Continuous zooming microscopic device with motor protection function

Abstract

The utility model discloses a continuous zoom microscopic device with a motor protection function, which comprises a zoom cylinder driven by a motor to rotate, an upper pin connected with a compensation lens group, a lower pin connected with a zoom lens group respectively extending into a compensation wire slot and a zoom wire slot of the zoom cylinder, and a magnet mounted on the lower pin. A first Hall sensor and a second Hall sensor are installed on the zoom cylinder outer cover, the first Hall sensor corresponds to an upper limit area of the zoom wire groove, the second Hall sensor corresponds to a lower limit area of the zoom wire groove, and the zoom cylinder outer cover is connected with a first installation plate and a second installation plate which are used for installing the first Hall sensor and the second Hall sensor. The zoom cylinder outer cover is provided with a first sensor adjusting hole and a second sensor adjusting hole, the first Hall sensor is inserted into the first sensor adjusting hole, the second Hall sensor is inserted into the second sensor adjusting hole, and the first mounting plate and the second mounting plate are respectively provided with a screw adjusting hole. According to the utility model, the sensor can be installed in an adjustable manner, so that the zoom group lens can obtain more accurate position precision.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous zoom microscope devices, in particular to a continuous zoom microscope device with a motor protection function. Background Art

[0002] The electric zoom microscope combines the functions of electric drive and continuous zoom. It realizes the zoom operation through motor drive, thus replacing the traditional manual adjustment method. This design not only improves the convenience of operation, but also reduces the error caused by manual adjustment. At the same time, the continuous zoom function allows the microscope to smoothly adjust the magnification within a certain range, thereby meeting the user's needs for different observation objects and providing users with a more convenient and efficient observation experience. In the electric zoom microscope, the design of the zoom component is crucial. The zoom component usually includes a zoom barrel and a zoom lens group. The zoom barrel is designed with a zoom curve groove. When the motor drives the zoom barrel to rotate, the zoom curve groove will push the zoom pin to move. The movement of the zoom pin then drives the zoom lens group to move up and down in a straight line, thereby realizing the zoom function. When the zoom pin moves and gets stuck at the two extremes of the zoom curve groove, the zoom barrel can no longer continue to rotate, and the motor is also prevented from rotating. At this time, try to stop the motor from rotating. If it does not stop rotating, the motor will be damaged due to overload.

[0003] In order to prevent the motor from being damaged due to overload when the zoom pin moves to the two extreme ends of the zoom curve slot, an existing electric continuous zoom microscope device with motor protection function uses a combination of a magnet and a Hall element sensor as a motor stop control signal to prevent the motor from being damaged due to overload. Specifically, the magnet is installed on the zoom pin, and the Hall element sensor is fixedly installed in the upper extreme area and the lower extreme area respectively. When the zoom pin moves to the two extreme ends of the zoom curve slot, the magnet will approach the corresponding Hall element sensor and generate a signal, thereby controlling the motor to stop rotating. The electric continuous zoom microscope device with motor protection function of this structure has the following disadvantages: 1. Since the magnet and the Hall element sensor are fixedly installed, once the installation is completed, their positions cannot be easily adjusted. This limits the adaptability of the device in dealing with different working conditions or error conditions, making its use range relatively fixed; 2. If the relative position of the magnet and the Hall element sensor is inaccurate due to processing or assembly errors, it will directly affect the accuracy of the motor stop control signal, which may cause the motor to stop when it does not need to stop, or fail to stop in time when it needs to stop, thereby affecting the normal operation of the microscope device. Utility Model Content

[0004] The utility model aims to provide a continuously variable magnification microscope device with a motor protection function, which can solve the problem that the sensor of the existing continuously variable magnification microscope device with a motor protection function is difficult to adjust, which affects the acquisition of a more accurate position accuracy of the zoom group lens.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is: this continuous zoom microscope device with motor protection function includes a zoom barrel driven to rotate by a motor, the zoom barrel is provided with a compensation wire slot and a zoom wire slot, an upper pin connected to the compensation lens group and a lower pin connected to the zoom lens group extend into the compensation wire slot and the zoom wire slot respectively, the lower pin is installed with a magnet, a first Hall sensor and a second Hall sensor are installed on the outer cover of the zoom barrel, the first Hall sensor corresponds to the upper limit area of ​​the zoom wire slot, and the second Hall sensor corresponds to the lower limit area of ​​the zoom wire slot, a first mounting plate for installing the first Hall sensor and a second mounting plate for installing the second Hall sensor are connected to the outer cover of the zoom barrel, a first sensor adjustment hole and a second sensor adjustment hole are provided on the outer cover of the zoom barrel, the first Hall sensor is inserted into the first sensor adjustment hole, and the second Hall sensor is inserted into the second sensor adjustment hole, and the first mounting plate and the second mounting plate are respectively provided with screw adjustment holes.

[0006] In the above technical solution of the continuous zoom microscope with motor protection function, a more specific technical solution may also be: a first groove for accommodating the first mounting plate and a second groove for accommodating the second mounting plate are provided on the outer cover of the zoom barrel.

[0007] Furthermore, the first sensor adjustment hole, the second sensor adjustment hole and the screw adjustment hole are all long holes whose length directions are parallel to the axis direction of the zoom barrel.

[0008] Furthermore, the width of the first sensor adjustment hole is greater than the diameter of the first Hall sensor, the width of the second sensor adjustment hole is greater than the diameter of the second Hall sensor, and the width of the screw adjustment hole is greater than the screw diameter of the screw.

[0009] Furthermore, the length of the first sensor adjustment hole is greater than the same-direction dimension of the first mounting plate, and the length of the second sensor adjustment hole is greater than the same-direction dimension of the second mounting plate.

[0010] Furthermore, two ends of the long hole are semicircular structures.

[0011] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0012] 1. Sensor adjustment holes are respectively opened on the outer cover of the zoom barrel corresponding to the installation position of each Hall sensor, and screw adjustment holes are set on the sensor mounting plate, so that the position of each Hall sensor can be accurately adjusted to overcome the errors generated during the manufacturing and assembly process, thereby ensuring that the motor can stop rotating accurately when the microscope device is in the highest and lowest magnification states, avoiding the contact between the pin and the end of the wire slot, thereby effectively preventing the occurrence of motor overload; more accurate position accuracy of the zoom group lens can be directly obtained through adjustment, which can improve the overall accuracy of the microscope device.

[0013] 2. A groove for accommodating the mounting plate is provided on the outer cover of the zoom barrel, which is conducive to improving the stability of the mounting plate, so that the Hall sensor thereon can work stably and is not easily disturbed by vibration and impact. The position of the Hall sensor is more accurate and stable, the space between the components is reasonably utilized, and the entire device is more compact and beautiful.

[0014] 3. The long hole design and width of the adjustment hole are larger than the corresponding sensor diameter or screw rod diameter, which can increase the adjustment range, improve the accuracy of the installation position, make it easier to install, and improve the installation efficiency.

[0015] 4. The length of the sensor adjustment hole is greater than the same-direction dimension of the corresponding mounting plate, which makes it easier for installers to observe and determine the insertion position of the sensor, improves installation efficiency, and reduces the risk of failure caused by improper installation.

[0016] 5. The two ends of the long hole are semicircular structures, which can avoid stress concentration, enhance structural strength, and make it easier to guide installation and reduce the potential risk of damage to components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the continuous zoom microscope device with motor protection function.

[0018] Figure 2 yes Figure 1 Partial view from the center A direction.

[0019] Figure 3 It is a schematic diagram of the rotation of the zoom tube.

[0020] Figure 4 It is a structural diagram of the guide cylinder.

[0021] Figure numerals: 1. rear fixed mirror group; 2. compensation mirror group; 3. upper pin; 4. lower pin; 5. first Hall sensor; 6. magnet; 7. zoom mirror group; 8. second Hall sensor; 9. front fixed mirror group; 10. large gear; 11. small gear; 12. motor; 13. guide cylinder; 13-1. linear groove; 14. zoom cylinder; 14-1. compensation wire groove; 14-2. zoom wire groove; 15. zoom cylinder cover; 16. first mounting plate; 17. first groove; 18. first sensor adjustment hole; 19. screw adjustment hole; 20. second mounting plate; 21. second groove; 22. second sensor adjustment hole. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0023] Figure 1 and Figure 2 The continuous zoom microscope device with motor protection function shown mainly includes a rear fixed lens group 1, a compensation lens group 2, an upper pin 3, a lower pin 4, a first Hall sensor 5, a magnet 6, a zoom lens group 7, a second Hall sensor 8, a front fixed lens group 9, a large gear 10, a small gear 11, a motor 12, a guide tube 13, a zoom tube 14, a zoom tube cover 15, a first mounting plate 16 and a second mounting plate 20, wherein the rear fixed lens group 1, the compensation lens group 2, the zoom lens group 7 and the front fixed lens group 9 constitute the continuous zoom optical elements of the microscope system, and the distances between them are mutually changed, so that the microscope system device can realize the continuous zoom function. The zoom tube 14 is a part used to change the distance between them, and the zoom tube 14 is provided with a compensation line groove 14-1 and a zoom line groove 14-2, the compensation line groove 14-1 is used to change the moving distance of the compensation lens group 2, and the zoom line groove 14-2 is used to change the moving distance of the zoom lens group 7. The upper pin 3 connected to the compensation lens group 2 and the lower pin 4 connected to the zoom lens group 7 extend into the compensation wire groove 14-1 and the zoom wire groove 14-2 respectively. Figure 3As shown, when the zoom barrel 14 rotates counterclockwise, the compensation line slot 14-1 and the zoom line slot 14-2 respectively generate an upward thrust on the upper pin 3 and the lower pin 4; when the zoom barrel 14 rotates clockwise, the compensation line slot 14-1 and the zoom line slot 14-2 respectively generate a downward thrust on the upper pin 3 and the lower pin 4. The upper pin 3 passes through the compensation line slot 14-1 and the linear slot 13-1 to connect with the compensation group lens 2, and maintains close contact with the two slots; the lower pin 4 passes through the zoom line slot 14-2 and the linear slot 13-1 to connect with the zoom group lens 7, and maintains close contact with the two slots. The lower pin 4 has a round hole for installing a round magnet, and the magnet generates an induction with the Hall sensor installed on the zoom barrel cover 15, which can reflect the position of the zoom group lens 7. The guide cylinder 13 is used to ensure that the compensating lens group 2 and the zoom lens group 7 move in a straight line. The outer circle of the compensating lens group 2 and the zoom lens group 7 is tightly matched with the inner circle of the guide cylinder 13. There is a straight groove 13-1 on the guide cylinder 13. Figure 4 The zoom barrel 14 is driven by a motor through a gear mechanism. The gear mechanism includes a meshing large gear 10 and a small gear 11. The motor 12 is coaxially connected to the small gear 11. The large gear 10 is fixedly connected to the outer periphery of the zoom barrel 14. The motor 12 drives the zoom barrel 14 to rotate through the transmission between the small gear 11 and the large gear 10. The rotation of the zoom barrel 14 will simultaneously drive the compensation lens group 2 and the zoom lens group 7 to move. The synchronous movement of the compensation lens group 2 and the zoom lens group 7 can ensure that the magnification of the microscope device changes, thereby realizing the electrification of the zoom of the microscope device.

[0024] The outer cover 15 of the zoom barrel is equipped with a first Hall sensor 5 and a second Hall sensor 8 of an inductive magnet. The first Hall sensor 5 is installed in the upper limit area corresponding to the upper end of the zoom line slot 14-2 of the lower pin 4, and the second Hall sensor 8 is installed in the lower limit area corresponding to the lower end lock of the lower pin 4 at the zoom line slot 14-2. In order to compensate for the errors caused by processing and assembly, the installation position of the Hall sensor in this embodiment is adjustable in a small range. Specifically, a first mounting plate 16 for mounting the first Hall sensor 5 and a second mounting plate 20 for mounting the second Hall sensor 8 are connected to the outer cover 15 of the zoom barrel. Preferably, a first groove 17 for accommodating the first mounting plate 16 and a second groove 21 for accommodating the second mounting plate 20 are provided on the outer cover 15 of the zoom barrel. The first sensor adjustment hole 18 and the second sensor adjustment hole 22 are respectively opened at the first groove 17 and the second groove 21 on the zoom barrel cover 15. The first Hall sensor 5 is vertically fixed at the center of the first mounting plate 16, and its free end is inserted into the first sensor adjustment hole 18; the second Hall sensor 8 is vertically fixed at the center of the second mounting plate 20, and its free end is inserted into the second sensor adjustment hole 22; the free ends of the first Hall sensor 5 and the second Hall sensor 8 are both located in the zoom barrel cover 15 to avoid rotation interference. The first mounting plate 16 and the second mounting plate 20 both have screw adjustment holes 19, and the screw adjustment holes 19 on each mounting plate are symmetrically distributed on both sides of their respective sensor adjustment holes.

[0025] In order to more accurately adjust the moving range of the zoom lens 7, it is necessary to adjust the position of the Hall sensor that is induced by the magnet 6. The first sensor adjustment hole 18, the second sensor adjustment hole 22 and the screw adjustment hole 19 are all long holes whose length direction is parallel to the axial direction of the zoom barrel 14, and the two ends of the long holes are semicircular structures. More preferably, the width of the first sensor adjustment hole 18 is greater than the diameter of the first Hall sensor 5, the width of the second sensor adjustment hole 22 is greater than the diameter of the second Hall sensor 8, and the width of the screw adjustment hole 19 is greater than the screw diameter of the screw. In this way, the Hall sensor can be adjusted to a suitable position as needed, and the motor 12 can be controlled to stop rotating, so as to avoid the lower pin 4 being stuck at the two ends of the zoom line slot 14-2 during electric zooming, causing economic losses caused by overload of the motor 12. Because the sensor is installed on the back of the mounting plate, in order to facilitate the accurate placement of the sensor into the corresponding sensor adjustment hole during installation, the length of the first sensor adjustment hole 18 is greater than the same-direction dimension of the first mounting plate 16, and the length of the second sensor adjustment hole 22 is greater than the same-direction dimension of the second mounting plate 20. In this way, the mounting plate will not completely block the sensor adjustment hole, making it easier for the installer to observe and determine the hole position.

[0026] When the microscope is working, at the lowest magnification, see Figure 3The lower pin 4 is close to the second Hall sensor 8, and the magnet 6 on the lower pin 4 and the second Hall sensor 8 are mutually induced, and a signal to stop the rotation is sent to the motor 12, and the motor 12 stops rotating counterclockwise. The upper pin 3 and the lower pin 4 are close to the lower ends of the compensation line slot 14-1 and the zoom line slot 14-2, respectively, but do not touch the ends. When the magnification of the microscope needs to be increased, the motor 12 is controlled to rotate clockwise, which will drive the zoom barrel 14 to rotate counterclockwise. The upper pin 3 and the lower pin 4 are respectively moved upward by the upward thrust generated by the compensation line slot 14-1 and the zoom line slot 14-2, and at the same time, the compensation group mirror 2 and the zoom group mirror 7 are gradually moved upward in a straight line. See Figure 3 In the b position, the magnification of the microscope device gradually increases. When the magnet 6 on the lower pin 4 senses the first Hall sensor 5, a signal is sent to the motor 12 to stop the clockwise operation. At this time, the microscope device is in the highest magnification state. Figure 3 c position in; when the magnification of the microscope device needs to be reduced, the control motor 12 rotates counterclockwise, which will drive the zoom barrel 14 to rotate clockwise, and the upper pin 3 and the lower pin 4 respectively obtain the downward thrust generated by the compensation groove 14-1 and the zoom groove 14-2 to move downward, and at the same time, the compensation group mirror 2 and the zoom group mirror 7 will gradually move downward in a straight line, see Figure 3 At position b in the microscope, the magnification of the microscope device gradually decreases, and the magnet 6 on the lower pin 4 is induced by the second Hall sensor 5, which sends a signal to the motor 12 to stop counterclockwise operation. At this time, the microscope device is in the lowest magnification state. In this process, the motor 12 can be controlled to stop rotating as needed to obtain the required image data.

[0027] The Hall sensor of the continuous zoom microscope with motor protection function adopts an adjustable installation method. This design not only optimizes the operating stability of the microscope under different magnifications, but also significantly enhances the control performance of the motor. Specifically, by accurately adjusting the position of the Hall sensor, it can be ensured that the motor can stop rotating accurately when the microscope is in the highest and lowest magnifications, thereby avoiding the contact between the pin and the end of the wire slot and effectively preventing the occurrence of motor overload. The installation position of the Hall element sensor has a small range of adjustability. This feature enables us to directly obtain a more accurate position accuracy of the zoom lens. Compared with the traditional method of indirectly adjusting the position of the zoom lens by controlling the rotation angle of the zoom barrel, this direct adjustment method can ensure that the zoom lens obtains a more accurate position. This not only improves the overall accuracy of the microscope, but also makes the system more stable and reliable during operation.

Claims

1. A continuous zoom microscope device with a motor protection function, comprising a zoom barrel driven to rotate by a motor, the zoom barrel is provided with a compensation wire slot and a zoom wire slot, an upper pin connected to a compensation lens group and a lower pin connected to a zoom lens group extend into the compensation wire slot and the zoom wire slot respectively, the lower pin is provided with a magnet, a first Hall sensor and a second Hall sensor are provided on an outer cover of the zoom barrel, the first Hall sensor corresponds to an upper limit area of ​​the zoom wire slot, and the second Hall sensor corresponds to a lower limit area of ​​the zoom wire slot, characterized in that: A first mounting plate for mounting the first Hall sensor and a second mounting plate for mounting the second Hall sensor are connected to the outer cover of the zoom barrel. A first sensor adjustment hole and a second sensor adjustment hole are provided on the outer cover of the zoom barrel. The first Hall sensor is inserted into the first sensor adjustment hole, and the second Hall sensor is inserted into the second sensor adjustment hole. The first mounting plate and the second mounting plate are respectively provided with screw adjustment holes.

2. The continuously variable magnification microscope device with motor protection function according to claim 1, characterized in that: The outer cover of the zoom barrel is provided with a first groove for accommodating the first mounting plate and a second groove for accommodating the second mounting plate.

3. The continuously variable magnification microscope device with motor protection function according to claim 1 or 2, characterized in that: The first sensor adjustment hole, the second sensor adjustment hole and the screw adjustment hole are all long holes whose length directions are parallel to the axis direction of the zoom barrel.

4. The continuously variable magnification microscope device with motor protection function according to claim 3, characterized in that: The width of the first sensor adjustment hole is greater than the diameter of the first Hall sensor, the width of the second sensor adjustment hole is greater than the diameter of the second Hall sensor, and the width of the screw adjustment hole is greater than the screw diameter of the screw.

5. The continuously variable magnification microscope device with motor protection function according to claim 4, characterized in that: The length of the first sensor adjustment hole is greater than the same-direction dimension of the first mounting plate, and the length of the second sensor adjustment hole is greater than the same-direction dimension of the second mounting plate.

6. The continuously variable magnification microscope device with motor protection function according to claim 5, characterized in that: The two ends of the long hole are semicircular structures.

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