Microscope objective lens switching mechanism

Abstract

The utility model provides a microscope objective lens switching mechanism, which comprises an objective lens frame, a rotating tower, a transmission mechanism, a driving device and a positioning device, the objective frame is mounted on a frame of the microscope; the rotating tower is rotationally mounted on the objective lens frame, and n objective lenses are uniformly distributed on the rotating tower in the circumferential direction; the transmission mechanism comprises a driving gear and a driven gear, the driving gear is connected with the driving device, the tooth number of the driving gear is a, the driven gear is fixedly connected to the rotating tower and meshed with the driving gear, a positioning part is arranged on the driven gear, and the tooth number of the driven gear is a * n; the driving device is mounted on the objective frame; the positioning device is installed on the objective frame and used for being matched with the positioning part. The driving device drives the driving gear to rotate, the driving gear drives the driven gear to rotate so as to drive the rotating tower to rotate around the objective frame, the driven gear rotates 360 / n degrees every time the driving gear rotates by a circle, namely, the rotating tower rotates the included angle between the adjacent objective lenses, the objective lens of the next specification is automatically switched, and accuracy and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of microscope technology, and in particular to a microscope objective switching mechanism. Background Technology

[0002] When observing microscopic planktonic organisms, it is difficult to observe them with the naked eye and a microscope is needed. Usually, we place a glass slide with a microbial specimen on the stage for observation. The microscope stage is a platform on which the object is placed and is perpendicular to the optical axis of the microscope. It is usually equipped with a mechanical movement device to facilitate the movement of the object along the axis and rotation around the axis, and to position it within the axis range.

[0003] In current microscopes, the objective lenses are switched manually by rotating the frame. This switching speed is slow, reducing observation efficiency, and human contact increases the risk of damage to the objective lenses. Utility Model Content

[0004] In view of this, the present invention proposes a microscope objective lens switching mechanism to solve the technical problems mentioned in the background art, such as the low switching speed caused by manually rotating the objective lens holder, which reduces the efficiency of observation, and the increased risk of objective lens damage due to human contact.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a microscope objective lens switching mechanism, including an objective lens holder, a turret, a transmission mechanism, a drive device, and a positioning device, wherein:

[0007] The objective lens holder is mounted on the microscope frame;

[0008] The turret is rotatably mounted on the objective lens holder, and n objective lenses are evenly distributed along the circumference of the turret;

[0009] The transmission mechanism includes a driving gear and a driven gear. The driving gear is connected to the driving device and has a number of teeth a. The driven gear is fixedly connected to the turret and meshes with the driving gear. The driven gear is provided with a positioning part and has a number of teeth a×n.

[0010] The drive device is mounted on the objective lens holder;

[0011] The positioning device is mounted on the objective lens holder. When the positioning device is matched with the positioning part, the turret is in the initial position, and the axis of one of the objectives is perpendicular to the stage of the microscope.

[0012] Based on the above technical solutions, preferably, the objective lens holder is provided with a rotating shaft, the center of the turret is provided with a rotating hole, and the rotating shaft is rotatably installed in the rotating hole.

[0013] Based on the above technical solutions, preferably, the outer wall of the turret is provided with a connecting ring coaxially, and the connecting ring is fixedly connected to the end face of the driven gear.

[0014] Based on the above technical solutions, preferably, the inner wall of the driven gear is equipped with ball bearings, and the outer wall of the turret is evenly distributed with arc-shaped anti-slip grooves, with the ball bearings installed in the arc-shaped anti-slip grooves.

[0015] Based on the above technical solutions, preferably, the microscope objective switching mechanism further includes a magnet, the positioning part is a mounting hole provided on the end face of the driven gear, and the magnet is installed in the mounting hole;

[0016] The positioning device is a magnetic induction sensor, which is mounted on the objective lens holder and arranged corresponding to the position of the magnet. When the magnetic induction sensor senses the magnet, the turret is in its initial position.

[0017] Based on the above technical solutions, preferably, the turret is provided with six connecting parts for mounting objectives, the gear ratio of the driven gear and the driving gear is 6:1, the driven gear rotates 60° for every revolution of the driving gear, driving the turret to rotate to the position of the next objective lens.

[0018] Based on the above technical solutions, preferably, the driving device is a motor.

[0019] The microscope objective lens switching mechanism of this invention has the following advantages over the prior art:

[0020] (1) When the positioning device matches the positioning part, the turret is in the initial position, the axis of one of the objectives is perpendicular to the stage of the microscope, the turret is rotatably mounted on the objective frame, the driving device drives the active gear to rotate, the active gear drives the driven gear to rotate, thereby driving the turret to rotate around the objective frame. The number of teeth of the active gear is a, the number of teeth of the driven gear is a×n. For every revolution of the active gear, the driven gear rotates 360 / n degrees, that is, the turret rotates the included angle of the adjacent objective lens, and rotates to the position of the next specification objective lens, thereby realizing the automatic switching of the objective lens, improving the speed of objective lens switching, which is not only accurate but also efficient, improving the accuracy and efficiency of the observation results, and avoiding the risk of objective lens damage caused by human contact;

[0021] (2) A connecting ring is coaxially provided on the outer wall of the turret. The connecting ring is fixedly connected to the end face of the driven gear to realize the connection between the driven gear and the turret. The driven gear is installed using the original manual microscope structure without damaging the original structure, thereby improving the structural versatility.

[0022] (3) A ball bearing is installed on the inner wall of the driven gear, and an arc-shaped anti-slip groove is evenly distributed on the outer wall of the turret. The ball bearing is installed in the arc-shaped anti-slip groove. The ball bearing is stuck in the arc-shaped anti-slip groove. When the driven gear rotates, the ball bearing drives the protective arc-shaped groove to mesh and drive the turret to rotate together, so as to avoid the connecting ring being damaged by excessive torque and improve the reliability of the device.

[0023] (4) The positioning part is a mounting hole set on the end face of the driven gear, and the magnet is installed in the mounting hole; the magnetic induction sensor is installed on the objective lens holder and is arranged corresponding to the position of the magnet. When the magnetic induction sensor senses the magnet, the turret is in the initial position. After each use, it is reset to the initial position to facilitate the consistency of the reference for each rotation and improve the accuracy of objective lens switching. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the microscope objective switching mechanism in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the transmission mechanism in an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the turret and driven gear installation in an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the driven gear in an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the turret structure in an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the microscope objective switching mechanism installed in the microscope according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 1-Objective lens holder, 2-Turret, 3-Transmission mechanism, 4-Drive device, 5-Positioning device, 6-Connecting ring, 7-Ball bearing, 8-Magnet;

[0032] 100 - frame, 200 - objective lens;

[0033] 11-Shaft;

[0034] 21-Rotating hole, 22-Arc-shaped anti-slip groove, 23-Connecting part;

[0035] 31-Driving gear, 32-Driven gear, 321-Positioning part. Detailed Implementation

[0036] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0037] Reference Figures 1-6 As shown, this utility model embodiment proposes a microscope objective lens switching mechanism, including an objective lens holder 1, a turret 2, a transmission mechanism 3, a drive device 4, and a positioning device 5, wherein:

[0038] The objective lens holder 1 is mounted on the microscope frame 100;

[0039] The turret 2 is rotatably mounted on the objective lens holder 1. n objective lenses 200 are evenly distributed on the turret 2 along the circumferential direction, and the included angle between two adjacent objective lenses 200 is 360 / n degrees.

[0040] The transmission mechanism 3 includes a driving gear 31 and a driven gear 32. The driving gear 31 is rotatably mounted on the objective lens holder 1 and is connected to the drive device 4. The driven gear 32 is fixedly connected to the turret 2 and meshes with the driving gear 31. The driven gear 32 is provided with a positioning part 321. The number of teeth of the driving gear 31 is a, and the number of teeth of the driven gear 32 is a×n, where a is an integer. The driving gear 31 is a gear with a smaller diameter, and the driven gear 32 is a gear with a larger diameter. The transmission ratio between the driven gear 32 and the driving gear 31 is n. When the driving gear 31 rotates one revolution, the driven gear 32 rotates 360 / n degrees, driving the turret 2 to rotate to the position of the next objective lens 200.

[0041] The drive device 4 is mounted on the objective lens holder 1; the drive device 4 can be a motor;

[0042] The positioning device 5 is installed on the objective lens holder 1. When the positioning device 5 is matched with the positioning part 321, the turret 2 is in the initial position, and the axis of one of the objective lenses 200 is perpendicular to the stage of the microscope.

[0043] The microscope objective lens switching mechanism proposed in this embodiment, when matched with the positioning part 321 by the positioning device 5, has the turret 2 in its initial position, with the axis of one of the objectives 200 perpendicular to the microscope stage. The turret 2 is rotatably mounted on the objective lens holder 1. The driving device 4 drives the driving gear 31 to rotate, which in turn drives the driven gear 32 to rotate, thereby causing the turret 2 to rotate around the objective lens holder 1. The ratio of the number of teeth of the driven gear 32 to that of the driving gear 31 is n times a. For every a revolutions of the driving gear 31, the driven gear 32 rotates 360 / n degrees, that is, the turret 2 rotates the included angle of the adjacent objective lens 200 to the position of the next objective lens 200, thereby realizing the automatic switching of the objective lens 200. This is not only accurate but also highly efficient, improving the accuracy and efficiency of the observation results.

[0044] In some embodiments, the objective lens holder 1 is provided with a rotating shaft 11, and the center of the turret 2 is provided with a rotating hole 21. The rotating shaft 11 is rotatably mounted in the rotating hole 21. A bearing can be installed in the rotating hole 21, and the rotating shaft 11 is fixedly mounted in the bearing, so that the rotating shaft 11 can rotate smoothly around the rotating hole 21, achieving smooth rotation of the rotating shaft 11 around the objective lens holder 1.

[0045] In some embodiments, a connecting ring 6 is coaxially provided on the outer wall of the turret 2, and the connecting ring 6 is fixedly connected to the end face of the driven gear 32. The inner ring of the connecting ring 6 can be welded to the outer wall of the turret 2, and then the connecting ring 6 and the end face of the driven gear 32 can be connected by screws to realize the connection between the turret 2 and the driven gear 32. The driven gear 32 can be installed using the original structure of the manual microscope without damaging the original structure, thus achieving structural versatility.

[0046] In some embodiments, the inner wall of the driven gear 32 is fitted with ball bearings 7, and the outer wall of the turret 2 is evenly distributed with arc-shaped anti-slip grooves 22, in which the ball bearings 7 are installed. By engaging the ball bearings 7 within the arc-shaped anti-slip grooves 22, the driven gear 32 rotates, thereby causing the turret 2 to rotate as well through the engagement of the ball bearings 7 with the arc-shaped anti-slip grooves 22. This prevents the connecting ring 6 from being damaged by excessive torque, improving the reliability of the device.

[0047] In some embodiments, the microscope objective switching mechanism further includes a magnet 8. The positioning part 321 is a mounting hole provided on the end face of the driven gear 32, and the magnet 8 is installed in the mounting hole. The positioning device 5 is a magnetic induction sensor, which is installed on the objective lens holder 1 and arranged corresponding to the position of the magnet 8. When the magnetic induction sensor senses the magnet 8, the turret 2 is in its initial position. The turret 2 is reset to its initial position after each use, ensuring consistency of the reference for each rotation and improving the accuracy of objective lens 200 switching.

[0048] In some embodiments, the turret 2 is provided with six connecting parts 23 for mounting objectives 200. The included angle between two adjacent objectives 200 is 60 degrees. The gear ratio of the driven gear 32 and the driving gear 31 is 6:1. When the driving gear 31 rotates one revolution, the driven gear 32 rotates 1 / 6 revolution (60°), driving the turret 2 to rotate to the position of the next objective 200. Each time the motor drives the driving gear 31 to rotate one revolution, the driven gear 32 rotates 60°, switching the position of one objective 200, thereby achieving the switching of different objectives 200 with high accuracy and efficiency.

[0049] In some embodiments, the turret 2 has an internal position-adaptive structure that ensures it can adaptively adjust to the correct position even with minute angular errors. This enables accurate switching of the microscope objective 200 and further improves the accuracy of objective 200 switching. The position-adaptive structure can be a ball bearing and a hemispherical aperture. A ball bearing is arranged at every 60-degree interval on the turret 2, and a hemispherical aperture is provided at every 60-degree interval on the corresponding objective holder 1. When switching to the next objective 200, the motor drives the drive gear 31 to rotate one revolution, and the driven gear 32 and the turret 2 rotate 60 degrees. The turret 2 may have a minute angular error (±1 degree), and the ball bearing will automatically roll into the hemispherical aperture, allowing the turret 2 to rotate precisely 60 degrees, thus improving the accuracy of objective 200 switching.

[0050] The working principle of the microscope objective lens switching mechanism in this embodiment is as follows: Magnet 8 is embedded in driven gear 32, and turret 2 is located at the position of objective lens 200 1. Magnet 8 is located directly above the magnetic induction sensor. This position is the initial position. When objective lens 200 needs to be switched, the program first returns turret 2 to the initial position. Then, the motor drives the drive gear 31 to rotate, and the drive gear 31 drives the driven gear 32 to rotate, thereby driving turret 2 to rotate around objective lens holder 1. The ratio of the number of teeth of the driven gear 32 to the number of teeth of the drive gear 31 is n times a. For every a revolutions of the drive gear 31, the driven gear 32 rotates 360 / n degrees, that is, turret 2 rotates the included angle of the adjacent objective lens 200 and rotates to the position of the next objective lens 200, thereby realizing the automatic switching of objective lens 200. This is not only accurate but also highly efficient, improving the accuracy and efficiency of observation results.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A microscope objective switching mechanism, characterized in that, It includes a lens holder, turret, transmission mechanism, drive unit, and positioning device, among which: The objective lens holder is mounted on the microscope frame; The turret is rotatably mounted on the objective lens holder, and n objective lenses are evenly distributed along the circumference of the turret; The transmission mechanism includes a driving gear and a driven gear. The driving gear is connected to the driving device and has a number of teeth a. The driven gear is fixedly connected to the turret and meshes with the driving gear. The driven gear is provided with a positioning part and has a number of teeth a×n. The drive device is mounted on the objective lens holder; The positioning device is mounted on the objective lens holder. When the positioning device is matched with the positioning part, the turret is in the initial position, and the axis of one of the objectives is perpendicular to the stage of the microscope.

2. The microscope objective switching mechanism as described in claim 1, characterized in that, The objective lens holder is provided with a rotating shaft, and the center of the turret is provided with a rotating hole, and the rotating shaft is rotatably mounted in the rotating hole.

3. The microscope objective switching mechanism as described in claim 2, characterized in that, The outer wall of the turret is coaxially provided with a connecting ring, which is fixedly connected to the end face of the driven gear.

4. The microscope objective switching mechanism as described in claim 3, characterized in that, The inner wall of the driven gear is fitted with ball bearings, and the outer wall of the turret is evenly distributed with arc-shaped anti-slip grooves, in which the ball bearings are installed.

5. The microscope objective switching mechanism as described in claim 1, characterized in that, The microscope objective switching mechanism also includes a magnet, and the positioning part is a mounting hole provided on the end face of the driven gear, and the magnet is installed in the mounting hole; The positioning device is a magnetic induction sensor, which is mounted on the objective lens holder and arranged corresponding to the position of the magnet. When the magnetic induction sensor senses the magnet, the turret is in its initial position.

6. The microscope objective switching mechanism as described in claim 1, characterized in that, The turret is provided with six connecting parts for mounting objectives. The gear ratio of the driven gear and the driving gear is 6:

1. When the driving gear rotates one revolution, the driven gear rotates 60°, driving the turret to rotate to the position of the next objective.

7. The microscope objective switching mechanism as described in any one of claims 1-6, characterized in that, The drive device is an electric motor.

Images