation mechanism and displacement mechanism of this utility model;

[0022] Figure 5 This is a bottom view of the insulation mechanism and displacement mechanism of this utility model.

[0023] In the diagram: 1. Base; 2. Microscope mechanism; 21. Fixing plate; 22. Stand; 23. Vertical linear module; 24. Microscope body; 3. Displacement mechanism; 31. Concave frame; 32. Electric push rod; 33. Connecting frame; 4. Insulation mechanism; 41. Connecting block; 42. Heat insulation cover; 43. Heat insulation silicone pad; 44. Heat insulation arc plate; 45. Auxiliary heating wire; 5. Heating mechanism; 51. Heating shell; 52. Bottom cover; 53. Main heating wire; 54. Heat conduction plate; 55. Temperature sensor; 6. Mounting hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] An adjustable heat insulation cover for a hot stage microscope includes a base 1, a microscope mechanism 2 fixedly installed on the rear side of the base 1, a displacement mechanism 3 fixedly installed on the top rear side of the base 1, heat preservation mechanisms 4 fixedly installed on both sides of the moving ends of the displacement mechanism 3, and a heating mechanism 5 fixedly installed in the middle of the base 1.

[0027] The microscope mechanism 2 includes a fixing plate 21, which is fixedly installed on the rear side of the base 1. A support frame 22 is fixedly installed on the top of the fixing plate 21. A vertical linear module 23 is fixedly installed on the inner side of the support frame 22. The microscope body 24 is fixedly installed on the front of the vertical linear module 23. During the application of this device, the base 1 serves as the basic support. Combined with the microscope mechanism 2 on the rear side, the displacement mechanism 3 on the top rear side, the heat preservation mechanism 4 on both moving ends, and the heating mechanism 5 in the middle, the operating area can be heated first by the heating mechanism 5. At the same time, the displacement mechanism 3 is activated to drive the heat preservation mechanism 4 on both sides to move, so that the heat preservation mechanism 4 protects the heated area and reduces heat loss. The vertical linear module 23 in the microscope mechanism 2... The height of the microscope body 24 can be adjusted to facilitate the operator's observation of samples through the microscope body 24. Throughout the process, the base 1 provides a stable mounting foundation for each mechanism, ensuring that each mechanism works in concert. This allows the heat from the heating mechanism 5 to be more concentrated on the operating area, maintaining a stable temperature. Furthermore, the coordination between the displacement mechanism 3 and the heat preservation mechanism 4 prevents disorderly heat diffusion. At the same time, the microscope mechanism 2 can flexibly adjust the observation angle and height to meet the observation needs of different samples. This design not only provides a suitable temperature environment for experimental samples and ensures sample activity, but also allows the operator to perform observation operations more conveniently. It solves the problems of poor temperature control and inconvenient observation that may exist in the existing technology, and improves the stability and convenience of experimental operations.

[0028] Combination Figures 1-5 As shown, the heating mechanism 5 includes an electric heating shell 51, which is fixedly connected to the middle of the base 1. A bottom cover 52 is bolted to the bottom of the electric heating shell 51. A main heating wire 53 is fixedly connected inside the electric heating shell 51. The bottom cover 52 covers the outside of the main heating wire 53. A heat-conducting plate 54 is fixedly installed in the middle of the top of the electric heating shell 51. The bottom of the heat-conducting plate 54 is in close contact with the top of the main heating wire 53. A temperature sensor 55 is fixedly connected to the middle of the rear side of the top of the electric heating shell 51. Mounting holes 6 are provided at the four corners of the base 1. The top of the fixing plate 21 is also provided with three mounting holes 6 arranged in a triangle. The mounting holes 6 are countersunk holes.

[0029] In the above-described embodiments of this application, during the application of this device, the heating mechanism 5 is equipped with an electric heating shell 51, a bottom cover 52, a main heating wire 53, a heat-conducting plate 54, a temperature sensor 55, and mounting holes 6 on the base 1 and the fixing plate 21. This allows the device to be fixed in a suitable position using the mounting holes 6 at the four corners of the base 1 and the top of the fixing plate 21. The countersunk hole design prevents protruding fixing components from affecting use. Then, the heating mechanism 5 is activated, the main heating wire 53 is energized to generate heat, the electric heating shell 51 provides space for heat conduction, and the bottom cover 52 covers the outside of the main heating wire 53 for protection, preventing damage or external interference. The heat from the main heating wire 53 is transferred to the heat-conducting plate 54 attached to the bottom, and the heat-conducting plate 54 distributes the heat evenly. The heating mechanism 5 is distributed throughout the operating area, while the temperature sensor 55 monitors the temperature of the top of the heating shell 51 in real time, allowing operators to easily monitor temperature changes. Throughout the process, the various components of the heating mechanism 5 work together to ensure that heat is applied stably and evenly to the operating area. The temperature sensor 55 helps to control the temperature in a timely manner, preventing abnormal temperatures from affecting the experiment. The design of the mounting hole 6 allows the device to be stably fixed and adaptable to different installation scenarios. This design not only provides a stable heating environment for the experiment and ensures the required temperature conditions for the experimental samples, but also improves the safety and stability of the device through reliable fixing and protection structures. It solves the problems of uneven heating, untimely temperature control, and unstable device fixation that may exist in the existing technology, making the experimental operation smoother and more reliable.

[0030] Example 2

[0031] Combination Figures 4-5 As shown, the displacement mechanism 3 includes a concave frame 31, which is fixedly installed on the top rear side of the base 1. Electric push rods 32 are fixedly installed at both ends of the concave frame 31. A connecting frame 33 is fixedly installed at the output end of the electric push rods 32. The heat insulation mechanism 4 is fixedly installed at the outer end of the connecting frame 33. The heat insulation mechanism 4 includes a connecting block 41, which is fixedly connected to the outer end of the connecting frame 33. A heat insulation cover 42 is fixedly installed on the side of the connecting blocks 41 that are close to each other. A heat insulation silicone pad 43 is fixedly connected to the top of the heat insulation cover 42. The top view shape of the heat insulation cover 42 and the top view shape of the heat insulation silicone pad 43 are both semi-circular arcs. A heat insulation arc plate 44 is fixedly connected inside the heat insulation cover 42. An auxiliary heating wire 45 is fixedly installed on the inner side of the heat insulation arc plate 44.

[0032] In the above-described embodiments of this application, during the application of this device, by setting up a concave frame 31, electric push rod 32, and connecting frame 33 for the displacement mechanism 3, and a connecting block 41, heat insulation cover 42, heat insulation silicone pad 43, heat insulation arc plate 44, and auxiliary heating wire 45 for the heat insulation mechanism 4, the displacement mechanism 3 can be activated first according to the operational requirements. The electric push rods 32 at both ends inside the concave frame 31 start working, driving the connecting frame 33 at the output end to move. The connecting frame 33 then drives the heat insulation mechanism 4 to move synchronously through the connecting block 41, so that the two semi-circular heat insulation covers 42 are adjusted to the appropriate position. At this time, the heat insulation silicone pad 43, which is also semi-circular on the top of the heat insulation cover 42, can fit the corresponding area. At the same time, the heat insulation arc plate 44 inside the heat insulation cover 42 can help block heat. If enhanced insulation is required, the auxiliary heating wire 45 inside the insulation arc plate 44 can be activated to supplement heat. Throughout the process, the displacement mechanism 3 achieves flexible movement of the insulation mechanism 4 through the drive of the electric push rod 32, ensuring that the heat insulation cover 42 can accurately cover the required area. The semi-circular arc structure design makes the insulation range more adaptable to the operating scenario. The heat insulation silicone pad 43 further improves the sealing and heat insulation effect. The cooperation between the insulation arc plate 44 and the auxiliary heating wire 45 can reduce heat loss and supplement heat. This design can not only adapt to different operating needs by flexibly adjusting the position of the insulation mechanism 4, but also maintain the temperature stability of the operating area through multiple insulation structures. It solves the problems of fixed position of insulation structure and poor heat insulation effect in the existing technology, making temperature control more precise and operation more flexible and convenient during the experiment.

[0033] The working principle and advantages of this utility model are as follows: During the application of this device, the entire device is fixed to the laboratory workbench or bracket with bolts through the countersunk holes at the four corners of the base 1 and the countersunk holes arranged in a triangle on the top of the fixing plate 21. The countersunk hole design avoids the bolt heads protruding and affecting the stability of the device placement. The fixing plate 21 provides stable support for the microscope mechanism 2. The vertical linear module 23 is installed on the stand 22 on the top of the fixing plate 21. The vertical linear module 23 is fixedly connected to the microscope body 24. When the vertical linear module 23 is started, it can drive the microscope body 24 to move in the vertical direction and adjust the distance between the microscope body 24 and the heating mechanism 5 below, thereby meeting the focal length requirements when observing different samples. After the device installation and the initial position adjustment of the microscope body 24 are completed, the pre-experiment preparation stage is entered.

[0034] In the pre-experiment preparation stage, based on the required operating space and heating range of the experimental sample, the displacement mechanism 3 is activated. The electric push rods 32 at both ends of the concave frame 31 of the displacement mechanism 3 are energized. The output end of the electric push rod 32 triggers the adjustment connecting frame 33 to move. The connecting frame 33 drives the outer fixed heat insulation mechanism 4 to move synchronously. The connecting block 41 ensures that the heat insulation mechanism 4 moves stably with the connecting frame 33 until the two heat insulation covers 42 move to the preset position and close to each other. At this time, the two heat insulation covers 42 form a complete circular cover, and the arc-shaped heat insulation silicone pad 43 closes with the heat insulation cover 42 and fits against the lower edge of the microscope body 24. At this time, the lower end of the microscope body 24 can be closed and covered, so that a relatively closed space is formed above the heat conduction plate 54 and around the bottom of the microscope body 24. The electric push rod 32 is stopped, and the position adjustment of the heat insulation mechanism 4 is completed. Then the heating mechanism 5 is activated. The main heating wire 53 inside the heating shell 51 is energized to generate heat, and at the same time, the heat insulation cover 42 inside the heating mechanism 52 is heated. The auxiliary heating wire 45 inside the insulation arc plate 44 is synchronously powered on and operates. The main heating wire 53 and the auxiliary heating wire 45 participate in the heating process together. The heating shell 51 provides a closed space for heat conduction to prevent heat from spreading disorderly to the bottom. The bottom cover 52 covers the outside of the main heating wire 53 and protects the main heating wire 53 to prevent external objects from contacting the main heating wire 53 and causing damage or short circuit. The heat generated by the main heating wire 53 is transferred to the heat conduction plate 54 attached to the top. The heat conduction plate 54 evenly distributes the heat, making the surface temperature of the heat conduction plate 54 tend to be uniform, providing a uniform heating environment for the experimental sample. The heat generated by the auxiliary heating wire 45 forms a preheating atmosphere inside the closed insulation cover 42, reducing heat loss in the subsequent insulation stage. At the same time, the temperature sensor 55 in the middle of the rear top of the heating shell 51 monitors the temperature of the heat conduction plate 54 and the surrounding area in real time and transmits the temperature signal to the external control system, so that the operator can grasp the current temperature situation and complete the preheating and temperature monitoring of the heating mechanism 5.

[0035] The experiment then proceeds to the operational phase. If the temperature sensor 55 detects that the temperature of the heat-conducting plate 54 has not reached the required constant temperature, the main heating wire 53 continues to heat, while the auxiliary heating wire 45 operates synchronously to jointly increase the temperature of the heat-conducting plate 54 and the enclosed space until the set temperature is reached. Then, the main heating wire 53 adjusts its heating power based on the feedback signal from the temperature sensor 55, and the auxiliary heating wire 45 also adjusts its power synchronously to maintain overall temperature stability. Simultaneously, the circular enclosure formed by the two heat-insulating covers 42 and the enclosed space covered by the heat-insulating silicone pad 43 effectively reduce heat loss to the sides and above. The heat-insulating silicone pad 43 further enhances the heat insulation effect, preventing heat leakage from the top of the heat-insulating cover 42 and the bottom periphery of the microscope body 24. Even in low ambient temperatures, the auxiliary heating wire 45 effectively reduces heat loss to the sides and above. The heating wire 45 operates synchronously with the main heating wire 53, continuously replenishing any heat that may be lost in the enclosed space, ensuring that the temperature around the heat-conducting plate 54 remains within a stable range, without the need to separately activate the auxiliary heating wire 45. The experimental sample is then placed on the surface of the heat-conducting plate 54, the vertical linear module 23 is activated, and the height of the microscope body 24 is adjusted again so that the lens of the microscope body 24 is aligned with the sample. The operator observes the sample through the microscope body 24 and performs external operations on the surface of the heat-conducting plate 54. During the operation, the heat-conducting plate 54 continuously provides a stable temperature under the action of the main heating wire 53, while the auxiliary heating wire 45 operates synchronously to assist in maintaining the temperature within the enclosed space. The enclosed space formed by the heat-insulating mechanism 4 continuously provides heat preservation, and the temperature sensor 55 monitors the temperature in real time to ensure that the ambient temperature of the sample remains constant.

[0036] After the experiment is completed, the equipment is shut down. First, the power supply to the main heating wire 53 and the auxiliary heating wire 45 is turned off simultaneously to stop heating. Then, the electric push rod 32 is started to move the two heat insulation covers 42 to the sides and disengage them from the closed state, so that they no longer cover the bottom of the microscope body 24. At the same time, they are removed from the area above the heat conduction plate 54 to facilitate the natural cooling of the heat conduction plate 54. After the temperature of the heat conduction plate 54 drops to room temperature, the power supply to the vertical linear module 23 and the microscope body 24 is turned off to complete the entire experimental operation process.

[0037] This technical solution first closes the heat insulation cover 42 to form a closed space, then activates the main and auxiliary heating wires 45 for synchronous heating. Combined with the heat insulation arc plate 44, heat dissipation is reduced. The main heating wire 53 evenly transfers heat through the heat-conducting plate 54. The temperature sensor 55 monitors and feeds back the temperature signal in real time. The main heating wire 53 and auxiliary heating wire 45 synchronously adjust their power according to the signal, effectively reducing heat loss to the external environment, lowering heat energy loss, avoiding the impact of ambient temperature fluctuations on the operating area temperature, maintaining temperature stability, eliminating the need for high-temperature compensation, and reducing energy consumption. Regarding the issue of discomfort for operators coming into contact with exposed high-temperature structures, this technical solution addresses this by first closing the heat insulation cover 42 to form a closed space. The circular enclosure and enclosed space prevent operators from directly contacting the high-temperature heat-conducting plate 54 and main heating wire 53 with their hands. The heat-insulating silicone pad 43 and the heat-insulating arc plate 44 further block heat transfer to the surface of the heat-insulating enclosure 42, keeping the external temperature of the heat-insulating enclosure 42 within a safe range. This isolates the high-temperature area from the operator's workspace, eliminating the risk of low-temperature burns and improving operational safety. Addressing the issue of fixed specifications and poor adaptability of commercially available heating stages, the mounting holes 6 at the four corners of the base 1 and the top of the fixing plate 21 in this technical solution can adapt to the installation requirements of different models of laboratory benchtops or brackets. The vertical linear module 23 drives the microscope body 24 to move vertically, adapting to different... To meet the observation requirements of thick samples, the displacement mechanism 3 adjusts the position of the heat preservation mechanism 4, allowing the heat insulation range to be adjusted according to the stage size and sample operation space of different brands of microscope bodies 24. This enables the device to be used with different brands and models of stereomicroscope bodies 24 without requiring the replacement of the heating stage due to the microscope body model, thus improving adaptability. Addressing the issue of poor load-bearing capacity and fragility of the overall glass stage, the heating mechanism 5's heating shell 51 is made of rigid material, providing stable support for the heat conduction plate 54. The heat conduction plate 54, as the component directly bearing the sample and operational force, possesses high mechanical strength and can withstand some of the force applied by the operator. This design eliminates the need for a glass plate as a load-bearing platform, preventing platform breakage due to weight. The heat-conducting plate 54 combines heat conduction and load-bearing functions, ensuring the platform structure remains stable during experiments without affecting the light transmission requirements for sample observation. Furthermore, the main heating wire 53 can adjust its heating power via a control system, with the auxiliary heating wire 45 adjusting synchronously to regulate the physiological temperature required for different species of samples. Both heating wires work together within a pre-closed space to reduce heat loss. The temperature sensor 55 monitors the temperature in real time, ensuring that temperature fluctuations are controlled within a high-precision range, meeting the core requirements of flexible temperature adjustment and precise constant temperature in the prior art.

[0038] In this technical solution, the main heating wire 53 is made of Cr20Ni80 material with a power specification of 50-200W, and the auxiliary heating wire 45 is also made of Cr20Ni80 material with a power specification of 20-80W; the electric actuator 32 is a DC permanent magnet type, model XTL100, with a rated voltage of 12-24V and a rated thrust of 500-1500N. Each electric actuator 32 is equipped with a gearbox reducer with a reduction ratio of 1:10-1:50, and the motor is equipped with an incremental encoder with a resolution of 100-500 lines, which can realize flexible adjustment of rotation and stepless speed regulation; the vertical linear module 23 is a ball screw type, model KK86, and the drive motor is a stepper motor, model 42HS40, with a rated current of 1.2-2.0A and a step angle of 1.8°. The matching gearbox reducer has a reduction ratio of 1:5-1:20, and the motor has an encoder with a resolution of 200-400 lines.

[0039] The temperature sensor 55 is a PT100 platinum resistance type, with a measurement range of -50-200℃ and an accuracy class of A (±0.15℃). The controller is an STM32F103 series microcontroller, which is installed in the cavity inside the fixing plate 21 on the rear side of the base 1. The controller integrates a 128×64 dot matrix LCD display screen to display real-time temperature, motor operating status and parameter settings.

[0040] The circuit connection is as follows: the external 220V AC power supply is converted into 12V and 24V DC power supply through a switching power supply. The 12V power supply powers the controller, encoder and temperature sensor 55, and the 24V power supply powers the electric push rod 32 and the vertical linear module 23 drive motor. The main heating wire 53 and the auxiliary heating wire 45 are connected to the controller output terminal through a solid-state relay. The solid-state relay model is SSR-40DA with a rated current of 40A.

[0041] The temperature sensor 55 signal is transmitted to the controller via the ADS1115 analog-to-digital converter module. The controller adjusts the duty cycle of the solid-state relay according to the temperature feedback signal through the PWM signal to achieve power control of the main and auxiliary heating wires 45. The electric push rod 32 and the vertical linear module 23 drive motor are connected to the controller through the L298N motor drive module. The controller receives the encoder feedback signal and controls the motor speed and displacement through the PID algorithm to achieve position adjustment of the heat preservation mechanism 4 and height adjustment of the microscope body 24. In addition, an infrared temperature sensor 55 (model MLX90614, measurement range -70-380℃) is installed on the edge of the heat conduction plate 54 to assist in monitoring the sample surface temperature. A limit switch (model D4C-1202, rated current 1A) is installed at the end of the electric push rod 32 stroke to prevent damage to the mechanism due to overtravel. All sensor signals are connected to the controller to form a complete closed-loop control system.

[0042] The vertical linear module uses a ball screw type, specifically model KK86. This model has an effective stroke range of 100-500mm, a lead specification of 5-20mm, a maximum static load of 800-1500N, a maximum dynamic load of 300-800N, a positioning accuracy of ±0.01-±0.03mm, and a repeatability of ±0.005-±0.01mm. It is paired with a 42HS40 stepper motor. This stepper motor has a rated current of 1.2-2.0A, a step angle of 1.8°, and a no-load starting frequency of 1000-3000Hz, meeting the fine displacement requirements of the microscope body in 24 vertical directions. To enhance motor output torque and regulate speed, the KK86 vertical linear module is equipped with a gearbox reducer with a reduction ratio of 1:5-1:20. A reduction ratio of 1:5-1:10 is suitable for scenarios requiring faster speed adjustment, while 1:10-1:20 is suitable for scenarios requiring greater torque to stably support the microscope body 24. Simultaneously, the 42HS40 stepper motor features an incremental encoder with a resolution of 200-400 lines, providing real-time feedback on the motor's rotation angle and speed. This signal is transmitted to the STM32F103 series controller, which uses a PID algorithm to adjust the motor's operating state. This enables the vertical linear module to precisely move the microscope body 24 vertically, meeting the focal length adjustment requirements for observing different experimental samples. It ensures the stability and positional accuracy of the microscope body 24 during movement, adapting to different requirements for lens-sample distance during observation from low to high magnification.

[0043] The scope of protection of this application does not involve improvements to the electronic components of the device or equipment. Therefore, the working principles of each electronic component are not described in detail here. The electronic components in this application are all conventional electronic components used in the prior art. They are all conventional technical means in the prior art, and the application of the prior art is very mature. Therefore, they will not be elaborated here.

[0044] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. An adjustable heat shield for a hot-stage microscope, characterized in that, Includes a base (1), a microscope mechanism (2) is fixedly installed on the rear side of the base (1), a displacement mechanism (3) is fixedly installed on the top rear side of the base (1), a heat preservation mechanism (4) is fixedly installed on both sides of the moving end of the displacement mechanism (3), and a heating mechanism (5) is fixedly installed in the middle of the base (1). The microscope mechanism (2) includes a fixing plate (21), which is fixedly installed on the rear side of the base (1). A stand (22) is fixedly installed on the top of the fixing plate (21), and a vertical linear module (23) is fixedly installed on the inner side of the stand (22). The microscope body (24) is fixedly installed on the front side of the vertical linear module (23).

2. The adjustable heat shield for a hot-stage microscope according to claim 1, characterized in that, The heating mechanism (5) includes an electric heating shell (51), which is fixedly connected to the middle of the base (1). A bottom cover (52) is bolted to the bottom of the electric heating shell (51). A main heating wire (53) is fixedly connected inside the electric heating shell (51), and the bottom cover (52) covers the outside of the main heating wire (53).

3. The adjustable heat shield for a hot-stage microscope according to claim 2, characterized in that, A heat-conducting plate (54) is fixedly installed in the middle of the top of the electric heating housing (51). The bottom of the heat-conducting plate (54) is attached to the top of the main heating wire (53). A temperature sensor (55) is fixedly connected to the middle of the rear side of the top of the electric heating housing (51).

4. An adjustable heat shield for a hot-stage microscope according to claim 3, characterized in that, Mounting holes (6) are provided at the four corners of the base (1), and three mounting holes (6) are also provided at the top of the fixing plate (21) in a triangular arrangement. The mounting holes (6) are countersunk holes.

5. An adjustable heat shield for a hot-stage microscope according to claim 1, characterized in that, The displacement mechanism (3) includes a concave frame (31), which is fixedly installed on the top rear side of the base (1). Electric push rods (32) are fixedly installed at both ends of the concave frame (31). A connecting frame (33) is fixedly installed at the output end of the electric push rod (32). The heat preservation mechanism (4) is fixedly installed at the outer end of the connecting frame (33).

6. An adjustable heat shield for a hot-stage microscope according to claim 5, characterized in that, The heat insulation mechanism (4) includes a connecting block (41), which is fixedly connected to the outer end of the connecting frame (33). A heat insulation cover (42) is fixedly installed on the side of the connecting blocks (41) that are close to each other. A heat insulation silicone pad (43) is fixedly connected to the top of the heat insulation cover (42). The top view shape of the heat insulation cover (42) and the top view shape of the heat insulation silicone pad (43) are both set in a semi-circular arc shape.

7. An adjustable heat shield for a hot-stage microscope according to claim 6, characterized in that, The heat insulation cover (42) is fixedly connected to the inside of a heat insulation arc plate (44), and an auxiliary heating wire (45) is fixedly installed on the inner side of the heat insulation arc plate (44).

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